Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for removing carbon from waste silicon powder after copper extraction

A silicon powder and copper extraction technology, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of resource waste, underutilization, increased landfill construction and transportation costs, etc.

Active Publication Date: 2022-04-15
XINJIANG DAQO NEW ENERGY
View PDF13 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, direct landfill not only causes waste of resources, but also increases the construction and transportation costs of landfill; such valuable things are not fully utilized

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The specific operation steps are:

[0037] (1) Add 4500kg of tap water, 20kg of OP-10, 20kg of sodium dodecylbenzenesulfonate and 5kg of dibutyl ester to a 12,000-liter reactor successively, and stir evenly to obtain a cleaning solution.

[0038] (2) Put 3000kg of organic silicon waste slag slurry copper extraction waste silicon powder (that is, waste silicon powder after copper extraction, which contains 23% moisture and 4.2% carbon) into the reactor, stir for 8 hours, and then let it stand for precipitation.

[0039] (3) Suck off the upper liquid after standing in the reactor, then wash the precipitate twice with water, and filter it with a plate frame.

[0040] (4) drying the filter cake after washing and filtering to obtain dry powder 1425kg.

[0041] The dry powder after drying was analyzed, and the mass percentages of its main components were: 84.7% silicon, 0.8% carbon, and 1.3% moisture.

Embodiment 2

[0043] The specific operation steps are:

[0044] (1) Add 12000kg of tap water, 100kg of OP-10, 125kg of sodium dodecylbenzenesulfonate and 25kg of dibutyl ester successively in a 25 cubic reactor, and stir evenly;

[0045] (2) Put 8000kg of organic silicon waste slag slurry copper extraction waste silicon powder (that is, waste silicon powder after copper extraction, which contains 20% moisture and 4.6% carbon) into the reactor, stir for 8h and then stand overnight;

[0046] (3) Suck off the upper liquid after standing in the reactor, then wash the precipitate twice with water, and filter it with a plate frame.

[0047] (4) drying the filter cake after cleaning and filtering to obtain 4190 kg of dry powder.

[0048] The dry powder after drying was analyzed, and the mass percentages of its main components were: 83.5% silicon, 1.1% carbon, and 1.2% moisture.

Embodiment 3

[0050] The specific operation steps are:

[0051] (1) Add 4500kg of tap water, 45kg of OP-10, 90kg of sodium dodecylbenzenesulfonate and 18kg of dibutyl ester to a 12,000-liter reactor successively, and stir evenly to obtain a cleaning solution.

[0052] (2) Put 3750kg of organic silicon waste slag slurry copper extraction waste silicon powder (that is, waste silicon powder after copper extraction, which contains 25% water and 5% carbon) into the reactor, stir for 6 hours, and then let it stand for precipitation.

[0053] (3) Suck off the upper liquid after standing in the reactor, then wash the precipitate twice with water, and filter it with a plate frame.

[0054] (4) drying the filter cake after cleaning and filtering to obtain 1942kg of dry powder.

[0055] The dry powder after drying was analyzed, and the mass percentages of its main components were: 80.1% silicon, 1.3% carbon, and 1.5% moisture.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for removing carbon from waste silicon powder after copper extraction. The invention relates to a method for removing carbon from waste silicon powder after copper extraction, which comprises the following steps: (1) adding a cleaning solution into the waste silicon powder after copper extraction, fully stirring, and standing for precipitation; and (2) washing the precipitate at the lower part with water, and drying. According to the method for removing carbon from the waste silicon powder after copper extraction, the content of C can be reduced to about 1%, the treated material can be directly used for synthesizing a deoxidizing agent and can also be used as a raw material for manufacturing a silicon nucleating agent, and the purpose of waste recycling is completely achieved.

Description

technical field [0001] The invention belongs to the field of resource utilization of organic silicon waste slag slurry, and in particular relates to a method for removing carbon from waste silicon powder after extracting copper. Background technique [0002] Most domestic organic silicon manufacturers use the direct method to produce organic silicon monomers, and a large amount of waste slurry and waste contacts will be generated during the production process. The waste slag and waste contacts contain 5-15% copper, 3-10% organic matter, and the rest are mainly silicon powder. With the increasing pressure of environmental protection, the technology and concept of resource utilization of industrial solid waste are constantly improving. Copper in such waste slag and waste contacts is a valuable substance and is tried to be recovered. [0003] At present, the treatment method of many enterprises is: first pretreat the waste residue slurry and waste contact body with concentrat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/037
CPCY02P10/20
Inventor 吴展平赵云松王元攀
Owner XINJIANG DAQO NEW ENERGY