Method for gradient separation of titanium copper and titanium silicon from titaniferous slag through liquid copper cathode electrolysis

Abstract

The invention discloses a method for gradient separation of titanium copper and titanium silicon from titaniferous slag through liquid copper cathode electrolysis, and belongs to the field of electrochemical metallurgy. The method comprises the following steps of placing copper powder or copper blocks at the bottom of a crucible to serve as a cathode, and placing the titaniferous slag above the copper powder or the copper blocks to serve as an electrolyte, wherein an inert electrode or a graphite electrode serves as an anode; using high-melting-point metals such as molybdenum and tungsten as a conductive rod, and using silicon nitride, zirconium oxide and other materials as protective sleeves for wrapping; placing the crucible filled with the cathode and the electrolyte in a high-temperature furnace, and installing the anode and the conductive rod; and raising the furnace temperature to be 20 DEG C-100 DEG C higher than the melting point of the titaniferous slag, keeping the temperature for 0.5 h-2 h, lowering a cathode conductive rod and the anode, and carrying out direct current electrolysis. When the titanium ion activity in the titaniferous slag is 10%-60%, titanium-copper alloy can be obtained through direct current electrolysis; when the titanium ion activity in the titaniferous slag is 1%-10%, titanium-silicon alloy can be obtained through direct current electrolysis; and when the titanium ion activity in the titanium-containing slag is less than 1%, the electrolysis is stopped. According to the method disclosed by the invention, metallurgical secondary resources are comprehensively recycled through utilizing an electrochemical metallurgy method; and meanwhile, the operation is simple and the cost is low.

Description

technical field [0001] The invention relates to a method for stepwise separation of titanium-copper and titanium-silicon by liquid copper cathode electrolysis of titanium-containing slag, which belongs to the field of secondary comprehensive utilization of metallurgical resources and electrochemical metallurgy. Background technique [0002] The total amount of titanium resources in my country is 965 million tons, ranking first in the world, accounting for 38.85% of the world's proven reserves. However, most titanium resources exist in the form of composite ores such as ilmenite and vanadium-titanium magnetite, and anatase and rutile in the form of titanium dioxide only account for about 8%. The ilmenite and vanadium-titanium magnetite will be sent to iron smelting, and the titanium element will be enriched in the slag. The titanium dioxide content in these titanium-containing slags is more than 20%, and direct disposal will cause environmental pollution and waste of resource...

AI Technical Summary

Problems solved by technology

In this method, titanium oxide is used as the anode, the electronic conductivity is poor, and the efficiency is low, and after two electrolysis, the energy consumption and cost are high

[0004] Patent CN201611033596.0 discloses a method for electrolytically extracting titanium from titanium-containing slag. The electrolysis uses liquid iron or iron alloy as the cathode, graphite as the anode, and titanium-containing slag as the electrolyte for DC electrolysis. However, due to the titanium-containing slag The presence of silicon dioxide in the medium will make silicon preferentially enter the iron, and obtain a titanium alloy with a very low titanium content, and only one type of alloy can be produced, and the efficiency is low

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