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Method of producing synthetic rutile utilizing high-titanium slag

An artificial rutile, rutile phase technology, applied in the removal of titanium dioxide, solid waste, titanium oxide/hydroxide, etc., can solve the problems of high labor intensity, high production cost, large equipment investment, etc., to promote chemical reactions, The effect of high thermal energy utilization efficiency and large physical heat

Inactive Publication Date: 2007-02-28
隋智通 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 1. The physical heat of high-titanium slag cannot be effectively utilized, resulting in high energy consumption and high production costs;
[0010] 2. Titanium slag is oxidized in solid state, the oxidation roasting time is long and the efficiency is low;
[0011] 3. Acid hydrolysis and leaching under high temperature and high pressure, labor-intensive and polluting;
[0012] 4. Oxidation and slow cooling require a specific metallurgical furnace, which requires a large investment in equipment and complicated operation;
[0013] 5. The process is long and the effect is not ideal.

Method used

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  • Method of producing synthetic rutile utilizing high-titanium slag
  • Method of producing synthetic rutile utilizing high-titanium slag
  • Method of producing synthetic rutile utilizing high-titanium slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0055] Weigh 200g of electric furnace smelting titanium slag, its composition is 74.79%TiO 2 , 3.14% CaO, 8.89% MgO, 3.86% Al 2 o 3 , 3.10% FeO. Put the weighed titanium slag in the slag tank, heat the titanium slag until it melts, and control the temperature of the slag at about 1550°C; when the temperature is constant, add additives CaO6g and P to the slag in the slag tank 2 o 5 14g. While (or after) adding the additive, blow oxygen into the molten slag, the oxidation time is 5min, and the partial pressure of oxygen is controlled at 10 -2 In the range of -1 atm, the titanium component is selectively enriched in the rutile phase. Afterwards, the temperature of the slag increases by about 40°C due to oxidation, reaching 1590°C; the cooling rate is controlled at 2°C / min within the temperature range of 1590-1300°C, and the rutile phase grows selectively as the furnace cools to room temperature. The cooled oxidized slag is crushed and ground to a particle size of +200 mesh ...

Embodiment approach 2

[0057] Weigh 200g of electric furnace smelting titanium slag, its composition is 74.79%TiO 2 , 3.14% CaO, 8.89% MgO, 3.86% Al 2 o 3 , 3.10% FeO. The slag is melted by resistance heating, and the temperature continues to rise. When the temperature reaches 1550C, the temperature is kept constant, and oxygen is introduced in the molten state, and the additives CaO 4g and Na are added at the same time. 3 PO 4 14g, the oxidation time is 5min, and the partial pressure of oxygen is controlled at 10 -2 In the range of -1atm, the temperature of the slag after oxidation rises to 1590°C and cools down in the temperature range of 1590-1300°C, with a cooling rate of 5°C / min. The cooled oxidized slag is crushed and ground, with a particle size of +200 mesh to -300 mesh. It is leached with 16% hydrochloric acid, the immersion temperature is 55°C, the stirring speed is 4 rpm, and the immersion time is 40min. After filtering and drying, the final product containing 90.06% TiO 2 artifici...

Embodiment approach 3

[0059] Weigh 200g of electric furnace smelting titanium slag, its composition is 74.79%TiO 2 , 3.14% CaO, 8.89% MgO, 3.86% Al 2 o 3 , 3.10% FeO. The slag is melted by resistance heating, and the temperature continues to rise. When the temperature reaches 1530C, the temperature is kept constant, and oxygen is introduced in the molten state, and the additive CaF is added at the same time. 2 6g and P 2 o 5 12g, the oxidation time is 5min, and the partial pressure of oxygen is controlled at 10 -2 In the range of -1atm, the slag temperature rises to 1570℃ after oxidation. Cool down within the temperature range of 1570-1300°C, and the cooling rate is 1.0°C / min. The cooled oxidized slag is crushed and ground, with a particle size of +200 mesh to -300 mesh. It is leached with 10% hydrochloric acid, the immersion temperature is 45°C, the stirring speed is 4 rpm, and the immersion time is 50min. After filtering and drying, the final product containing 89.28% TiO 2 artificial ru...

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Abstract

The invention discloses a manufacturing method of artificial rutile through high-titanium slag, which comprises the following steps: heating to fuse titanium slag in the slag container; adding addictive in the slag tank; blowing oxidized gas in the slag; making titanium component enriched in the rutile selectively; controlling the cooling velocity to cool slag to indoor temperature; growing rutile phase selectively; grinding the cooled condensed slag; fining; adopting wet metallurgical separating method or ore dressing separating method to separate rutile from condensed slag; obtaining artificial rutile with high-grade TiO2.

Description

technical field [0001] The invention relates to a method for producing artificial rutile, in particular to a method for producing artificial rutile by using high-titanium slag. Background technique [0002] At present, in the domestic and foreign titanium dioxide raw material markets, the raw materials for "high-grade chloride titanium dioxide", such as natural rutile and artificial rutile, are particularly in short supply. High titanium slag has become the main raw material for the production of titanium dioxide by the chloride method. The high-titanium slag prepared by the current submerged arc furnace reduction method contains about 60-75% TiO 2 , low grade, not suitable for "high-grade chloride titanium dioxide" raw material. Therefore, it is imperative to improve the grade of titanium slag to meet market demand. In high titanium slag, black titanite is the main phase containing titanium, and its TiO 2 The content is relatively high (60%-80%), which is an early crysta...

Claims

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Application Information

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IPC IPC(8): C01G23/047C01G23/08B09B3/00
Inventor 隋智通张力
Owner 隋智通
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