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

A filling material and activator technology, which is applied in the field of industrial waste resource utilization to achieve the effects of inhibiting volume shrinkage, good fluidity and compressive strength, and solving the problem of voiding

Active Publication Date: 2021-07-27
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 cementing material activator and red mud-based goaf filling material
  • Red mud-based cementing material activator and red mud-based goaf filling material
  • Red mud-based cementing material activator and red mud-based goaf filling material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The raw material composition of the red mud-based cementitious material composite activator in this example is shown in Table 1.

[0044] Table 1 composite activator embodiment 1 raw material composition

[0045] raw material parts by mass Desulfurization gypsum 30 fly ash 20 soda ash 5 Glauber's salt 10 Natron 10 Sodium dihydrogen phosphate 10 Bauxite 15

[0046] Composite activator embodiment 2

[0047] The raw material composition of the red mud-based cementitious material composite activator in this example is shown in Table 2.

[0048] Table 2 Composite activator embodiment 2 raw material composition

[0049]

[0050]

[0051] Composite activator embodiment 3

[0052] The raw material composition of the red mud-based cementitious material composite activator in this example is shown in Table 3.

[0053] Table 3 composite activator embodiment 3 raw material composition

[0054] raw materi...

Embodiment 2

[0064] The raw material composition of the red mud-based goaf filling material in this example is shown in Table 5.

[0065] Table 5 Composition of Red Mud-Based Goaf Filling Material Example 2 Raw Materials

[0066] raw material parts by mass red mud 40 steel slag 10 Composite activator embodiment 1 22 42.5 Ordinary Portland cement 10 Basalt fiber chopped strand 9 Sericite reinforced polypropylene masterbatch 9

Embodiment 3

[0068] The raw material composition of the red mud-based goaf filling material in this example is shown in Table 6.

[0069] Table 6 Raw material composition of embodiment 3 of red mud-based goaf filling material

[0070] raw material parts by mass red mud 30 steel slag 20 Composite activator embodiment 1 18 42.5 Ordinary Portland cement 10 Basalt fiber chopped strand 11 Sericite reinforced polypropylene masterbatch 11

[0071] The preparation method of sericite reinforced polypropylene masterbatch is as follows:

[0072] Weigh sericite powder and polypropylene granules according to a mass ratio of 1:1, mix them evenly, melt them, blend and extrude them with an extruder, cool and drag them to a pelletizer and cut them into sericite-reinforced polypropylene masterbatches.

[0073] The preparation method of Examples 1-3 of the red mud-based goaf filling material is as follows:

[0074] Weigh each raw material according to the...

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Abstract

The invention discloses a red mud-based cementing material activator and a red mud-based goaf filling material. The red mud-based cementing material activator comprises the following components: desulfurization gypsum, fly ash, sodium carbonate, mirabilite, sodium silicate, sodium dihydrogen phosphate and bauxite. The red mud-based goaf filling material comprises a red mud-based cementing material activator, red mud, steel slag, cement, basalt fiber chopped yarns and sericite reinforced polypropylene master batches. According to the invention, red mud can be effectively excited by adopting the composite exciting agent disclosed by the invention, a filling material with stable structure and performance is formed, and the filling material has good flowability and compressive strength and can meet the filling requirements of a mine goaf; and compared with a traditional cementing material with cement as a main component, the red mud-based goaf filling material provided by the invention also has expansibility, can inhibit volume shrinkage in a cement hardening process, and can solve the problem of void in a current filling area.

Description

technical field [0001] The invention relates to the technical field of resource utilization of industrial waste, in particular to a red mud-based gelling material activator and a red mud-based goaf filling material. Background technique [0002] In the goaf that will be left after the mining of the ore deposit, the tailings after mineral processing will be piled up into a tailings pool. The continuous and massive accumulation of metal tailings not only puts great pressure on the land and wastes resources, but also some heavy metal ions in the tailings will cause serious environmental pollution and pose a safety hazard. It can be seen that the current mining mode urgently needs to be properly dealt with. There are currently two technical solutions for goaf filling: water-sand mixed filling and cemented paste filling. [0003] In general, the current filling method has the following problems: [0004] Poor filling stability: At present, cement as the main cementitious mater...

Claims

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Application Information

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Patent Type & Authority Applications(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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