Pre-reduction process of fine-grained titanium concentrate

Abstract

The invention belongs to the field of metallurgy, and particularly relates to a fine-grained titanium concentrate prereduction technology. The fine-grained titanium concentrate prereduction technology comprises the following steps: pretreating, burdening, preheating, carrying out roasting reduction and cooling. The metallization ratio of a titanium concentrate prereduction ingot manufactured by adopting the technology is above 60%. The ingot is put in an electric furnace, deeply reduced and molten; the melting time of the technology is shorter than that of a conventional technology, so that the energy consumption is greatly reduced, and meanwhile, the problem of large raw material loss and furnace dust discharge capacity caused by melting fine-grained titanium concentrate in the electric furnace is solved. The acid fusible titanium slag and blocky iron obtained by melting are high in TiO and Fe yield, and completely meet the requirements on follow-up melting and high-efficiency utilization.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a pre-reduction process of fine-grained titanium concentrate. Background technique [0002] Panzhihua City is rich in titanium resources. During the beneficiation process of titanium concentrate, a large amount of fine-grained titanium concentrate (titanium concentrate with a particle size of -200 mesh accounts for about 70% of the total mass) is produced. The grades of these fine-grained titanium concentrates are better, TiO 2 The content is about 46%, and the TFe content is about 32%. However, due to its small particle size, it is difficult to directly use it in the process of smelting high-titanium slag in large electric furnaces. Most of the raw materials will be discharged by the dust removal system, and the utilization rate is very low, resulting in waste of raw materials, and the amount of dust generated during smelting is large. [0003] In order to solve the above...

AI Technical Summary

Problems solved by technology

However, due to its small particle size, it is difficult to use it directly in the process of smelting high-titanium slag in large electric furnaces. Most of the raw materials will be discharged by the dust removal system, and the utilization rate is very low, resulting in waste of raw materials, and the amount of dust generated during smelting is large.

[0003] In order to solve the above problems, the fine-grained titanium concentrate is often pressed and cold-set into a furnace for smelting, but there are defects such as low molding rate, easy crushing, large equipment investment, and a lot of powder, and the added binder makes the The grade of titanium in the furnace is reduced, and the production cost is increased at the same time. The fine-grained titanium concentrate TiO 2 Yield is only around 70%

[0004] At present, in the smelting of vanadium-titanium magnetite concentrate, although the pre-reduction of the rotary hearth furnace is used to improve the TiO in the electric furnace smelting. 2 The yield is high, but the premise is that pre-reduction can only be carried out at a high temperature of 1350-1400°C after cold-setting molding, which has the disadvantages of high energy consumption and low metallization rate.