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Anti-radiation functional aggregate prepared from Cr-containing and Zn-containing electroplating sludge

A technology for electroplating sludge and radiation protection, which is applied in the direction of material analysis, application, and household appliances using wave/particle radiation. , avoid loss, avoid the effect of dissolution

Active Publication Date: 2017-04-26
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a radiation-proof functional aggregate prepared by electroplating sludge containing Cr and Zn, which has excellent radiation-proof performance and mechanical properties, can replace traditional natural high-density ore aggregates, and solve the problem of traditional radiation-proof concrete. The problem of weak area of ​​ray shielding caused by poor homogeneity, and at the same time, it can absorb a large amount of industrial sludge containing heavy metals, which has important economic and environmental benefits

Method used

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  • Anti-radiation functional aggregate prepared from Cr-containing and Zn-containing electroplating sludge
  • Anti-radiation functional aggregate prepared from Cr-containing and Zn-containing electroplating sludge

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preparation example Construction

[0039] The preparation method of described flux comprises the following steps:

[0040] 1) Add 550ml of distilled water into the magnetic stirring heating pot, and heat it to about 95°C, then add 250g of borax, stir well until the borax is completely dissolved, ensure that the temperature of the mixed solution is above 90°C, and filter the solution at the same time to obtain clarification solution; 2) using an acidic burette to step 1) in the clarified solution obtained, add dropwise the dilute sulfuric acid with a mass concentration of 15%, and slowly stir until crystals are separated out; at this time, the addition speed of the sulfuric acid is controlled to ensure that the pH value of the solution is maintained In 4-5, when all the crystals are precipitated, the remaining solution is filtered, and then dried at 65° C. for 1.5 hours to obtain boric acid crystals; 3) the boric acid crystals obtained in step 2) are heated under vacuum conditions (260 Pa) to Calcined at 350°C f...

Embodiment 1～4

[0042] The anti-radiation functional aggregates prepared by using Cr and Zn-containing electroplating sludge described in Examples 1 to 4 include recycled aggregates and cement slurry shells coated on their surfaces; the recycled aggregates are made of electroplated sludge powder , shale, metakaolin, and flux are sintered; the cement slurry shell is made of cement, silica fume, expansion agent, water, and water-reducing agent as raw materials through mixing and solidification. The specific ratio is shown in Table 1; The preparation method comprises the following steps:

[0043] 1) Weigh the components for aggregate sintering according to the proportions described in Table 1, mix and grind the weighed raw materials, and then granulate, the particle size is 5-10 mm, and the moisture content is controlled to 18%; 2 ) Preheat the granulated pellets at 550°C for 35 minutes, then calcinate at 1060°C for 50 minutes, and finally cool naturally in the air to room temperature to obtain ...

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Abstract

The invention discloses an anti-radiation functional aggregate prepared from Cr-containing and Zn-containing electroplating sludge. By means of heavy metal elements including Cr and Zn, the anti-radiation functional aggregate has the beneficial effect that the anti-radiation functional aggregate has good shielding performance for high-energy rays, and a regenerated aggregate can have good anti-radiation performance; pulp wrapping processing is conducted on the regenerated aggregate through a vacuum stirring technology, and the surface structure of the aggregate is optimized; ultrahigh performance processing is conducted on the aggregate, subjected to pulp wrapping, through autoclaved curing, and the chemical property, the shielding performance and the heavy metal ion solidification effect of the anti-radiation functional aggregate are improved. The anti-radiation functional aggregate solves the problem that the uniformity of natural high-density ore anti-radiation concrete is poor, meanwhile, a large amount of heavy-metal-containing industrial sludge can be consumed, and the important significance in preparation of anti-radiation concrete and processing of the industrial sludge is achieved.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a radiation-proof functional aggregate prepared by using Cr and Zn-containing electroplating sludge and a preparation method thereof. Background technique [0002] There are many companies in the battery industry and surface treatment industry in my country. Due to the rapid upgrading of domestic appliances and electronic equipment, my country's electroplating and other industries have developed rapidly. The treatment of industrial waste such as electroplating sludge has become a prominent environmental protection problem. The sludge and waste residue produced by the electroplating industry are mixed wastes rich in various heavy metal components, and are one of the most harmful industrial wastes, with an annual discharge of more than 400,000 tons. And the heavy metal content contained in the electroplating sludge is very high, and the heavy metal elements of Cr and Z...

Claims

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Application Information

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IPC IPC(8): C04B41/85C04B33/132C04B33/04C04B33/32C04B28/04G01N23/00
CPCC04B28/04C04B33/04C04B33/132C04B33/1327C04B33/32C04B41/009C04B41/85C04B2111/00017C04B2111/00025C04B2111/00482C04B2201/20C04B2201/50C04B2235/95G01N23/00C04B14/062C04B22/066C04B2103/302Y02P40/60
Inventor 丁庆军刘勇强王承张杨耿春东刘凯徐意石华
Owner WUHAN UNIV OF TECH
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