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A stabilizer agent for lead-zinc waste rock tailings and its preparation and application

A stabilization and tailings technology, applied in the field of contaminated soil remediation, can solve the problems of complex operability of the treatment process, non-heat resistance of the product, and high product capacity ratio, so as to control the risk of secondary pollution without causing The effect of secondary pollution and reduction of dissolution rate

Active Publication Date: 2019-06-04
BEIJING GEOENVIRON ENG & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the engineering implementation of these agents, there may be more or less high cost, high volumetric ratio of the treated product, complex operability of the treatment process, high operating conditions, and the treated product does not have good heat resistance, acid resistance and Thermal stability and other issues

Method used

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  • A stabilizer agent for lead-zinc waste rock tailings and its preparation and application
  • A stabilizer agent for lead-zinc waste rock tailings and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The stabilizing agent of the present invention consists of powder and liquid. The powder is composed of the following components: quicklime, sodium bentonite, ammonium phosphate and sodium trithiosulfate. The solution consists of sodium dihydrogen phosphate and water.

[0034] In order to illustrate the practical application effect of the present invention, according to the treatment method and the ratio of the medicaments of the invention, the waste rock tailings in a certain lead-zinc mining area are treated and repaired. According to the detection results of the heavy metal content of waste rock tailings in this mining area, the average content of zinc (Zn) is 24200mg / kg; the average content of lead (Pb) is 22400mg / kg.

[0035] to combine figure 1 , the method for processing the lead-zinc waste rock tailings by using the stabilizing agent prepared in the present embodiment is as follows:

[0036] (1) Use a vibrating screen to separate the crushed stones with a par...

Embodiment 2

[0048]According to the detection results of the heavy metal content of waste rock tailings in this mining area, the average content of zinc (Zn) is 24200mg / kg; the average content of lead (Pb) is 22400mg / kg. The amount of powder added per 100Kg of waste rock tailings is 4Kg, and the amount of liquid agent added is 1L. The powder composition and its percentage by weight in the powder in the number 1# experimental group are quicklime 54%, kaolinite 18%, ammonium phosphate 20%, sodium trithiosulfate 4%; The percentage by weight in the solution is 4% sodium dihydrogen phosphate and 96% moisture. The powder composition and its percentage by weight in the powder in the number 2# experimental group are quicklime 54%, kaolinite 22%, ammonium phosphate 18%, sodium trithiosulfate 6%; The percentage by weight in the solution is 8% sodium dihydrogen phosphate and 92% moisture. The powder composition and its percentage by weight in the powder in the number 3# experimental group are quick...

Embodiment 3

[0052] According to the detection results of the heavy metal content of waste rock tailings in this mining area, the average content of zinc (Zn) is 24200mg / kg; the average content of lead (Pb) is 22400mg / kg. The amount of powder added per 100Kg of waste rock tailings is 4Kg, and the amount of liquid agent added is 1L. The powder composition and its percentage by weight in the powder in the number 1# experimental group are quicklime 55%, montmorillonite 22%, ammonium phosphate 15%, sodium trithiosulfate 8%, the liquid composition and its The percentage by weight in the solution is 4% sodium dihydrogen phosphate and 96% moisture. The powder composition and its percentage by weight in the powder in the number 2# experimental group are quicklime 54%, montmorillonite 22%, ammonium phosphate 18%, sodium trithiosulfate 6%, the liquid composition and its The percentage by weight in the solution is 8% sodium dihydrogen phosphate and 92% moisture. The powder composition and its perce...

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Abstract

The invention discloses a stabilization medicament of lead-zinc waste rocks and tailings as well as preparation and application of the stabilization medicament. The stabilization medicament is prepared from powder and liquid; the powder is prepared from the following components according to the weight percent in the powder: 45 percent to 60 percent of quick lime, 18 percent to 26 percent of a clay ore material, 15 percent to 23 percent of a phosphorus-based compound and 4 percent to 8 percent of sodium trithiosulfate; the liquid is prepared from the following components according to the weight percent in the liquid: 4 percent to 12 percent of a phosphorus-based compound and 88 percent to 96 percent of water. The stabilization medicament disclosed by the invention can be used for treating the problem of dissolving of heavy metal in the lead-zinc waste rocks and tailings and lead-zinc ions can be converted into an ore type compound, so that the dissolving speed of the lead-zinc ions under a leaching state is reduced, and furthermore, risks of secondary pollution caused by the fact that the tailings are discharged are effectively controlled.

Description

technical field [0001] The invention belongs to the field of contaminated soil remediation, and in particular relates to a stabilizing agent for treating waste rock tailings in lead-zinc mining areas, so as to stabilize lead and zinc and reduce the dissolution of lead and zinc as heavy metal pollutants. Background technique [0002] With the further development of the economy and industrialization process, the demand for mineral resources is increasing day by day, and the development of human mine resources is also becoming more frequent and deeper. Environmental pollution from mining activities mainly includes solid waste pollution, mine water pollution, and mine dust pollution. For metal mines, the tailings discharged from the beneficiation plant are one of the main solid wastes of the mine. Abandoned lead-zinc tailings are usually associated with sulfide minerals. During the process of being exposed to storage in the air, sulfide minerals usually form sulfuric acid and s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/34C04B18/12B09C1/08
CPCB09C1/08C04B18/12C04B28/344C04B22/064C04B14/104C04B22/147C04B22/002Y02W30/91
Inventor 吕正勇魏丽杨斌赫冯国杰李淑彩朱湖地郭明达甄胜利
Owner BEIJING GEOENVIRON ENG & TECH
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