Method for sintering chromite powder recycled based on ferronickel smelting furnace slag

Abstract

The invention provides a method for sintering chromite powder recycled based on ferronickel smelting furnace slag. According to the method, the chromite powder is added with the ferronickel smelting furnace slag and then is granulated and sintered, so that the sintering temperature of the chromite can be reduced, the liquid phase amount is increased, the carbon proportion can be decreased, the yield and the strength of the sintered ore are improved, the difficult chromite powder sintering problem is solved, the energy consumption for the production is reduced simultaneously, an expensive solvent is unnecessary, and the obtained sintered product is a nickel-chromium-iron alloy which can be directly applied to the stainless steel production and does not increase a subsequent smelting slag discharge process of the stainless steel production. Compared with the chromite sintering process in the prior art, the method has the advantages that the coke proportion is low, the sintering temperature is low, the quality of the sintered ore is high, the ferronickel smelting furnace slag is effectively recycled and the production cost is low, the waste utilization in the nickel alloy production process is realized, the total cost of the stainless steel production is reduced, the economic benefit of enterprises is increased, and the energy conservation and emission reduction pressure of the enterprises is relieved.

Description

technical field [0001] The invention relates to the fields of metallurgical engineering technology and environmental protection and energy saving technology, in particular to a sintering treatment method for chromite powder ore based on recovery of ferronickel smelting slag. Background technique [0002] my country's steel production ranks first in the world, and the demand and production capacity of stainless steel have also increased significantly. At present, about 65% to 70% of the stainless steel used in the world is austenitic stainless steel. Chromium-nickel stainless steel accounts for two-thirds of the world's stainless steel production. In order to ensure the inherent corrosion resistance of stainless steel, the steel must contain more than 16% chromium and more than 8% nickel. Chromium and nickel are the basic additions for the production of stainless steel. my country needs to produce a large amount of ferrochrome and ferronickel every year. Since my country'...

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Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a sintering treatment method for chromite fines based on ferronickel smelting slag recovery, which improves the sintering effect of chromite fines, reduces carbon consumption, and reduces energy consumption. consumption, in order to solve the problem of high energy consumption in sintering of chromite fine ore in the prior art, which is not conducive to energy saving and emission reduction

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