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Method for producing margin coal gas by using steel in rotary cement kiln predecomposition furnace

A technology of cement rotary kiln and precalciner, applied in cement production, rotary drum furnace, clinker production, etc., to achieve the effect of reducing gas emissions, reducing environmental pollution problems, and improving energy utilization

Inactive Publication Date: 2010-09-15
LAIWU IRON & STEEL GRP
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Problems solved by technology

[0004] Aiming at the defects of the prior art, the present invention provides a method for utilizing surplus gas in iron and steel production in cement rotary kiln precalcining furnace, so as to solve the problem of utilization of surplus gas and reduce pollution to the environment, so as to achieve the purpose of energy saving and emission reduction

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  • Method for producing margin coal gas by using steel in rotary cement kiln predecomposition furnace
  • Method for producing margin coal gas by using steel in rotary cement kiln predecomposition furnace

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Embodiment 1

[0018] A method for utilizing surplus gas in iron and steel production in cement rotary kiln precalciner, the process flow is as follows figure 1 As shown, it includes the pressure stabilization and transportation process of the gas, and the combustion and heating process of the gas in the calciner. It is characterized in that it mainly includes the following steps:

[0019] A. The gas with large pressure fluctuations in the steel production process is transported to the gas stabilizing cabinet through the gas pipeline. After the gas stabilizes the pressure in the stabilizing cabinet, the gas is sent into the burner by adjusting the gas flow control valve, and the gas is burned. After spraying into the pre-combustion chamber for pre-combustion, it enters the combustion chamber and forms a high-temperature flame in the combustion chamber to pre-decompose the cement raw meal;

[0020] B. Cement raw meal enters the tertiary air pipe through the fourth-stage feeding pipe, and is b...

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Abstract

Provided is a method of using surplus gas of iron and steel production to produce cement in a predecomposition furnace of a rotary kiln, belonging to the technical field of calcining cement clinker and including a process of voltage stabilization and transformation of coal gas, a process of burnt and heat calcinations of the coal gas in the predecomposition furnace. The coal gas is burnt sufficiently and used in the predecomposition process of the cement raw meal. The coke-oven gas, blast furnace gas, converter gas and high coke mixed gas left in the process of metallurgy production can take place coal powder as fuel to decompose carbonate in the cement raw meal. The invention has the advantages that the manufacture technique can reduce environmental pollution caused by burning coal, increase the utilization ratio of the surplus gas in iron and steel companies, and reduce the exhaust of coal gas, thereby having good economic benefit and social benefit.

Description

technical field [0001] The invention relates to a method for utilizing surplus gas in iron and steel production in a cement rotary kiln precalciner, and belongs to the technical field of cement clinker calcination production. Background technique [0002] At present, most of the cement clinker production in my country adopts the new dry method rotary kiln production technology. The cement rotary kiln system is composed of four parts: suspension preheater, calciner, rotary kiln and cooler. The characteristic of the precalcining kiln is that a calciner is added between the suspension preheater and the rotary kiln of the suspension preheating kiln, and the carbonate in the clinker calcination process is decomposed by using the heat of pulverized coal injected in the calciner. The process is almost complete. At present, domestic new-type dry-process cement production lines all adopt pulverized coal injection combustion in the calciner to supply the heat required for carbonate d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/43F27D23/00F27D3/00F27B7/20F27D99/00
CPCY02P40/121
Inventor 孙庆亮刘智伟吕新锋孙进闫志华孙业新
Owner LAIWU IRON & STEEL GRP
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