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china mining equipments manufacturer, minerals processing equipments, crushing machine supplier - gongyi hengchang metallurgical building material equipments plant

china mining equipments manufacturer, minerals processing equipments, crushing machine supplier - gongyi hengchang metallurgical building material equipments plant

Mining Equipments, Crushing Machine, Drying Machine manufacturer / supplier in China, offering PE/Pex Series 200 Tph Stone Jaw Crusher Machine, Multi-Layer Carbon Steel Aggregate River Stone Screen, Small Mini Jaw Crusher PE150*250 and so on.

Gongyi Hengchang Metallurgical Building Material Equipments plant is a professional manufacturer of complete set mineral beneficiation equipments, Briquette equipments, coal preparation equipments, ball press equipments, products widely used in mineral processing, metallurgy, building materials, chemicals, electricity, petroleum, coal, transportation, fertilizer, gas industry etc. In the last two decades, we always persist on the philosophy of "scientific and technological innovation, quality first, ...

productive froth flotation technology | flsmidth

productive froth flotation technology | flsmidth

There are many factors that can affect your flotation process. The two aspects that have the strongest impact on a flotation circuits efficiency and performance are metallurgical recovery and flotation cell availability. Fluctuations in feed characteristics can lead to recovery losses. The inability to handle changes in feed size and mineralogy can result in the loss of availability. At FLSmidth, we have developed solutions to these challenges and more.

Every project we take on is engineered to fit your operation, regardless of the size. Our expert solutions range from equipment only to the entire flotation island, including all auxiliary equipment (tanks, pumps, piping, blowers, etc.). Regardless of the project scope, our selection of flotation machines comes equipped with a range of drives, dart valves and automation options.

We have proven the metallurgical superiority of our flotation machines time and again in side-by-side comparative tests conducted by major mining companies. Results show that our flotation machines operate on exceptional grade recovery curves, with respect to coarse and fine particle recovery. The remarkable performance of our machines is related to flotation-favourable hydrodynamics, which produce higher active cell volumes, provide longer residence times, and complement froth removal.

The test of time has proven, as well, that competing equipment cannot match the availability of our flotation machines. The rotor-stator/disperser combinations in our redesigned forced-air (nextSTEP) and self-aspirated (WEMCO) flotation machines provide longer lifespan. In addition, using patented bypass equipment, our flotation mechanisms can be serviced or removed for maintenance without process interruption. This allows for longer production between wear parts replacement, and minimises the threat of maintenance cutting down on availability or even loss due to failure.

FLSmidth supplies two types of flotation machines: WEMCO and nextSTEP. The WEMCO machine is self-aerating, whereas the nextSTEP machine is externally aerated (forced-air). While the principles of operation for self-aerated and forced-air machines are similar in concept, the execution is different.

The main differences of execution are energy input location (via rotor placement), aeration mode and control. The WEMCO rotor is located at top of the cell, and the nextSTEP rotor is placed at the bottom of the machine. The rotor placement creates different flow patterns within the cell, which affects froth recovery. When it comes to aeration of the cells, WEMCO machines draw in and use air without the use of an external blower. They also are self-controlled, and do not require constant monitoring from an operator or moderation of air control valves. The nextSTEP requires an external blower and air flow controls to maintain proper operation.

We use a continuous process improvement program to both develop new flotation equipment and improve the performance of our existing flotation products, including validated computational fluid dynamics (CFD). CFD models help to analyse hydrodynamics inside the machine. The results help in gaining understanding of the regions of energy dissipation and quiescent zones. They also allow prediction of stress and vibration forces on impellers and stators. CFD analysis is always part of new product development in conjunction with engineering analysis, laboratory and pilot plant testing, combined with industrial application.

A flotation circuits performance is affected by both pulp and froth phase recovery. And it is inherent in mining operations that manual control by operators who look at the cell surface periodically and then take action does not really maintain stable operating conditions. Our ECS/FrothVision automation system is designed specifically to analyse froth characteristics in flotation. Comprising all necessary hardware and software to conduct froth image analysis and report information on bubble size, bubble count, froth colouranalysis, froth stability, froth texture and froth velocity, ECS/FrothVision handily assists in the process control and allows optimisation of the entire flotation circuit.

FLSmidth supplies two types of flotation machines: WEMCO and nextSTEP, the WEMCO machine is self-aerating whereas the nextSTEP machine is externally aerated. The principles of operation for self-aerated and forced-air machines are similar in concept, but the execution is different.

The main differences of execution are energy input location (via rotor placement) and aeration mode and control. The rotor of the WEMCO is at top of the cell while the nextSTEP is at the bottom of the machine. The rotor placement creates different flow patterns within the cell which affects froth recovery. When it comes to aeration of the cells, WEMCO machines draw in and use air without the use of an external blower. They are also self-controlled and do not require constant monitoring from an operator or moderation of air control valves. The nextSTEP requires an external blower and air flow controls to maintain proper operation.

FLSmidth provides sustainable productivity to the global mining and cement industries. We deliver market-leading engineering, equipment and service solutions that enable our customers to improve performance, drive down costs and reduce environmental impact. Our operations span the globe and we are close to 10,200 employees, present in more than 60 countries. In 2020, FLSmidth generated revenue of DKK 16.4 billion. MissionZero is our sustainability ambition towards zero emissions in mining and cement by 2030.

forced-air flotation cell | flsmidth

forced-air flotation cell | flsmidth

Flotation is about creating the proper energy dissipation rate in the cells to obtain optimal contact between the air bubbles and the particles for extracting the minerals. The function of the rotor/stator is to make bubbles from the forced air, suspend the particles, and create an environment for bubbles and particles to make contact and rise to the top as froth for concentration and collection.

Our forced-air flotation design features a streamlined, high-efficiency rotor that works as a very powerful pump. Working together the stator, these components generate an energy-intensive turbulence zone in the bottom of the cell. The forced-air design allows for control of the air flow. The well-defined turbulence zone results in multiple passes of unattached particles through the highest energy dissipation area of the cell where fine particles are driven into contact with the air bubbles.

The stator design, in addition to providing good separation of the cell zones, also serves to redirect the rotor jet uniformly across the tank. This allows dispersion, or distribution, of the maximum amount of air into the cell without disturbing the surface an important consideration for fine particle recovery. The air dispersion capabilities of our Dorr-Oliver cell design exceed all competitive forced-air designs.

By containing the intense circulation energy at the bottom of the cell, the upper zones of the cell remain quiescent, or passive, to maximise recovery of marginally attached coarse particles and minimise the carriage of undesired material.

We have equipped our forced-air flotation tank cells with a uniquely designed, high-efficiency radial launder system that accelerates froth removal as it reaches the surface. Bubble-particle aggregates travel vertically through the froth lattice. The high-efficiency radial launder is shaped to receive the froth uniformly from the cell surface, as well as from the typically heavy-loaded area near the centre of a forced-air machine. On passing over the lip, the froth accelerates to the perimeter of the cell. This unique design rarely requires launder water.

The two factors having the strongest impact on a flotation circuits performance are metallurgical recovery and flotation cell availability. Our forced-air flotation machines provide superior performance in both of these important areas, while offering additional, distinct advantages.

Superior metallurgical performance: Intense recirculation in a well-defined mixing zone multiplies the chances of contact between mineral particles and air bubbles, providing for greater mineral recoveries and higher concentrate grades.

Greater availability: Non-clogging design of the rotor reduces maintenance requirements, minimising failure, and increases availability. Our flotation mechanisms also can be removed for maintenance without process interruption.

Low reagent costs: Air is a natural reagent in the flotation process. Having a wide air dispersion capability permits you to fine-tune your flotation plant to deliver the optimum value for your process.

FLSmidth provides sustainable productivity to the global mining and cement industries. We deliver market-leading engineering, equipment and service solutions that enable our customers to improve performance, drive down costs and reduce environmental impact. Our operations span the globe and we are close to 10,200 employees, present in more than 60 countries. In 2020, FLSmidth generated revenue of DKK 16.4 billion. MissionZero is our sustainability ambition towards zero emissions in mining and cement by 2030.

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