A preparation process and system for producing high-grade titanium-rich material from ilmenite

Abstract

The invention discloses a preparation process and system for producing a high-grade titanium-rich material by utilizing ilmenite, and belongs to the field of chemical engineering and metallurgy. The preparation process comprises the following steps: putting ilmenite concentrate into a first rotary kiln, and then adding a reducing agent and a desulfurizing agent for primary reduction, so as to obtain a reduced material I; enabling tail gas to pass through high-temperature cyclone dust removal equipment, an oil-gas separator, a Roots blower and a gas holder in sequence, and finally, conveying reducing gas to a second rotary kiln; cooling the reduced material I, and then removing impurities through a screening machine and a magnetic separating machine, so as to obtain a pure uniform-particle-size ferrotitanium inlay; feeding the ferrotitanium inlay to the second rotary kiln for secondary reduction, so as to obtain a reduced material II; and cooling the reduced material II, and performingthe grinding-separating operation and the magnetic separating operation in sequence, so as to obtain an iron product and the titanium-rich material. The preparation process has no restriction on the selection of raw materials; the equipment failure rate is low; the treatment of tail gas is simple; the environment-friendly and energy-saving properties are achieved; the metallization rate of the obtained iron product reaches 98% or higher; the content of titanium dioxide in the titanium-rich material is higher than 90%; and the number of particle meshes and the density meet the product requirements.

Description

technical field [0001] The invention belongs to the field of chemical metallurgy, and in particular relates to a preparation process and system for producing high-grade titanium-rich material from ilmenite. Background technique [0002] At present, more than 90% of ilmenite in the world is used to produce titanium dioxide, about 4-5% of ilmenite is used to produce metal titanium, and the rest of ilmenite is used to manufacture welding electrodes, alloys, carbides, ceramics, glass and chemicals Wait. my country's titanium resource reserves are very rich, but the main ilmenite is very little rutile. my country's titanium ore is mainly mined and produced in Guangdong, Guangxi, Hainan, Yunnan and Panzhihua, Sichuan. The main product is ilmenite concentrate, and there is also a small amount of rutile concentrate. Due to the low grade of ilmenite concentrate, high-grade titanium-rich materials (high-titanium slag or artificial rutile) are usually obtained through enrichment trea...

AI Technical Summary

Problems solved by technology

This method is mature, but it has strict requirements for raw materials, the content of titanium dioxide needs to be >50%, the cost of equipment maintenance and repair is high, and the energy is coal, the exhaust gas treatment system is huge, and the investment and floor area are large.

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