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A method and device for preparing active micropowder by air quenching steel slag and fly ash

A technology of steel slag and auxiliary equipment, applied in chemical instruments and methods, climate sustainability, sustainable waste treatment, etc., can solve the problems of uneven particle size, difficult to effectively crush steel slag, poor actual effect, etc., and achieve high activity, The effect of good uniformity and high hourly flexural strength

Active Publication Date: 2021-12-28
国宏联绿(北京)科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although steel slag is waste at present, due to its good structural strength, it is more common to be used as a material for occasions that require strength. 80-3000 mesh particles of various sizes, and due to the extremely high hardness of steel slag, if such a wide distribution size is directly ground, the actual effect is very poor, and the steel slag is difficult to be effectively crushed

Method used

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  • A method and device for preparing active micropowder by air quenching steel slag and fly ash
  • A method and device for preparing active micropowder by air quenching steel slag and fly ash
  • A method and device for preparing active micropowder by air quenching steel slag and fly ash

Examples

Experimental program
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Effect test

Embodiment 1

[0042] see Figure 1-7 , the present invention provides a technical solution: a steel slag crushing auxiliary device, which is characterized in that it includes a vibrating screen group 1, a support frame 2, a first vibrator 3, a side frame 4, an ultrasonic clamping frame 5, a funnel portion 6, Grinder Hopper7. The vibrating screen group 1 has a top cover 11 , a first vibrating screen 12 , a second vibrating screen 13 , a third vibrating screen 14 , a fourth vibrating screen 15 , and a bottom tank 16 sequentially from top to bottom.

[0043] Among the first vibrating screen 12, the second vibrating screen 13, the third vibrating screen 14, and the fourth vibrating screen 15, the first screen cloth 123 of 120-240 purpose, the second screen cloth 133 of 600-800 purpose, The third mesh 143 of 1200-1500 mesh, the fourth mesh 153 of 2200-3800 mesh, the above four meshes are all in a horizontal state.

[0044] The outer side of the top cover 11 has a downward flange, and is fasten...

Embodiment 2

[0063] A method for preparing active micropowder containing steel slag and fly ash by wind-quenching method is carried out by using the device of the aforementioned embodiment 1, and specifically includes the following steps.

[0064] (1) Weighing raw materials: Weigh 60-70% steel slag, 20-30% fly ash, 0.7-2% steel slag grinding aid, 16-20% lime, 0.1-0.3% Polycarboxylate superplasticizer powder, 0.2-0.6% activator, 0.1-0.3% silicon oxide, and 0.1-0.3% reinforcing fiber.

[0065] (2) Classification and screening: use the steel slag crushing auxiliary device as claimed in claim 3, pour the steel slag, steel slag grinding aid and fly ash taken in step 1 on the first vibrating screen 12, buckle the top cover, Align the first vibrating screen 12, the second vibrating screen 13, the third vibrating screen 14, the fourth vibrating screen 15, and the bottom groove 16 in the vertical direction, and use the vibrating top bolt 35 and the upper frame 23 of the vibrating screen group 1 up ...

Embodiment 3

[0071] Same as the implementation of Example 2, the difference is: (1) raw materials are taken by weighing: take by weight respectively 62% steel slag, 20.8% fly ash, 0.7% steel slag grinding aid, 16% lime, 0.1% polycarboxylate superplasticizer powder, 0.2% activator, 0.1% silicon oxide, and 0.1% reinforcing fiber.

[0072] (2) Hierarchical screening: Vibrate for at least 1.5 hours by alternating low and high frequencies.

[0073] (3) Multiple grinding steps: the second generator vibrates for five times, the second generator 51 is turned on to vibrate at 15000-16000 Hz for 10 minutes, and the grinder is turned on to grind for at least 1.5 hours to obtain the product of step 3.

[0074] (4) Ultra-fine grinding step: in a gravity-free mixing mixer, stir for 30 minutes to obtain the active micropowder composite material.

[0075] Preferably, the repeated alternation of low and high frequencies refers to repeated alternation of 8000-9000 Hz vibration for 20 s and 24000-26000 Hz v...

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Abstract

An active micropowder and method prepared by wind-quenching steel slag and direct discharge fly ash, raw materials include 60-70% steel slag, 20-30% fly ash, 16-20% lime mixture, 0.1-70% Add 0.3% polycarboxylate superplasticizer powder into a gravity-free mixing mixer, and stir to make the materials fully mixed evenly. Through the wind quenching method, the amorphous mineral phase on the surface of steel slag is significantly increased, and the potential activity is improved. Through grinding aids, reinforcing fibers, polycarboxylate superplasticizer powder and silicon oxide, the activity is higher, and the compatibility with cement is good. Fly ash delays the hydration rate, reduces the temperature rise of concrete caused by hydration heat, prevents concrete from generating temperature cracks, and significantly improves the bonding force of concrete, thereby improving durability. Because of the problem that the different sizes of steel slag affect the grinding effect, an auxiliary device for screening is specially made for the crushing of steel slag.

Description

technical field [0001] The invention relates to the technical field of civil engineering materials, in particular to a method and a device for preparing steel slag and direct discharge fly ash by wind-quenching method. Background technique [0002] As we all know, steel slag is a by-product of the steelmaking process, which is formed by the oxidation of silicon, manganese, phosphorus, sulfur and other impurities in pig iron during the smelting process and the salts formed by the reaction of these oxides with solvents Composition, steel slag is clinker, heavy melting phase, low melting temperature, early liquid phase formation and good fluidity when remelting, steel slag is used as a secondary resource comprehensively. There are two main ways, one is as a smelting solvent in this Plant recycling, not only can replace limestone, but also can recover a large amount of metal iron and other useful elements; the other is used as raw materials for making road construction materials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B07B1/28B07B1/42B07B1/46B02C23/16C04B24/24C04B18/14C04B18/08
CPCB07B1/28B07B1/42B07B1/46B02C23/16B07B1/4609C04B40/0046C04B18/142C04B18/08B07B2201/04C04B2103/0068C04B22/064C04B24/24C04B14/06C04B20/0048Y02W30/91
Inventor 张岩刘波梁超董伟付吉国张斌邓少奎赵鹏林红苗燕张子琛李通
Owner 国宏联绿(北京)科技发展有限公司
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