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Method for preparing building material from metallurgy slag

A technology of metallurgical slag and building materials, applied in the field of comprehensive utilization of metallurgical slag and gypsum materials to manufacture building materials, can solve the problems of low strength and poor durability, achieve high strength, overcome fatal defects, and simple production process

Active Publication Date: 2017-02-22
韩涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a method of using metallurgical slag to prepare building materials. The method combines metallurgical slag and gypsum materials to at least solve the shortcomings of low strength and poor durability of existing gypsum products

Method used

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  • Method for preparing building material from metallurgy slag
  • Method for preparing building material from metallurgy slag
  • Method for preparing building material from metallurgy slag

Examples

Experimental program
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Embodiment 1

[0044] The specific surface area will be 450 m 2 / kg titanium gypsum 400g (40%), specific surface area 600 m 2 / kg water-quenched granulated blast furnace slag 300g (30%), specific surface area 580m 2 / kgP·O42.5 50g (5%) of cement and 250g (25%) of river sand with a fineness modulus of 2.8 are dry mixed in a mixer for 3 minutes; then add 180g of water (18% of the dry mass of all solid materials) , an additional 1.5g of alkaline activator (accounting for 0.5% of the water-quenched granulated blast furnace slag) was added to the water, and wet mixed for 10 minutes; after standing for 15 minutes, the pressure was maintained at 40MPa for 30s to obtain a super-strong material body; in the concrete curing room 28 days of natural conservation to obtain ultra-high-strength building material K 1 , after standing still for 1h, curing in saturated steam at 75°C for 6h, the super-high-strength building material K 2 , compressive strength see image 3 .

Embodiment 2

[0046] Put 2500g of water-quenched granulated blast furnace slag and 2500g of waste model gypsum into a 500×500mm standard ball mill for grinding for 50 minutes to obtain a specific surface area of ​​618 m 2 / kg of mixture, take 620g of mixture (wherein water-quenched granulated blast furnace slag accounts for 31% of the total dry basis material, waste model gypsum accounts for 31% of the total dry basis material), and the specific surface area is 680 m 2 / kg P·O4 2.5 cement 80g (accounting for 8% of the total dry basis material) and 300g of river sand with a fineness modulus of 2.8 (accounting for 30% of the total dry basis material) are dry mixed in the mixer for 4min; then add 130g of water (accounting for 13% of the total dry basis material), adding an additional 1.8g of alkaline activator (accounting for 0.6% of the water-quenched granulated blast furnace slag) in the water, wet mixing for 8min; after standing for 30min, keep the pressure at 45MPa for 15s , to obtain a su...

Embodiment 3

[0048] Put 2800g of water-quenched granulated blast furnace slag and 2200g of fluorine gypsum into a 500×500mm standard ball mill for grinding for 65min to obtain a specific surface area of ​​662m 2 / kg of mixture, take 670g of mixture (water quenched granulated blast furnace slag accounts for 37.5% of the total dry basis material, fluorine gypsum accounts for 29.5% of the total dry basis material), and the specific surface area is 500 m 2 / kg P·O4 2.5 cement 90g (accounting for 9% of the total dry basis material) and 240g of machine-made sand with a fineness modulus of 3.2 (accounting for 24% of the total dry basis material) are dry mixed in the mixer for 3min; then add 200g of water (accounting for 20% of the total dry basis material), add an additional 1.4g of alkaline activator (accounting for 0.47% of the water-quenched granulated blast furnace slag) in the water, wet mixing for 9min; after standing for 30min, keep the pressure at 45MPa for 50s , to obtain a super-strengt...

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Abstract

The invention relates to a method for preparing building material from metallurgy slag. The method comprises the following steps; preparing a dry blend from the metallurgy slag, gypsum or industrial byproduct gypsum, a calcium gel material and aggregates, adding water or excitant-dissolved water to prepare a wet blend, allowing the wet blend to stand, carrying out static pressure molding, and carrying out natural or steam curing to prepare the ultrahigh strength material. The method solves the problems of low activity and difficult utilization of low-grade metallurgy slag, the metallurgy slag is coupled with a large amount of gypsum or the industrial byproduct gypsum to prepare the ultrahigh strength building material with the compressive strength of 60-200 MPa. The ultrahigh strength material undergoes variation molding die methods to produce high-strength building bricks, high-strength road bricks, high-strength permeable bricks, curb stones, various decoration plates and other various high-strength and high-durability products.

Description

technical field [0001] The invention relates to a new type of building material, in particular to a method for manufacturing building materials through the coupling of metallurgical slag and gypsum materials. Background technique [0002] Granulated blast furnace slag Slag refers to the molten material mainly composed of silicates and aluminosilicates obtained during blast furnace smelting pig iron. After quenching and granulating, it is granulated blast furnace slag. The discharged waste, when the furnace temperature reaches 1400-1600°C, the furnace charge melts, and the gangue in the ore, the ash in the coke, the co-solvent and other impurities that cannot enter the pig iron form a floating waste mainly composed of silicate and aluminate. Slag on molten iron. The main components of blast furnace slag are CaO and SiO 2 、Al 2 o 3 . According to the cooling method, it is divided into air-cooled slag, water-quenched slag and expanded slag. According to the chemical compo...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B28/12
CPCC04B28/00C04B28/12C04B22/146C04B18/142C04B14/068
Inventor 韩涛靳秀芝
Owner 韩涛
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