Production process of modem blast furnace nickel smelting for nickel concentrate

Abstract

The invention provides a process of producing modern blast furnace nickel smelting with nickel ore concentrate, The process comprises the following steps of: selecting nickel ore concentrate which comprises sulfuration nickel ore, nickel limonite ore and secondary paragenetic ore, and nickel-containing byproduct tailings of main metal mineral processing such as copper, molybdenum, zinc, arsenic and so on; mixing the nickel ore concentrate to obtain mixed ore, the weight percentages of each component of the mixed ore are: Ni=8.5 percent +- 0.5 percent, Fe=30 percent +-0.5 percent, and SiO2=8.5 percent +-0.5 percent; adding the following ingredients into the mixed ore, the ingredients comprise calcareousness CaO, washing head coal, bentonite, manganese slag and hot water; mixing the materials to granulate to obtain sintered materials; sintering, crushing and screening the sintered materials to obtain sintered ore; packing respectively the sintered ore and metallurgical coke with 3.6:1 of the weight proportion into the blast furnace to smelt into nickel pig iron; and carrying out de-C, de-Si, de-P, de-S treatment to the nickel pig iron through a revolving furnace to obtain ferronickel products. The process has the characteristics of less slag quantity, high nickel content, energy economization and emission reduction as well as various minerals.

Description

technical field [0001] The invention relates to a blast furnace smelting process, in particular to a modern blast furnace nickel smelting production process of nickel concentrate. Background technique [0002] Nickel has three oxides: NiO, Ni 3 o 4 and Ni 2 o 3 , exists stably in the form of NiO and forms a variety of salts; nickel has four sulfides: NiS, Ni 6 o 5 、Ni 3 S 2 and NiS; nickel has two arsenides: NiAs and NiAs 2 The main minerals of the above-mentioned nickel compounds are nickel-containing limonite, pentlandite, nickel-phosphopyrite, axenite, ferro-nickelite and arsenic-nickelite, and secondary minerals composed of nickel and iron oxides. Paragenetic minerals; in addition, there are companions with metallic minerals such as zinc, lead, molybdenum, copper, titanium, and platinum group, and companions with non-metallic minerals such as feldspar, graphite, and talc. [0003] At present, nickel metallurgy methods are divided into two categories: pyrometallu...

AI Technical Summary

Problems solved by technology

[0008] The above technologies all show that the existing nickel resources are extremely tight, and the mineral resources that can be used to smelt nickel are scarce. Moreover, in the prior art, the smelting process cannot carry out mixed smelting of many different types of nickel-containing minerals, and there are nickel deposits after smelting. Low content, large amount of slag, high energy consumption and other problems, people have been looking for an ideal technical solution to these problems

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