Electroplating sludge resource utilization method

A technology for electroplating sludge and recycling, which is applied in chemical instruments and methods, sludge treatment, water/sludge/sewage treatment, etc. It can solve the problems of low purity of recycled products, secondary pollution of sludge and waste residue, and high cost. , to achieve the effect of being beneficial to the environmental protection of the atmosphere, water and soil, eliminating environmental pollution and hidden dangers, and being beneficial to environmental protection

Active Publication Date: 2016-10-12
湖南省小尹无忌环境能源科技开发有限公司 +1
View PDF4 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0031] In summary, although the resource utilization of electroplating sludge has always been a research hotspot at home and abroad, many scientific research institutions and enterprises have conducted a lot of research on the recycling of valuable metals in electroplating sludge and the harmless resource treatment. However, most of them are in the laboratory stage or demonstration. Although there are relatively mature wet process (hydrometallurgy) and thermochemical (pyrometallurgy) valuable metal recovery technologies, the process of fully recovering valuable metals in electroplating sludge Technically, there are still problems such as high cost,

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

[0062] The electroplating sludge stored in an electronics factory was taken for resource utilization, and the dry basis composition (%) was analyzed by ICP-AES as [Cu] 11.47, [Fe] 25.31, [Mn] 0.59, [S] 3.52, and [Sn] 0.032, 【Mg】1.11, 【Na】0.32, 【K】0.02, 【P】0.12, 【Al】0.08, 【Ca】9.41, 【Ti】0.19, 【Cr】0.008, 【Co】0.003, 【Ni】 0.008, [Zn] 0.003, [Ag] 0.001, [Ba] 0.14, [Pb] 0.002.

[0063] The electroplating sludge is converted into copper sulfate, ferric sulfate raw materials and gypsum-based materials according to the following steps, and the coagulation regulator for cement production is made from the electroplating sludge:

[0064](1) Pretreatment (separation of valuable heavy metals): use (well-known) hydrometallurgical biological treatment process to separate heavy metal elements in electroplating sludge, neutralize electroplating sludge with lime, and obtain calcium sulfate dihydrate as the main component (calcium sulfate dihydrate content 80.12wt% on a dry basis) electroplating ...

Embodiment 2

[0072] The electroplating sludge stored in an electronics factory was taken for resource utilization, and the dry basis composition (%) was analyzed by ICP-AES as [Cu] 11.47, [Fe] 25.31, [Mn] 0.59, [S] 3.52, and [Sn] 0.032, 【Mg】1.11, 【Na】0.32, 【K】0.02, 【P】0.12, 【Al】0.08, 【Ca】9.41, 【Ti】0.19, 【Cr】0.008, 【Co】0.003, 【Ni】 0.008, [Zn] 0.003, [Ag] 0.001, [Ba] 0.14, [Pb] 0.002.

[0073] The electroplating sludge is converted into copper sulfate, ferric sulfate raw materials and gypsum-based materials according to the following steps, and the coagulation regulator for cement production is made from the electroplating sludge:

[0074] (1) Pretreatment (separation of valuable heavy metals): use (well-known) hydrometallurgical biological treatment process to separate heavy metal elements in electroplating sludge, neutralize electroplating sludge with lime, and obtain calcium sulfate dihydrate as the main component (calcium sulfate dihydrate content 80.72wt% on a dry basis) electroplating...

Embodiment 3

[0082] The electroplating sludge stockpiled by an electroplating enterprise was taken for resource utilization, and the dry basis composition (%) was analyzed by ICP-AES as [Cu] 13.32, [Fe] 28.51, [Mn] 0.87, [S] 2.94, and [Sn] 0.081, 【Mg】0.61, 【Na】1.24, 【K】0.04, 【P】0.37, 【Al】0.89, 【Ca】1.95, 【Ti】0.05, 【Cr】0.016, 【Co】0.004, 【Ni】 0.017, [Zn] 0.042, [Ag] 0.002, [Ba] 0.37, [Pb] 0.001, and Au6.12g / t. The electroplating sludge is converted into metal materials and gypsum-based materials according to the following steps, and calcium sulfoaluminate clinker and calcium thioferrate clinker are produced from electroplating sludge, mainly including the following steps:

[0083] (1) Pretreatment (separation of heavy metals): The heavy metal elements in the electroplating sludge are separated by (known) hydrometallurgical process, and the electroplating sludge is neutralized with lime to obtain calcium sulfate dihydrate as the main component (dry basis dihydrate electroplating sludge with a...

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

An electroplating sludge resource utilization method comprises the following steps: (1) pretreatment: separating heavy metal elements from electroplating sludge by a wet process, and neutralizing the electroplating sludge with lime or limestone, to obtain an electroplating sludge waste residue with calcium sulphate dihydrate as a main component; (2) preparation of raw material: replacing all gypsum and all iron raw materials in raw material ingredients with the electroplating sludge waste residue, or replacing a part of gypsum and a part of iron raw materials with the electroplating sludge waste residue, then blending with gypsum and vanadine, and powder-grinding to prepare the raw material for producing a calcium sulphoaluminate or calcium sulphoferrate clinker; and (3) baking for 0.5-1 h at the temperature of 1250-1400 DEG C. The electroplating sludge is used as the raw material containing polymetal and is subjected to resource utilization to produce two kinds of materials, namely a corresponding metal and/or metal salt material and a gypsum-based building material, so the problem of pollution in electroplating industry is facilitated to be solved, and the implementation of circular economy development is facilitated.

Description

technical field [0001] The invention relates to the field of environmental protection and waste utilization, in particular to a resource utilization method of electroplating sludge. Background technique [0002] The electroplating industry is one of the three major polluting industries in the world today, and it is also an important basic processing industry in my country. The electroplating sludge generated during the electroplating process enriches almost all the elements in the electroplating wastewater, including harmful heavy metals, and the conventional compound components in the electroplating sludge Mainly include: CaO, SO 3 、Al 2 o 3 , Fe 2 o 3 , CuO , NiO, ZnO, CdO, CrO, SiO 2 、Na 2 O, MgO, Co 2 o 4 , SrO, Nb 2 o 5 , ZrO 2 , PbO, HgO, etc. and some anions, among which copper, nickel, chromium and other heavy metals are mainly hydroxide precipitates. Most electroplating sludge mainly contains chromium, iron, nickel, copper, zinc and other heavy meta...

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
IPC IPC(8): C04B7/32C04B7/24C04B22/14C01F11/46C02F11/00C02F103/16
CPCC01F11/46C02F11/00C02F11/008C02F2103/16C02F2303/06C04B7/24C04B7/323C04B22/143Y02P40/10
Inventor 尹无忌郭学益尹小林
Owner 湖南省小尹无忌环境能源科技开发有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap