crusher equipment and grinding mills for gabbro crushing processing production line
Gabbro is a coarse-grained, dark-colored, intrusive igneous rock. It is usually black or dark green in color and composed mainly of the minerals plagioclase and augite. It is the most abundant rock in the deep oceanic crust. Gabbro has a variety of uses in the construction industry. Gabbro sometimes contains economic amounts of some relatively rare metals. Gabbros containing significant amounts of the mineral ilmenite are mined for their titanium content. Other gabbros are mined to yield nickel, chromium or platinum.
Color - dark grey to black.
Texture - phaneritic (medium to coarse grained)
Mohs hardness: 7-7.5
Silica (SiO2) content - 45%-52%.
Uses - as aggregate, fill etc. in the construction and roading industries; cut and polished for dimension stone (called black granite) for building facings, foyers etc.
Gabbro can be formed as a massive, uniform intrusion via in-situ crystallisation of pyroxene and plagioclase, or as part of a laminate as a combination intrusion formed by decantation pyroxene and plagioclase. Cumulate gabbros are more properly called pyroxene - plagioclase orthocumulate.
Gabbro is an essential part of the oceanic crust, and can be found in many ophiolite complexes as parts of zones III and IV (sheeted dyke zone to massive gabbro zone). Belts long gabbro is generally formed at proto -rift margins and around ancient rift zone, intruding into the flanks of rift zones. Assumptions of mantle plume can rely on identifying mafic and ultramafic intrusions and contemporary volcanic basalt.
In the process flow of Gabbro crushing line, vibrating feeder is the first used mining equipment to supply raw material to stone crusher machine. The primary stone crusher is jaw crusher or PEX jaw crusher whose aim is to make big stone smaller.
The secondary stone crusher is cone crusher. Cone crusher is a kind of crushing machine commonly used in mining, metallurgical industry, construction, road construction and chemical industry. Our cone crusher can be used to crush hard and medium hard minerals, rocks, iron ores, limestone, copper ores, quartz, granite, sandstones, etc. In a whole production line, usually, the cone crusher is used for secondary or tertiary crushing process, or first crushing. Cone gabbro crusher is the best machine to crush gabbro. The finished product is cubic, and of good quality, great strength to resist compression. With low contents of needle and slice particles.
The mobile crusher plant is widely used to match the crushing and sieving equipment in many industries including metallurgy, coal mine, mineral dressing, building material, chemical, grinding, etc. If you are looking for a mobile crushing plant for contracting with the ability to produce clean, precisely sized end products effectively, the track mounted mobile crushing plant is the answer. SBM's track mounted mobile crushing plant is designed to crush hard rock and any recycling materials equally effectively. In addition, the screen allows track mounted mobile crushing plant to screen the crushed materials into the desired, clean end products, meeting the strictest application requirements. Today there are over twenty models and over forty configurations of mobile crushing and screening plants available in our company, with several hundred units delivered to customers from the following countries such as India, South Africa, Ghana, Malaysia, the Philippines, Mexico, Iran, and Pakistan and so on. If you are interested, please do not hesitate to contact us. SBM experts will analysis your requirements and design a best crushing solution for you.
large scale tracked stone crusher, mobile ore crushing plant sale
SBM is a professional and famous large scale tracked stone crushing plant manufacturer. The mobile tracked crushing plant manufactured by SBM is the right choice for crushing in quarry operations. High quality equipment will provide to our customers.
The tracked crushing plant can be operated as a stand-alone unit or in conjunction with secondary and tertiary unit as a multi-stage operation. It can also be combined with the mobile conveyor system to eliminate truck haulage of the primary crushed material.
To solve the distance problem in the mining and construction process, SBM has manufactured the tracked crusher to meet clients' needs. The tracked crusher main includes jaw crusher, cone crusher. This machine brings a new dawn in crushing and screening equipment.
SBM large scale tracked jaw crusher is available in a range of sizes and is fitted with world renowned jaw crushers. The single toggle crushing action and design of jaw crusher geometry perfected over many years gives impressive outputs when crushing even the hardest of materials. Where high capacities, reliability and excellent maneuverability are required, SBM tracked jaw crusher will perform.
Tracked cone crusher is high performance machines suitable for use in secondary or tertiary applications where reliability coupled with versatile mobility is required. It is renowned for achieving significant rates of reduction, cubical product shape and providing high quality aggregate and sub-base material. The equipment can also be fitted with a recirculating conveyor and single deck screen to further reduce oversize materials in a complete pass.
Simple hydraulic circuits;
Remote control operation;
Dust suppression sprays;
Folding hopper for transport;
Fully skirted product conveyor;
Well proven high performance;
Fuel efficient hydraulic clutch as standard;
Rapid set-up time and ease of transportation;
Advanced electronic control system interface;
Heavy duty fabricated chassis and track frame;
High throughput capacity and large reduction rates;
Robust and durable crushers featuring rapid setup times.
The high capacity and robust design of the large scale tracked stone crushing plant make it particularly well suited for use in large quarries and in other open pit operations. It is the most widely used primary unit in connection with the mobile conveyor. The mobile tracked crushing plant incorporates jaw crusher and cone crusher for mobile applications, with the following superior features: a big nominal feed opening and a sturdy structure.
The large scale tracked stone crushing plant is a perfect with a proven track record of effective cost reduction. Working together as a mobile plant, the mobile conveyor carries the material crushed by the primary unit via a field conveyor to secondary crushing. The conveyor can follow the primary unit as it moves along the quarry face and can easily be moved to a safe distance from the face for blasting.
Given the easy maneuverability of the mobile conveyor, breaks in production caused by blasting are minimized. Substantial savings can be achieved by introducing the mobile tracked crushing plant system in place of dump truck haulage. This also means lower levels of dust and exhausts gas emissions as well as improved safety in the workplace.
Base on decades of years R&D experience and thousands of clients production experience, SBM updated our tranditional vibrating feeder and developped the TSW series feeder, which can greatly improve the whole production line capacity.
aggregate crushing plant 600-1000 tph | mining, crushing, grinding, beneficiation
Aggregate crushing plant is most used in stone quarry or construction material making. These crushing plants can be used to crush basalt, granite, limestone, river stone, diorite, gabbro, anorthosite, peridotite, sandstone, dolomite, flint, etc.
Aggregate crushing plant of 600 TPH 800 TPH consists of jaw crusher, cone crusher, VSI crusher and other auxiliary equipment. The capacity of crushing and screening plant is widely used in large mining, quarrying, construction sites to process iron ore, gold, copper, bauxite, limestone, granite, basalt and so on.
The major feeding equipment feed raw materials into primary crushing. The heavy duty jaw crusher usually plays role as primary crushing machine. The new designed vibrating feeder as feeding equipment is a kind of high efficiency auxiliary equipment in a crushing plant. CS cone crusher or HP cone crusher is the most popular cone crushing machine. The major screening equipment is used to separate the crushed materials. And our VSI crusher is also widely used to produce high quality aggregate or metallic minerals.
800-100TPH aggregate crushing plant is the largest scale crushing plant in aggregate crushing industry. It is widely used to crush limestone, cobble stone, river stone, rubble stone, gravel etc. This type of stone crushing plant consists of jaw crusher, cone crusher, VSI crusher is broadly adopted by corporations in aggregate manufacturing plant, ore dressing plant and mineral beneficiation plant and so on.
Kefid not only can supply small capacity of aggregate crushing plant, but also can supply large capacity of aggregate crushing plant. Now, our five 800 to 1000 ton stone crushing plants have installed in worldwide, two sets in domestic and others in Russia, Nigeria, Ghana, Brazil.
africa snapshot: eight companies with promising projects
Be it gold, copper, cobalt or uranium, the African continent has powerful resources for mining. And there are several industry-friendly governments that are ready to secure their futures with new projects.
African Gold Group(TSXV: AGG; US-OTC: AGGFF) has set its sights on building Africas next mid-tier gold producer. A definitive feasibility study was filed in July 2020 for its 100%-owned Kobada gold project in Mali. Developing the project would require a capital expenditure of $125 million, plus an $11 million contingency.
The study forecast the post-tax net present value at a 5% discount rate would be C$266 million with an internal rate of return of 41.1% at a gold price of $1,530 per ounce. The mine would produce 100,000 oz. gold per year for the first five years and a total of 728,654 oz. over a 9.4-year mine life. Over the life of the mine, all-in sustaining costs would be $784 per oz. gold.
African Gold is currently updating the definitive feasibility study to add tonnage to reserves and expand resources. The company says considerable work will also be done to optimize mining and scheduling, refine the mineral processing flowsheet and engineering a larger tailings containment facility. Such work will support the mining of sulphide resources and their treatment in a carbon-in-leach (CIL) plant.
Cobalt Blockchain(TSXV: COBC; US-OTC: COBCF) plans to supply ethically sourced cobalt from the Democratic Republic of the Congo (DRC). The company and its partners have developed a blockchain-based certification method called Mintrax that will be piloted on its own operations.
The company has two joint ventures totaling more than 48-sq-km in the DRC. It has a 70% interest (private partner 30%) in the operator Alpha Cobalt SAS about 50 km east of Kolwezi and 10 km from the Tenke Fungurume copper-cobalt mine, which is owned by China Molybdenum and a private Chinese equity firm. Cobalt Blockchain also holds an 80% interest in Cobalt Blockchain SAS with another private partner. These holdings cover two concessions in an area 50 km from Lubumbashi with active artisanal and small scale copper-cobalt mining.
In preparation for launching its Mintrax technology, perhaps as early as May this year, Cobalt Blockchain has strengthened its management team, created a special advisory committee, and settled its outstanding debt.
In January 2021 an updated preliminary economic assessment was done for a bio-heap leaching project. The initial capital cost would be C$341 million to create a mine and mill that would treat 55,000 tonnes of ore per day over a 24-year mine life. With copper recovery at 85%, Haib would produce 2.2 billion lb. copper equivalent over its life. A lower mining rate would significantly reduce the capex requirement, the company says.
Deep-South has examined the project at four different copper prices producing widely varying economic scenarios. At a copper price of $2.25 per lb., the project has an after tax net present value (NPV) at a 7.5% discount rate of $439 million and an after tax internal rate of return (IRR) of 18.9%. At $3.00 per lb. copper, the after tax NPV jumps to $957 million, and the IRR to 29.7%.
The company says it has so far only scratched the surface of the 370-sq-km property, but has already outlined 3.1 billion lb. of copper in indicated resources (in 456.9 million tonnes at 0.31% copper) and 2.2 billion lb. in inferred resources (342.4 million tonnes grading 0.29% copper).
The porphyry deposit contains a 140 million tonne high grade zone with grades of between 0.5% and 1.0% copper in widths of up to 150 metres. The company says the high grade zone is expected to grow as infill drilling proceeds to determine a measured resource. The zone is open to the east and west with potential for two additional open pits.
Ethiopia and Tanzania are the focus forEast Africa Metals(TSXV: EAM; US-OTC: EFRMF) where the company has three advanced projects. In Ethiopia the companys 70%-owned Harvest and 100%-owned Adyabo copper and gold projects have mining licences and in Tanzania East Africa Metals 100%-owned Handeni project is a pure gold play.
The most advanced of these projects is Adyabo, where two mines the Malo Bula pit and underground and the Da Tambuk open pit are shovel-ready. Construction has been delayed until the Ethiopian government lifts its covid-19 travel bans. There will be a year of construction at both mines, according to the company, and together they are forecast to be mined at a rate to 300,000 tonnes per year.
The mill can be built in phases. The first will have a gravity-flotation flowsheet with anticipated recoveries of 70% for gold and 85% for copper. In the third year of operation, a carbon-in-leach (CIL) plant will be built to increase gold recovery to 90%, the company says.
At the Handeni property, a reprocessing operation for tailings from the artisanal Magambazi gold mine was commissioned earlier this year. The operator, PMM Mining, plans to produce 10,000 oz. gold in the first year of operation and 20,000 oz. in the second. Thirty percent of the output will be sold to East Africa at the price of production plus 15% with third party smelting, refining, transportation and royalties minus by-product credits.
At the Harvest property, East Africa has prepared a preliminary economic assessment for the Terakimti heap leach project in 2018. The study outlined a post-tax net present value of $13.2 million at an 8% discount rate and an internal rate of return of 30.1%. The Terakimti oxide resource has 1.1 million indicated tonnes grading 3.20 grams gold per tonne, 23.60 grams silver per tonne, and 0.08% copper. There are also 15,000 inferred tonnes grading 1.94 grams gold, 13.50 grams silver, and 0.04% copper.
The primary sulphide resource, recoverable first by open pit and then underground methods, contains 1.8 million tonnes grading 1.06 grams gold, 17.50 grams silver, 2.20% copper and 1.65% zinc. The open pit portion contains 2.6 million inferred tonnes grading 0.96 grams gold, 20.60 grams silver, 1.09% copper and 1.42% zinc; and the underground resource is 939,000 inferred tonnes at 0.84 grams gold, 15.20 grams silver, 0.69% copper, and 2.92% zinc. The property lies in the highly prospective Asmara mineral belt.
Readers who followEndeavour Mining(TSX: EDV; US-OTC: EDVMF) will know it as West Africas No.1 gold producer with 2020 output of 1.5 million oz. from eight mines: Hound (90% ownership), Boungou (90%), Mana (90%), Karma (90%), and Wahngion (90%) mines in Burkina Faso; the Sabodala-Massawa (90%) in Senegal; and the Ity mine in Cte dIvoire (85%). These producing mines are all solid performers that are increasing ore production and have exploration for future growth.
Endeavour is also pursuing a number of greenfield opportunities, the most advanced being the Fetekro (80%) gold project in Cte dIvoire. The prefeasibility study has been updated this year for a multi-million-ounce project. The latest update also proposes doubling the mill capacity, a change that would boost production by 76% to 209,000 oz. annually. A solar hybrid power plant is also planned.
Endeavour puts Fetekros proven and possible reserves at 31.9 million tonnes grading 2.07 grams gold. A three million-tonne per year plant would operate with that material for 9.5 years. A definitive feasibility study is due by the end of 2021.
The Kalana (80%) gold project has the potential to produce 150,000 oz. per year, according to the company. The reserve estimate was updated earlier this year to proven and probable reserve of 35.6 million tonnes grading 1.6 grams gold per tonne for 1.8 million oz. gold, enough to support a mine life of 11 years. Endeavour expects to complete a definitive feasibility study on Kalana in the first quarter of 2022.
Endeavours pipeline for future production holds a great deal of promise. Endeavour has earlier stage exploration projects in Burkina Faso (Bautou and Nabanga) and Cte dIvoire (Afema and, with Barrick Gold, Sissedougou-Mankono). It has additional exploration properties in Mali, Guinea, Niger and another in Burkina Faso.
Global Atomics (TSX: GLO; US-OTC: GLATF) flagship asset is the Dasa uranium project in Niger. The environmental impact statement has been submitted and approved and a mining permit was issued in December 2020. The current exploration permits have been extended until the end of 2023.
The Dasa deposit is sandstone hosted with several horizons ranging from Jurassic to Carboniferous in age. There are low levels of deleterious elements such as molybdenum or vanadium. Uranium recovery is expected to be well above 90%, the company says.
According to the preliminary economic assessment prepared a year ago, first phase of production would see the establishment of a mine with a 12-year life that would produce 44.1 million lb. uranium oxide (U3O8) with an average processed grade of 5,396 parts per million. Based on a uranium price of $35 per lb., the after-tax net present value at an 8% discount rate would be C$211 million for an after-tax internal rate of return of 26.6%. Estimated cash costs are $16.72 per lb. U3O8 and an all-in sustaining cost of $18.39 per lb. U3O8.
Global Atomic went to Process Research Ortec to pilot metallurgical tests in Canada last year. Samples representative of what will be treated during the first 20 months of mining were treated. Uranium oxide recovery was 92.8% after leaching during the first campaign, according to the company. The second campaign using samples representative of deeper ore, reached a recovery rate of 97.8%, and the third campaign with reduced use of acid recovered between 95.1% and 94.1% uranium.
Solvent extraction based on sodium carbonate stripping technology combined with a uranyl peroxide precipitation process resulted in near quantitative conversion of uranium from the leach into final yellow cake product, Global Atomic reported. The yellowcake was dried or calcined to produce UO4 or U3O8, respectively.
Global Atomic also holds a 49% stake in Befesa Silvermet in Turkey. The joint venture recovers zinc concentrate by recycling aluminum slag and steel dust. The companys share of production during 2020 was $1.0 million.
Namibia Critical Metals(TSXV: NMI; US-OTC: NMREF) first set its sights on Namibia in 2005 when it began exploring the Lofdal rare earth oxides (REOs) project, 450 km northwest of Windhoek. The project is interesting for its dysprosium and terbium mineralization as well as large amounts of yttrium.
In 2018, the company acquired a 95% interest in seven critical metals properties in the mountainous southeastern part of the country. A strategic partnership was struck with the former owner, Gecko Critical Metals (Pty), and shares issued to Gecko, making it the major shareholder of Namibia.
The Lofdal project is the most advanced of the companys holdings. A 43-101 resource estimate was completed in 2012. The deposit contains 2.9 million indicated tonnes grading 0.08% light REOs and 0.24% heavy REOs. There are 9,234 contained tonnes of REOs with HREO enrichment of 76.3%. The inferred material totals 3.9 million tonnes at 0.07 light REOs and 0.20% heavy REOs. This portion contains 8,973 tonnes of REOs with HREO enrichment of 74.7%.
A preliminary economic assessment was completed in 2014 for a mine and processing plant that would have an annual production of 1,500 tonnes of separate REOs. While soft rare earth prices have meant the project is not moving forward quickly, Namibia says there is potential to expand the current resources with more drilling.
The companys Epembe tantalum-niobium property in the northern part of the country covers a well-defined, very large multi-phase carbonatite dyke that has been mapped and surface sampled along 10 km 7 km of which is mineralized. The carbonatite contains variable amounts of pyrochlore, which is enriched with tantalum. There is also phosphate present. Only 15% of the dyke has been drilled with concentrations of 150 parts per million tantalum pentoxide, 1,300 ppm niobium pentoxide and 2.4% phosphate. Namibia intends to advance the project to the preliminary economic assessment stage.
Its Kunene cobalt-copper project is a new discovery in the northern part of Namibia. It covers an area of favourable stratigraphy along strike west of the Opuwo deposit belonging to Celcius Resources. The company plans to test several extensions of the dolomitic ore formation for sediment hosted cobalt and copper, orogenic copper and stratabound zinc-lead mineralization. Most of the occurrences, the company says, are likely related to what has been termed the Streilrand hydrothermal system. There are a number of historic copper-cobalt targets that have not previously been tested for cobalt to follow up.
In addition, the company has three other early stage projects in the country the Grootfontein nickel-copper-lead-zinc-vanadium-gold property, the Otjiwarongo rare earths and gold property, and the Erongo gold project. Airborne surveys have been flown over Grootfontein and Otjiwarongo, but Erongo has not been systematically explored.
Newcore Gold(TSXV: NCAU; US-OTC: NCAUF) is focusing its near-term energies on its 100%-owned Enchi gold project in Ghana, Africas number one gold producer. The deposits lie along one of West Africas most prolific and developed gold trends, the Bibiani gold belt. The Enchi project covers 216 sq. km along 40 km of the prolific Bibiani Shear zone, the setting of some of Ghanas most successful mines. Enchi lies in the Sefwi-Bibiani belt and Kinross Golds Chirano mine is about 50 km to the north.
The Enchi property covers several gold occurrences, including the known zones of Boin, Sewum and Nyam. Gold grades near the surface tend to be low, and drilling has only averaged 50 metres to date. No holes have been drilled to more than 200 metres. All the gold zones are open at depth.
In August 2020, an 8,000-metre reverse circulation (RC) drill program was started.The results and those of drilling done in 2017-18 allowed the company to file a 43-101-compliant report in October 2020, which outlined 1.2 million oz. of gold in the inferred category in 52.9 million tonnes grading 0.72 gram gold per tonne. The resource estimate used a cut-off grade of 0.30 gram gold per tonne.
The company has chosen several high priority gold targets that could expand the near surface oxide resources. As part of the expanded program, drilling this year will test extensions of defined deposits,retest previous holes that had no significant mineralization, and complete first pass drilling of anomalous zones on a 1-km-scale.
On April 28, Newcore increased its 2020-21 drill program to 66,000 metres, including an additional 8,000 metres of RC drilling. It also reported some recent assays from its Kojina Hill gold target, with highlights of 59 metres of 0.79 grams gold per tonne from 61 metres downhole, including 10 metres of 3.03 grams gold over 10 metres from 80 metres.
Other work planned for this year includes metallurgical testing, geotechnical assessments, and a detailed topographic survey. Existing anomalies and targets will also be trenched and sampled geochemically.