A process for continuous smelting of ferro-titanium alloy

Abstract

The invention designs a process for continuously smelting ferro-titanium alloys, which belongs to the field of ferroalloys. Through the titanium-iron alloy and slag discharge design of the large furnace, a heating device is added at the bottom of the furnace body to realize the heating of the lower part. At the same time, a gas preheating pipeline is set up to heat the reaction gas, and a circulating air pipeline is set up. After the air is heated in the pipeline, it participates in the reaction, which can improve the reaction efficiency and increase the yield of ferro-titanium. The reaction heat of the reduction reaction is used to realize the preheating and ignition of the reactants, and the heating device is installed in the middle and lower layers of the furnace body, which effectively solves the problem of low yield of ferro-titanium alloy without adding slagging agent. The invention utilizes the thermal radiation of the aluminothermic reaction to realize preheating and ignition during the falling process of raw materials, simplifies the production process and realizes energy saving and environmental protection. Effectively reduce production costs and increase economic benefits.

Description

technical field [0001] The invention relates to a process for continuously smelting ferro-titanium alloys, in particular to a process for smelting ferro-titanium alloys, belonging to the field of metallurgy. Background technique [0002] The smelting of ferro-titanium alloy is based on titanium-containing ore as raw material, and metal aluminum, silicon, or carbon as reducing agent. Among them, the affinity between silicon and titanium and oxygen is similar, and the smelting is difficult. Using carbon as reducing agent will form a high melting point inclusion TiC, so Thermite reduction is the most commonly used option. The industrial production process of aluminothermic reduction smelting titanium-ferro alloy is generally as follows: ilmenite is mixed with metal aluminum after preheating, then self-propagating reaction is carried out in the reaction bag, and after the reaction is completed, the alloy and slag are cooled and separated. During the reduction process, substance...

AI Technical Summary

Problems solved by technology

There are several ways to increase the reaction temperature. One is to increase the content of reducing agent metal aluminum, but it will increase the cost and easily lead to excessive aluminum content in the alloy.

The second is to insert a graphite electrode into the slag layer to increase the heat source, but the heat radiation provided by the graphite electrode is limited, and it needs to be stirred to ensure uniform heating. For a high-viscosity slag layer, stirring is not conducive to the separation of slag and iron, and the introduction of carbon cannot be avoided.

Images