Method for producing aluminum chloride, silicon chloride and ferric chloride by utilizing coal gangue

A technology of coal gangue and silicon chloride, applied in the direction of aluminum chloride, silicon halide compound, aluminum halide, etc., can solve the problem of insufficient utilization of carbon resources, achieve comprehensive utilization, simple technical solutions, The effect of increasing added value

Inactive Publication Date: 2013-02-13
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The past utilization of aluminum resources in coal gangue includes the use of coal gangue to prepare aluminum hydroxide (Chinese patent No. 94113062.2), alumina (Chinese patent No. 200810051316.8), aluminum chloride (Chinese patent No. Patent), aluminum sulfate (Chinese Patent No. 201110209467.3), etc.; and the utilization of silicon resources in coal gangue is mostly reflected in the production of building materials; iron

Method used

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  • Method for producing aluminum chloride, silicon chloride and ferric chloride by utilizing coal gangue
  • Method for producing aluminum chloride, silicon chloride and ferric chloride by utilizing coal gangue
  • Method for producing aluminum chloride, silicon chloride and ferric chloride by utilizing coal gangue

Examples

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Example Embodiment

[0035] Example 1

[0036] Take 2000g of coal gangue whose components are shown in Table 1, and calculate the content of each component and the C content required for the chlorination reaction of each oxide in equations (1)-(8), which are listed in Table 2.

[0037] Table 2 The content of various components of coal gangue and the amount of C required for the chlorination reaction

[0038] Ingredients Content (g) The amount of C required for chlorination reaction (g) SiO 2 850.8170.2 Al 2 O 3 603.6106.5 Fe 2 O 3 168.218.9 MgO10.81.6 CaO 25.42.7 TiO 2 23.03.5 K 2 O 6.60.4 Na 2 O 5.20.5 C262.2 /

[0039] (1) According to Table 2, the content of C required for the chlorination reaction of the gangue in the coal gangue is 304.3g, and the gangue itself contains 262.2g of C. The difference between the two is 42.1g, taking into account the measurement error and the feeding process. In the chlorination reaction of coal gangue, add 60g graphite powder, mix coal gangue and charcoal to form ...

Example Embodiment

[0045] Example 2

[0046] Take 5000g coal gangue, calculate the content of each component and the content of C required for the chlorination reaction of each oxide in equations (1)-(8), which are listed in Table 3.

[0047] Table 3 The content of various components of coal gangue and the amount of C required for the chlorination reaction

[0048] Ingredients Content (g) The amount of C required for chlorination reaction (g) SiO 2 2127.0425.4 Al 2 O 3 1509.0266.3 Fe 2 O 3 420.547.3 MgO27.04.1 CaO 63.56.8 TiO 2 57.58.6 K 2 O 16.51.1 Na 2 O 13.01.3 C655.5 /

[0049] (1) According to Table 3, the content of C required for the chlorination reaction of oxides in coal gangue amounts to 760.9g, and the gangue itself contains 655.5g of C, the difference between the two is 105.4g. Taking into account the measurement error and the loss caused by the feeding process, 127g of activated petroleum coke is added to the chlorination reaction of coal gangue, coal gangue and petroleum coke are mix...

Example Embodiment

[0055] Example 3

[0056] (1) According to Table 3, the content of C required for the chlorination reaction of oxides in coal gangue amounts to 760.9g, and the gangue itself contains 655.5g of C, the difference between the two is 105.4g. Taking into account the measurement error and the loss caused by the feeding process, add 158g of activated petroleum coke to the chlorination reaction of coal gangue, mix coal gangue with bituminous coal or blue carbon to form a mixture, and crush the mixture to ≤160 mesh;

[0057] (2) Put the crushed mixture in a chlorination furnace, and pass chlorine gas into the furnace at 1000℃ for chlorination. The chlorine flow rate is 0.12m 3 / s;

[0058] The obtained slag is discharged directly, and the obtained furnace gas is sent to the dust collector for dust removal treatment, and the temperature in the dust collector is controlled to 600°C;

[0059] (3) Condense the dust-removed gas at 400°C, 220°C and 2°C to obtain crude AlCl in turn 3 , FeCl 3 And SiC...

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Abstract

The invention belongs to the field of resource recycling and utilizing, and particularly relates to a method for producing aluminum chloride, silicon chloride and ferric chloride by utilizing coal gangue. The method provided by the invention comprises the following steps of mixing a carbonaceous reducing agent with the theoretical additive amount of 1.2-1.5 times and coal gangue to prepare a mixture, crushing the mixture until the granularity is smaller than or equal to 160 meshes, putting the crushed mixture into a chlorination furnace, introducing chlorine into the furnace, introducing the obtained furnace gas into a dust remover for dust removal, condensing the gas to dust removal at 370-420 DEG C, 200-250 DEG C and 0-4 DEG C to sequentially obtain coarse AlCl3 liquid, FeCl3 liquid and SiCl4 liquid, and distilling the coarse AlCl3, FeCl3 and SiCl4 to obtain pure AlCl3, FeCl3 and SiCl4 products. According to the method, the comprehensive utilization of the coal gangue resources is realized, the additional value of products is improved, the technical scheme is simple and practicable and the method has extremely good popularization value.

Description

[0001] technical field [0002] The invention belongs to the field of resource recovery and utilization, and in particular relates to a method for producing aluminum chloride, silicon chloride and ferric chloride by using coal gangue. Background technique [0003] Coal gangue is the waste slag produced during coal mining, washing and processing, including excavation gangue produced during rock roadway excavation, gangue mined from roof, floor and rock interlayers sandwiched in coal seams during coal mining, and coal washing The gangue discharged during the production process of the factory is one of the largest industrial solid wastes in China. [0004] The comprehensive utilization rate of coal gangue in our country is very low at present. A large amount of coal gangue has been piled up, occupying fertile fields, blocking river courses, and seriously affecting the ecological environment. In addition, coal gangue contains certain combustibles, which spontaneously combust un...

Claims

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Application Information

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IPC IPC(8): C01F7/56C01B33/08C01G49/10
Inventor 王兆文胡宪伟高炳亮石忠宁于江玉
Owner NORTHEASTERN UNIV
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