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ore beneficiation process flotation process equipment

how to process copper ore: beneficiation methods and equipment | fote machinery

how to process copper ore: beneficiation methods and equipment | fote machinery

All available copper-bearing natural mineral aggregates are called copper mines. The high-grade copper concentrate can be obtained by the coarse grinding, roughing, scavenging of copper ore, then grinding and concentrating of coarse concentrate.

Due to the different types of ore, the nature of the ore is also different, so the beneficiation process needs to be customized. The specific process for selecting copper ore depends mainly on the material composition, structure and copper occurrence state of the original copper ore.

Before the beneficiation of copper ores, crushing and grinding are required. The bulk ores are crushed to about 12cm by a jaw crusher or a cone crusher. Then the crushed materials are sent to the grinding equipment, and the final particle size of the copper ore is reduced to 0.15-0.2mm.

Copper sulfide can be divided into single copper ore, copper sulfur ore, copper-molybdenum deposit, copper nickel, carrollite and so on. Basically, only flotation can be considered in its separation.

Almost all copper sulphide ores contain iron-bearing sulfides, so in a sense, the flotation of copper sulfide is essentially the separation of copper sulfide from iron sulfide. The common iron sulfide minerals in copper ore are pyrite and pyrrhotite.

1 Disseminated grain size and symbiotic relationship of copper and iron sulfide. Generally, pyrite has a coarse grain size, while copper ore, especially secondary copper sulfide, is closely associated with pyrite. Only when the copper ore is finely ground can it be dissociated from pyrite. This characteristic can be used to select copper-sulphur mixed concentrates, discard the tailings, and then grind and separate the mixed concentrate.

2 The influence of secondary copper sulfide minerals. When the secondary copper sulfide mineral content is high, the copper ions in the slurry will increase, which will activate the pyrite and increase the difficulty of Cu-S separation.

3 The influence of pyrrhotite. The high content of pyrrhotite will affect the flotation of copper sulfide. Pyrrhotite oxidation will consume the consumption of oxygen in the pulp. In severe cases, the copper minerals do not float at the beginning of flotation. This can be improved by increasing inflation.

Generally, copper is floated firstly and then sulfur. The content of pyrite in dense massive copper-bearing pyrite is quite high and high alkalinity (free CaO content> 600800g/m3) and high dosage of xanthine are often used to suppress the pyrite. There is mainly pyrite in its tailings with few gangues, so the tailings are sulfur concentrates.

For the disseminated copper-sulfur ore, the preferential flotation process is adopted, and the sulphur in the tailings must be re-floated. To reduce the consumption of sulfuric acid during the floatation and ensure safe operation, the process condition of low alkalinity should be adopted as far as possible.

It is more advantageous for copper sulfur ore containing less sulfur with copper easy to be floated. Carry out the bulk flotation firstly in the weakly alkaline pulp and then add lime to the mixed concentrate to separate the copper and sulfur in the highly alkaline pulp.

In semi-preferential bulk-separation flotation, Z-200, OSN-43 or ester-105 with good selectivity are used as collectors to float copper minerals firstly. The copper concentrate is then subjected to copper-sulfur bulk flotation and the obtained copper-sulfur mixed concentrate is subjected to separation flotation of floating copper and suppressing sulfur.

It avoids the inhibition of the easily floating copper under high lime consumption and does not require a large amount of sulfuric acid-activated pyrite. It has the characteristics of reasonable structure, stable operation, a good index and early recovery of target minerals.

3 The xanthate collector mainly plays the role of chemisorption together with the cation Cu (2 +), so minerals whose surface contains more Cu (2 +) minerals have a strong effect with the xanthate. The order of the effect is: chalcocite > covellite > porphyrite> chalcopyrite.

4 The floatability of copper sulfide minerals is also affected by factors such as crystal size, mosaic size, being original or secondary. The minerals with fine crystal and mosaic size are difficult to float. Secondary copper sulfide ore is easy to oxidize and more difficult to float than original copper ore.

As for the grinding and floating process, it is more advantageous to adopt the stage grinding and floating process for refractory copper ore, such as the re-grinding and re-separation of coarse concentrate, re-grinding and re-separation of bulk concentrate, and separate treatment of medium ore.

Copper oxide (CuO) is insoluble in water, ethanol, soluble acid, ammonium chloride and potassium cyanide solutions. It can react with alkali when slowly dissolving in ammonia solution. The beneficiation methods of oxidized copper ore mainly include gravity separatio, magnetic separation (see details on copper ore processing plant), flotation and chemical beneficiation.

Flotation is one of the commonly used mineral processing techniques for copper oxide ores. According to the different properties of copper oxide ores, there are sulphidizing flotation, fatty acid flotation, amine flotation, emulsion flotation and chelating agent-neutral oil flotation method.

Process flow: The dosage of sodium sulfide can reach 1~2kg/t during vulcanization. Because the film produced by vulcanization is not stable and is easy to fall off after vigorous stirring, and sodium sulfide itself is easily oxidized, sodium sulfide should be added in batches.

Besides, the vulcanization speed of malachite and azurite is relatively fast, so the vulcanizing agent can be directly added to the first flotation cell with no need to stir in advance during vulcanization and adjust the amount of vulcanizing agent according to the foam state.

Fatty acids and their soaps are mainly used as collectors of fatty acid floatation, also known as direct flotation. During flotation, water glass (gangue inhibitor), phosphate, and sodium carbonate (slurry regulator) are also usually added.

There is a practice of mixing vulcanization and fatty acid methods. Firstly float the copper sulfide and part of the copper oxide with sodium sulfide and xanthate, and then float the residual copper oxide with fatty acid.

For example, the ore in the Nchanga processing plant in Zambia contains 4.7% copper. The copper content achieved to 50% ~ 55% through flotation by adding 500g/t of lime (pH 9 ~ 9.5), 10g/t of cresol (foaming agent), 60g/t of ethylxanthate, 35g/t of amyl xanthate, 1kg/t of sodium sulfide, 40g/t of palmitic acid and 75g/t of fuel oil.

It is mainly to sulfurize the copper oxide mineral firstly and then add the copper accessory ingredient to create a stable oil-wet surface. Then, the neutral oil emulsion is used to cover the mineral surface, resulting in a strong hydrophobic floating state. In this way, the mineral can be attached to the foams firmly to complete the separation.

Many problems should be paid attention to in the flotation of copper ore, such as the length of the vulcanization time, whether to add sodium sulphide in batches and the proportion of chemicals. Here is a brief introduction.

1 The vulcanization time. Different ores require different vulcanization times. Generally speaking, it should be short rather than longer. The suitable vulcanization time is 1 to 3 minutes. After 6 minutes, the recovery rate and concentrate grade will decrease.

2 Add sodium sulfide in batches. The roughing time for processing the ore in the concentrator is about ten minutes, while the ore contains a large amount of carbonaceous gangue and the divalent sulfur ions disappear quickly in the slurry. So the effect of adding sodium sulfide in batches is better than that of adding it once.

3 Add sodium sulfide proportionally. Generally, copper oxide floats in the liquid at a slower speed, and reduce the number of cycles of the mineral in the flotation process can obtain a higher recovery rate. It is of great significance to study the distribution ratio of sodium sulfide among different operations to catch the mineral at the right time.

The chemical beneficiation method is often used for refractory copper oxide and mixed copper. For some copper oxide minerals with high copper content, fine mosaic size and rich sludge, the chemical beneficiation method will be used to obtain good indicators because the flotation method is difficult to realize the separation.

The solution of ammonia and ammonium carbonate in a concentration of 12.5% was used as the solvent to leach for 2.5h at a temperature of 150, a pressure of 1925175~2026500Pa. The mother liquor can be distilled by steam at 90 to separate ammonia and carbon dioxide. Copper, on the other hand, is precipitated from the solution as black copper oxide powder.

Because some copper oxide minerals are not tightly combined with iron, manganese, etc., it is difficult to separate them by using the magnetic separation method alone, and flotation has a good separation effect.

Therefore, the flotation method is used to obtain high-grade concentrates, the magnetic separation is for tailings and wet smelting is carried out finally. This process combines flotation, magnetic and wet smelting very well, which greatly increases the recovery rate and reduces the beneficiation cost.

The above are several common beneficiation methods for copper oxide minerals. For the selection of copper oxide minerals, it is best to conduct a professional beneficiation test and customize the process according to the report.

Flotation is the most widely used method in copper mine production. The copper ore pulp is stirred and aerated, and the ore particles adhere to the foams under the action of various flotation agents. The foams rise to form a mineralized foam layer, which is scraped or overflowed by the scraper. This series of flotation processes are all completed in the flotation machine. (Contact Manufacturer)

The internal magnetic system of the barrel adopts a short circuit design to ensure that the barrel skin has no magnetic resistance at high speeds, and the stainless-steel barrel skin does not generate high temperatures, extending the life of the magnetic block.

Since it adopts a dynamic magnetic system design, the roller does not stick to the material, which is conducive to material sorting. The selected grade can be increased by 3-6 times to more than 65%.

Copper mines are generally purified by flotation, but for the beneficiation of copper minerals with coarser grain size and higher density, the pre-selection by the gravity separation method will greatly reduce the cost and achieve flotation indicators.

As a leading mining machinery manufacturer and exporter in China, we are always here to provide you with high quality products and better services. Welcome to contact us through one of the following ways or visit our company and factories.

Based on the high quality and complete after-sales service, our products have been exported to more than 120 countries and regions. Fote Machinery has been the choice of more than 200,000 customers.

summary of fluorite ore flotation process - jxsc machine

summary of fluorite ore flotation process - jxsc machine

Taking deep research on the features, extraction methods, and fluorite mining machines have a significant positive effect on running the fluorite processing plant successfully. In the following paragraphs, I have made a detailed introduction from fluorite mineral attribute to extraction methods and machines and listed 2 cases for your reference.

Fluorite (also called fluorspar) is a mineral that common in nature, consists mainly of calcium fluoride( CaF2), can be symbiotic with many other minerals. More in wiki https://baike.baidu.com/item/%E8%90%A4%E7%9F%B3/258531?fromtitle=%E8%90%A4%E7%9F%B3%E7%9F%BF&fromid=8815755&fr=aladdin

Just as is the case with almost ore processing and non-metal beneficiation, the concentrate fluorite is extracted by crushing, sieving, grinding, grading, flotation, filtration, drying, etc. How to realize the high-efficiency sorting of associated fluorite ore is a real problem in the fluorite beneficiation process. Therefore, based on the characteristics of the associated fluorite ore, summarized the beneficiation method and floating agent of the types of associated fluorite ore. We, the JXSC mining machine factory, would be delightful provide you with the flotation machines.

The separation of quartz and fluorite achieved by grinding, it is an important factor affecting the flotation of quartz-type fluorite. The ground ore of a coarse size indicates that may have many associated fluorite ore lumps, these lumps may increase the silica content, decrease the flotation effect. If the grinding particle size is too fine, although quartz and fluorite have been dissociated from the monomer, it will cause the fluorite losing easily, thus reduce the recovery rate of fluorite.

In order to dissociate the fluorite from the quartz and not to pulverize the fluorite, the stage grinding process is generally used, which can reduce the silicon content in the fluorite concentrate after flotation and increase the fluorite recovery rate.

The results show that under the same conditions of grinding fineness, the fluorite concentrate by rod mill obtains a lower Si O2 content. Compared with ball milling, the particle size of rod grinding is more uniform, rod mill control the grinding fineness better.

In order to solve the difficulties in the separation of high calcium quartz fluorite ore, researchers did a great time of experiment. Studies have shown, the fluorite beneficiation effect of 97.21% concentrate grade and 69.04% recovery rate can be obtained when the condition of -0.074 mm grain taking 83.62% percentage, flotation 6 times, the PH value of slurry is 9-10YN-12 as the capture agent, sodium silicate, tannic and the Calgon as the inhibitors. When the PH value is 6, the sodium oleate has a significant effect on the recovery of pure fluorite minerals during the flotation process. However, when the slurry contains fine-grained quartz ore, the performance of sodium oleate to capture fluorite decreases. The capture ability of the oleic acid gradually improved by adding the sodium hexametaphosphate to disperse the quartz and fluorite. In a word, fine-grained quartz type fluorite ore is better to adopt the stage grinding process method to get the best size. Besides, it is best to use Na2CO3 to adjust PH value, choose oleic acid, oxidized paraffin, sodium silicate as a combination of collector and inhibitor.

Calcite type fluorite ore mainly consists of fluorite, and calcite( more than 30%). Since both calcite and fluorite are calcium-containing minerals, they have similar surface physicochemical properties. When coexisting in solution, they are prone to the mutual transformation between minerals, making separation of the two difficult to achieve.

Fatty acid collectors can float both of calcite and fluorite, therefore, it is needed to adjust the PH value of slurry. Practice shows that the PH value has a great impact on the flotation. When the PH value in the range of 8-9.5the fatty acid collectors can display function both of the fluorite and calcite. But in the weak acidic medium, the calcite has a lower floatability. Although it is difficult to separate calcite and fluorite by flotation, we still have chance to realize it by adjusting the PH value, choosing suited inhibitor(sodium silicate, salinization sodium silicate, acidification sodium silicate, Calgon, lignin sulfonate, dextrin,tannin, etc.), and using oleic acid as the trapping agent.

The barite type fluoride ore mainly consists of barite(10%-40%) and fluoride, also associated with iron pyrite, gelenite, sphalerite, and other sulfide minerals. It is not easy to separate the barite and fluoride because of the similar floatability. In general, the flotation process of the barite type fluoride ore is divided into two steps, one is combination flotation that obtains the combination of concentrate both of barite and fluorite, another is flotation that separation the barite and the fluorite from the combination concentrate.

Flotation of the first step: Na2CO3 as the conditioner of PH value, oleic acid as the capture agent, and sodium silicate as the inhibitor. Flotation of the second step has two ways: 1 Inhibiting barite and floating fluorite: inhibitors have lignin sulfonate, sodium silicate, NAF, dextrin, aluminum salt, ferric salts; captor has oleic acid. 2 Inhibiting fluorite and floating barite: adjusting the PH value the slurry to strong alkalinity by the sodium hydrate, using the citric acid, barium chloride, ammonium salt, sodium silicate as the inhibitors, and using the oleic acid or sodium alkyl sulfate as the collector.

The mineral composition of sulfide-type fluorite is similar to that of quartz type fluorite, but the content of the metal mineral is higher than that of the quartz type, and sometimes, the content of lead and zinc can reach the industrial grade. Therefore, it is necessary to take the recovery of the other metal mineral into considered. Usually, adopt the captor for sulfide minerals to select the metal sulfide minerals preferentially, then use the captor of fatty acid to recover the fluorite from the flotation tailings. In addition, roasting, leaching, and other processes can also help to extract valuable metals and to decompose fluorite.

A great deal of research and production practice shows that flotation is a useful method for recovering fluorite ores, suit for large scale fluorite ore processing, the beneficiation method( flotation process and chemical agent) varies from the ore characteristics. if you need a fluorite ore flotation machine, pls contact us.

flotation separation process|china flotation separating production line supplier|flotation separating equipment-henan fote machinery co., ltd

flotation separation process|china flotation separating production line supplier|flotation separating equipment-henan fote machinery co., ltd

The flotation separation process also known as the flotation separating production line realizes the mineral particle separation based on the working principle of different physical and chemical properties of the minerals leading to different floatability.

The flotation separation process also known as the flotation separating production line realizes the mineral particle separation based on the working principle of different physical and chemical properties of the minerals leading to different floatability. The China flotation separating production line consists of the following parts: jaw crusher, ball mill, classifier, mixing tank, flotation separating equipment, vibrating screen and dryer, etc.

1. The equipment made by the famous Chinese flotation separating production line supplier of Fote is widely used to separate non-ferrous metals like copper, zinc, lead, nickel and gold as well as to realize the rough or fine separation of ferrous metals and non-metals.

2. Both the production index and working efficiency of the flotation separating production line are high. The separated sulfide ore can reach the recycling rate of over 90% and the concentrate grade comes close to the theoretical value of the pure ore.

3. It is suitable for the fine ore and micro ore treatments. Its hard for customers to recycle the fine ore with the particle size less than 10m, so we can also take the flotation separating production line.

Henan Fote Heavy Machinery Co,. Ltd. is a large joint-stock corporation, majoring in heavy mining machinery and civil machinery manufacturing. Fote occupies an area of 360,000 square meters, including 60,000 square meters of standard heavy industrial workshops equipped with over 500 large and medium-sized metal processing, riveting and assembly equipment. Total online staff of Fote Heavy Machinery is more than 2,000.

The magnetic separation process, also named the magnetic separating production line and made up of jaw crusher, ball mill, classifier, magnetic separating equipment, concentrator and dryer, is a wet and dry separation combination method of magnetite.

The flotation separation process also known as the flotation separating production line realizes the mineral particle separation based on the working principle of different physical and chemical properties of the minerals leading to different floatability.

Henan Fote Heavy Machinery Co., Ltd.,the former Henan First Machinery Factory,founded in Henan Zhengzhou- China machinery manufacturing capital in 1982,is a large joint-stock company specialized in manufacturing heavy mining machinery and civilian machinery; it has six production bases with an area of 240,000 m, more than 2000 existing employees, 160,000 m standardized....

what are the production process configuration and production process of gold ore beneficiation equipment-ftm machinery

what are the production process configuration and production process of gold ore beneficiation equipment-ftm machinery

The ore dressing production line is divided into gold ore beneficiation production line, copper ore beneficiation production line, iron ore beneficiation production line, etc. according to the processing materials. The gold ore is processed by the beneficiation process, and the gold metal-rich in it can be extracted and the extraction ratio is high. The corresponding market price is good. It is one of the hot projects of mineral processing investment.

Gold ore refers to gold ore or gold deposits. Gold ore is a mineral aggregate with sufficient gold content and industrial use. The reserves of gold deposits account for more than 46% of the reserves of rock gold.

The equipment for the re-election process has crusher, spiral chute, magnetic separator, etc. The process is relatively simple. For the flotation process, it is necessary to configure a crusher, a ball mill, a vibrating screen, a classifier, a flotation machine, a magnetic separator, etc., and the recovery rate is high. The specific process also needs laboratory analysis, and the ore dressing equipment is selected according to the user's production needs.

The gold ore beneficiation production line is a non-filtered cyanide carbon slurry process that uses activated carbon to directly absorb and recover gold from cyanide pulp, including preparation of leaching pulp, cyanide leaching, activated carbon adsorption, desorption of gold charcoal, gold mud by electric shock, gold carbon recycling and leaching slurry processing.

Flotation is a widely used mineral processing method for processing gold depositing in gold concentrators. It is commonly used to treat sulfide minerals containing gold ore with high floatability. The flotation process can enrich gold to sulfide minerals, tailings can be directly discarded, and the cost of mineral processing is low. 80% of Chinese rock gold mines are selected by this process.

The gold ore beneficiation production line is divided into several parts such as crushing, grinding and flotation. The equipment used is jaw crusher, ball mill, flotation machine, dryer, mixing tank, spiral classifier, circular vibrating screen, and concentration.

Firstly, the gold mine is crushed by a crushing device, and then pulverized and ground by a ball mill, and then subjected to beneficiation treatment using a classifier, a mixing tank, a chute, and a flotation machine. The beneficiation process is carried out by re-election, flotation, extracting the concentrate and tailings, and then applied the chemical method of the ore dressing agent, and then smelted into finished gold.

Henan Fote Heavy Machinery Co., Ltd. (FTM) is a professional manufacturer of mining equipment, focusing on the production of mining machinery and equipment for more than 40 years, mainly producing various types of stone crushing equipment, powder grinding equipment, ore beneficiation equipment, and building material equipment. Our company has many types of equipment with complete models and perfect functions. The machine is sold directly from our factory, so the price of the equipment is lower, and the user can purchase the appropriate equipment at a preferential price. Users interested in these machines are welcome to consult, inspect, and order equipment.

how to process lead-zinc ore by gravity and froth flotation | fote machinery

how to process lead-zinc ore by gravity and froth flotation | fote machinery

Lead-zinc ores generally have to go through beneficiation into concentrates to smelt lead and zinc metal products, which are widely used in the chemical industry, such as the mechanical and chemical industry, petrochemical industry and so on. The beneficiation process of lead-zinc ore is generally crushing, grinding, gravity separation for waste disposal and froth flotation.

Medium crushing section: Products under the vibrating screen and coarsely crushed lead-zinc ores enter the vibrating screen for the second pre-screening. The products on the screen are crushed in the cone crusher.

Fine crushing section: Products under the screen and the ores have been medium crushed enter the third screen together. The products on the screen enter the cone crusher for fine crushing, then the fine crushing products return to the vibrating screen for screening, forming a closed-circuit process.

Tip: When the content of fine ores (0-3 mm) account for more than 5% of the original ore, among which 200 mesh particles account for about 10%, and the water content exceeds 8%~10%, to ensure smooth ore crushing and avoid the blockage of silo, desliming or ore washing by sand washing machine is necessary before coarse or fine crushing.

The products under the ore washing screen (usually -7 mm) enter the spiral classifier. The sand returned enters into the fine ore bin, while the overflow after concentration is combined with the overflow of the classifier in the first grinding stage.

Because of its high density and low hardness, lead ore is easy to be over-grinded. To improve grinding conditions and increase the recovery rate of ore dressing, some concentrators adopt stage grinding and stage separation circuit to re-grind and re-concentrate tailing after roughing.

Using such grinding and dressing circuit can not only prevent the ore from grinding to the monomer dissociation at one time and cause the coarse-grained minerals to be over-crushed, but also solve the problem of insufficient grinding that cannot achieve monomer dissociation.

The first stage of grinding: Send the lead-zinc powder of 0-15 mm screened by the vibrating screen evenly to the ball mill for grinding. After the first stage of grinding, control the classification by the spiral classifier to increase the amount of sand returned by the first stage of ball mill.

The second stage of grinding: The overflow particle size of the second stage of grinding increases from -0.074 mm accounting for 78% to more than 85%, which significantly reduces the aggregates of sphalerite and galena in rough lead concentrates.

Re-grinding and re-concentration of tailings: Concentrated tailings will return to the lead coarse selection as middlings in lead concentration. Rough zinc concentrates, as rough lead concentrates, are re-ground and re-concentrated. Thus, the problems of uneven embedding and sorting of metallic minerals are solved effectively.

For coarse-grained or aggregate disseminated lead-zinc ore, pre-selection and waste disposal measures with large production capacity and low beneficiation costs are often adopted to discard a large amount of gangue and surrounding rock waste in advance.

Gravity beneficiation is a common method using a heavy liquid with appropriate specific gravity to make the lighter minerals float up while the heavier minerals sink. The dense medium of heavy liquid mainly includes ferrosilicon, magnetic ore powder, barite, furnace ash, pyrite and so on.

A lead-zinc mine in South Africa is mainly composed of three sulfide minerals: galena, sphalerite and pyrite. Among them, the contents of sphalerite are the most, galena and pyrite are relatively less. The mineral composition of the ore is as follows:

Through the heavy medium separation process, 41.55% of floating ores can be discarded in advance, which can effectively reduce the amount of grinding and improve the grade of selected ores. Finally, the sinking ores and fine ores with a yield of 58.45% can be obtained.

Mixing in mixing tank: After the ground pulp is classified by the classifier, it enters the mixing tank for mixing. Control the slurry concentration at 25-35%, then add flotation agent to control the slurry pH value 9-11 and stir it for 6-15 min.

Agents adding: Pour the well-stirred lead-zinc slurry directly to the flotation machine, and inhibit zinc by inhibitors. Add lead collectors firstly to collect the lead, then add activator to activate zinc, finally use zinc collectors to collect zinc.

Concentration and drying: The lead-zinc concentrates after flotation contain certain moisture, which need to be concentrated and precipitated in the thickener, and then dried and dehydrated by the dryer to obtain the finished lead-zinc concentrates.

Under the condition that the raw ore contains 9.53% of lead, 6.37% of zinc, 13.28% of sulfur, and -0.074 mm ore is accounting for 78%, after one roughing, two sweepings, two beneficiations of lead, as well as one roughing, two sweepings sand three beneficiations of zinc, customers can obtain:

The original production process is "concentration of lead, bulk flotation of zinc and sulfur". The total recovery rate of silver in lead and zinc concentrate is 50-60%. The process index is as follows:

Fote focuses on the comparison of schemes, investment costs and comprehensive utilization of minerals when processing lead-zinc ores, therefore we improve the flotation process and propose selective flotation of lead and zinc. With the concentrate grade basically unchanged, the total recovery rate of lead and zinc has increased by nearly 3%.

For the raw ore containing 3.26% of lead and 2.54% of zinc, Fote adopts a lead-zinc bulk flotation process to finally obtain a lead-zinc mixed concentrate with a comprehensive grade of about 43% (of which lead contains about 25% and zinc 18%).

The comprehensive recovery rate of lead and zinc is about 85%, which is far greater than that of the lead-zinc concentrator provided (70% lead and 60% zinc) when the selective flotation process was used.

As a leading mining machinery manufacturer and exporter in China, we are always here to provide you with high quality products and better services. Welcome to contact us through one of the following ways or visit our company and factories.

Based on the high quality and complete after-sales service, our products have been exported to more than 120 countries and regions. Fote Machinery has been the choice of more than 200,000 customers.

home- amug mining equipment, ore dressing process & equipment, ore flotation & beneficiation

home- amug mining equipment, ore dressing process & equipment, ore flotation & beneficiation

At Anchor Mining Union Gold, we seek to generate superior returns for our shareholders by identifying and investing in precious metals exploration and mining opportunities.

limonite beneficiation process,limonite flotation technology,flotation process and equipment | prominer (shanghai) mining technology co.,ltd

limonite beneficiation process,limonite flotation technology,flotation process and equipment | prominer (shanghai) mining technology co.,ltd

The current international situation has pushed iron ore, a mineral resource, to hot discussion. Common ones include magnetite, hematite, limonite and siderite. Among them, limonite, as a typical refractory iron ore, has the characteristics of easy siltification and poor sorting indicators. However, due to its abundant reserves, it is a favorable backing to solve the shortage of iron resources. The common limonite beneficiation method mainly includes a single sorting process and a joint sorting process.

In order to further improve the quality of high-quality goods, most limonite concentrators usually use the washing-gravity separation process. First, the ore washing machine, trough-type ore washing machine and scrubbing machine are used to wash the ore, and then the heavy medium and equal weight are used. The sorting equipment is mostly used to sort limonite and false hematite. The advantages of the limonite beneficiation method are simple gravity separation equipment, low cost, and low power consumption. The disadvantages are low recovery rate and high tailing grade, which is not conducive to comprehensive recovery of resources.

Because limonite ore contains iron, they are all magnetic. The difference in iron content in limonite ore also causes the difference in their magnetic properties. This allows us to beneficiate through the difference in magnetic properties. Strong magnetic separation is used to separate limonite ore, but this limonite beneficiation method has a poor recovery rate for fine-grained (-20um iron minerals).

The single flotation method has a better effect on the recovery of fine-grained iron minerals, but the flotation effect is seriously affected due to the easy sludge of limonite ore, so it is very important to consider desliming or strengthening the dispersion of sludge before flotation. Because of its fine particle size, it is difficult for the sludge to adhere to the surface of the air bubbles, forming a separate layer of mineralized foam to float out, and easy to adhere to the surface of coarse particles. When the surface of coarse-grained limonite is attached to gangue mud, its selectivity and floatability are significantly reduced; the specific surface and surface energy (activity) of the ore mud are large, and the first is the adsorption (consumption) of a large amount, resulting in a large amount of slurry oil and viscosity Large, which reduces the selectivity and floatability of the easy-floating ore; the second is the strong hydration ability. Once the sludge adheres to the bubbles, the hydration film on the bubble surface is not easy to remove, which gives the concentrate and filter belt Serious difficulties caused the recovery rate to drop.

In addition, due to the loose crystallization of limonite particles and large specific surface area, it is easy to adsorb and consume a large amount of reagents in the flotation process. Therefore, the limonite beneficiation method should adopt a multi-stage dosing and multi-stage separation flotation process. The ore return to form a closed-circuit flotation process will reduce the sorting index, and the centralized return processing of the ore has a smaller impact on the sorting index than the sequential return of the ore.

Prominer has been devoted to mineral processing industry for decades and specializes in mineral upgrading and deep processing. With expertise in the fields of mineral project development, mining, test study, engineering, technological processing.

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