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Treatment method of titanium mineral and metal silicate mineral through ammonium salt pressurized pyrolysis

A metal silicate and titanium mineral technology, applied in chemical instruments and methods, titanium compounds, titanium oxide/hydroxide, etc., can solve the problems of low product purity, low titanium magnesium aluminum leaching rate, and low product purity. , to achieve the effects of environmental friendliness, improved resource utilization, and obvious economic benefits

Inactive Publication Date: 2019-11-01
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved in the present invention is: how to overcome the problems of low extraction rate of titanium, magnesium and aluminum in the extraction of titanium minerals and metal silicate minerals and the low purity of the products, and provide an ammonium salt pressurized pyrolysis treatment of titanium minerals and metal Silicate Mineral Method
[0009] The invention proposes a method for treating titanium minerals and metal silicate minerals by pressurized pyrolysis of ammonium salts, which can efficiently recover valuable metals such as titanium, magnesium and aluminum, effectively solve the problem of low product purity, obtain high-value products, and Realizing the recycling of ammonium salts has very important theoretical and practical significance for the efficient utilization of titanium-containing minerals and metal silicates

Method used

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  • Treatment method of titanium mineral and metal silicate mineral through ammonium salt pressurized pyrolysis
  • Treatment method of titanium mineral and metal silicate mineral through ammonium salt pressurized pyrolysis
  • Treatment method of titanium mineral and metal silicate mineral through ammonium salt pressurized pyrolysis

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The chemical composition analysis of steel slag from Ningshan Iron and Steel Group is as follows:

[0049] Table 1 Analysis results of steel slag composition

[0050]

[0051] The sample was taken from the steel slag of the oxygen-blown top converter of Ningshan Iron and Steel Group. The chemical composition analysis results are shown in Table 1. The main minerals are grossular garnet and cabernetite.

[0052] according to figure 1 The method carries out cascade recovery titanium magnesium aluminum valuable metal, and concrete steps are as follows:

[0053] (1) Ammonium sulfate roasting

[0054] Ball mill the steel slag to -0.074mm to 81.09%, dry and disperse at 90°C, mix the above powder material with ammonium sulfate at a ratio of 1:3, and pyrolyze it in an autoclave at a temperature of 300°C for 1.5 h, the sampling port is opened at the initial stage, the generated ammonia gas is collected, and distilled water is introduced to form ammonia water, and when the g...

Embodiment 2

[0060] The chemical composition analysis of the titanium-containing blast furnace slag of Panzhihua Iron and Steel Group is as follows:

[0061] Table 2 Component analysis results of titanium-containing blast furnace slag

[0062]

[0063] The samples were taken from the titanium-containing blast furnace slag after ironmaking in Panzhihua Iron and Steel Group. The chemical composition analysis results are shown in Table 2. The main minerals are perovskite and diopside.

[0064] according to figure 1 The method carries out cascade recovery titanium magnesium aluminum valuable metal, and concrete steps are as follows:

[0065] (1) Ammonium sulfate roasting

[0066] Ball mill the titanium-containing blast furnace slag to -0.074mm to 77.28%, dry and break up at 95°C, mix the above powder material with ammonium sulfate at a ratio of 1:2, and put it in an autoclave at a temperature of 350°C After pyrolysis for 2 hours, the sampling port is opened at the initial stage, the gene...

Embodiment 3

[0072] The chemical composition analysis of the high-titanium slag of Hesteel Co., Ltd. is as follows:

[0073] Table 3 Analysis results of high titanium slag components

[0074]

[0075] The sample was taken from the high-titanium slag smelted in the electric furnace of HBIS Co., Ltd. The chemical composition analysis results are shown in Table 3. The main minerals are black titanite, silicate glass body and free TiO 2 .

[0076] according to figure 1 The method carries out cascade recovery titanium magnesium aluminum valuable metal, and concrete steps are as follows:

[0077] (1) Ammonium sulfate roasting

[0078] Ball mill the high-titanium slag to -0.074mm to 71.63%, dry and break up at 100°C, mix the above powder material with ammonium sulfate at a ratio of 1:4, and heat it in an autoclave at a temperature of 400°C After 2.5 hours of solution, the sampling port is opened at the initial stage, the generated ammonia gas is collected, and distilled water is passed thr...

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Abstract

The invention discloses a treatment method of titanium mineral and metal silicate mineral through ammonium salt pressurized pyrolysis. The method comprises the following steps of uniformly mixing thepre-treated titanium mineral and metal silicate mineral with ammonium salt based on a certain proportion and then conducting low-temperature pyrolysis on the mixer in high pressure kettle; performinghermetic roasting when the pH of sampling opening gas is acidic, so that under the hermetic condition, the ammonium salt can effectively salinize valuable metal in minerals and release valuable elements which are inset in the lattice, and then leaching roasting slag in dilute acid to obtain acid leaching solution containing high-concentration titanium-aluminum-magnesium; and performing fractionalhydrolysis on the titanium-aluminum-magnesium in acid leaching solution for step recycling so as to obtain a high purity product. Meanwhile, ammonia water is recycled, and then subjected to evaporation and crystallization, so that cyclic utilization of the ammonium salt can be realized. According to the method, the step recycling of the titanium-aluminum-magnesium in the titanium mineral and the metal silicate mineral is realized, and the ammonium salt is recycled, thus achieving the purpose of waste resource recovery.

Description

technical field [0001] The invention belongs to the field of resource utilization of industrial solid waste, and relates to a method for extracting titanium, magnesium and aluminum by using ammonium salt pressurized pyrolysis to treat titanium minerals and metal silicate minerals. Background technique [0002] Titanium reserves are very rich on the earth, with a crustal abundance of 0.61%, and its content is higher than that of common copper, nickel, tin, lead, and zinc. There are more than 140 known minerals, but they are basically symbiotic minerals. The main forms are ilmenite, titanomagnetite and hematite. The vanadium-titanium magnetite in the Panxi area of ​​China is a super-large deposit of polymetallic symbiosis in the world, with a reserve of 9.66 billion tons, of which titanium (TiO 2 ) 873 million tons (accounting for 90.5% of the country and 35.17% of the world), its structure is dense, the gangue content is high, and the crystal grain size is basically about 10...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/12C01F5/02C01F7/26C01G23/053C22B1/02C22B3/06C22B21/00C22B26/22
CPCC01F5/02C01F7/26C01G23/053C01G23/0532C01P2006/80C22B1/02C22B3/06C22B21/0015C22B26/22C22B34/124Y02P10/20
Inventor 李浩然边振忠
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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