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Method for improving grade of titanium slag

A high-grade titanium slag technology, applied in chemical instruments and methods, titanium compounds, titanium dioxide, etc., can solve the problems of large equipment investment, high processing cost, no economic advantages of high-grade titanium slag, etc. The effect of improving processing flow and saving processing time

Active Publication Date: 2019-11-22
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the method of removing calcium and magnesium in low-grade titanium slag is basically the use of acid leaching, which has high processing costs and large equipment investment, resulting in no economic advantage in the preparation of high-grade titanium slag by upgrading high-calcium magnesium titanium slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1 adopts the inventive method to process high-calcium-magnesium acid-soluble titanium slag

[0049] 200g of high-calcium-magnesium acid-soluble titanium slag and 2.0% w / w carbonaceous reducing agent (fixed carbon content is 83.66%) mixture is placed in a vacuum induction melting furnace for smelting, and the calcium oxide content in the acid-soluble titanium slag is 1.83%, magnesium oxide The content is 4.18%, the titanium slag grade is 74.52%, and the titanium slag particle size +200 mesh accounts for 97.21%. The charging container is a graphite crucible, the inner diameter of the crucible is 55 mm, and the inner height of the crucible is 100 mm. The vacuum degree of the induction melting furnace is 20pa, the Ar gas with a purity of 99.99% is introduced, the gas flow rate is 0.5L / min, the smelting temperature is 1500°C, the smelting time is 21min, and the power of the vacuum induction furnace is 22kW. During the smelting process, some oxides such as magnesi...

Embodiment 2

[0050] Embodiment 2 adopts the method of the present invention to process high-calcium-magnesium acid-soluble titanium slag

[0051]200g of high-calcium-magnesium acid-soluble titanium slag and 1.5% w / w carbonaceous reducing agent (fixed carbon content is 83.66%) mixture is placed in a vacuum induction melting furnace for smelting, the calcium oxide content in the acid-soluble titanium slag is 1.47%, magnesium oxide The content is 4.88%, the titanium slag grade is 75.29%, and the titanium slag particle size +200 mesh accounts for 97.21%. The charging container is a graphite crucible, the inner diameter of the crucible is 55 mm, and the inner height of the crucible is 100 mm. The vacuum degree of the induction melting furnace is 20pa, the Ar gas with a purity of 99.99% is introduced, the gas flow rate is 0.5L / min, the smelting temperature is 1550°C, the smelting time is 17min, and the power of the vacuum induction furnace is 25kW. During the smelting process, some oxides such ...

Embodiment 3

[0052] Embodiment 3 adopts the inventive method to process high-calcium-magnesium acid-soluble titanium slag

[0053] 200g of high-calcium-magnesium acid-soluble titanium slag and 2.5% w / w carbonaceous reducing agent (fixed carbon content is 83.66%) mixture is placed in a vacuum induction melting furnace for smelting, and the calcium oxide content in the acid-soluble titanium slag is 1.65%, magnesium oxide The content is 5.23%, the titanium slag grade is 72.33%, and the titanium slag particle size +200 mesh accounts for 97.21%. The charging container is a graphite crucible, the inner diameter of the crucible is 55 mm, and the inner height of the crucible is 100 mm. The vacuum degree of the induction melting furnace is 20pa, the Ar gas with a purity of 99.99% is introduced, the gas flow rate is 0.5L / min, the smelting temperature is 1450°C, the smelting time is 25min, and the power of the vacuum induction furnace is 25kW. During the smelting process, some oxides such as magnesi...

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Abstract

The invention relates to a method for improving the grade of titanium slag, and belongs to the field of titanium slag smelting aftertreatment. The invention provides the method for improving the gradeof titanium slag. The method comprises the following steps: a, vacuum smelting: wherein 1.5%-2.5% w / w of a carbonaceous reducing agent is added into the titanium slag to obtain a mixture, and the mixture is subjected to vacuum smelting, wherein the vacuum degree is controlled to be -5 pa to 20 pa, the smelting temperature is controlled to be 1400 DEG C to 1550 DEG C, the smelting time is 10 min to 25 min, and the smelting power is controlled to be 15 kW to 25 kW, so that molten titanium slag is obtained for standby application; b, cooling and crushing the molten titanium slag; and c, carryingout magnetic separation on the titanium slag to obtain high-grade titanium slag. The method is easy to operate, conventional wet treatment equipment is reduced, the technological process is simplified, the titanium slag grade improving time is saved, the production cost of the boiling chlorinated titanium dioxide raw material is reduced, and a new method is provided for reducing the content of calcium and magnesium in the titanium slag, improving the titanium slag grade and providing a high-quality titanium-containing raw material for boiling chlorinated titanium dioxide.

Description

technical field [0001] The invention relates to a method for improving the grade of titanium slag, and belongs to the field of post-smelting treatment of titanium slag. Background technique [0002] Titanium concentrate is currently the most valuable titanium-containing material, but its grade is low, and it is often necessary to remove non-titanium impurities in the ore to enrich titanium dioxide in the slag. Electric furnace smelting titanium slag is a good method to enrich titanium dioxide in titanium concentrate, but its ability to remove non-ferrous impurities is poor. Almost all non-ferrous oxides in titanium concentrate enter titanium slag, resulting in high impurity content in slag, which affects the application of titanium slag. field. The grade of titanium slag is low, and the content of calcium and magnesium is high, which seriously affects the production of boiling titanium dioxide chloride. [0003] The production of ebullient chloride titanium dioxide require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/07C01G23/053C21B11/10
CPCC01G23/07C01G23/0532C21B11/10
Inventor 宋兵马勇肖军李凯茂
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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