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High-strength nickel slag-based solid waste cementing material and preparation method thereof

A technology of cementitious material and blast furnace nickel slag, which is applied in the field of building materials, can solve the problems of transferring to surrounding soil and groundwater, reducing the durability of cement test blocks, and the utilization rate of less than 10%, so as to solve the utilization rate of nickel slag. Low, dense voids, high solid waste utilization effect

Active Publication Date: 2021-04-06
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This stacking method not only occupies a large amount of land, but also the soluble phosphorus and fluorine in phosphogypsum will be transferred to the surrounding soil and groundwater under the erosion of rainwater, causing serious pollution to the surrounding ecological environment
Worldwide, only 15% of phosphogypsum is recycled, and the remaining 85% is discharged as solid waste. The utilization rate of phosphogypsum in my country is less than 10%.
But it uses a variety of activators, the cost is too high, the operation is complicated, and it will reduce the durability of the cement test block

Method used

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  • High-strength nickel slag-based solid waste cementing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Put the steel slag, blast furnace nickel slag, and phosphogypsum in a crusher to crush, and the crushed particle size is 2-10mm.

[0029] 2) Take 100 parts of crushed steel slag and 400 parts of blast furnace nickel slag in a wet mill, add 150 parts of water, and then add 3 parts of naphthalene-based water reducer, and wet grind at 400r / min for 20min to a particle size below 5μm. A slurry is prepared.

[0030] 3) Take the slurry obtained in step 2) in a mixing pot, add 400 parts of crushed phosphogypsum, use a cement mortar mixer to stir evenly for 15 seconds, and finally mix in 100 parts of cement clinker and 160 parts of externally mixed The water was continuously stirred for 6 minutes (stir slowly at a speed of 65r / min for 3 minutes, stop for 15 seconds, then stir quickly at a speed of 130r / min for 3 minutes), to obtain a nickel slag-based solid waste cementitious material.

Embodiment 2

[0032] 1) Put the steel slag, blast furnace nickel slag, and phosphogypsum in a crusher to crush, and the crushed particle size is 2-10mm.

[0033] 2) Take 100 parts of crushed steel slag and 450 parts of blast furnace nickel slag in a wet mill, add 165 parts of water, and then add 3 parts of naphthalene-based water reducer, and wet grind at 400r / min for 30min to a particle size of 5μm Next, a slurry was prepared.

[0034] 3) Take the slurry obtained in step 2) in a mixing pot, add 350 parts of crushed phosphogypsum, use a cement mortar mixer to stir evenly for 15 seconds, and finally mix in 100 parts of cement clinker and 140 parts of externally mixed The water was continuously stirred for 6 minutes (stir slowly at a speed of 65r / min for 3 minutes, stop for 15 seconds, then stir quickly at a speed of 130r / min for 3 minutes), to obtain a nickel slag-based solid waste cementitious material.

Embodiment 3

[0036] 1) Put the steel slag, blast furnace nickel slag, and phosphogypsum in a crusher to crush, and the crushed particle size is 2-10mm.

[0037]2) Take 100 parts of crushed steel slag and 500 parts of blast furnace nickel slag in a wet mill, add 180 parts of water, add 3 parts of naphthalene-based water reducing agent, and wet grind at 400r / min for 40min to a particle size below 5μm , to prepare slurry.

[0038] 3) Take the slurry obtained in step 2) in a mixing pot, add 300 parts of crushed phosphogypsum, use a cement mortar mixer to stir evenly for 15 seconds, and finally mix in 100 parts of cement clinker and 120 parts of externally mixed The water was continuously stirred for 6 minutes (stir slowly at a speed of 65r / min for 3 minutes, stop for 15 seconds, then stir quickly at a speed of 130r / min for 3 minutes), to obtain a nickel slag-based solid waste cementitious material.

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Abstract

The invention discloses a high-strength nickel slag-based solid waste cementing material and a preparation method thereof, and belongs to the field of building materials. The cementing material is prepared from blast furnace nickel slag and ardealite and is prepared from the following raw materials in parts by mass: 100-200 parts of steel slag, 400-500 parts of blast furnace nickel slag, 300-400 parts of ardealite, 100 parts of cement clinker, 300-320 parts of water and 1-3 parts of water reducing agent. The cementing material is applied to road engineering, the initial fluidity of a roadbed material can reach 190mm or above, the compressive strength of a cement test block in one day reaches 25Mpa or above, the compressive strength of the cement test block in 28 days reaches 45Mpa or above, and the cementing material has high working and durability. The method is simple to operate, high in solid waste utilization rate, energy-saving, environment-friendly and good in economy.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high-strength nickel slag-based solid waste cementitious material prepared from blast furnace nickel slag and phosphogypsum and a preparation method thereof. Background technique [0002] The output of industrial solid waste in my country is very large, and with the rapid development of the economy, the output of solid waste is also showing an increasing trend. According to statistics from the Ministry of Ecology and Environment, China's industrial solid waste output in 2019 was 3,542.68 million tons, while the comprehensive utilization of industrial solid waste in China in 2019 was only 1,949.35 million tons, and the comprehensive utilization rate of industrial solid waste was 55.02%. At present, most of the traditional solid waste disposal methods in our country are landfill and incineration, the land resources are overwhelmed, and the air quality canno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/21C04B11/26C04B11/30
CPCC04B7/21C04B11/30C04B11/266Y02P40/10
Inventor 李玉博杨启凡曾三海贺行洋苏英王迎斌秦景燕张权钢方娇林张路川程璐雷五宜
Owner HUBEI UNIV OF TECH
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