Electric furnace steel slag-based cement admixture or concrete admixture as well as preparation method and application thereof

A technology of electric furnace steel slag and mixed materials, which is applied in the direction of cement production, etc., can solve the problems of less than 30% of comprehensive utilization rate, ineffective utilization, pollution of the environment, etc., and achieve the improvement of late hydration activity, high hydration activity, and mixing low volume effect

Active Publication Date: 2020-09-22
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Steel slag is a kind of industrial waste slag produced in the process of steelmaking. At present, the annual discharge of steel slag in my country is about 100 million tons, but its utilization rate is low (the comprehensive utilization rate is less than 30%), resulting in a large amount of steel slag being piled up. , not only occupy land, but also pollute the environment
From the above chemical and mineral composition, it can be seen that electric furnace reduction slag (especially ladle furnace refining slag) has great potential as a cementitious material, but at present this important value has not been effectively utilized, but it is combined with other smelting waste slag Mixed together discharge, resulting in waste of resources, land occupation, environmental pollution

Method used

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  • Electric furnace steel slag-based cement admixture or concrete admixture as well as preparation method and application thereof
  • Electric furnace steel slag-based cement admixture or concrete admixture as well as preparation method and application thereof
  • Electric furnace steel slag-based cement admixture or concrete admixture as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] First, carry out the pretreatment of crushing-magnetic separation-secondary crushing-magnetic separation-coarse grinding-magnetic separation on the refined steel slag of ladle furnace, so that the particle size is 2 / kg of micropowder, namely obtain the electric furnace steel slag-based cement admixture or concrete admixture Example 1.

Embodiment 2

[0053] Firstly, the pretreatment of crushing-magnetic separation-secondary crushing-magnetic separation-coarse grinding-magnetic separation is carried out on the refined steel slag of ladle furnace, so that the particle size is less than 2mm, and the content of metal elemental iron is less than 1%; secondly, take 10 parts of three Ethylene glycol, 20 parts of molasses, 25 parts of sodium nitrate and 50 parts of water are uniformly mixed to prepare an admixture; then, 93 parts of pretreated refined steel slag are uniformly mixed with 2 parts of phosphogypsum and 5 parts of lithium slag, and 0.1 Parts of admixture are evenly sprayed or sprayed on the above-mentioned mixed solid material; finally, the above-mentioned material is ground in a ball mill to a specific surface area of ​​420±10m 2 / kg of micropowder, namely obtain the electric furnace steel slag-based cement admixture or concrete admixture Example 2.

Embodiment 3

[0055] First, carry out the pretreatment of crushing-magnetic separation-secondary crushing-magnetic separation-coarse grinding-magnetic separation on the refined steel slag of ladle furnace, so that the particle size is less than 2mm, and the content of metal elemental iron is less than 1%; secondly, take 8 parts of three Ethylene glycol, 15 parts of molasses, 17 parts of sodium nitrate and 60 parts of water were uniformly mixed to prepare an admixture; then, 87 parts of pretreated refined steel slag were uniformly mixed with 5 parts of phosphogypsum and 8 parts of lithium slag, and 0.15 100% admixture is evenly sprayed or sprayed on the mixed solid material; finally, the above material is ground in a ball mill to a fine powder with a specific surface area of ​​420±10m2 / kg, and the electric furnace steel slag-based cement admixture or concrete admixture is obtained Example 3.

[0056] The electric furnace steel slag-based cement admixture or concrete admixture prepared by the...

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Abstract

The invention discloses an electric furnace steel slag-based cement admixture or concrete admixture comprising the following components in parts by mass: 80-93 parts of ladle furnace refined steel slag, 2-8 parts of phosphogypsum, 5-12 parts of lithium slag and 0-0.2 part of an additive. The invention further provides a preparation method of the electric furnace steel slag-based cement admixture or concrete admixture and an application of the electric furnace steel slag-based cement admixture or concrete admixture in production and preparation of cement and concrete. The electric furnace reduction steel slag is utilized to the maximum extent, byproducts such as phosphogypsum and lithium slag are combined to serve as auxiliary components, the characteristics of self-hydration hardening andhigh adaptability are achieved, the superposition effect and synergistic efficient utilization of multiple kinds of waste are achieved, waste utilization is achieved, environmental protection is achieved, the cost is low, the cost performance is high, and the application prospect is wide.

Description

technical field [0001] The invention relates to the technical field of utilization of building material resources from industrial solid waste, and more specifically relates to an electric furnace steel slag-based cement mixture or concrete admixture, a preparation method and application thereof. Background technique [0002] Cement concrete is currently the largest and most widely used man-made building material, and it is still the main building material of human society for a long time. However, the cement industry consumes a lot of energy and resources, and the environmental load is serious, which has become a focus issue of great concern to the society. At this stage, from the national level and all walks of life's emphasis on energy conservation, emission reduction and environmental protection, the cement concrete industry is also developing in a sustainable direction that is green, low-consumption and environmentally friendly. [0003] Reducing the amount of cement or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/21C04B7/24C04B7/36C04B24/10C04B22/08C04B24/02C04B103/40C04B103/52
CPCC04B7/21C04B7/24C04B7/36C04B40/0039C04B2103/408C04B2103/52C04B24/10C04B22/085C04B24/023Y02P40/10
Inventor 赵计辉程子睿黄春龙
Owner SUN YAT SEN UNIV
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