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Alkali-activated cementing material doped with high-silicon iron tailings and red mud and preparation method of alkali-activated cementing material

A technology of cementitious materials and iron tailings, applied in the field of alkali-activated inorganic non-metallic cementitious materials, can solve the problems of waste of space, resources and environment, low comprehensive utilization rate, pollution, etc.

Inactive Publication Date: 2021-04-30
NORTHEASTERN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the comprehensive utilization rate of high-silicon iron tailings is low, and the stacking of tailings not only wastes space resources but also causes serious environmental pollution problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]According to the GBT17671-1999 cement gum test standard, 30 parts of high silicon-type iron tailings and 15 red muds, 35 parts of coal gangue were added to the mixer, and the mixture was mixed with 120 ± 5 rpm and mixed 30s and mixed well, and then 15 Solved skeletons in 5 parts of NaOH and NA2SiO3Mix (Na0h and NA2SiO3The mass ratio is 1:15) The preparation solution is completely dissolved in the mixer medium and stirring 30s, the next 30S is completely poured into the stirrer, stop 30s, stir the uneven material to stir well, and simultaneously The blades and the slurry on the pan were scraped into the middle, and then the mixture was stirred at a rate of 290 ± 5 rpm of / min, that is, the base can be obtained to obtain a base excitation gelling material slurry. The mixed high silicon-type iron tail mite will be stirred, and the alkali of red mud is planted in the mold. After 24 hours, it can condense, that is, the mold can be treated, placed in the maintenance device for main...

Embodiment 2

[0041]According to the GBT17671-1999 cement gum test standard, 40 high silicon-type iron tailings and 15 red muds, 25 parts of coal gangue were added to the mixer, and the mixture was stirred at a mixture of 120 ± 5 rpm and the mixture was mixed, and then 17 Silk skeleton soluble in 3 parts of NaOH and NA2SiO3Mix (Na0h and NA2SiO3The mass ratio is 1:15) The preparation solution is completely dissolved in the mixer medium and stirring 30s, the next 30S is completely poured into the stirrer, stop 30s, stir the uneven material to stir well, and simultaneously The blades and the slurry on the pan were scraped into the middle, and then the mixture was stirred at a rate of 290 ± 5 rpm of / min, that is, the base can be obtained to obtain a base excitation gelling material slurry. The mixed high silicon-type iron tail mite will be stirred, and the alkali of red mud is planted in the mold. After 24 hours, it can condense, that is, the mold can be treated, placed in the maintenance device fo...

Embodiment 3

[0043]According to GBT17671-1999 cement tape, 50 high silicon-type iron tailings and 15 decimers 20 parts of coal gangue were added to the stirrer, and the mixture was stirred at 120 ± 5 rpm, and mixed 30s, and then 10 parts. Alkali residue in 5 parts of NaOH and NA2SiO3Mix (Na0h and NA2SiO3The mass ratio is 1:15) The preparation solution is completely dissolved in the mixer medium and stirring 30s, the next 30S is completely poured into the stirrer, stop 30s, stir the uneven material to stir well, and simultaneously The blades and the slurry on the pan were scraped into the middle, and then the mixture was stirred at a rate of 290 ± 5 rpm of / min, that is, the base can be obtained to obtain a base excitation gelling material slurry. The mixed high silicon-type iron tailite, red mud alkali is bracked into the mold in the mold, and then coagulates in the mold 24 hours, that is, it can be treated, placed in the maintenance device for maintenance, maintenance temperature is 23 ± 1 ° C...

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Abstract

The invention belongs to the field of alkali-activated inorganic nonmetal cementing materials, and particularly relates to an alkali-activated cementing material doped with high-silicon iron tailings and red mud and a preparation method of the alkali-activated cementing material. The material comprises the following raw materials: 30 to 50 parts of high-silicon iron tailings; 15 to 20 parts of red mud; 20 to 35 parts of coal gangue; 10 to 15 parts of alkaline residues; and 1-5 parts of an alkaline activator. The preparation method comprises the following steps: adding the high-silicon iron tailings, the red mud and the coal gangue into a stirrer, performing uniform stirring, dissolving the alkaline residues into the alkaline exciting agent, adding the mixture into the stirrer after the alkaline residues are completely dissolved, performing stirring and mixing at a low speed, pouring the standard sand into a stirring pot, stopping stirring, and performing stirring again to obtain alkali-activated cementing material slurry; injecting the obtained alkali-activated cementing material slurry into a mold, carrying out coagulation and hardening to remove the mold, and performing curing in a curing device to obtain the target product. The concrete is good in gelling property, ideal in impermeability and high in compressive strength, and has a micro-expansion compensation function.

Description

Technical field[0001]The present invention is a base in which the inorganic non-metallic cementoiding material is, and more particularly to a base bonded to a high silicon-type iron tailite and a red mud gel material and a preparation method thereof.Background technique[0002]After entering the 21st century, the effective use of resources is particularly important, and the secondary use of tail mines is more important. In order to solve the above problems, the comprehensive utilization of tailings is improved, and its usage has become a research hotspot in recent years. In the prior art, the comprehensive utilization of high silicon type tailings is low, but the tailings stack not only has a waste of space resources, but also has a serious environmental pollution issue.Inventive content[0003]The present invention aims to overcome the deficiencies of the prior art, which provides a good gel, anti-seepage, antifreeze performance, high compressive strength, and has a high silicon-type i...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B111/20C04B111/27
CPCC04B28/006C04B2111/00017C04B2111/20C04B2201/50C04B2111/2015C04B2111/27C04B2111/00293C04B18/12C04B22/062C04B18/0427C04B22/00C04B18/0409
Inventor 顾晓薇胡子扬刘剑平迟浩峰王海宇
Owner NORTHEASTERN UNIV
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