All-solid-waste cementing material synergistically prepared from steel slag and multi-objective optimization method

A multi-objective optimization and cementitious material technology, which is applied in the field of steel slag collaborative preparation of solid waste cementitious materials and multi-objective optimization, can solve the problems of low technical content, low added value, and difficult resource utilization, and achieve low cost Effect

Active Publication Date: 2020-01-07
UNIV OF SCI & TECH BEIJING +1
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  • Abstract
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Problems solved by technology

The current utilization rate is 40% to 50%, most of which are extensive utilization, not only low technical content, but also low added value
Especially the semi-dry desulfurization by-product desulfurization ash, due to the unstable mineral components of calcium sulfite, makes resource utilization more difficult. Currently, except for a small amount of cement admixtures, most of them are stacked

Method used

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  • All-solid-waste cementing material synergistically prepared from steel slag and multi-objective optimization method
  • All-solid-waste cementing material synergistically prepared from steel slag and multi-objective optimization method
  • All-solid-waste cementing material synergistically prepared from steel slag and multi-objective optimization method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A multi-objective optimization method for preparing ultrafine tailings and solid waste cementitious materials with steel slag synergistically desulfurized gypsum, including the following steps:

[0069] Step 1. Analysis and treatment of all solid waste cementitious materials test materials

[0070]Drying, screening and grinding of the solid waste materials and ultra-fine tailings filling aggregates prepared from steel slag and industrial by-product gypsum to prepare solid waste cementitious materials, and the particle size analysis and eigenvalue calculation of the materials are carried out.

[0071] (1) The particle size distribution curve of steel slag powder is shown in figure 2 . Thus, the average particle size d of steel slag powder is obtained av = 28.84 μm, d 10 = 4.02 μm, d 30 = 10.41 μm, d 50 = 20.09 μm, d 60 = 25.66 μm, d 90 =58.76μm; where, d 10 Indicates that particles smaller than the average particle size account for 10% of the total number of par...

Embodiment 2

[0115] A multi-objective optimization method for preparing ultrafine tailings and solid waste cementitious materials with steel slag and fluorine gypsum, including the following steps:

[0116] Step 1. Analysis and treatment of all solid waste cementitious materials test materials

[0117] Drying, screening and grinding of the solid waste materials and ultra-fine tailings filling aggregates prepared from steel slag and industrial by-product gypsum to prepare solid waste cementitious materials, and the particle size analysis and eigenvalue calculation of the materials are carried out.

[0118] (1) The particle size distribution curve of steel slag powder is shown in figure 2 . Thus, the average particle size d of steel slag powder is obtained av = 28.84 μm, d 10 = 4.02 μm, d 30 = 10.41 μm, d 50 = 20.09 μm, d 60 = 25.66 μm, d 90 =58.76μm; non-uniformity coefficient C u = d 60 / d 10 =6.38, coefficient of curvature The fineness of steel slag powder is 18%. The minera...

Embodiment 3

[0158] A multi-objective optimization method for preparing ultra-fine tailings and solid waste cementitious materials with steel slag and desulfurization ash, including the following steps:

[0159] Step 1. Analysis and treatment of all solid waste cementitious materials test materials

[0160] Drying, screening and grinding of the solid waste materials and ultra-fine tailings filling aggregates prepared from steel slag and industrial by-product gypsum to prepare solid waste cementitious materials, and the particle size analysis and eigenvalue calculation of the materials are carried out.

[0161] (1) The particle size distribution curve of steel slag powder is shown in figure 2 . Thus, the average particle size d of steel slag powder is obtained av = 28.84 μm, d 10 = 4.02 μm, d 30 = 10.41 μm, d 50 = 20.09 μm, d 60 = 25.66 μm, d 90 =58.76μm; non-uniformity coefficient C u = d 60 / d 10 =6.38, coefficient of curvature The fineness of steel slag powder is 18%. The m...

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Abstract

The invention provides an all-solid-waste cementing material synergistically prepared from steel slag and a multi-objective optimization method, and relates to the technical field of mine field filling; large-scale and high-added-value resource utilization of steel slag and industrial byproduct gypsum low-quality solid waste in filling mining can be realized, so that the tailing filling mining cost is reduced, and the economic benefit and the environmental protection benefit of filling mining are improved. The method comprises the steps: preparing the all-solid-waste cementing material from the steel slag, industrial by-product gypsum and mineral slag, filling by taking mine superfine full tailings as aggregate, and establishing a multi-objective optimization model by taking the strength cost performance of a filling body, the cost of the filling material and the utilization rate of the mineral slag as optimization objectives and taking the strength and the volume expansion rate of thefilling body as constraint conditions; and according to the multi-objective optimization model, obtaining the optimal proportion of the components in the all-solid-waste cementing material. The method provided by the invention is suitable for a mine field filling process.

Description

【Technical field】 [0001] The invention relates to the technical field of mine filling, in particular to a method for synergistically preparing all-solid waste cementitious materials with steel slag and a multi-objective optimization method. 【Background technique】 [0002] With the rapid development of my country's national economy and the continuous development of resources, high-grade ore resources and good mining technical conditions are increasingly depleted, and will face deep buried, high ground pressure, rich groundwater and difficult to mine ore bodies. Therefore, the filling mining method is the first choice. The strength of the ultra-fine full tailings cemented filling body using cement cementitious materials is extremely low, and the transport resistance of the filling slurry pipe is relatively large. The mining cost of cemented tailings filling method remains high, which reduces the economic benefits of filling mining and hinders the popularization and application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/14C04B18/12G06Q10/04G06Q50/02
CPCC04B18/12C04B18/141C04B18/142C04B28/142C04B28/143C04B28/144C04B2201/50G06Q10/04G06Q50/02Y02W30/91
Inventor 杨晓炳温震江肖柏林郭斌吴凡尹升华高谦李胜辉胡亚军涂光富
Owner UNIV OF SCI & TECH BEIJING
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