Method for preparing titanium carbide through carbon thermal reduction of titanium-contained blast furnace slag

Abstract

The invention belongs to the field of comprehensive utilization of metallurgical resources and specifically relates to a method for preparing titanium carbide through carbon thermal reduction of titanium-contained blast furnace slag. The method comprises the following processing steps: (1) fine grinding; (2) material mixing; (3) reduction; (4) cooling; (5) acid leaching; (6) standing stratification; (7) washing with water and drying, so as to obtain the titanium carbide finally. The method has the highlights that a boron-contained compound is added for carbon thermal reduction, and acid leaching and standing stratification are performed on a reduction material, so that calcium, magnesium, aluminum, silicon, ion and the like in titanium and furnace slag are separated. According to the method, the problems of low extraction rate of titanium, low comprehensive utilization rate of the resources and the like existing in comprehensive utilization of the titanium-contained blast furnace slagcurrently are solved; the method has the advantages of being simple in process and high in extraction rate of the titanium, being environmentally friendly and efficient, etc. The prepared titanium carbide has excellent properties of high temperature resistance, abrasion resistance, high hardness and the like, can be widely used in high-grade, precision and advanced industries of aerospace, abrasion resistant refractory materials, alloys and the like, and has huge economic benefits.

Description

technical field [0001] The invention belongs to the technical field of metallurgical engineering, in particular to a method for preparing titanium carbide by carbothermal reduction of titanium-containing blast furnace slag. Background technique [0002] Panxi vanadium-titanium magnetite is rich in iron, titanium, vanadium, chromium, cobalt, nickel, copper, manganese and other strategic resources. Currently, TiO 2 The proven reserves are nearly 900 million tons, accounting for 90.54% of my country's titanium resource reserves and 35.17% of the world's titanium resource reserves, ranking first in the country and third in the world. TiO in raw ore 2 The content of titanium is about 10%. After beneficiation, about 47% of titanium enters titanium concentrate, and nearly 53% of titanium enters iron concentrate. After the iron concentrate is smelted in the blast furnace, all the titanium resources in it enter the blast furnace slag, forming a titanium-containing blast furnace sl...

AI Technical Summary

Problems solved by technology

In order to make use of this precious resource, since the 1970s, relevant research and production units at home and abroad have carried out scientific and technological public relations on the extraction and utilization of titanium resources in Panzhihua Iron and Steel's high-titanium blast furnace slag. Although some achievements have been made, Mostly because the technology is not up to standard; or it is technically feasible, but the production capacity is too low, and the economic and social benefits are not high; or industrialization is feasible, but the added value of the product is too low and the market prospect is lacking; or it causes new environmental pollution, etc., titanium The extraction of resources and the comprehensive utilization of titanium-containing blast furnace slag have not been resolved

Comprehensive technology, economic and social benefits, market prospects, environmental protection and other major indicators, using mineral processing technology to separate titanium resources, can enrich titanium-containing minerals to a certain extent, but there are complex mineral processing processes, the introduction of mineral processing agents to produce solid and liquid waste, and mineral processing The product quality is not high and its reuse and other problems; using the fire method to extract titanium can prepare a variety of titanium-containing alloys, but it is prone to problems such as unstable alloy composition, substandard physical and mechanical properties, and narrow market application fields; wet method of titanium extraction It can effectively extract or enrich titanium resources, but this technology has problems such as long process flow, large amount of waste liquid and waste residue, poor environmental benefits, and low resource extraction utilization rate; for the utilization of blast furnace slag in the construction industry, Although the slag burden of some Panzhihua Iron and Steel slag yards has been reduced, this kind of utilization method is a rough and crazy utilization, which has serious waste of titanium resources, low added value of products, and low economic and social benefits.

[0004] In summary, the existing blast furnace slag titanium extraction process has the disadvantages of long process flow, many waste by-products, serious environmental pollution, and low resource extraction rate.

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