Method for producing titanium and steel products by utilizing titanium and iron ores

Abstract

The invention discloses a method for producing titanium and steel products by utilizing titanium and iron ores, which belongs to the field of technical innovation of mining, dressing and smelting full process flow of the titanium and iron ores. Ordinary blast furnaces are not suitable for the smelting of high-titanium and medium-titanium schreyerite; and schreyerite mining, dressing and smelting enterprises in Panxi region extract rich parts and discard poor parts, and discard weathered ore of submarginal ore which accounts for over 95 percent of that of raw ore and is taken as mining mullock. The method comprises the following step: directly reducing titaniferous iron concentrate dressed from the mining mullock (TiO2 is over 5 percent, and TFe is over 13 percent) of the schreyerite, electric furnace melt producing titanium slag and molten water with electric furnace melt components, and producing a titanium-rich material and rutile with the titanium slag through mineral dressing by a fire method; producing alloy molten iron with the molten iron through electric smelting and vanadium-chrome steel slag blowing; and producing various alloy steel products the alloy molten iron in a continuous casting and continuous rolling mode through the electric smelting. The recovery rates of titanium, iron and vanadium are improved to 80 percent from 3.86 percent, improved to 70 percent from 34.5 percent and improved to 70 percent from 20.90 percent respectively.

Description

technical field [0001] The invention belongs to ilmenite concentrate, vanadium ilmenite concentrate, titanium concentrate and titanium sand separated by magmatic (primary) ilmenite deposits (two primary ilmenite deposits of magnetite ilmenite and hematite ilmenite) Methods of beneficiation and metallurgy of ilmenite concentrate metal minerals for separation of ore deposits (two types of titanium placer deposits, ilmenite placer and rutile placer deposits), especially methods for separation of iron-containing minerals such as ilmenite or magnetite Titanium, iron concentrate (TiO 2 58% to 0%, Fe 68% to 0%) direct reduction method to produce titanium-rich material and alloy steel. Background technique [0002] Titanium is an extremely important metal raw material for modern industry. The appearance is silvery white slightly like steel. Titanium and its alloys have excellent properties such as low density, high strength, high temperature resistance, low temperature resistanc...

AI Technical Summary

Problems solved by technology

[0033] (2) Ferro-titanium separation, the selected vanadium-titanium iron concentrate is smelted in ordinary blast furnaces, and TiO in blast furnace slag 2 >22%~24%, more than 600,000 tons of TiO per year 2 no recycling

[0035] (4) The amount of resources wasted by Panzhihua Steel to produce one ton of iron (Fe) by using vanadium-titanium ore: 1.02 tons of TiO 2 , 1.9 tons of Fe, 0.021 tons of V 2 o 5 , other valuable elements in vanadium-titanium ore are not recycled

[0072] Panzhihua Iron and Steel's blast furnace smelting vanadium-titanium ore, due to the use of C to reduce ilmenite, inevitably TiO 2 The over-reduction of Ti(C, N, O) produces foamy slag, resulting in "hot metal sticking to the tank", "sticking slag", "high iron loss" and "low desulfurization capacity"

Panzhihua Iron and Steel's 33-year production practice has proved that Panzhihua Iron and Steel's blast furnace can only smelt 53% of vanadium-titanium ore, and TiO in slag 2 The question of 25% is a limiting quantity has not been satisfactorily explained

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