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Smelting process for vanadium titano-magnetite

A technology of vanadium titanomagnetite and smelting method, applied in furnaces, cooking furnaces, furnace types, etc., can solve problems such as direct reduction of vanadium titanomagnetite that is not mentioned

Active Publication Date: 2012-08-08
云霄县食品快检中心
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the article does not mention the use of tunnel kilns for the direct reduction of vanadium-titanium magnetite

Method used

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  • Smelting process for vanadium titano-magnetite
  • Smelting process for vanadium titano-magnetite
  • Smelting process for vanadium titano-magnetite

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Embodiment

[0032] Take vanadium-titanium magnetite in Panzhihua area, TFe grade is 60.23%, TiO 2 It is 8.64%, and the water content is controlled at 2 It was 35.34%, and the recovery rate was 82.78%. The two materials have respectively reached the quality indicators of iron powder for reducing agent and titanium medium ore, and the recovery rate is also high, realizing the preliminary goal of comprehensive utilization of vanadium-titanium magnetite. Thereafter, the reduced iron powder after the first reduction is subjected to gas-based secondary fine reduction. This reduction method is to use reducing gas and inert gas for reduction under high temperature conditions. The raw material for producing gas is liquid ammonia. Ammonia is decomposed by heating and pyrolysis to generate nitrogen and hydrogen. Nitrogen has relatively stable chemical properties and can be used as a protective gas, while hydrogen can be used as a reducing gas. Of course, the reducing gas can also be produced from na...

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Abstract

The invention discloses a smelting process for vanadium titano-magnetite. By the method, iron and titanium resources in the vanadium titano-magnetite can be effectively utilized. The method comprises the following steps of: a, respectively filling the vanadium titano-magnetite and a carbonaceous reducing agent into a reducing tank in layer; b, putting a kiln car carrying the reducing tank in a tunnel kiln to perform reduction reaction; c, after the reaction is finished, taking a reducing ingot from the reducing tank, and crushing and sieving the reducing ingot; and d, performing magnetic separation on the sieved material, wherein the obtained magnetic substance is iron powder, and the non-magnetic substance is a titanium-collecting substance. Both the content of TFe and the content of MFe in the iron powder which is obtained by combining the way of filling the materials in layer and a tunnel kiln reduction technology can be up to about 90 percent even higher, the effect is unexpected, TiO2 in the obtained titanium-collecting substance can be up to over 35 percent and reaches the grade of a titanium mine, and the vanadium titano-magnetite can serve as the raw material for producing titanium dioxide.

Description

technical field [0001] The invention relates to a method for smelting vanadium-titanium magnetite. Background technique [0002] Vanadium-titanium magnetite in Panzhihua City (TFe is about 55%, TiO 2 8 to 12%) is rich in resources, but its utilization effect is not good. At present, the utilization methods of vanadium-titanium magnetite are mainly blast furnace smelting after sintering and reduction in rotary hearth furnace and melting in electric furnace after ball pressing. The blast furnace smelting method is to control the temperature at 1400-1600°C, add vanadium-titanium-magnetite sintering material, fuel, flux, etc. for smelting to obtain molten iron. The disadvantage of this method is that only the iron in the vanadium-titanium magnetite can be used, and the titanium dioxide has completely entered the blast furnace slag. In the blast furnace slag, the content of titanium dioxide is only more than 20%, and it contains a lot of Si, Impurities such as Ca and Mg are no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/04C22B34/22C22B34/12
Inventor 荀勇
Owner 云霄县食品快检中心
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