Method for producing titanium carbide slag

Abstract

The invention provides a method for producing titanium carbide slag, comprising the steps of: heating raw material mixture containing first titanium-containing mineral, second titanium-containing mineral and pellets containing carbonaceous reducing agent and third titanium-containing mineral by a reactor; and leading the carbonaceous reducing agent to react with titanium oxides and iron oxides inthe first, the second and the third titanium-containing minerals to respectively generate titanium carbide and simple substance of iron. The method can improve the carburization effect of a carbonaceous reducing molten pool in the high temperature carbonization process, thus easily controlling the finishing point of smelting; in addition, the method also reduces abnormal furnace conditions such asfoaming slag, rising hearth, etc.

Description

technical field [0001] The invention relates to the field of titanium metallurgy, in particular to a method for producing titanium carbide slag from titanium-containing minerals. Background technique [0002] Regarding the recovery and utilization of titanium resources in titanium-containing minerals, high-temperature carbonization-low temperature chlorination to produce TiCl 4 Compared with other process routes (such as sulfuric acid leaching to produce titanium dioxide and scandium, electric furnace smelting to produce titanium-silicon alloy, etc.), the process has the advantages of short process flow, large processing capacity, and high yield of titanium extraction, and has good Research foundation and industrialization platform. Preparation of TiCl by High Temperature Carbonization-Low Temperature Chlorination 4 The process route is roughly as follows: TiO in titanium-containing blast furnace slag is treated at high temperature 2 Carry out carbonization to convert tit...

AI Technical Summary

Problems solved by technology

Due to titanium-containing blast furnace slag TiO 2 Low content (15% ~ 30%), the specific gravity is about 2.0g / cm 3 ~2.2g / cm 3 , the carbonaceous reducing agent has a small specific gravity (0.8g / cm 3 ~1.2g / cm 3 ), so the titanium-containing blast furnace slag cannot be effectively mixed with the carbonaceous reducing agent during the carbonization reaction, which makes the carburizing effect of the carbonaceous reduction molten pool poor during the high-temperature carbonization process, resulting in an uncontrollable smelting end point

When the smelting end point is uncontrollable, the time and process of adjusting the end point are prolonged, resulting in a substantial increase in smelting power consumption

[0004] In addition, the titanium-containing blast furnace slag is a typical short slag with a high melting point and poor fluidity. At the same time, the titanium carbide with a high melting point generated during the smelting process is dispersed in the molten pool and continuously enriched to the bottom of the furnace during the smelting process, resulting in Abnormal furnace conditions such as foamy slag and furnace bottom rise seriously affect slag discharge

Chinese patent CN101168801A discloses a foam slag control method in the reduction carbonization process of titanium-containing raw materials, but this method is not conducive to exerting the power of the electric furnace, and the smelting strength of the electric furnace is usually less than 50% of the rated power, which is not conducive to energy saving and large-scale production