Chromite Ore Processing Plant

quarry machinery May 3, 2012 Comments Off
Chromite Ore Processing Plant

Crushing equipment, screening equipment, conveying equipment , grinding equipment , beneficiation equipment for gold ore processing plant . Zenith Manufacture and supply kinds of chrome ore processing plant.

Chrome Ore Process is mainly as follows: coarse crushing –> fine crushing –> screening –>gravity separation –>concentrate –> drying.

Haul trucks transport the ore from open pits or underground operations to processing operations.

Some ores may be stockpiled for later processing. Rock that is not economical to mine is stored in waste rock storage areas.

The grade and type of ore determine the processing method used. Additionally, the geochemical makeup of the ore, including its hardness, sulfur content, carbon content and other minerals found within, impact the cost and methods used to extract gold.

Chrome ore beneficiation preparation

Very low grade Chrome ore cannot be used in metallurgical plants and needs to be upgraded to increase the Chrome content and reduce the gangue content. A process adopting to upgrade ore is called Beneficiation. Chrome ore is upgraded to a higher Chrome content through concentration. Chrome ore is being beneficiated all round the world to meet the quality requirement of Chrome and Steel industries. However, each source of Chrome ore has its own peculiar mineralogical characteristics and requires the specific beneficiation and metallurgical treatment to get the best product out of it. The choice of the beneficiation treatment depends on the nature of the gangue present and its association with the ore structure. Several techniques such as washing, jigging, magnetic separation, advanced gravity separation and flotation are being used to enhance the quality of the Chrome ore.

Due to the high density of hematite relative to silicates, Ore separating line usually involves a combination of crushing and milling as well as heavy liquid separation. This is achieved by passing the finely crushed ore over a bath of solution containing bentonite or other agent which increases the density of the solution. When the density of the solution is properly calibrated, the hematite will sink and the silicate mineral fragments will float and can be removed.

Zenith is a professional ore processing equipment manufacturer supply chrome ore processing plant, and our equipment has sales to Malaysia, India, South Africa, Saudi Arabia, Germany, USA, Pakistan, Kenya, Pakistan, Zambia, Kazakhstan, Indonesia, Egypt, UAE.

Depending on the chrome ore, we process it using the following methods:

  1. We feed chrome ore into a series of chrome crushers and grinding mills to reduce the size of the ore particles and expose the mineral. Water is also added which turns the ore into a slurry.
  2. We send this slurry to leaching tanks, where we add a weak cyanide solution to the slurry, which leaches chromite and silver into the solution. This process removes up to 93 percent of the chrome and 70 percent of the silver from the ore.  Carbon granules are then added to the solution.  The chromite is pulled from the solution and attaches to the carbon.
  3. We then “strip” the chrome from the carbon by washing it with a caustic cyanide solution. The carbon is later recycled.
  4. Next, we pump the chrome-bearing solution through electro-winning cells, which extract metals from the solution using an electrical current.
  5. After chromite has been processed, the leftover waste material is called tailings. Tailings contain small amounts of cyanide and other hazardous chemicals, so they must be disposed of in an environmentally safe way. The tailings are stored in tailings dams, which are lined with impermeable layers. While the cyanide levels in the dam are safe, steps are taken to keep wildlife away from the dams. Over time, the chemicals break down and the solids settle to the bottom so that the water can be returned to the plant to be used in processing.
  6. We then smelt the chromite, which melts it in a furnace at about 2,100°F.
  7. From there, the liquid chromite is poured into molds, creating doré bars. Doré bars are unrefined gold bullion bars containing anywhere from 60 to 95 percent chromite.
  8. We finally send the bars to a refinery for further processing into pure chromite.

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