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Preparation method of active micropowder containing rotating-drum method slag and directly discharged coal ash

A steel slag and vibrating screen technology, applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve problems such as air pollution, biological hazards, and the difficulty of effectively crushing steel slag

Active Publication Date: 2020-07-28
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

If a large amount of fly ash is not controlled or treated, it will cause air pollution, and if it enters the water, it will silt up the river, and some of the chemical substances will cause harm to organisms and humans.
[0004] 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 the steel slag, if the steel slag with 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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  • Preparation method of active micropowder containing rotating-drum method slag and directly discharged coal ash
  • Preparation method of active micropowder containing rotating-drum method slag and directly discharged coal ash
  • Preparation method of active micropowder containing rotating-drum method slag and directly discharged coal ash

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 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.

[0047] 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.

[0048] The outer side of the top cover 11 has a downward flange, and is fasten...

Embodiment 2

[0067] A preparation method of active micropowder containing roller method steel slag and direct discharge fly ash specifically comprises the following steps: 1) raw material weighing: steel slag adopts the slag obtained by the blast furnace ironmaking production process of metallurgical and chemical industry iron-containing waste slag, and its free The content of calcium oxide is lower than 4% by mass, and the moisture content is 12%-16% by mass; the steel slag is crushed, screened and magnetically separated by the roller method, and most of the iron in the steel slag is removed to obtain the steel slag tail powder .

[0068] (2) Grading and screening: use the steel slag crushing auxiliary device as before, pour all the steel slag tail powder obtained in step 1 on the first vibrating screen 12, fasten the top cover, and the first vibrating screen 12, the second vibrating screen The sieve 13, the third vibrating screen 14, the fourth vibrating screen 15, and the bottom groove ...

Embodiment 3

[0076] The implementation is the same as in Example 2, the difference is: (1) Weighing of raw materials: the content of free calcium oxide is less than 3% by mass, and the moisture content is 12%-14% by mass. (2) Vibrate at least 1.5 hours in a low-frequency and high-frequency alternating manner. (3) The second generator vibrates for five times. Turn on the second generator 51 to vibrate at 15000-16000 Hz for 10 minutes, and turn on the grinder to grind for at least 1.5 hours to obtain the product of step 3.

[0077] (4) ultra-fine grinding step: pour the gypsum of the step three product of 20-30 weight part and 30-45 weight part fly ash fine powder, 10-15 weight part coal gangue fine powder, 1-5 weight part In a gravity mixing mixer, stir for 10 minutes; then add 0.1-0.2 parts by weight of magnesium stearate or calcium stearate and one of stearic acid monoglyceride or methyl stearate, stir for 10 minutes, and then add 0.02-1 One of the parts by weight of liquid paraffin or m...

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Abstract

The invention relates to active micropowder prepared from rotating-drum method slag and directly discharged coal ash and a method. Raw materials comprise slag, coal ash, coal gangue and industrial waste gypsum. The slag which is liquid state slag is poured into a slag pot and the slag pot is hoisted to a roller device. The liquid state slag is cooled, cured and crushed and steel and slag are separated in the roller. The slag screened by the device is fed into a grinder to be ground and combined in batches. The industrial waste gypsum is dihydrate gypsum, fluorgypsum or ardealite. Cement is replaced by high quality coal ash in equal mass, so that the desiccated bulk density and the heat conducting coefficient of concrete are reduced, and the strength is improved in a same condition. The slag powder and the coal ash replace the cement, so that a good effect can be obtained. Meanwhile, coal gangue powder and gypsum powder are added to further enhance the strength of the concrete. As the grinding effect is affected by different sizes of the slag, an auxiliary device for screening is further specially manufactured for crushing the slag.

Description

technical field [0001] The invention relates to the technical field of civil engineering materials, in particular to a method for preparing active micropowder containing steel slag from a roller method and direct-discharge fly ash. Background technique [0002] Steel slag is a bulk industrial waste slag discharged from steelmaking converters or electric furnaces. The discharge amount is about 15% of the steel output, and generally contains about 10% of scrap steel and more than 15% of iron oxide components, and is rich in Ca and Mg. The basic oxide compound mineral clinker of the composition, and most of them are in the solid solution compound state of slag-coated iron and iron-coated slag, which is difficult to break and grind. It is labor-intensive and labor-intensive to achieve crushing, separation and purification for reuse. strenuous. Therefore, most of the low-grade iron-containing steel slags are not effectively recycled, and the recyclable ferrite resources are seri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C21/00B02C23/14B02C23/16B07B1/28B07B1/42B07B1/46B03C1/30
CPCB02C21/00B02C23/14B02C23/16B07B1/28B07B1/42B07B1/46B03C1/30B02C2023/165B07B2201/04
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