A method for preparing and recovering sponge copper metal from pickling sludge

A technology for pickling sludge and sponge copper, which is applied in the direction of improving process efficiency, can solve the problems of reduction, harmlessness and resource utilization of sludge that cannot be pickled, and achieves zero discharge and preparation. Simple recycling process and great economic benefits

Inactive Publication Date: 2017-05-03
JIANGSU HENGJIA RENEWABLE RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] To sum up, the recycling of pickling sludge treatment has always been the focus of research at home and abroad. A lot of research has been carried out and some achievements have been made, but so far there are not many industrialized ones. Solidified pit burial is the most common. Fundamentally realize the reduction, harmlessness and resource utilization of pickling sludge. Among the resource utilization schemes that have been proposed, only leaching method, incineration recovery method and materialization technology are more feasible. High efficiency, incineration and recycling can effectively realize sludge reduction and harmlessness

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  • A method for preparing and recovering sponge copper metal from pickling sludge

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Embodiment 1

[0023] Such as figure 1 The present invention as shown provides a method for preparing and recovering sponge copper metal from pickling sludge, comprising the following steps, step 1, pulping, pulverizing the pickling sludge with a pulverizer, adding water and stirring to form a slurry evenly , the water content concentration is 10%-20%, among them, adding water industrial water, including river water, well water, surface recycling water. Step 2, stirring and leaching, first add concentrated sulfuric acid to the slurry pickling sludge in step 1, stir while adding until the pH value of the slurry pickling sludge is 1-2, then add milk of lime, and stir while adding until The pH value of slurry pickling sludge is 2-3.5. Step 3. Perform a pressure filtration treatment on the leach residue in step 2 to obtain a filter residue and a filtrate, and the filtrate enters the next process step. Step 4, to the filtrate of step 3, utilize LIX984 extraction agent to carry out extraction tr...

Embodiment 2

[0026] Such as figure 1 The present invention as shown provides a method for preparing and recovering sponge copper metal from pickling sludge, comprising the following steps, step 1, pulping, pulverizing the pickling sludge with a pulverizer, adding water and stirring to form a slurry evenly , the water content concentration is 10%-15%, among them, adding water industrial water, including river water, well water, ground recovery water. Step 2, stirring and leaching, first add concentrated sulfuric acid to the slurry pickling sludge in step 1, and stir while adding until the pH value of the slurry pickling sludge is 1-1.5, then add milk of lime, and stir while adding until The pH value of slurry pickling sludge is 2.5-3. Step 3. Perform a pressure filtration treatment on the leach residue in step 2 to obtain a filter residue and a filtrate, and the filtrate enters the next process step. Step 4, to the filtrate of step 3, utilize LIX984 extraction agent to carry out extractio...

Embodiment 3

[0029] Such as figure 1The present invention as shown provides a method for preparing and recovering sponge copper metal from pickling sludge, comprising the following steps, step 1, pulping, pulverizing the pickling sludge with a pulverizer, adding water and stirring to form a slurry evenly , the water content concentration is 12%-14%, among them, adding water industrial water, including river water, well water, surface recycling water. Step 2, stirring and leaching, first add concentrated sulfuric acid to the slurry pickling sludge in step 1, and stir while adding until the pH value of the slurry pickling sludge is 1.2-1.4, then add lime milk, and stir while adding until The PH value of slurry pickling sludge is 2.6-2.8. Step 3. Perform a pressure filtration treatment on the leach residue in step 2 to obtain a filter residue and a filtrate, and the filtrate enters the next process step. Step 4, to the filtrate of step 3, utilize LIX984 extraction agent to carry out extract...

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Abstract

The invention belongs to the technical field of recovery of sponge copper in pickling sludge, and particularly discloses a method for preparing and recovering sponge copper metal in pickling sludge. The method comprises the following steps of pulping, mixing-leaching, filtering, LIX984 extracting, performing a replacement reaction and filtering. The method has the benefits that the sponge copper metal in the pickling sludge is recovered by a high-pressured acid leaching method; compared with a traditional wet process, the method has the advantages that the recovery process is simple, the raw material consumption is relatively low, the sponge copper recovery rate is high, economic benefits are high, and, zero emission of industrial wastewater is realized.

Description

technical field [0001] The invention belongs to the application technical field of recovering sponge copper from pickling sludge, and in particular relates to a method for preparing and recovering sponge copper metal from pickling sludge. Background technique [0002] At present, there is no economical and technical parallel treatment method for pickling sludge. The method commonly used at home and abroad is solid landfill method, and pickling sludge contains a large amount of heavy metals. Landfilling of pickling sludge Before treatment, it must be solidified and stabilized. The commonly used curing agents are cement, asphalt, glass, water glass, etc. Among them, cement is one of the most common curing agents. Cement curing refers to mixing waste with ordinary cement to form A solidified body with a certain strength, so as to achieve the purpose of reducing the leaching rate of hazardous components in the waste. Although the cement solidification method is widely used, it h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B15/00
CPCY02P10/20
Inventor 徐荣文王年青周扬
Owner JIANGSU HENGJIA RENEWABLE RESOURCES
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