Treatment method of waste water discharged by silicon carbide micro powder production device

A technology for silicon carbide micropowder and production equipment, which is applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. The effect of concentrated collection, easy collection and reduction of equipment investment

Inactive Publication Date: 2011-06-15
临沂市凯祥硅粉有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Have not yet seen the bibliographical information of the waste water treatment of relevant silicon carbide micropowder at present,

Method used

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  • Treatment method of waste water discharged by silicon carbide micro powder production device
  • Treatment method of waste water discharged by silicon carbide micro powder production device
  • Treatment method of waste water discharged by silicon carbide micro powder production device

Examples

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Embodiment 1

[0052] The method for treating wastewater discharged from a silicon carbide micropowder production device of the present invention is characterized in that:

[0053] ①. The wastewater discharged from the pickling section and the wastewater discharged from the alkali washing section are collected separately for pH adjustment of wastewater treatment;

[0054] ②. Composite flocculant formulated with inorganic flocculant A and organic flocculant B;

[0055] Including the following steps:

[0056] a. Neutralization

[0057] Appropriate amount of wastewater from pickling wastewater pool 1 and alkali washing wastewater pool 2 is controlled through valves 9 and 10, and added to the neutralization pool 3 of wastewater discharged from the silicon carbide micropowder production plant, and the pH is adjusted to 6-9;

[0058] b. Flocculation

[0059] Pump the wastewater from the neutralization tank 3 with a pH of 6 to 9 into the flocculation tank 4, then add the inorganic flocculant A i...

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Abstract

The invention discloses a treatment method of waste water discharged by a silicon carbide micro powder production device, which belongs to multi-stage treatment of the waste water. The method is characterized by comprising the following steps of: (1) collecting waste water discharged at an acid washing section and waste water discharged at an alkali washing section respectively for pH adjustment during waste water treatment; and (2) neutralizing, flocculating, performing filter pressing, separating and precipitating with a composite flocculating agent prepared from an inorganic flocculating agent A and an organic flocculating agent B, and recycling or discharged qualified waste water. Suspended matters in treated waste water reach a discharge standard. Silicon carbide micro powder is recycled from the waste water discharged by the silicon carbide micro powder production device and is sold as a byproduct, so that wastes are made profitable, the environment is protected, the economic benefits of enterprises are enhanced, and production cost is lowered.

Description

technical field [0001] The invention relates to a method for treating waste water discharged from a silicon carbide superfine fraction production device. It belongs to the multi-stage treatment of wastewater. Background technique [0002] The hardness of silicon carbide is second only to natural diamond and a kind of black corundum, so silicon carbide particles are high-quality grinding materials. Silicon carbide micropowder is used as silicon wafer wire cutting edge material. In the production process of silicon carbide micropowder, including alkali washing, pickling purification, hydraulic overflow classification treatment and other processes, silicon carbide micropowder with a particle size of less than 1 micron is difficult to pass through. The way of natural settlement settles down, therefore, the suspended solids in the discharged wastewater seriously exceed the standard, causing environmental pollution. [0003] Have not yet seen the bibliographical information of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C01B31/36C02F11/12C02F1/52
Inventor 周强龚志刚
Owner 临沂市凯祥硅粉有限公司
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