Method for preparing titanium-rich material with chlorination capacity from low-grade natural rutile

A natural rutile and low-grade technology, applied in the field of titanium chemical industry, can solve problems such as complex process flow, serious equipment corrosion, and high energy consumption, and achieve simple process flow, good impurity removal effect, and environmental friendliness

Inactive Publication Date: 2019-03-01
YIBIN TIANYUAN GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical composition of the titanium-rich material obtained by this method can meet the requirements of the titanium dioxide chloride method. The disadvantages are that the process flow is complicated, the energy consumption is large, the cost is high, it is not suitable for natural rutile, the waste acid is difficult to treat, the equipment is seriously corroded, and the obtained The pulverization rate of artificial rutile is high, which is unfavorable for the subsequent production of titanium dioxide
[0006] In view of the fact that there is no process at home and abroad to treat low-grade natural rutile, its grade and impurity content can meet the requirements of chlorinated titanium-rich materials, and at the same time make the cost the lowest

Method used

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  • Method for preparing titanium-rich material with chlorination capacity from low-grade natural rutile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The low-grade natural rutile (wherein some component content is: TiO 2 : 60.17%, SiO 2 : 3.16%, CaO: 0.31%, MgO: 0.57%) for strong magnetic separation to separate natural rutile concentrate and ilmenite; weigh 100g of natural rutile concentrate, first add HCl solution with a concentration of 18%, liquid-solid The ratio is 4:1, and then add 40% HF solution and NH 4 F solid is used as leaching aid for leaching, the amount of HF solution is 1.0% of the quality of natural rutile concentrate used, NH 4 The dosage of F solid is 2.5% of the mass of the natural rutile concentrate used, the leaching reaction temperature is 80°C, the leaching reaction time is 2h, the leaching pressure is normal pressure, and then the solid-liquid separation is carried out; the separated solid material is deionized water Washing, the liquid-solid ratio is 3:1, after washing 3 times, filter, and then dry the filtered material at 110°C for 3 hours to obtain the chlorinable titanium-rich material; ...

Embodiment 2

[0034] The low-grade natural rutile (wherein some component content is: TiO 2 : 75.96%, SiO 2 : 3.74%, CaO: 0.24%, MgO: 0.37%) for strong magnetic separation to separate natural rutile concentrate and ilmenite; weigh 100g of natural rutile concentrate, first add H2O with a concentration of 20% 2 SO 4 solution, the liquid-solid ratio is 3:1, and then add HF solution with a concentration of 40% as a leaching agent for leaching. The amount of HF solution is 4.0% of the quality of natural rutile concentrate used. The reaction time is 1h, the leaching pressure is normal pressure, and then the solid-liquid separation is carried out; the separated solid material is washed with deionized water, and the liquid-solid ratio is 3:1. After washing 3 times, filter, and then the filtered material Dry at 110°C for 3 hours to obtain chlorinated titanium-rich material; then add quicklime and 0.1g / L calcium carbide dissolved in the acid leaching mother liquor to the separated acid leaching mot...

Embodiment 3

[0037] The low-grade natural rutile (wherein some component content is: TiO 2 : 68.74%, SiO 2 : 4.20%, CaO: 0.41%, MgO: 0.34%) for strong magnetic separation to separate natural rutile concentrate and ilmenite; weigh 100g of natural rutile concentrate, first add H 2 SO 4 solution and 20% phosphoric acid solution, the liquid-solid ratio is 3:1, and then NaF solid and KF solid are added as leaching aids for leaching. The amount of NaF solid is 2.0% of the quality of the natural rutile concentrate used, and the amount of KF solid It is 23% of the quality of the natural rutile concentrate used, the leaching reaction temperature is 94°C, the leaching reaction time is 1h, the leaching pressure is normal pressure, and then the solid-liquid separation is carried out; the separated solid material is washed with deionized water, and the liquid The solid ratio is 3:1, after washing 3 times, filter, and then dry the filtered material at 110°C for 3 hours to obtain chlorinable titanium-r...

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Abstract

The invention discloses a method for preparing a titanium-rich material with chlorination capacity from low-grade natural rutile, and relates to the field of titanium chemical. The method comprises the following steps: performing magnetic separation on the low-grade natural rutile to obtain natural rutile concentrate and ilmenite, adding an acid solution and a leaching aid capable of ionizing fluoride in a solution sequentially to the natural rutile concentrate for a leaching reaction, performing solid-liquid separation to obtain a solid material and acid leached mother liquor, washing the solid material until the solid material is neutral, and then performing drying to prepare the qualified titanium-rich material with chlorination capacity. The method is low in energy consumption and cost, short in technological process and environmentally friendly, good impurity removal effect is realized, content of TiO2 in natural rutile can be increased greatly, and titanium recovery rate is highand can reach 95% or higher.

Description

technical field [0001] The invention relates to the technical field of titanium chemical industry, in particular to a method for preparing chlorinable titanium-rich material from low-grade natural rutile. Background technique [0002] At present, after some high-quality natural rutiles are selected from seashore placer deposits, there are still a large amount of TiO 2 <85% low-grade natural rutile, now only DuPont has the chlorination technology to directly use some of this low-grade natural rutile to produce chlorination titanium dioxide, but because of its low grade and high impurity content, it produces a lot of waste residue, It affects the production efficiency of the chlorination furnace, and also increases the difficulty of environmental protection; low-grade natural rutile can also be used in the welding material industry, but its consumption is small. Therefore, most of the low-grade natural rutile cannot be effectively utilized due to its low grade and high imp...

Claims

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Application Information

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IPC IPC(8): C22B34/12
CPCC22B34/1209C22B34/1213C22B34/1245Y02P10/20
Inventor 罗云邓敏明崇伦周高明刘祥海唐勇汪大成李露
Owner YIBIN TIANYUAN GRP CO LTD
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