Red mud-based cementitious material activator and red mud-based goaf filling material

A technology of filling materials and activators, which is applied in the field of resource utilization of industrial waste, to achieve the effect of solving the problem of emptying, good fluidity and compressive strength, and inhibiting volume shrinkage

Active Publication Date: 2022-03-18
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the defects of resource utilization of red mud and current filling cementitious materials in the prior art, the present invention aims at resource utilization of red mud while partially replacing high-energy-consuming cement and solving some shortcomings of current filling methods

Method used

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  • Red mud-based cementitious material activator and red mud-based goaf filling material
  • Red mud-based cementitious material activator and red mud-based goaf filling material
  • Red mud-based cementitious material activator and red mud-based goaf filling material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This example is shown in Table 1.

[0044] Table 1 Composite excitation agent Example 1 raw material composition

[0045] raw material Mass Desulfurization plaster 30 Fly ash 20 soda ash 5 Marabrit 10 Blister base 10 Sodium dihydrogen phosphate 10 Aluminum 15

[0046] Composite excitation agent Example 2

[0047] This example is shown in Table 2.

[0048] Table 2 Composite excitation agent Example 2 raw material composition

[0049]

[0050]

[0051] Composite excitation agent Example 3

[0052] The raw material composition of this example of the redispic glycinated material composite excitation agent is shown in Table 3.

[0053] Table 3 Composite excitation agent Example 3 feedstock composition

[0054] raw material Mass Desulfurization plaster 35 Fly ash 15 soda ash 5 Marabrit 12 Blister base 8 Sodium dihydrogen phosphate 8 Aluminum 17

[0055] The desulfurization gypsum...

Embodiment 2

[0064] The composition of the filling material of this example is shown in Table 5.

[0065] Table 5 Precautions of Ultrafining Materials in Table 5

[0066] raw material Mass Red mud 40 Steel slag 10 Composite excitation agent Example 1 22 42.5 ordinary silicate cement 10 Basalt fiber short cutting yarn 9 云 母 增 聚 聚 9

Embodiment 3

[0068] The raw material composition of the filling material of this example is shown in Table 6.

[0069] Table 6 Extrame 3 of Ultra Chilai Base Film Area

[0070] raw material Mass Red mud 30 Steel slag 20 Composite excitation agent Example 1 18 42.5 ordinary silicate cement 10 Basalt fiber short cutting yarn 11 云 母 增 聚 聚 11

[0071] The preparation method of the lymid enhanced polypropylene masterbatch is as follows:

[0072] The sericite powder and polypropylene particles are weighed by mass ratio 1: 1, mix uniform, melt, extruder, and cool down to the pelletizer to cut the junky to enhance the polypropylene parent.

[0073] The preparation method of Examples 1 to 3 of the extraction materials of the red mud base filming area is as follows:

[0074] Each raw material was weighed in accordance with the composition of Tables 4 to 6, first put redishes, steel slag, composite excitation and 42.5 common silicate cement in a cement ball mil...

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Abstract

The invention discloses a red mud-based gelling material activator and a red mud-based goaf filling material. The red mud-based activator for cementitious materials includes the following components: desulfurized gypsum, fly ash, soda ash, mirabilite, saponin, sodium dihydrogen phosphate and bauxite. The red mud-based goaf filling material includes red mud-based cementitious material activator, red mud, steel slag, cement, basalt fiber chopped strands and sericite-reinforced polypropylene masterbatch. By using the composite activator of the invention, the red mud can be effectively excited to form a filling material with stable structure and performance. The filling material has good fluidity and compressive strength, and can meet the needs of mine goaf filling. Compared with traditional cement-based cementitious materials, the red mud-based goaf filling material provided by the present invention also has expansibility, can inhibit volume shrinkage during cement hardening, and can solve the void problem existing in the current filling area.

Description

Technical field [0001] The present invention relates to the field of industrial waste resource utilization, and Background technique [0002] The vacuum area leaving after the deposition of the deposit will be accumulated into a tail mine through the mineral tailings. The metal tailings continues and a large amount of accumulation, which not only causes great pressure to the land, but also has a waste of resources, but some heavy metal ions in tailings will have serious environmental pollution, and there is a safety hazard. It can be seen that the current mining model is urgent to handle properly. The technical solution currently used in the vacuum area is two: water sand mix filling and cementing cream filling. [0003] In general, the current filling method has the following questions: [0004] Poor filling: The cement currently used as the main gelling material is increasingly developing low, high-end strength development, although research shows that the surface area of ​​low...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/16C04B28/02C04B111/20
CPCC04B40/0039C04B28/02C04B2111/20C04B2111/00724C04B2111/00017C04B22/145C04B18/08C04B22/10C04B22/147C04B22/00C04B22/16C04B14/303C04B18/0409C04B18/142C04B14/46C04B16/04
Inventor 李鹏袁苾程陈思成龚炜庭陈丽刘宇晴齐泽心
Owner WUHAN UNIV OF TECH
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