Device system for producing sintering-expanded haydite by red mud

A roasting device and ceramsite technology, which is applied in the production of ceramic materials, ceramic products, ceramic molding machines, etc., can solve the problems of inability to swell the ceramsite and insufficient gas generation, and achieve the goal of reducing the adhesion rate, saving resources and saving energy. Effect

Pending Publication Date: 2017-11-17
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still deficiencies in this method. Because the main raw materials are two kinds of red

Method used

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  • Device system for producing sintering-expanded haydite by red mud
  • Device system for producing sintering-expanded haydite by red mud

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0050] Example 1

[0051] 40 parts of sintered red mud, 30 parts of fly ash powder, 15 parts of coal gangue, 10 parts of clay, and 5 parts of blue carbon powder were respectively dried and ball-milled, then passed through a 200-mesh square-hole sieve and formed into balls on a disc. Spray water in the machine to make 8-12mm wet ceramsite pellets, put the ceramsite wet pellets into a drying box for drying, the drying temperature is 105 ℃, and dry for 24 hours. After drying, the ceramsite pellets are placed in Roasting in a muffle furnace, the roasting system is a maximum temperature of 1200 ℃, roasting for 30min. After firing, it is rapidly cooled to below 400°C. The prepared ceramsite meets the requirements of the national standard GB / T1743.1-2010 and can be used as concrete lightweight aggregate.

Example Embodiment

[0052] Example 2

[0053] 60 parts of Bayer red mud, 20 parts of fly ash powder, 10 parts of coal gangue, 5 parts of blue carbon powder, and 5 parts of clay were dried and ball-milled respectively, passed through a 200-mesh square-hole sieve, and placed in a disc pelletizing machine. The ceramsite wet pellets of 10-15mm are made by spraying water in the middle, and the ceramsite wet pellets are placed in a drying box for drying. Roasting in the chain grate machine, the roasting system is the maximum temperature of 1250 ℃, roasting for 15min. After firing, it is rapidly cooled to below 400°C. The prepared ceramsite meets the requirements of the national standard GB / T1743.1-2010 and can be used as concrete lightweight aggregate.

Example Embodiment

[0054] Example 3

[0055] 50 parts of Bayer red mud, 25 parts of fly ash powder, 10 parts of coal gangue, 10 parts of blue carbon powder, and 5 parts of clay were dried and ball-milled respectively, passed through a 200-mesh square-hole sieve, and placed in a disc pelletizing machine. The ceramsite wet pellets of 12-15mm are made by spraying water in the middle, and the ceramsite wet pellets are placed in a drying box for drying. Roasting in a rotary hearth furnace, the roasting system is a maximum temperature of 1150 ° C, roasting for 20 minutes. After firing, it is rapidly cooled to below 400°C. The prepared ceramsite meets the requirements of the national standard GB / T1743.1-2010 and can be used as concrete lightweight aggregate.

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Abstract

The invention provides a device system for producing sintering-expanded haydite by red mud. The device system comprises a material mixing machine, a disk pelletizer, a drying device, a calcination device and a cooling device, wherein the disk pelletizer is connected with the material mixing machine; the drying device is connected with the disk pelletizer; the calcination device is connected with the drying device; the cooling device is connected with the calcination device for carrying out quenching processing on a pellet subjected to calcination to enable the surface of the pellet to be quickly solidified so as to prevent the pellet from being shrunk while the ceramic pellets are prevented from adhering. According to the device system, solid wastes are used as main raw materials, Fe2O3 resources in the red mud are used, Fe2O3 reacts with carbon to serve as gas forming agent to replace a situation that carbonate is traditionally taken as the gas forming agent, and resources are saved; in addition, the carbon can be used as the reducing agent of Fe2O3 in the pellet and also can be used as fuel for supplementing a heat source, and energy consumption is saved. The device system adopts an air cooling technology after materials are subjected to calcination, an adhesion rate between haydites can be lowered, and the finished product rate of a product is improved.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of red mud, and in particular relates to a process method and a device system for producing inflamed ceramsite by using red mud. Background technique [0002] Red mud is a by-product of the alumina industry. The production of 1 ton of alumina will produce 1.1-1.5 tons of red mud. With the rapid development of the alumina industry in recent years, my country's alumina production in 2012 was 42.14 million tons, and the red mud discharge was about 50-60 million tons. Red mud is a kind of bulk waste in our country. There is no effective treatment method yet, and the method of storage is still used for disposal. At present, the total storage capacity has exceeded 200 million tons. The method of land storage will not only occupy a large amount of land, but also due to the strong alkalinity of red mud, once the tailings dam breaks, it will cause great harm to personal and property safety and the ...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B33/132C04B33/30C04B33/32B28B15/00
CPCB28B15/00C04B33/1322C04B33/30C04B33/32C04B38/02Y02P40/60
Inventor 陈士朝边妙莲马冬阳孙辉曹志成吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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