Method for firing brick by using solid slag produced in electroplating wastewater treatment

A technology of electroplating wastewater and treatment agent, which is applied in the field of industrial solid waste treatment, can solve the problems of land occupation, large energy consumption, secondary pollution of the environment, and secondary pollution of the environment, so as to reduce treatment costs, save energy, and avoid secondary pollution. The effect of the investment

Active Publication Date: 2014-04-02
漆雅丽
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The current solution is one is to landfill, which not only occupies the land, but also pollutes the land, which will harm future generations; the other is to dry the cement, but the water must be dried thoroughly, which consumes a lot of energy, making the disposal cost high, and it is also easy to cause secondary pollution. secondary polluted environment
The problems of occupying land, consuming large amounts of energy, and easily causing secondary pollution to the environment need to be resolved urgently

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  • Method for firing brick by using solid slag produced in electroplating wastewater treatment

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Embodiment 1

[0022] A method of using physical and chemical methods to treat the solid slag produced by electroplating wastewater to make bricks. The electroplating wastewater first enters the adjustment pool for adjustment; then enters the reduction pool for reduction reaction. 3 Sodium metabisulfite, react for about 20 minutes to completely reduce hexavalent chromium to trivalent chromium; then enter the neutralization tank for neutralization reaction, add 1.0kg / m 3 QS electroplating wastewater treatment agent and 0.02kg / m 3 Amide, so that the pH value reaches 8, react for about 20 minutes; then enter the sedimentation tank for sedimentation and separation, the supernatant is discharged up to the standard, and the sediment is filtered by a plate and frame filter press to obtain a solid residue. The solid slag with a moisture content of 77.40% is mixed with 55% shale, 28% coal gangue and 5% raw coal in an amount of 12% and mixed evenly, extruded and dried in a drying furnace at 130°C for ...

Embodiment 2

[0029]A method of using physical and chemical methods to treat solid slag produced by electroplating wastewater to make bricks. The electroplating wastewater first enters the adjustment tank for adjustment, and then enters the reduction tank for reduction reaction. 3 Sodium metabisulfite, react for about 20 minutes to completely reduce hexavalent chromium to trivalent chromium; then enter the neutralization tank for neutralization reaction, add 1.5kg / m 3 QS electroplating wastewater treatment agent and 0.03kg / m 3 Amide, so that the pH value reaches 8, react for about 20 minutes; then enter the sedimentation tank for sedimentation and separation, the supernatant is discharged up to the standard, and the sediment is filtered by a plate and frame filter press to obtain a solid residue. Mix solid slag with a moisture content of 80% in an amount of 15% with shale 50%, coal gangue 30% and raw coal 5%, stir and mix evenly, extrude, and dry in a 160°C drying oven for 18 hours. After ...

Embodiment 3

[0036] A method of using physical and chemical methods to treat solid slag produced by electroplating wastewater to make bricks. The electroplating wastewater first enters the adjustment tank for adjustment, and then enters the reduction tank for reduction reaction. 3 Sodium metabisulfite, react for about 20 minutes to completely reduce hexavalent chromium to trivalent chromium; then enter the neutralization tank for neutralization reaction, add 2.0kg / m 3 QS electroplating wastewater treatment agent and 0.03kg / m 3 Amide, so that the pH value reaches 8, react for about 20 minutes; then enter the sedimentation tank for sedimentation and separation, the supernatant is discharged up to the standard, and the sediment is filtered by a plate and frame filter press to obtain a solid residue. The solid slag with a moisture content of 70% is mixed with 55% of shale, 30% of coal gangue and 5% of raw coal in an amount of 10% and mixed evenly, extruded and dried in a drying oven at 170°C f...

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Abstract

The invention provides a method for firing a brick by using solid slag produced in electroplating wastewater treatment, which is characterized by comprising the steps of treating electroplating wastewater through a physical-chemical method; then evenly mixing 10-15% of solid slag which is produced in electroplating wastewater treatment and has a water content of 70-80% and raw materials for brick firing, and firing to obtain a finished brick product. According to the invention, the solid slag produced in electroplating wastewater treatment and the brick firing process are organically combined, so that on the one hand, the supernatant of the treated electroplating wastewater can realize long-time stable up-to-standard discharge, and the standard-reaching rate is 99.9% or above; on the other hand, the fired brick produced from the solid slag completely meets the quality requirements of finished brick products, and also can completely reach and even exceed related environmental indexes of electroplating wastewater solid slag treatment in China.

Description

technical field [0001] The invention belongs to the field of industrial solid waste treatment, and in particular relates to a method for producing fired bricks by utilizing solid slag produced after electroplating wastewater is treated. Background technique [0002] There are many, small and scattered electroplating factories in our country, and the production technology is backward. At present, it is the simplest and most effective method to treat electroplating wastewater by chemical precipitation, which is adopted by most electroplating factories, and the mud production rate is generally 3-8Kg / m 3 about. [0003] The purpose of electroplating wastewater treatment is to settle the heavy metals in the wastewater to meet the national GB21900-2008 electroplating pollutant discharge standard. When electroplating wastewater is treated with physical and chemical methods, a large amount of solid sediment (referred to as solid residue) will be produced. If these solid residues a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00
Inventor 漆雅丽肖宇晗吴雨时漆丁源吴平益
Owner 漆雅丽
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