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Metal sludge conversion treatment process

A conversion treatment and sludge technology, applied in the direction of sludge treatment, water/sludge/sewage treatment, special treatment targets, etc., can solve the problems of re-pollution of the environment, pollution diffusion, electroplating sludge composition and properties, etc., to achieve Solve the accumulation of sludge, solve the pollution of the environment, and improve the effect of market competitiveness

Active Publication Date: 2021-06-01
浙江合力海科新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main pollutant Cr(OH) in electroplating sludge 3 , when exposed to the air, under alkaline conditions, can be absorbed by the O in the air 2 Oxidation, making Cr 3+ Reversible conversion to Cr 6+ If the electroplating sludge is piled up and landfilled without any treatment, it will cause the pollution to spread and bring more serious consequences to the environment if it is exposed to wind and rain.
[0007] The composition and properties of electroplating sludge are very complex, and its effective treatment has always been the focus and difficulty of research. The current practice of solidifying sludge has the risk of re-pollution to the environment

Method used

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  • Metal sludge conversion treatment process

Examples

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Effect test

Embodiment 1

[0027] A metal sludge conversion treatment process has the following processing steps:

[0028] 1. The dry sludge and the wet sludge are respectively installed in two sludge tanks, and the sludge is grabbed from the dry and wet sludge tanks 19 by the driving grab 11 to the reamer scale 12 to crush the sludge and weigh it. Then put into dry sludge storage tank 13 and wet sludge storage tank 14 respectively, dry sludge is delivered to mixer 2 after being weighed by belt scale 15, and wet sludge is weighed and crushed by reamer scale 12 and then delivered to mixer. Feeder 2, the sludge additive in the sludge additive tank 17 is weighed and crushed by the reamer scale 12 and then delivered to the mixer 2. The dry sludge accounts for 40%, the wet sludge accounts for 50% and the sludge additive accounts for 10%. %, stir evenly in the mixer 2 and then pour it into the granulator 3 for granulation. Specifically, the fluorite in the sludge additive accounts for 10%, the waste gypsum ac...

Embodiment 2

[0035] A metal sludge conversion treatment process has the following processing steps:

[0036] 1. The dry sludge and the wet sludge are respectively installed in two sludge tanks, and the sludge is grabbed from the dry and wet sludge tanks 19 by the driving grab 11 to the reamer scale 12 to crush the sludge and weigh it. Then put into dry sludge storage tank 13 and wet sludge storage tank 14 respectively, dry sludge is delivered to mixer 2 after being weighed by belt scale 15, and wet sludge is weighed and crushed by reamer scale 12 and then delivered to mixer. Feeder 2, the sludge additive in the sludge additive tank 17 is weighed and crushed by the reamer scale 12 and then delivered to the mixer 2. The dry sludge accounts for 45%, the wet sludge accounts for 40% and the sludge additive accounts for 15%. %, stir evenly in the mixer 2 and then pour it into the granulator 3 for granulation. Specifically, the fluorite in the sludge additive accounts for 12.5%, the waste gypsum ...

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Abstract

The invention relates to a metal sludge conversion treatment process which comprises the following processing steps: conveying dry sludge, wet sludge and a sludge additive into a mixer, uniformly conducting stirring in the mixer, and pouring an obtained mixture into a granulator for granulation; conveying mixed sludge formed after granulation forming into a sintering furnace through a conveyor for sintering; after the sintering is finished, combining a fusion additive, conducting conveying by a conveyor, and conducting fusion in a fusion furnace; and putting the molten material after melting is completed into a water quenching pool for water quenching treatment, conducting water quenching treatment to form water-quenched slag, putting the water-quenched slag into a water-quenched slag tank, and then conveying the water-quenched slag into a grinding machine through an elevator for grinding to form an admixture. The method has the advantages that 1, harmless treatment and recycling high-added-value utilization of the metal sludge are realized; and 2, the problems of sludge accumulation, transportation and landfill are solved, and the pollution of metal sludge to the environment is solved.

Description

technical field [0001] The invention relates to the field of metal sludge treatment, in particular to a metal sludge conversion treatment process. Background technique [0002] Electroplating sludge refers to heavy metal-containing sludge waste generated after wastewater treatment in the electroplating industry, and is included in the seventeenth category of hazardous waste in the national hazardous waste list. As the "final state" of electroplating wastewater, although its amount is much less than that of wastewater, since heavy metals such as copper, nickel, cadmium, zinc, and iron in wastewater are transferred to sludge, electroplating sludge is harmful to the environment. It is more serious than electroplating wastewater. If there is no disposal of this extremely harmful electroplating sludge, it is self-evident that the damage to the ecological environment is self-evident. On the other hand, if the extremely high-grade heavy metal substances in the electroplating sludg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/02C04B20/02C02F11/00C04B18/04
CPCC04B18/026C04B20/026C02F11/00C02F2303/06C04B18/023C04B18/0472C04B18/12C04B18/04C04B14/022C04B14/36C04B14/041C04B14/368C04B22/0013C04B18/0481C04B18/141Y02W30/91
Inventor 丁小富
Owner 浙江合力海科新材料股份有限公司