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Laterite gas gas reduction apparatus

A technology of laterite nickel ore and equipment, which is applied in the field of laterite ore gas-based reduction to achieve the effects of protecting the ecological environment, reducing production costs and saving energy

Inactive Publication Date: 2013-11-27
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current lateritic nickel ore smelting equipment still needs to be improved

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The composition will be NiO1.4%, Fe 2 o 3 65.2%, SiO 2 16.5%, Al 2 o 3 4.2%, CaO2.2%, MgO3.3%, Cr 2 o 3 2% and H 2 O5.5% limonite-type laterite and lignite with fixed carbon content of 60% and water were made into pellets at a ratio of 100:3:5, and dried in a belt dryer at 300 degrees Celsius . The raw coke oven gas and the dried pellets are separated by 700m 3 The / t pellets are supplied to the reduction shaft furnace, and the reduction reaction is carried out at the reduction heat equilibrium temperature of 1000 degrees Celsius.

[0062] After inspection, the Ni metal conversion rate of the obtained product is 85%, and the Fe metallization rate is 80%.

Embodiment 2

[0064] The composition will be NiO1.4%, Fe 2 o 3 65.2%, SiO 2 16.5%, Al 2 o 3 4.2%, CaO2.2%, MgO3.3%, Cr 2 o 3 2% and H 2 O5.5% limonite-type laterite, binder, lignite with fixed carbon content of 60%, and water were made into pellets at a ratio of 100:3:1.5:5, and were placed in a belt conveyor at a temperature of 400 degrees Celsius. Dry in a dryer. The raw coke oven gas and the dried pellets are separated by 700m 3 The / t pellets are supplied to the reduction shaft furnace, and the reduction reaction is carried out at the reduction heat equilibrium temperature of 1000 degrees Celsius.

[0065] After inspection, the Ni metal conversion rate of the obtained product is 87%, and the Fe metallization rate is 82%.

Embodiment 3

[0067] The composition will be Ni2%, Fe14%, SiO 2 48.5%, Al 2 o 3 1.5%, CaO0.8%, MgO25%, Cr 2 o 3 1% and H 2 O5.2% humus-type laterite ore, lignite with fixed carbon content of 60%, regulator and water are made into pellets at a ratio of 100:2:5:5, and are placed in a belt dryer at a temperature of 400 degrees Celsius to dry in. Combine coke oven waste gas and dried pellets at a distance of 500m 3 / t The pellets are supplied to the reduction shaft furnace, and the reduction reaction is carried out at the reduction heat equilibrium temperature of 1100 degrees Celsius.

[0068] After inspection, the Ni metal conversion rate of the obtained product is 90%, and the Fe metallization rate is 80%.

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Abstract

The invention discloses a laterite gas base reduction apparatus which comprises a pelletizing device, a reduction device and a coke furnace raw gas generator, wherein the pelletizing device is used for pelletizing laterite-nickel ore, binding agent, reduction coal and regulator; the reduction device is connected with the pelletizing device, and a reduction reaction chamber is defined in the reduction device so as to receive pellets from the pelletizing device; and the coke furnace raw gas generator is connected with the reduction device, and used for introducing coke furnace raw gas into the reduction reaction chamber. The laterite-nickel ore smelting apparatus disclosed by the embodiment of the invention can effectively smelt laterite-nickel ore to obtain ferronickel alloy by utilizing the coke furnace raw gas.

Description

technical field [0001] The invention relates to the field of metallurgy. In particular, the present invention relates to a laterite gas-based reduction method. Background technique [0002] Laterite nickel ore is one of the rare minerals. For a long time, due to the limitation of ore dressing and smelting technology and the high production cost, it has not been well developed and utilized, so that a large number of ore deposits (body) can be relatively well preserved. In recent years, with the development of smelting technology and the reduction of production costs, coupled with the increasing demand for nickel, laterite nickel ore has been developed and utilized increasingly, and has become the main source of nickel for industrial production in my country and even in the world. [0003] However, the current laterite nickel ore smelting equipment still needs to be improved. Contents of the invention [0004] The present invention aims to solve at least one of the technic...

Claims

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Application Information

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IPC IPC(8): C22B5/12C22B1/243C22B23/02
Inventor 马明生尉克俭卢笠渔孙海阔黎敏李曰荣
Owner CHINA ENFI ENGINEERING CORPORATION
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