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Sintering raw material and preparation method thereof

A raw material and fuel technology, applied in the field of sintered raw materials and its preparation, can solve the problems of high green ball rate, decreased strength of finished balls, insufficient combustion, etc.

Active Publication Date: 2020-07-03
北京建邦伟业机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the loss on ignition is unreasonable, it will lead to the following problems: 1) Explosive balls will appear in sintering, and the yield will drop; 2) The green ball rate is high, such as the green ball rate is 15%-20%; 3) Agglomeration is easy to occur during the sintering process ; 4) Insufficient combustion, resulting in a decrease in the strength of the finished ball

Method used

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  • Sintering raw material and preparation method thereof
  • Sintering raw material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put the fly ash and shale into the mixer and stir to obtain a homogeneous mixture; measure the loss on ignition of the homogeneous mixture, if the loss on ignition is less than 6.7%, add sludge, bentonite and silica mud to it to adjust the final The loss on ignition is 6.7-7.73%; if the loss on ignition is greater than 7.73%, further add shale, bentonite and petroleum catalyst to adjust the final loss on ignition to 6.7-7.73%. The mixture was granulated, preheated at 500°C for 20 minutes and then sintered at 1100°C to obtain ceramsite. Observe whether there is obvious ball explosion and agglomeration during the sintering process, and measure the green ball rate in the sintered product.

Embodiment 2

[0024] Batching and sintering process of embodiment 2 ultra-light ceramsite

[0025] The fly ash of 75 weight parts, the shale of 7 weight parts are put into agitator and stirred, obtain homogeneous mixture; Measure the loss on ignition and SiO of this homogeneous mixture 2 、Al 2 o 3 , Fe 2 o 3 According to the measurement results, sludge is further added to the mixture to adjust the loss on ignition, and petroleum catalysts and bentonite are added to adjust the SiO2 content. 2 、Al 2 o 3 , Fe 2 o 3 content of metal oxides. Make the loss on ignition of the mixture in the range of 6.7-7.37%; SiO 2 +Al 2 o 3 The weight percentage is in the range of 72.27%-78.2%, Fe 2 o 3 The weight percentage of Ca, Mg, K, Na and other metal oxides is in the range of 17.58-21.35%. After adjusting the ignition loss and chemical composition of the mixture to the above range, the mixture is granulated, preheated at 500°C for 20 minutes, and then sintered at 1100°C to obtain ceramsite. ...

Embodiment 3

[0029] The batching and sintering process of embodiment 3 high-strength ceramsite

[0030] The fly ash of 80 weight parts, the shale of 10 weight parts are put into agitator and stirred, obtain homogeneous mixture; Measure the loss on ignition and SiO of this homogeneous mixture 2 、Al 2 o 3 , Fe 2 o 3 According to the measurement results, sludge is further added to the mixture to adjust the loss on ignition, and a petroleum catalyst is added to adjust the SiO 2 、Al 2 o 3 , Fe 2 o 3 content of metal oxides. Make the loss on ignition of the mixture in the range of 6.7-7.37%; SiO 2 +Al 2 o 3 The weight percentage is in the range of 75.3%-77.92%, Fe 2 o 3 The weight percentage of Ca, Mg, K, Na and other metal oxides should be less than 16.43%. Adjust the ignition loss and chemical composition of the mixture to the above range, then granulate, preheat at 500°C for 20 minutes, and then transfer to 1100°C for sintering to obtain ceramsite. Measure the cylinder compress...

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Abstract

The invention discloses a sintering raw material and a preparation method of the sintering raw material. The preparation method of the sintering raw material comprises the steps: a, mixing fly ash and an adhesive agent to form a primary mixture and detecting an ignition loss of the primary mixture, b, adding fuel and an auxiliary material when the ignition loss of the primary mixture is less than 6% and further adding the adhesive agent and the auxiliary material when the ignition loss of the primary mixture is greater than 8%, and c, adjusting the final ignition loss of the mixture to be 6-8% to obtain the sintering raw material. Ceramsite is obtained by balling and sintering the sintering raw material. The preparation method of the sintering raw material is simple to operate and practical, can avoid ball explosion, agglomeration, a high ball generation rate and the like in a sintering process of the ceramsite particularly under conditions of complicated fly ash sources and unstable components, and can ensure the stable quality of the ceramsite product.

Description

technical field [0001] The invention relates to the field of light aggregate preparation, in particular to a sintered raw material and a preparation method thereof. Background technique [0002] Fly ash is a kind of industrial waste, which mainly comes from the discharge of coal-fired power plants, and is one of the main industrial wastes in my country. According to statistics, my country's annual slag discharge has reached 30 million tons. And as the scale of the power industry continues to expand, the amount of fly ash emissions is still increasing year by year. The fly ash discharged into the air will generate dust and pollute the atmosphere; the fly ash discharged into the water system will block the river and pollute the water quality. Therefore, if the discharge of fly ash is not properly controlled and treated, it will seriously endanger the safety of people's lives and property, and cause irreparable damage to the natural environment. Based on the above reasons, h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/06C04B33/135C04B33/13
CPCC04B33/131C04B33/1315C04B33/1352C04B38/009C04B38/0665C04B38/069C04B2235/3217C04B2235/77C04B2235/96C04B38/0067Y02P40/60
Inventor 赵孟奇赵巍曹文涛谌学祥彭志强赵佳佳
Owner 北京建邦伟业机械制造有限公司
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