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Reactor for continuously leaching valuable metal of electroplating sludge and leaching method thereof

A technology for electroplating sludge and valuable metals, applied in the direction of improving process efficiency, etc., can solve problems such as complex connection of reactors, achieve high extraction efficiency, high infection efficiency, and low energy consumption

Active Publication Date: 2013-11-06
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the setting of the upper and lower parts of the internal circulation reactor, the connection of the reactor is more complicated

Method used

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  • Reactor for continuously leaching valuable metal of electroplating sludge and leaching method thereof
  • Reactor for continuously leaching valuable metal of electroplating sludge and leaching method thereof
  • Reactor for continuously leaching valuable metal of electroplating sludge and leaching method thereof

Examples

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Effect test

Embodiment 1

[0048] (Example 1, a reactor for continuously extracting valuable metals from electroplating sludge)

[0049] See figure 1 The reactor for continuously extracting valuable metals from electroplating sludge in this embodiment includes a reaction tank 1, a stirring assembly 2, an air supply assembly 3, a bacterial liquid supply assembly 4, a leachate outlet pipe 5, a waste residue discharge pipe 6 and a temperature control System 7.

[0050] The reaction tank 1 includes a tank main body 11 , a draft tube 12 , a support frame 13 , an insulation layer 14 and an electric heating coil 15 . The tank main body 11 is mainly formed by connecting a cylindrical upper body 11-7 at the top and an inverted truncated circular lower body 11-8 at the bottom. The volume of the tank body 11 is 0.2 to 1 cubic meter (this embodiment 0.5 cubic meters), the height of the tank main body 11 is 1 to 1.5 meters (1.2 meters in this embodiment), wherein the volume of the lower cylinder 11-8 accounts for ...

Embodiment 2

[0068] (Example 2, bioleaching method of valuable metals from electroplating sludge)

[0069] The bioleaching reaction of electroplating sludge involves the interfacial reaction and mass transfer among three phases (ie gas phase, liquid phase and solid phase). The liquid phase is not only the carrier of solid electroplating sludge particles, but also the medium of the unit reaction process, such as the growth and reproduction of leaching bacteria, the contact between solid particles and leaching bacteria, the chemical action of solid particles, the release of metal ions, the oxygen and Uniform distribution and mass transfer of carbon dioxide, etc. The mixing and interaction of these three phases are the basic factors affecting the bioleaching reaction of electroplating sludge. See Figure 4 , use the reactor leaching metal of embodiment 1 to comprise the following steps:

[0070] ① Feeding: add the pretreated electroplating sludge powder into the reaction tank 1, and then p...

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Abstract

The invention discloses a reactor for continuously leaching valuable metal of electroplating sludge and a leaching method thereof. The reactor comprises a reaction tank, a mixing component, an air supply component, a bacteria liquid supplying component, a lixivium outlet pipe, a waste residue discharge pipe and a temperature control system, wherein the reaction tank comprises a tank main body, a stream guide barrel, a support frame, an insulating layer and an electric heating coil; the stream guide barrel is a cylindrical barrel which is vertically arranged and provided with openings at the upper and lower ends; the stream guide barrel is fixed inside the tank main body through the support frame; stirring blades are fixed on a rod shaft in a layering manner in the up and down direction, and the rod shaft is arranged inside the stream guide barrel. According to the reactor for continuously leaching the valuable metal of the electroplating sludge, provided by the invention, an electroplating sludge biological leaching technology is applied to an engineering practice, and continuous leaching reaction of biological leaching flora on the electroplating sludge is carried out, so that the reactor has the characteristics that the energy consumption is low, the mixing is soft, the oxygen mass transferring efficiency is high, the transmission efficiency is high, the operation is simple and the investment is low.

Description

technical field [0001] The invention relates to the field of resource recycling of electroplating sludge, in particular to a reactor for continuously extracting valuable metals in electroplating sludge and a method for extracting metals. Background technique [0002] Electroplating, chemical and other industries produce a large amount of electroplating wastewater containing heavy metals every year. After chemical precipitation treatment of these electroplating wastewater, a large amount of electroplating sludge rich in heavy metals is produced, which seriously pollutes the environment. Electroplating sludge is a hazardous waste. Among the 47 types of hazardous waste defined in the "National Hazardous Waste List", electroplating sludge occupies 7 categories. In fact, electroplating sludge is rich in a large amount of heavy metal resources (heavy metals generally refer to metals with a density greater than or equal to 5, and specifically refer to metals with atomic numbers abo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B3/18
CPCY02P10/20
Inventor 程洁红孔峰
Owner JIANGSU UNIV OF TECH
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