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Method for preparing titanium-rich material for fluidizing chlorination from high-calcium-magnesium low-grade titanium slag

A low-grade titanium, boiling chlorination technology, applied in metallurgy and chemical industry, can solve problems such as difficult industrial amplification, difficult upgrading, and inability to upgrade, to improve reduction kinetics, solve difficult or impossible to upgrade, and the recovery rate high effect

Active Publication Date: 2019-12-31
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to electric furnace smelting, only TiO can be obtained 2 High-calcium-magnesium and low-grade titanium slag products with a grade of 74% to 78% and (CaO+MgO) content as high as 6% to 10% have a dense structure and are difficult or impossible to upgrade
In the existing research, there are additives or supplementary special heating means, etc., the industrial scale-up is difficult and the energy consumption is high

Method used

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  • Method for preparing titanium-rich material for fluidizing chlorination from high-calcium-magnesium low-grade titanium slag
  • Method for preparing titanium-rich material for fluidizing chlorination from high-calcium-magnesium low-grade titanium slag

Examples

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Effect test

Embodiment 1

[0045] Weigh 200g of 40-200 mesh typical Panxi titanium slag, put it into a quartz reactor, and oxidize it at an oxidation temperature of 950°C, an oxygen concentration of 6vol.%, and an oxygen flow rate of 150L / h for 1h. After reaching the oxidation time, purge with nitrogen , then feed coke oven gas, reduce at 800°C for 1.5h, gas velocity is 130-150L / h, after the set time, feed nitrogen to cool to room temperature, then reduce titanium slag and hydrochloric acid in the digestion tank Mix evenly for acid leaching treatment, the concentration of hydrochloric acid is 20%, the liquid-solid ratio (ml:g)=2:1, the acid leaching temperature is 135°C, the acid leaching time is 6h, and the rotation speed of the digestion tank is 20r / min.

[0046] After the acid leaching treatment, the liquid-solid separation is carried out, and the washing water is washed with pure water until the washing water is clear, and finally dried in an oven at 105 ° C for 2 hours to obtain TiO 2 Grade is abou...

Embodiment 2

[0048] Weigh 200g of typical Panxi titanium slag of 40-200 mesh, put it into a quartz reactor, and oxidize it at an oxidation temperature of 1000°C, an oxygen concentration of 6vol.%, and an oxygen flow rate of 150L / h for 1.5h. After reaching the oxidation time, blow it with nitrogen. Scanning, the microscopic morphology of the oxidation product is as follows figure 1 As shown, then pass in coke oven gas, reduce at 850°C for 1.5h, the gas velocity is 130-150L / h, after the set time, pass in nitrogen to cool to room temperature, and then reduce the titanium slag in the digestion tank Mix with hydrochloric acid evenly for acid leaching treatment, the concentration of hydrochloric acid is 20%, the liquid-solid ratio (ml:g) = 2:1, the acid leaching temperature is 145°C, the acid leaching time is 6h, and the speed of the digestion tank is 20r / min.

[0049] After the acid leaching treatment, the liquid-solid separation is carried out, and the washing water is washed with pure water u...

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Abstract

The invention belongs to the field of metallurgy and chemical engineering and particularly relates to a method for preparing a titanium-rich material for fluidizing chlorination from high-calcium-magnesium low-grade titanium slag. The method for preparing the titanium-rich material for fluidizing chlorination from the high-calcium-magnesium low-grade titanium slag comprises the following steps that (1) the titanium slag is dried and sieved; (2) a high-temperature strong oxidation reaction is conducted on titanium concentrate under the temperature of 950-1000 DEG C; (3) then a weak reduction reaction is conducted under the temperature of 800-850 DEG C; (4) hydrochloric acid is added, and pressure leaching is conducted under heating rotation conditions; and (5) solids and liquids are separated, and the titanium-rich material finished product is obtained through washing and drying. Through the method, the titanium slag similar to Panzhihua high-calcium-magnesium low-grade titanium slag can be treated successfully, thereby being updated for preparing high-quality titanium-rich raw materials meeting the needs of fluidizing chlorination, and significance is achieved for utilizing complextitanium resources of the west of Panzhihua and for developing titanium chloride dioxide.

Description

technical field [0001] The invention belongs to the field of metallurgy and chemical industry, and in particular relates to a method for preparing titanium-rich material for boiling chlorination from high-calcium-magnesium and low-grade titanium slag. Background technique [0002] my country's Panxi ilmenite concentrate belongs to low-grade ilmenite ore with high calcium and magnesium content. The ways to prepare titanium-rich materials can be summarized into two categories. The fine-grained grade of the concentrate accounts for a relatively large proportion, and the obtained artificial rutile product has a finer particle size, which does not meet the requirements of boiling chlorination raw materials. The second category is to smelt titanium slag in an electric furnace with titanium concentrate, crush the titanium slag to a suitable particle size, and then upgrade the process route to prepare PUS slag, successfully solving the problem of fine titanium concentrate raw materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/12C22B7/04C22B1/00
CPCC22B1/005C22B7/007C22B7/04C22B34/1209C22B34/1245Y02P10/20
Inventor 刘娟叶恩东肖军李凯茂
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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