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A method and equipment for treating organic silicon slag by chlorination

A technology of organosilicon and chlorination, which is applied in the field of metallurgy, can solve the problems of high process cost, waste of copper and iron resources, etc., achieve the effect of short process flow, small equipment investment, and improved roasting effect

Active Publication Date: 2021-03-26
CHENGDU SILICON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: the existing organic silicon slag treatment method will cause waste of copper and iron resources, and the process cost is high. Solve the environmental protection problems of waste organic silicon slag, recover valuable metals copper, iron, silicon, etc. in organic silicon slag, economical and environmentally friendly

Method used

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  • A method and equipment for treating organic silicon slag by chlorination
  • A method and equipment for treating organic silicon slag by chlorination
  • A method and equipment for treating organic silicon slag by chlorination

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as Figure 1-4As shown, the fluidized furnace for implementing the chlorination method to treat organic silicon slag includes a body of furnace 1, and a side wall near the bottom of the body of furnace 1 is provided with a feed shell 2 and a slag outlet 3; the feed shell The top of the body 2 is provided with a mounting hole, and also includes a charging sleeve 4 with an open axial top end and a closed bottom end. The side wall of the open end of the feeding sleeve 4 is provided with a mounting flange 5, and the shaft of the feeding sleeve 4 Stretch into the feed housing 2 from the mounting hole toward the bottom, and be fixed at the mounting hole of the housing 2 by the mounting flange 5; the charging sleeve 4 is provided with a rotating shaft 17, and the axis line of the rotating shaft 17 is in line with the The axial center line of feeding sleeve 4 coincides, and the axial bottom end of rotating shaft 17 is connected with the top of truncated cone 6, and the bot...

Embodiment 2

[0039] Further improvement on the basis of Example 1, the bottom surface of the charging sleeve 4 is provided with a mounting block 10, the mounting block 10 is provided with a bearing 11, and the bearing 11 is provided with a limit post 12, and the bearing 11 The axis line of the center line, the axis line of the limit post 12 coincides with the axis line of the feeding sleeve 4, and the bottom surface of the conical frustum 6 is provided with a limit hole 13 adapted to the limit post 12, and the limit The column 12 is embedded in the limit hole 13, and the radial cross-sections of the limit column 12 and the limit hole 13 are polygonal structures; the bottom surface of the charging sleeve 4 is provided with a rubber sealing ring 14 protruding along the circumferential direction. A sealing groove adapted to the rubber sealing ring 14 is recessed along the circumferential direction on the bottom surface of the truncated cone 6 . The open end of the feeding sleeve 4 is also pro...

Embodiment 3

[0041] Adopt the fluidized furnace shown in embodiment 2 to carry out the method for chlorination process organosilicon slag, concrete operation method is: mix the organosilicon slag through slaking treatment into reducing agent carbon powder, the add-on of reducing agent is 5% of silicon slag weight , then continuously add the organic silicon slag into the boiling chlorination furnace for chlorination roasting, the conditions of chlorination roasting are: roasting temperature 400°C, roasting time 30min, chlorine gas flow rate 0.1kg / min / kg organic silicon slag; The chloride gas is condensed and recovered by the condenser to obtain a silicon tetrachloride solution; the chlorinated slag is washed with tap water according to the liquid-solid ratio of 2:1 to obtain a chloride mixed solution containing copper and iron; Iron powder is added to the solution for replacement reaction. After the reaction is completed, copper powder and iron-containing solution are obtained by filtration;...

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Abstract

The invention discloses a method for treating organic silicon slag by the aid of chlorination processes. The method includes steps of 1, adding reducing agents into the organic silicon slag to obtainmixtures after aging treatment is carried out on the organic silicon slag, continuously adding the mixtures into a boiling chlorination furnace, carrying out chlorination roasting and selectively chlorinating copper and iron in the organic silicon slag; 2, adding slag chlorinated at the step 1 into water, and washing and dissolving copper chloride and iron chloride in the slag to obtain chloride mixed solution; 3, adding iron powder into the chloride mixed solution, replacing copper in the chloride mixed solution and carrying out filtering to obtain copper powder and iron-containing solution;4, adding quicklime into the iron-containing solution, regulating the pH (potential of hydrogen) value of solution, filling the solution with air, oxidizing the solution, and carrying out filter separation to obtain iron hydroxide precipitates and iron-precipitated solution; 5, drying the iron hydroxide precipitates to obtain finished products. The method has the advantages that environmental protection problems due to waste organic silicon slag can be solved by the aid of the method, valuable metal copper, iron, silicon and the like in the organic silicon slag can be recycled by the aid of the method, and accordingly the method is economical and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method and equipment for treating organic silicon slag by chlorination. Background technique [0002] Organosilicon slag is a kind of industrial waste produced in the process of organosilicon production, which contains a considerable amount of elements such as silicon powder, silicon dioxide, copper and iron, and has a high recovery value. If it is directly buried, it will not only cause serious damage Environmental pollution, and a large amount of silicon and copper will be lost, resulting in a great waste of resources, and with the continuous expansion of the production scale of organic silicon, the amount of organic silicon slag continues to increase. At present, most organic silicon manufacturers treat organic silicon slurry by pouring it into the slurry tank for hydrolysis. During this process, a large amount of hydrogen chloride acid gas will be generated, which will c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/02C22B1/08C22B7/00C22B15/00C01B33/107F27B15/00F27B15/08
CPCC01B33/10721C01G49/02C22B1/08C22B7/006C22B15/0019C22B15/0082C22B15/0091F27B15/00F27B15/08Y02P10/20
Inventor 羊实周旭
Owner CHENGDU SILICON TECH CO LTD
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