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Coal gangue activation process adopting synergism of pre-decomposition kiln

A technology for pre-decomposing kiln and coal gangue, which is applied in cement production and other directions, can solve the problems of uncontrollable coal gangue combustion temperature, complicated furnace body and auxiliary building construction, affecting the activity of coal gangue materials, etc. Excellent performance and significant economic benefits

Active Publication Date: 2014-04-30
LUOYANG CEMENT ENG DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The patent document with the application number 200820209744.4 discloses a coal gangue activated kiln, which is bulky, the furnace body and ancillary buildings are complicated to construct, and the cost is high. The smoke and dust pollution generated when the coal gangue is burned is serious, and the combustion temperature of the coal gangue is uncontrollable, which affects the coal gangue. Gangue material activity

Method used

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  • Coal gangue activation process adopting synergism of pre-decomposition kiln

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Experimental program
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Effect test

Embodiment 1

[0031] After the black coal gangue is crushed in the crushing system 1, it is fed into the raw material mill 2 for grinding, and after the material gas is separated by the cyclone separator 3, it enters the black coal gangue powder warehouse 6 for storage, and the black coal gangue powder is fed into the activation furnace 8 for further processing. Calcination activation, black coal gangue powder is activated to become activated coal gangue powder, enters the high-efficiency separator 10 for material gas separation, and the separated hot flue gas is used for waste heat power generation, activated coal gangue powder is in the material cooling and air preheating system 9 After cooling, the finished product is transported to the finished product warehouse 15 for storage.

Embodiment 2

[0033] The black coal gangue is crushed into tiny particles in the crushing system 1, and fed into the raw material mill 2, where it is ground into black coal gangue fine powder with a fineness of 0.08mm square hole sieve and no more than 8% , the finely ground black coal gangue powder is mixed with the airflow from the waste heat boiler 12 and enters the cyclone separator 3 through the outlet of the raw material mill 2, and the separated flue gas enters the dust collection system 13 for treatment and is discharged. The separated black coal gangue powder Through the conveying device 4 and the elevator 5, it is fed into the black coal gangue powder storehouse 6 for storage.

Embodiment 3

[0035] After the black coal gangue powder in the black coal gangue powder storage 6 is measured by the metering device, it is continuously fed into the activation furnace 8 by the conveying device 4 and the hoist 5; Kiln exhaust gas at -1200°C enters the activation furnace 8; the air enters the material cooling and air preheating system 9 and is preheated to 450-550°C before entering the activation furnace 8; in the activation furnace 8, the black coal gangue powder is mixed with the Bottom-up 1050-1200 ℃ kiln exhaust gas and 450-550 ℃ high-temperature hot gas conduct heat exchange, so that the black coal gangue powder is heated rapidly, and the temperature of the black coal gangue powder is controlled by adjusting the air volume and feeding volume. At 850°C, black coal gangue powder rapidly decomposes, decarburizes and dehydrates to form amorphous Al 2 o 3 , SiO 2 , At the same time, a series of physical and chemical processes are activated, and the black coal gangue powder...

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Abstract

The invention discloses a coal gangue activation process adopting synergism of a pre-decomposition kiln. The coal gangue activation process is performed by use of a crushing system, a raw material grinder, a cyclone separator, a conveying device, a lifter, a black coal gangue powder storehouse, a rotary kiln, an activating furnace, a material cooling and air preheating system, a high-efficiency separator, a preheater, an afterheat boiler, a dust collection system, a pneumatic transmission pump and a finished product storehouse. The performances of the coal gangue are activated by utilizing the synergism of a large Portland cement clinker production line in China at present; by optimizing and controlling various technological parameters in the activation, the activity of the black coal gangue is farthest improved; therefore a high-quality mixed material is provided for production of cement and concrete, and the combustion heat of the black coal gangue is also fully utilized to increase the electric energy production of the clinkers, thereby really making the best use of everything.

Description

[0001] technical field [0002] The invention relates to the technical field of coal gangue activation, in particular to a coal gangue activation process coordinated by a precalciner kiln. [0003] Background technique [0004] Coal is the most important energy in our country, and its resources are very rich. In 2008, the output has exceeded 2.716 billion tons. Coal gangue is a kind of solid waste produced in the process of coal mining. With the continuous expansion of coal production, the amount of coal gangue The amount of coal gangue is increasing day by day. The amount of coal gangue produced is calculated as 15% of the raw coal output. The annual increase of coal gangue is at least 180 million tons. . A large amount of coal gangue has seriously polluted the environment, occupied a large amount of land and farmland, and destroyed land resources. If it is not used effectively, it will seriously affect the normal development of my country's coal industry and affect the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/38
CPCY02P40/10
Inventor 赵迎朝王群红陈辉张虎堂
Owner LUOYANG CEMENT ENG DESIGN & RES INST
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