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Optimization method for proportioning of all solid waste filling materials for water resistance and stability in Dashui Mine

A technology of water stability and filling materials, applied in the direction of ratio control, instrument, control/regulation system, etc., can solve the problems of increasing the cost of filling and mining, the utilization rate of phosphogypsum is less than 5%, and poor water resistance, so as to improve economic benefits and environmental protection benefits, avoiding the risk of catastrophe and instability, and ensuring the effect of safe use

Active Publication Date: 2022-05-13
UNIV OF SCI & TECH BEIJING +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the harmful mineral components in phosphogypsum, which lead to low activity and poor water resistance, the current utilization rate of phosphogypsum is less than 5%, and most of the phosphogypsum is piled up.
At present, the method of improving the water resistance stability of the filling body is mainly to add fibers or additives and water resistance materials, which not only increases the cost of filling mining, but also complicates the mining process

Method used

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  • Optimization method for proportioning of all solid waste filling materials for water resistance and stability in Dashui Mine
  • Optimization method for proportioning of all solid waste filling materials for water resistance and stability in Dashui Mine
  • Optimization method for proportioning of all solid waste filling materials for water resistance and stability in Dashui Mine

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Embodiment 1: Phosphogypsum-slag fine powder-carbide slag system

[0075] To optimize the ratio of all solid waste filling materials for the phosphogypsum-slag micropowder-carbide slag system, the solid waste in the system is firstly dried and pulverized, and then the chemical composition analysis and particle size test are carried out. The analysis results of the chemical composition of phosphogypsum in the filling material of this system are shown in Table 1. Particle size gradation distribution curve see figure 2 .

[0076] Table 1: Analysis results of chemical composition of phosphogypsum

[0077] chemical composition P 2 o 5

Fe 2 o 3

Al 2 o 3

MgO CaO SO 4 2-

F acid insoluble matter content / % 1.47 0.48 0.36 2.44 28.6 49.07 0.87 10.17

[0078] The particle size distribution curve of slag powder in the phosphogypsum-slag powder-carbide slag system is shown in image 3 , it can be seen that the cont...

Embodiment 2

[0099] Example 2: Phosphogypsum-slag powder-carbide slag-copper tailings system

[0100] To optimize the ratio of solid waste filling materials for the phosphogypsum-slag powder-carbide slag-copper slag system, firstly, the solid waste in the system is dried, pulverized, and analyzed for chemical composition and particle size. The chemical composition of phosphogypsum as filling material in this system is shown in Table 4.

[0101] Table 4: Chemical composition results of phosphogypsum in the system of phosphogypsum-slag fine powder-carbide slag-copper slag

[0102] chemical composition P 2 o 5

Fe 2 o 3

Al 2 o 3

MgO CaO SO 4 2-

F acid insoluble matter content / % 1.76 0.48 0.28 2.44 30.64 53.52 0.45 6.67

[0103] See image 3 , the slag micropowder powder -45μm fine particle content accounts for 81.9%; the chemical composition of slag is shown in Table 5, quality factor Activity coefficient

[0104] Table 5...

Embodiment 3

[0126] Example 3: Phosphogypsum-slag powder-carbide slag-fly ash system

[0127] The material ratio optimization method of phosphogypsum-slag micropowder-carbide slag-fly ash system involves drying, grinding, chemical composition analysis and particle size testing of solid waste in the system.

[0128] The chemical composition of phosphogypsum in the filling material of phosphogypsum-slag powder-carbide slag-fly ash system is shown in Table 7.

[0129] Table 7: Chemical composition of phosphogypsum in phosphogypsum-slag fine powder-carbide slag-fly ash system

[0130]

[0131] See image 3 , slag fine powder -45μm fine particle content is 81.9%;

[0132] The chemical composition of slag is shown in Table 8, quality factor Activity coefficient

[0133] Table 8: Chemical composition of slag in phosphogypsum-slag powder-carbide slag-fly ash system

[0134] chemical composition CaO SiO 2

Al 2 o 3

MgO SO 3

Fe 2 o 3

content / %...

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Abstract

The invention provides a method for optimizing the proportion of solid waste filling materials with water resistance and stability in Dashui Mine, relates to the technical field of solid waste utilization, can realize the optimal combination and synergistic effect of solid waste resources, and prepare filling materials that meet the water resistance requirements , to provide support for the safe, reliable and mass resource utilization of low-quality solid waste; the method includes: S1, preparing a number of mixed powders with different proportions, including phosphogypsum and blast furnace slag; S2, filling all the mixed powders Strength test and water resistance test, to obtain the test results of mixed powder with different proportions; S3. Establish the mathematical model of filling body strength and water resistance stability according to the test results; S4. Taking the cost of filling material as the optimization goal, the above two A mathematical model is used as a constraint to establish an optimization model for the proportion of solid waste filling materials; S5. Solve the model to obtain the optimal proportion of solid waste filling materials. The technical scheme provided by the invention is suitable for the process of mine filling.

Description

technical field [0001] The invention relates to the technical field of solid waste utilization, in particular to a method for optimizing the ratio of solid waste filling materials for water resistance and stability in Dashui Mine. Background technique [0002] With the rapid development of my country's economy and the continuous development and utilization of mineral resources, high-grade mineral resources with good mining technical conditions are increasingly exhausted, and more resources are faced with deep burial, high stress, rich water and poor stratum conditions. The primary choice for safety, environmental protection and green mining of filling mining. The tailing sand cemented filling body with cement as the gelling agent has low strength and poor fluidity, resulting in a large amount of cementitious materials and high mining costs. [0003] With the promulgation of my country's new environmental protection law and strict management, high-activity blast furnace slag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14G05D11/00
CPCC04B28/143G05D11/00C04B2111/00198C04B2201/50C04B18/0481C04B18/141C04B18/12C04B18/08
Inventor 肖柏林郭斌温震江尹升华巴蕾杨晓炳高谦李胜辉陈彦亭胡亚军吴凡杨航
Owner UNIV OF SCI & TECH BEIJING