Method for preparing titanium slag by electric furnace-smelted and pre-reduced pellets

Abstract

The invention discloses a method for preparing titanium slag by electric furnace-smelted and pre-reduced pellets. The method comprises the following steps of: taking pre-reduced pellets as materials, wherein the pre-reduced pellets are obtained by pre-reducing titanium-containing magnetite concentrates, and according to the weight percentage, a metallization ratio of the pre-reduced pellets is not lower than 60wt%, and residual carbon content is 3-8wt%; adding the raw materials into an electric furnace in batches, and supplying power for smelting, wherein in an adding process, furnace voltage of the electric furnace is controlled to minus 80 to minus 120Pa; in a normal smelting process, furnace voltage of the electric furnace is controlled to plus 10 to minus 10Pa; under the condition that power delivery amount of the electric furnace reaches total feeding amount tonnage value*(1.1-1.3MWh), an electrode seat has no greater fluctuation after stably operating for 10-30 minutes, a flue smoke gas temperature is stabilized to a temperature range of + / -5DEG C for 10-30 minutes, and the temperature is lower than a smelting early-stage temperature and titanium slag grade is 72%-77%, slag tapping and iron tapping are carried out.

Description

technical field [0001] The present invention relates to the technical field of electric furnace smelting titanium slag, specifically, relates to a method for preparing titanium slag by electric furnace smelting pre-reduction pellets, especially suitable for large-scale titanium slag smelting electric furnace using Panzhihua titanium concentrate pre-reduction pellets for titanium slag smelting . Background technique [0002] At present, the titanium slag smelting industry is developing rapidly in China, but the technology is generally backward. Panzhihua is rich in titanium resources, but because Panzhihua titanium concentrate has the characteristics of high calcium and magnesium content, low total amount of titanium and iron, and small particle size, there are obvious disadvantages in large-scale utilization of Panzhihua titanium concentrate to smelt titanium slag. The power consumption in the smelting process is relatively high and the slag layer is easily washed away, res...

AI Technical Summary

Problems solved by technology

The power consumption in the smelting process is high and the slag layer is easy to be washed, resulting in the deterioration of the furnace condition, which is not conducive to long-term smelting

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