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Grinding aid for preparing cementitious materials for mine filling and dry heaping

A technology of cementitious materials and mine filling, which is applied in the field of preparation of mine filling, grinding aids, and grinding aids for cementitious materials for dry stacking. The effect of increasing early strength and increasing late strength

Active Publication Date: 2017-09-26
SINOSTEEL MAANSHAN INST OF MINING RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of cementitious material for mine filling and dry stacking to solve the problem that the mixed material composed of water slag, quicklime, water glass, etc. is easy to ball and hard to grind in the grinding process. Grinding aids can significantly improve the fluidity of the cementitious material, increase the grinding efficiency of the ball mill, increase the output of the mill, can significantly improve the early strength of the cementitious material, and appropriately increase the later strength

Method used

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  • Grinding aid for preparing cementitious materials for mine filling and dry heaping
  • Grinding aid for preparing cementitious materials for mine filling and dry heaping
  • Grinding aid for preparing cementitious materials for mine filling and dry heaping

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1 is used for preparing the grinding aid of mine filling, dry stacking cementitious material, and its composition is as follows:

[0031] Methacrylic acid modified polymeric polyol 25%

[0032] Diethanol Monoisopropanolamine 10%

[0033] Molasses 15%

[0034] Sodium Thiocyanate 7%

[0035] Sodium metaaluminate 7%

[0036] Sodium Fluosilicate 7%

[0037] The balance is water, and the total amount is 100%.

[0038] The preparation method of methacrylic acid-modified polymer polyol is as follows: in the reaction kettle, add 1.3 parts of methacrylic acid and 1 part of polymer polyol, stir evenly, and react at 70-80°C for 1.5 hours to obtain methacrylic acid-modified polymerized polyols.

[0039] The preparation method of the present invention is as follows: adding sodium thiocyanate, sodium metaaluminate and sodium fluorosilicate into water according to the formula ratio, stirring and dissolving, adding sucrose molasses, N,N-bis(2- Hydroxyethyl)-2-propanol...

Embodiment 2 to Embodiment 6

[0041] The contents of each component specified in Table 1 are prepared according to the method of Preparation Example 1, and the products of Example 2 to Example 6 are prepared to obtain grinding aid products 2 to 6 of cementitious materials for mine filling and dry stacking respectively. .

[0042] Table 1 Grinding aid product formula (%)

[0043]

[0044] The grinding aid products prepared in Examples 1 to 6 were mixed into the mixed material at 0.03% by weight of the gelling material, and ball milled to obtain 6 kinds of gelling materials. Stir and mix the gelling agent with the tailings at a concentration of 68% at a lime-sand ratio of 1:8, which is the slurry for mine filling. % of the curing box, demould after 24 hours, and continue to maintain in the constant temperature and humidity box under this condition, and detect the compressive strength of different breeding ages. The product produced with cement grinding aid is used as a comparison product, and the experi...

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Abstract

The invention discloses a grinding aid for preparing a cementing material for filling and dry stacking of mines. The grinding aid comprises the following raw material components in percentage by mass: 20%-30% of modified polymeric glycol, 5%-15% of diethanolisopropanolamine, 10%-20% of molasses, 5%-10% of sodium sulfocyanate, 5%-10% of sodium metaaluminate, 5%-10% of sodium fluosilicate and the balance of water. According to the grinding aid provided by the invention, the problems that a mixed material of water granulated slag, quick lime, water glass and the like is liable to cause ball pasting and is difficult to be finely ground in a grinding process are solved, the fluidity of the cementing material can be remarkably improved, the grinding efficiency of a ball mill can be improved, the machine-hour yield of the ball mill can be increased, the early strength of the cementing material can be remarkably improved, and the long-term strength of the cementing material can be properly improved.

Description

technical field [0001] The invention belongs to the technical field of powder preparation, and specifically relates to a grinding aid, in particular to a grinding aid for preparing cementitious materials for mine filling and dry stacking by grinding water slag, quicklime and other mixed materials. Background technique [0002] With the rapid development of modern technology and industrial production, the demand for minerals has increased rapidly, and the development and utilization of metal mineral resources have caused surface damage and tailings discharge, which has brought many problems such as resources, environment and safety. By using full tailings to effectively fill the goaf, the environmental and safety problems caused by mining of mineral resources can be fundamentally solved, and at the same time, the mineral resources can be fully recovered, which is beneficial to the promotion of mining industry and resources, environment, safety and economy. The coordinated dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/24C04B103/52
CPCC04B40/0039C04B2103/52C04B24/24C04B24/122C04B24/10C04B22/14C04B22/126C04B22/0093
Inventor 杨晓军徐修平刘龙徐静华超朱君星曾申进李波
Owner SINOSTEEL MAANSHAN INST OF MINING RES
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