Method of producing Ni-Cr agglomerate with Ni-Cr ore and industrial Ni-Cr waste

A technology for industrial waste and sinter, which is applied in the field of nickel-chromium sinter production, can solve problems such as non-renewable energy waste, and achieve the effects of reducing coke ratio, reducing cost and increasing output

Inactive Publication Date: 2006-10-18
DONGDA CASTING WUJIANG
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Problems solved by technology

They cannot be smelted directly into blast furnaces and turned into waste, which is a big waste for non-renewable energy

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0018] Nickel-chromium ore: During the mining process of nickel-iron ore, the surface layer is 1 to 3 meters. Due to the low Ni content and high Fe content, it cannot meet the requirements of the nickel extraction process, so it is discarded as tailings. These discarded ores can be used as raw materials for smelting nickel-chromium-iron alloy (stainless steel mother liquor). The composition weight content of the nickel-chrome ore is: iron: 50.4%; ferrous oxide: 1.03%; nickel: 0.96%; chromium: 2.21%; sulfur: 0.022%; Silicon oxide: 6.48%; Calcium oxide: 2.46%; Magnesium oxide: 1.33%; Aluminum oxide: 3.68%.

[0019] Stainless steel rolling skin: iron scale (rolling steel skin) in the stainless steel rolling process. It contains recyclable precious Ni and Cr resources, high iron content, and low other harmful impurities. It is an ideal raw material for addition.

[0020] The composition weight content of the stainless steel rolling skin is: iron: 54%; iron oxide: 2.57%; sulfur: ...

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Abstract

The method of producing Ni-Cr agglomerate for smelting Ni-Cr-Fe alloy in blast furnace with Ni-Cr ore and industrial Ni-Cr waste includes mixing industrial Ni-Cr waste, Ni-Cr ore of granularity smaller than 10 mm, flux, coke powder and water in the first mixer; pelletizing the mixture in the second mixer; sintering the pellet in a sintering bogie, and sieving to obtain Ni-Cr agglomerate and returned material. The produced Ni-Cr agglomerate is used for smelting Ni-Cr-Fe alloy in blast furnace together with other material.

Description

technical field [0001] The invention belongs to the technical field of raw materials for smelting nickel-chromium-iron alloys in blast furnaces, and in particular relates to a method for producing nickel-chromium sintered ore with nickel-chromium ore and nickel-chromium industrial waste. Background technique [0002] So far, nickel-chromium industrial wastes such as extremely fine-grained dust and tailings after wet leaching nickel produced in the stainless steel smelting process have caused serious environmental pollution due to the inability to utilize a large amount of waste. And the precious nickel-chromium resources are also discarded and cannot be utilized. Some nickel-chromium ore and nickel-chromium industrial waste are powders with a particle size of less than 10mm, and some (such as stainless steel soot, nickel extraction, and chromium tailings) have a particle size of less than 200 mesh. They cannot be smelted directly into the bl...

Claims

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Application Information

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IPC IPC(8): C22B1/14C22B1/248
Inventor 金连荣张兴华金学文
Owner DONGDA CASTING WUJIANG
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