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Tailing cementing filling material and preparation method thereof

A technology of cementing filling materials and tailings, which is applied in the field of tailings treatment, can solve the problems of various types, large differences in properties, poor consolidation performance, etc., and achieve excellent mechanical properties, high utilization rate of waste slag, and good compressive strength. Effect

Inactive Publication Date: 2020-01-10
厦门紫金矿冶技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are two major problems with cement as a cementitious material: one is that the consolidation performance of fine-grained materials such as tailings and sand and high mud content is poor, and the filling body consumes a lot to reach the design strength; the other is that cement slurry is easy to use. Segregated water and severe cement loss
However, there are no standards and specifications for alkali-activated cementitious materials on the market. There are many types and large differences in properties. The selection should be based on the requirements of the filling purpose and the properties of the material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A tailings cemented filling material is composed of neutralized slag of mine acid wastewater, ball-milled slag, activator, full flotation tailings and water in a mass ratio of 50:83:10:857:351, and a specific preparation method It includes the following steps:

[0033] (1) Weigh and mix the whole flotation tailings, neutralized slag, slag and activator according to the mass ratio, then add water according to the mass ratio, and then stir at a speed of 200r / min for 2-3min to obtain a filling slurry, Its slump is 26.8cm, and its fluidity is good, which can meet the requirements of filling self-flow;

[0034] (2) inject the above-mentioned filling slurry into the mold, and demold it after 2 to 3 days to obtain a filling test block;

[0035] (3) Place the above-mentioned filling test block in a standard curing room to a specified age to obtain the tailings cemented filling material that meets the filling requirements; the temperature in the above-mentioned standard curing ...

Embodiment 2

[0038] A tailings cemented filling material is composed of neutralized slag of mine acid waste water, ball-milled slag, activator, full flotation tailings and water in a mass ratio of 45:91:7:857:350, and a specific preparation method It includes the following steps:

[0039] (1) Weigh and mix the whole flotation tailings, neutralized slag, slag and activator according to the mass ratio, then add water according to the mass ratio, and then stir at a speed of 200r / min for 2-3min to obtain a filling slurry, Its slump is 28cm, with good fluidity, which can meet the requirements of filling self-flow;

[0040] (2) inject the above-mentioned filling slurry into the mold, and demold it after 2 to 3 days to obtain a filling test block;

[0041] (3) Place the above-mentioned filling test block in a standard curing room to a specified age to obtain the tailings cemented filling material that meets the filling requirements; the temperature in the above-mentioned standard curing room is ...

Embodiment 3

[0044] A tailings cemented filling material is composed of neutralized slag of mine acid wastewater, ball-milled slag, activator, graded tailings and water in a mass ratio of 50:83:10:857:300, and the specific preparation method includes the following step:

[0045] (1) Weigh and mix the classified tailings, neutralized slag, slag and activator according to the mass ratio, then add water according to the mass ratio, and then stir at a speed of 200r / min for 2-3min to obtain a filling slurry, which collapses The drop is 27.1cm, the fluidity is good, and it can meet the requirements of filling self-flow;

[0046] (2) inject the above-mentioned filling slurry into the mold, and demold it after 2 to 3 days to obtain a filling test block;

[0047] (3) Place the above-mentioned filling test block in a standard curing room to a specified age to obtain the tailings cemented filling material that meets the filling requirements; the temperature in the above-mentioned standard curing roo...

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Abstract

The invention discloses a tailing cementing filling material and a preparation method thereof, wherein the tailing cementing filling material comprises mine acid wastewater neutralizing residue, ball-milled slag, an excitant, tailings and water according to a mass ratio of 45-70:65-95:5-15:830-870:300-400. According to the invention, the method completely utilizes the existing waste residues of mines and smelting plants, and has characteristics of high waste residue utilization rate, excellent mechanical property and good flowability.

Description

technical field [0001] The invention belongs to the technical field of tailings treatment, and in particular relates to a tailings cemented filling material and a preparation method thereof. Background technique [0002] As an important part of green scientific mining in mines, backfill mining can not only effectively alleviate or prevent the movement of surrounding rock and surface subsidence, and achieve maximum recovery and utilization of mineral resources, but also gradually turn to deep backfill mining to prevent large-scale rock pressure and prevent gas accumulation. Or gob spontaneous combustion, etc. When the national economy is sluggish, especially when the price of bulk minerals is low, the increased mining cost of mine filling makes many mining enterprises unbearable, and reducing the filling cost has become the key to the survival of mining enterprises. The cost of filling mainly consists of initial capital construction and equipment investment, filling material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
CPCC04B28/006C04B2111/00017C04B2111/00724C04B2201/50C04B18/12C04B18/141C04B18/142C04B22/064C04B22/062C04B22/10C04B22/00
Inventor 许涛付毅王春黄怀国巫雨田邹南荣黄丽娟
Owner 厦门紫金矿冶技术有限公司
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