Method for detecting solid content of slurry

A detection method, solid content technology, applied in the direction of weighing by removing certain components, can solve the problem of short detection time, and achieve the effect of simple operation, less pollution, and shortened detection time

Inactive Publication Date: 2017-02-01
ASIA SILICON QINGHAI
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Problems solved by technology

[0004] The problem solved by the present invention is to centrifugally process the chlorosilane slurry in the cold hydrogenation process with a centrifuge, then dry the chlorosilane mixed in the slurry with nitrogen, and then weigh it after drying. The mass fraction of the original sample mass is used as the solid content of the slurry. This method has a short detection time, is easy to operate, clean, safe, and is not easy to pollute the environment. The PTFE centrifuge tube is not easy to corrode, and it is convenient to centrifuge the test tube after the test. Equipment cleaning and maintenance

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Embodiment Construction

[0017] A method for detecting the solid content of slurry, comprising the following steps: a. taking and weighing a certain amount of chlorosilane slurry sample; b. centrifuging the stirred chlorosilane slurry slurry sample with a centrifuge; c. blowing nitrogen gas to blow out the remaining volatile chlorosilane liquid; d. weighing the mass of the remaining solid to obtain the solid content in the slurry.

[0018] When testing: 1. Take the stirred chlorosilane slurry sample (30ml of chlorosilane slurry mixture) and place it in a pre-dried and weighed (accurate to 0.02g) polytetrafluorocentrifuge test tube, quickly cover it, Weigh (accurate to 0.02g) to obtain the sample mass m 0 .

[0019] 2. Put the chlorosilane slurry sample in a centrifuge and centrifuge at 3000r / min for 3min. After centrifugation, pour the supernatant into the waste liquid bottle.

[0020] 3. Connect the PTFE centrifuge test tube through the flow meter and the nitrogen pipeline, then pass through the ni...

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Abstract

The invention discloses a method for detecting the solid content of slurry so as to overcome the defects in the prior art. The method comprises the following steps: a, performing centrifugal treatment on a stirred chlorosilane slurry sample by a centrifugal machine; b, purging the residual volatile chlorosilane liquid by introducing nitrogen; and c, weighing the weight of the residual solid to obtain the solid content of the slurry. According to the method for detecting the solid content of the chlorosilane slurry in a cold hydrogenation process provided by the invention, the chlorosilane slurry and the chlorosilane liquid are separated by the centrifugal machine and then are treated, so the detection time is greatly shortened. The detection method is simple and convenient to operate, clean, safe and insusceptible to environmental pollution; furthermore, a polytetrafluoroethylene centrifugal test tube is insusceptible to corrosion, and cleaning and maintenance of appliances, such as the centrifugal test tube and the like, are facilitated after detection is finished.

Description

technical field [0001] The invention belongs to the field of polysilicon production detection, and in particular relates to a method for detecting the solid content of liquid-solid mixed raw material chemical slurry which is flammable, explosive, highly volatile, highly corrosive and sensitive to moisture. Background technique [0002] During the production of polysilicon by the traditional Siemens method, more than 20 tons of silicon tetrachloride are by-produced per ton of product. The large number of by-products restricts the large-scale development of polysilicon. The cold hydrogenation technology of silicon tetrachloride solves this problem and converts tetrachloride Silicon is converted into trichlorosilane as a raw material for recycling, so larger-scale 10,000-ton polysilicon devices have emerged. However, the existing cold hydrogenation technology is still imperfect, and there are many problems to be solved. Among them, the discharge and treatment of the slurry duri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 陈兆峰魏东亮曹岩德马婷安军林王海礼
Owner ASIA SILICON QINGHAI
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