Method for metallurgic smelting reduction recovery of titanium-contained mixed slag

Abstract

The invention discloses a method for metallurgic smelting reduction recovery of titanium-contained mixed slag, and belongs to the field of non-blast furnace iron refining and resource comprehensive utilization. The method comprises the following steps: 1) molten-state vanadium-contained slag and molten-state steel slag are added in an insulation device or a smelting reaction device capable of flowing out slag liquid, and are mixed to form reaction mixed slag; the reaction mixed slag is monitored in real time; the following conditions are synchronously guaranteed through control: (a) the temperature of the reaction mixed slag is in a set range; (b) the reaction mixed slag realizes full stirring; and (c) in the reaction mixed slag, the mass concentration of FeO is not more than 1.0%; in the reaction mixed slag, when the mass concentration of FeO is not more than 1.0%, the operation in the step 1 is stopped, and the slag after reduction oxidation is obtained; and 2) the separation and the recovery are performed. The recovery rate of metal ion in the method is 92-96%; the whole process needs no or low heat compensation; the operability is high; the production cost is low; no solid waste is generated in the whole process; the reaction conditions are mild; the energy conservation and the emission reduction are realized; and the method is a green metallurgy process.

Description

technical field [0001] The invention belongs to the field of non-blast furnace ironmaking and resource comprehensive utilization, and in particular relates to a method for metallurgical smelting reduction recovery of titanium-containing mixed slag. Background technique [0002] Titanium-containing blast furnace slag is produced in the blast furnace ironmaking process of vanadium-titanium magnetite, and its TiO 2 The content of vanadium-containing pig iron is 4-8%, the content of vanadium pentoxide is 0.1-0.5%, and contains chromium, gallium, scandium and other valuable elements. Titanium-containing blast furnace slag is an important secondary Secondary resources; the temperature of the titanium-containing blast furnace slag released from the blast furnace is higher than or equal to 1300 ° C, and a large amount of physical heat is emitted every year. Therefore, the titanium-containing blast furnace slag is also an important physical heat resource. [0003] Titanium-containin...

AI Technical Summary

Problems solved by technology

The method has short reaction time, high metal recovery rate, low production cost, strong raw material adaptability, large processing capacity, environmental friendliness, high economic returns, and can effectively solve the problems of environmental pollution, metallurgical resources and efficient recovery and utilization of heat energy. The new process of slag metallurgy, a new smelting reduction process, is the perfection and innovation of the existing metallurgical process. It is the first time in the world to develop a slag metallurgical process. The slag is not a waste, but a metallurgical intermediate product