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Method for processing coal char slag, waste active carbon, steel slag and iron tailings by using cement kiln

A technology for co-processing and coal coke slag, which is applied to iron tailings. It is aimed at the co-processing of coal coke slag, waste activated carbon and steel slag in cement kilns. It can solve the problems of environmental groundwater pollution and large footprint of tailings ponds, and achieve saving Coal, the effect of increasing sales efficiency and reducing total emissions

Active Publication Date: 2017-08-11
金圆环保股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tailings pond covers a large area and is a great safety hazard. In addition, the water from the tailings, which is rich in mineral processing agents in the tailings pond, seeps into the ground, causing great pollution to the environment and groundwater.

Method used

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  • Method for processing coal char slag, waste active carbon, steel slag and iron tailings by using cement kiln

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Mix activated carbon and coal coke slag at a ratio of 2:20 to obtain mixture 1; mix iron tailings and steel slag at a ratio of 1:2 to obtain mixture 2; put mixture 1 into a ceramic ball mill and grind for 30 minutes to powder Add 1 kg of cement raw meal powder per minute during the grinding process; pass the ground material through an 80-mesh sieve, and the under-sieve enters the next process, and the over-sieve continues to be ground; pass the sieved under-sieve through the spray The coal pipes are fed into the vertical incinerator. Part of the cement kiln part of the tertiary air is led out by the high temperature resistant air duct with refractory material inside, and the process parameters are: temperature is 1000 °C, air volume is 30000m 3 / h, the oxygen content is 20%. The entrance of the tertiary air pipe is adjacent to the coal injection pipe and is located below the coal injection pipe; in addition, the mixture 2 is introduced into the lower 1 / 8 of the vertica...

Embodiment 2

[0038]Mix activated carbon and coal coke slag at a ratio of 5:15 to obtain mixture 1; mix iron tailings and steel slag at a ratio of 3:3 to obtain mixture 2; put mixture 1 into a ceramic ball mill and grind for 45 minutes to powder Add 2 kg of cement raw meal powder per minute during the grinding process; pass the ground material through an 80-mesh sieve, and the under-sieve enters the next process, and the over-sieve continues to be ground; pass the sieved under-sieve through the spray The coal pipes are fed into the vertical incinerator. Part of the cement kiln part of the tertiary air is led out by the high-temperature resistant air duct with refractory material inside, and the process parameters are: the temperature is 900°C, and the air volume is 50,000m 3 / h, the oxygen content is 20%. The entrance of the tertiary air duct is adjacent to the coal injection pipe and is located below the coal injection pipe; in addition, the mixture 2 is introduced into the lower 1 / 9 of t...

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Abstract

The invention discloses a method for processing coal char slag, waste active carbon, steel slag and iron tailings by using a cement kiln. The method comprises the following steps: mixing, grinding, sieving, burning, kiln feeding with flue gas, pig iron production, tail gas discharge and magnetic separation. The method uses the cement kiln for processing coal char slag, waste active carbon, steel slag and iron tailings, the cement kiln is used for burning the coal char slag having calorific value and waste active carbon, at the same time, the pig iron is generated, problem of city waste accumulation can be solved, waste can be used for treating waste, and the pollutant discharge amount is reduced.

Description

technical field [0001] The invention relates to the technical field of environmental protection regeneration, in particular to a method for co-processing coal slag, waste activated carbon, steel slag and iron tailings in cement kilns. Background technique [0002] As my country's basic energy and important raw material, coal has an important strategic position in national economic and social development, and will be my country's main energy for a long time. Coal gasification technology is the foundation and core of clean coal technology in the future. It is the development of coal chemical products such as ammonia, methanol, dimethyl ether, coal-based liquid fuels, integrated coal gasification combined cycle power generation, polygeneration systems, hydrogen production, fuel cells, etc. The foundation of industry is the common technology, key technology and leading technology of these industries. After coal gasification, coal coke residue will be produced, which was include...

Claims

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Application Information

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IPC IPC(8): C04B7/38C04B7/44C04B7/147C04B7/24C21B11/06
CPCC04B7/147C04B7/24C04B7/38C04B7/44C21B11/06Y02P10/20Y02P40/10
Inventor 李春萍张青锋
Owner 金圆环保股份有限公司
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