SU1418345A1 - Method of producing ferrotitanium - Google Patents

Abstract

The invention relates to metallurgy, specifically to the production of ferro-titanium alumina by the thermal process QOM. The aim of the invention is to increase the uptake of titanium waste by metal and increase the yield of ferrotitanium. To do this, together with titanium waste, aluminum is additionally deposited in the form of bits in relation to titanium waste 1: (0.01-0.18), then iron ore pellets and aluminum powder are melted and smelted the mixture, and the lime from its composition give the melt in the amount of 46.7-83.7% by weight of waste titanium. Due to the melting of the metal part of the mixture with an excess of reducing agent, the waste of titanium from waste is reduced, and the supply of lime to the melt in the specified amount contributes to the formation of the most favorable composition of waste slag, which allows to increase the extraction of titanium from 72.7% in the known method to 87 , 7%. The yield of ferrotitanium increases, respectively, from 45.7 to 51.4%. 1 tab. (/)

Description

The invention relates to metallurgy, specifically to the production of ferroalloys by an aluminothermic process.

The purpose of the invention is to turn the waste of titanium into metal and decrease the yield of ferrotitanium.

Together with titanium waste on the bottom of a metallurgical tank, aluminum is laid in the form of ingots in relation to waste 1: (0.01-0.18), then iron ore pellets and aluminum powder of the metal-thermal part of the charge are loaded and melted. in the amount of 46.7 - 83.7% by weight of titanium waste.

This ratio of metal titanium waste and pig aluminum allows for a slight temperature rise (up to 1240 ° C) in a metallurgical vessel to produce a series of stable and unstable intermetallics (TiAl, TiAl, TiaAl), the formation of which prevents titanium from the carbon. An increase in the aluminum content in the mixture of more than 0.18 leads to an increase in the specific consumption of aluminum in the smelting of ferrotitanium, and a decrease in less than 0.01 does not allow one to achieve the goal. In a mixture with iron, aluminum powder is taken in a stoichiometric ratio.

In case of separate penetration of the metallothermal part of the charge, the melting of titanium waste occurs with an excess of the reducing agent, which reduces the loss of titanium.

When lime consumption is less than 46.7% of the mass of titanium waste, an insufficient amount of lime slag is formed. As a result, the optimum composition of waste slag is obtained after melting the main part of the charge. The consumption of lime more than 83.7% impairs the properties of waste slag.

According to the proposed and known methods, ferrotitanium is obtained that meets the requirements of GOST, the following blend materials are used during smelting

materials: ilmenite concentrate,

Q 5

0 5

.

O

0

five

aluminum, ferrosilicon, iron ore, lime burnt hammer and titanium waste.

According to a known method, titanium waste is deposited on the bottom of the crucible, the metal-thermal part of the charge is loaded onto it and melted. Then on. the melt is fed and the main part of the charge is smelted, after which the metal and slag are released from the aggregate.

In the proposed method, together with titanium waste, aluminum is also laid in the form of ingots, a mixture of iron ore is loaded and smelted onto them. aluminum and aluminum powder, and lime is fed to the resulting melt. After loading lime process is conducted in a manner similar to the known method.

The composition of the parts of the mixture and the results are presented in the table.

Increasing the yield of ferrotitanium with a simultaneous decrease in the content of titanium oxide in the slag indicates a more complete utilization of titanium waste and its removal from the oxide portion of the charge.

Claims (1)

Invention Formula The method of producing ferrotitanium, including w; s, is the loading of metal titanium waste into the metallurgical reactor, the additive of the metal-thermal mixture and its penetration, the loading and penetration of the basic charge, the production of metal and slag, which is different assimilation of titanium waste by metal and delivery of ferrotitanium to the reactor together with titanium waste to-. additionally charge aluminum ingots in a ratio of 1: (0.01-0.18), respectively, and iron ore pellets and aluminum powder of the metallothermic part of the charge are loaded as the main charge, while lime is loaded onto the melt in the amount of 46.7-83, 7% by weight of titanium waste. Part 1: titanium waste (92% Ti) 800 720 320. 300 aluminum pig, secondary Part 2: iron ore trousers aluminum powder, second i lime Part 3: ilmenite concentrate (65% TiO) iron ore ferrosilicon lime aluminum powder waxy Total set, kg Received kg ferrotitanium slag (lime-clay) The chemical composition of ferrotitanium, wt.%: 5831 4649 4300 5500 5300 5440 titanium in IU composition % 84.0 The rest The rest The rest Output of ferrotitanium for smelting,% of specified charge materials 51.1 Table continuation 87.7 80.5 72.7 51.4 45.7 44.0