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Silicon-manganese water-quenched slag concrete

A technology of silico-manganese water-quenched slag and concrete, which is applied in the field of silico-manganese water-quenched slag, can solve the problems of polluting the environment, unreasonable use of natural resources, and low radioactivity of quartz tailings, achieving good performance and good particle size distribution , high-strength effect

Inactive Publication Date: 2020-08-25
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Quartz tailings is a kind of high-silicon industrial waste. The annual discharge of quartz tailings is more than 10 million tons. A large number of waste accumulation methods are used to solve the problem, which easily makes natural resources unreasonable and pollutes the environment. At the same time, silica sand Resources are scarce, and quartz tailings are low in radioactivity, making building materials can meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The pretreatment process of silicomanganese water-quenching slag includes: first drying the silicomanganese-manganese water-quenching slag, using a ball mill to grind, and sieving to obtain ultra-fine powder with a specific surface area of ​​4900cm 3 / g, the particle size is 1-6μm.

[0039] The grinding process of quartz tailings is as follows: 1. The grinding speed is 700r / min for 40min; 2. The grinding speed is 1500r / min for 20min; 3. The quartz tailings are screened.

[0040] Preparation of activator: make 338kg / m of lime and soda ash in a molar ratio of 2:1 3 stimulant.

[0041] A preparation process of silico-manganese water-quenched slag concrete:

[0042] 1) The fly ash 71.5kg / m 3 , silicon manganese water quenching slag 143.55kg / m 3 , Cement 334.95kg / m 3 (i.e. gelling material 550kg / m) and activator 338kg / m 3 Mix and stir for 60s;

[0043]2) Continuously graded stone 951kg / m 3 , medium sand 620kg / m 3 , Quartz tailings 128.3kg / m 3 Add to the gelled mate...

Embodiment 2

[0047] The pretreatment process of silicomanganese water-quenching slag includes: first drying the silicomanganese-manganese water-quenching slag, grinding it with a ball mill, and sieving to obtain ultra-fine powder with a specific surface area of ​​5000cm 3 / g, the particle size is 1-8μm.

[0048] The grinding process of quartz tailings is as follows: 1. The grinding speed is 800r / min for 40min; 2. The grinding speed is 1400r / min for 20min; 3. The quartz tailings are screened.

[0049] Preparation of activator: Lime and soda ash are prepared at a molar ratio of 2:1 to make 339.4kg / m 3 stimulant.

[0050] A preparation process of silico-manganese water-quenched slag concrete:

[0051] 1) The fly ash 81.2kg / m 3 , silicon manganese water quenching slag 159.62kg / m 3 , Cement 339.18kg / m 3 (ie cementitious material 580kg / m) and 339.4kg / m 3 The activator was mixed and stirred for 60s;

[0052] 2) Continuously graded stone 1021kg / m 3 , medium sand 630kg / m 3 , Quartz tailing...

Embodiment 3

[0056] The pretreatment process of silicomanganese water-quenching slag includes: first drying the silicomanganese-manganese water-quenching slag, grinding it with a ball mill, and sieving to obtain ultra-fine powder with a specific surface area of ​​4800cm 3 / g, the particle size is 1-6μm.

[0057] The grinding process of quartz tailings is as follows: 1. The grinding speed is 900r / min for 50min; 2. The grinding speed is 1400r / min for 20min; 3. The quartz tailings are screened.

[0058] Preparation of activator: Lime and soda ash are prepared at a molar ratio of 2:1 to 337.5kg / m 3 stimulant.

[0059] A preparation process of silico-manganese water-quenched slag concrete:

[0060] 1) Fly ash 70.8kg / m 3 , silicon manganese water quenching slag 169.59kg / m 3 , Cement 319.23kg / m 3 (ie cementitious material 590kg / m) and 337.5kg / m 3 The activator was mixed and stirred for 60s;

[0061] 2) Continuously graded stone 1001kg / m 3 , medium sand 670kg / m 3 , Quartz tailings 127.3kg...

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Abstract

Physical treatment and chemical modification are carried out on silicon-manganese water-quenched slag, an excitant, quartz tailings, sand, stone and other components are comprehensively utilized, andthe advantages are complementary. According to the invention, the silicon-manganese water-quenched slag contains high vitreous body, potential hydraulic property and volcanic ash activity, and the activity is excited by an exciting agent which is formed by mixing lime and sodium carbonate, so that active substances are generated in the secondary reaction of cement, and the strength of the materialis improved. The silicon-manganese water-quenched slag partially replaces cement, cement consumption is reduced, the gelling effect of the slag is used to solidify heavy metal, the slag is environmentally friendly, gaps among particles are filled, and the compactness is high. The silica content of the quartz tailings is high, the hydration reaction of silicate is promoted, secondary utilization of natural resources is achieved, the radioactivity of part of substitute sand is low, and the manufacturing cost is reduced. Compared with reference concrete, the prepared concrete has the advantagesthat the mechanical property is improved to a certain extent, and the concrete has good impermeability, freezing resistance, dry shrinkage resistance, durability and the like and can be widely appliedto engineering.

Description

technical field [0001] The invention belongs to the technical field of building material concrete preparation in civil engineering, and in particular relates to a silicomanganese water quenching slag. Background technique [0002] As a large-yield and widely used alloy, silicon-manganese alloy will produce 1.2-1.3 times silicon-manganese slag when producing 1 ton of silicon-manganese alloy. Silico-manganese slag contains a lot of CaO, Al 2 o 3 , SiO 2 , MnO 2 And other substances, its structure is loose and porous, and contains many irregular amorphous crystals. Tests have found that silicomanganese slag contains high content of chromium, zinc, boron, etc., and also contains elements such as cadmium and lead. Pile it on the ground, which is prone to enrichment and exceeds the national standard. The heavy metals contained in this industrial by-product are not only It pollutes the land and the environment, and is even more harmful to human health. Due to the excessive pr...

Claims

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Application Information

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IPC IPC(8): C04B28/08
CPCC04B28/085C04B7/00C04B18/08C04B22/062C04B22/10C04B14/06C04B14/02C04B18/12C04B22/002C04B2103/302
Inventor 罗百福冯勤勤李诚张伟王东
Owner XIANGTAN UNIV
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