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Nickel Iron Rotary Kiln/ Nickel Ore Rotary Kiln

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  • Sep 28, 2015  UTC+8
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  • Tags: rotary kilns

-Introduction of Laterite Nickel Ore

Laterite nickel ore resource is formed from nickel sulfide ore rock, after weathering, leaching, sedimentary into surface weathering crust deposit, and found in tropical countries within 30 degrees north and south of the equator line in the world, mainly concentrated in tropical, subtropical areas of the Pacific rim, mainly including: Cuba, Brazil of America, Indonesia and the Philippines of Southeast Asia, new caledonia, Papua New Guinea of Oceania Australia, etc.

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-Second, Structure of Laterite Nickel Ore Rotary Kiln 

Nickel ore rotary kilns consist of cylinder, rotating device, supporting device, kiln liner, kiln inlet, kiln seal and fuel device, etc. Kiln cylinder is heated rotating part, adopting winded welding of high quality carbon steel plate. The cylinder is supported by the tyre with different shifts equipped with mechanical or hydraulic type, so as to control the axial rotation of cylinder. Driving devices work through gear in the middle part so as to control speed of cylinder according to technological requirements. Due to need of installation and maintenance, large nickel rotary kiln body will rotate at very low speed. To prevent cold air into the dust and dust overflows from cylinder, the reliable seal devices of kiln inlet and outlet will be equipped.  

-Three, Strengths of Rotary Kiln for Laterite Nickel Ore Structure

(1) The main energy is coal, [1] rather than expensive coke or electricity.

(2) Free choice of raw material, various laterite nickel ores available in Southeast Asia.

(3)High quality nickel and iron (including about Ni 20 %), can be directly used for the production of stainless steel. 

(4)Meanwhile it can be used as a coolant when melting steel.

-Four, Smelting Method and Process of Laterite Nickel Ore Rotary Kiln 

Preprocessing step is to mix the ground laterite nickel ore with carbon materials and flux limestone straightly, then feed them into the rotary kiln continously. The burnt material from rotary kiln will be for water treatment. The gravity concentration and magnetic separation will recover nickel and iron from the discharge. The nickel and iron separated is 2~3 mm in diameter like sand particles, and 1 ~ 2% slag entrainment with chemical composition is C0.1 %, Ni18 ~ 22%, S0.45 %, P0.015 %.