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Modified steel slag cement

A steel slag and modification technology, applied in cement production, etc., can solve problems such as poor stability, poor mechanical strength, and low strength, and achieve the effects of improving mechanical strength, reducing porosity, and reducing pore channels

Active Publication Date: 2018-04-20
湖州昂狮环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is to provide a modified steel slag cement for the disadvantages of low early strength, poor mechanical strength and poor stability of traditional steel slag cement

Method used

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  • Modified steel slag cement

Examples

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Effect test

example 1

[0023] Put bagasse in a steam explosion tank, under the conditions of temperature 220°C and pressure 1.0MPa, hold the pressure for 45s, release the pressure and discharge to obtain steam explosion bagasse; Bagasse, 2 parts of biogas slurry and 30 parts of water were placed in a fermenter, stirred and mixed for 30 minutes at a rotating speed of 200 r / min, fermented for 3 days to obtain a fermented liquid, and filtered the fermented liquid to obtain a filter cake, which was filtered The cake was dried in a vacuum freeze-drying oven until the water content was 10% to obtain pretreated bagasse; the pretreated bagasse was placed in a fluidized bed reactor, and the loaded Nitrogen gas with trimethylaluminum is fed continuously for 30 minutes to obtain modified bagasse; the steel slag is pulverized in a ball mill, and then passed through an 80-mesh sieve to obtain steel slag powder; the obtained steel slag powder is mixed with 10% sulfuric acid Put it in a beaker with a mass ratio of...

example 2

[0025]Put bagasse in a steam explosion tank, under the conditions of temperature 220°C and pressure 1.0MPa, hold the pressure for 45s, release the pressure and discharge to obtain steam explosion bagasse; Bagasse, 2 parts of biogas slurry and 30 parts of water were placed in a fermenter, stirred and mixed for 30 minutes at a rotating speed of 200 r / min, fermented for 3 days to obtain a fermented liquid, and filtered the fermented liquid to obtain a filter cake, which was filtered The cake was dried in a vacuum freeze-drying oven until the water content was 10% to obtain pretreated bagasse; the pretreated bagasse was placed in a fluidized bed reactor, and the loaded Nitrogen gas with trimethylaluminum is fed continuously for 30 minutes to obtain modified bagasse; the steel slag is pulverized in a ball mill, and then passed through an 80-mesh sieve to obtain steel slag powder; the obtained steel slag powder is mixed with 10% sulfuric acid Put it in a beaker with a mass ratio of ...

example 3

[0027] Put the steel slag into a ball mill to pulverize it, and then pass it through a 80-mesh sieve to obtain steel slag powder; put the obtained steel slag powder and sulfuric acid with a mass fraction of 10% in a beaker at a mass ratio of 1:30, and at a speed of 400r / min, Stir the reaction to obtain a reaction mixture, put the reaction mixture in a refrigerator, and freeze it at -20°C for 2 hours to obtain a frozen block, then thaw the frozen block in hot water at 80°C, and freeze in this way, The thawing cycle is 8 times to obtain the thawed mixed solution, and then the thawed mixed solution is filtered to obtain the filter residue, and then the filter residue is placed in an oven and dried for 2 hours to obtain the pretreated steel slag powder; 1:20 placed in a mixing ball mill, under the condition of rotating speed of 400r / min, the ball mill was stirred and mixed for 30min, then placed in a muffle furnace, and calcined for 40min at a temperature of 800°C to obtain calcine...

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Abstract

The invention discloses modified steel slag cement, and belongs to the technical field of building materials. A preparation method of the modified steel slag cement comprises the following steps: pulverizing and sieving steel slag to obtain steel slag powder; stirring the steel slag powder and sulfuric acid for reacting, performing cyclic freezing and unfreezing, and performing filtering and drying to obtain pretreated steel slag powder; performing ball milling, stirring and mixing on potassium permanganate and the pretreated steel slag powder, and performing high-temperature calcination to obtain calcined steel slag powder; performing ball milling, stirring and mixing on calcium carbonate, aluminum powder and the calcined steel slag powder, and performing combustion reaction to obtain modified steel slag powder; and adding cement, the modified steel slag powder, modified bagasse, a silane coupling agent and water to a mixer, and performing stirring and mixing to obtain the modified steel slag cement. The modified steel slag cement provided by the invention has excellent early strength, mechanical strength and stability.

Description

technical field [0001] The invention discloses a modified steel slag cement, which belongs to the technical field of building materials. Background technique [0002] Steel slag is one of the main waste slags in the iron and steel industry. It is a solid waste generated in large quantities when lime is used to extract impurities in the steelmaking process. The discharge of steel slag accounts for about 10% to 15% of steel production. The storage of a large amount of steel slag not only occupies land, but also pollutes the environment. Therefore, the effective treatment and comprehensive utilization of steel slag has always been a concern of people. At present, the main ways to use steel slag are: for wastewater treatment; as sinter raw materials and smelting flux; as road slag and backfill engineering materials; as a substitute for stone chips Production of concrete pavement bricks, concrete hollow blocks; production of steel slag cement and admixtures for concrete, etc. U...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/147C04B7/24C04B7/38
CPCC04B7/147C04B7/24C04B7/38Y02P40/10
Inventor 冯云菊殷小祥陈龙
Owner 湖州昂狮环保有限公司
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