Chrome Ore Crushing Process

Chrome ore process

While many minerals contain chromium, chromite (FeCr 2O4) is the only commercial ore mineral. Chromite has several industrial end uses, primarily based on its Cr: Fe content. High chromium ores (defined by having high Cr: Fe ratios) are used for producing ferro-chromium for metallurgical applications such as stainless steel (the most important application by volume (85%) and special uses (superalloys, special steels, plating). High iron chromitites are being used for the production of low quality ferro chromium, foundry sands, chromium salts (used in the leather tanning industry, as a pigment and in chromium plating) and refractory purposes (production of magnesite-chromite and chromite-magnesite bricks). South Africa, Kazakhstan and Turkey are the world’s largest producers of chromite ore.

Semi mechanized Chrome ore process

Semi Mechanized through Double Deck vibrating screen fitted on Pre-washing Tank and Drum Stirer and Mechanized Process will be adopted in the proposed project.

Chrome ore crushing

Pre-wash Tank:

Nearly 50 to 60% of the ore consists of chrome fines including agglomerates put on a 10 mm & 3 mm Vibrating Screen (Double Deck) fitted on the pre-washed tank will be washed by water spray. -3mm ore (fines) along with gangue materials settle in the tank and the over sized materials on the screen will be removed manually. It is a continuous process. When the ore with gangue materials come in contact with water, it becomes tank and some ore with agglomerates flow and settle on the way till reaches the end of the tank. Around 60-70% of the material will be processed in this manner and will be taken and stacked in the finished product yard for subsequent dispatch.

Drum Stire:

Around 25-30% mixed materials collected from pre-washed tank again washed in the Drum Stirer by mixing chemicals with water for separating the gangue materials from the ore (fines). By implementing this method the chrome contains in the solid waste will be around 2 to 3 % and the recovery of the pri me materials can be enhanced. Through both the process, the silica content can be controlled up to 5% if also required can be restricted as per the market demand. By implementing this Semi Mechanized & Drum Stirer system, one can produce around 1000-1500 T of finished ore per month. If the recovery of the materials from the Chrome Dump will be around 60-70%. The produced specification of the finished product will be 48-50% grade Cr2O3 and silica content will be 5-6%. The above grade can be up-graded as per the market demand.

Semi Mechanized chrome ore  process

The overall ore characteristics require through dispersal of the ferruginous coating on the chromite and gangue materials. It is therefore essential through scrubbing & Hydro classification, ore to be suitably Page 1/2PR Log – Global Press Release Distribution designed after screening the over sized materials, which is +100 mm to (-) 20 mm size.

Chrome ore scrubbing & desliming

Nearly 60-70% of the ore consists of chrome fines including agglomerates, which requires thorough scrubbing for removal of ferruginous coating on them. Hence, it is concerted to use one drum type scrubber with a partial overflow lip for removal of slimes.

After scrubbing (-) 20mm and (+) 3 mm materials are screened out. (-) 20 mm materials are collected in the form of slurry through a slurry pump, which is fed to Hydrocyclone. In the Hydro-Cyclone. Lighter particles are separated from the fines (chrome) and its become chrome concentrate. The tailing ore collected through pipe line to a pond 5 where it gets settled. And the clear water will over flow to another pond for recirculation in the process.