Process and device for preparing chromium iron by using chromium ore powder

Abstract

The invention relates to a process and a device for preparing chromium iron by using chromium ore powder, which belongs to metallurgical industry steel-making raw material. The process comprises the following steps: mixing chromium iron containing raw materials with reducing agent, solvent and catalyst to prepare ultra fine powder, mixing to make pelletizing materials, sending the pelletizing materials into a reducing furnace, drying and roasting, and obtaining chromium irons after the reduction reaction. The reducing device is connected with an upper furnace above a furnace base, a lower furnace body is connected to the downside of the furnace base, the upper end of the upper furnace body is connected with an upper furnace mantle, a drying bed grate is positioned at the upper end in the upper furnace body, a purifying device is connected with the upper furnace body and the lower furnace body through pipelines, and a residual heat circulating device is connected with the lower furnace body. The invention has the advantages that: firstly, the reduction temperature is low, the reduction speed is high, the energy consumption is reduced, the production cost is lowered, the production efficiency is high, and the uniformity of the quality is ensured; secondly, the device is simple with less investment, the degree of mechanization is high, the procedure is simple, the yield is large, the mass production can be performed; thirdly, the waste of raw materials is reduced, the environment pollution is lowered; fourthly, the cost is low because the chromium ore powder and chromium-containing waste are adopted as raw materials; and fifthly, the waste resource can be recycled so as to save the resource consumption.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a process for preparing ferrochrome from chrome ore powder and equipment for realizing the process. technical background [0002] Ferrochrome is an iron alloy mainly composed of chromium and iron. It is an important raw material for the iron and steel industry. It has good corrosion resistance, high temperature resistance, wear resistance, and improvement of the physical, chemical, mechanical properties and quality of steel and castings. And improve, so that the steel has a high use value. Due to its good properties, it is widely used in high temperature alloys, corrosion-resistant alloys, special steels, high alloy steels, high-quality alloy steels, metal wear-resistant materials, foundry industry, non-ferrous metal industry, chemical industry and stainless steel and other fields. . Especially in the field of stainless steel, the application amount is greater, because sta...

AI Technical Summary

Problems solved by technology

However, the preparation cost of H2 is expensive, and the primary utilization rate of H2 is only about 25%, the energy consumption per ton of iron is high, and it is still difficult to prepare micro-nano powder in large quantities in industry, and the preparation cost is high. Under the current conditions, there is no industrial application yet, and this achievement is only used for the reduction of iron, and has not been used for the reduction of ferrochromium.

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