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Method for producing coke

A technology of coke and charging, used in coke ovens, petroleum industry, charging devices, etc.

Active Publication Date: 2014-05-21
TATA STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the effect of the heating rate during the soaking period on coke quality has not been explored

Method used

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  • Method for producing coke
  • Method for producing coke
  • Method for producing coke

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Embodiment Construction

[0014] As has been studied by many, the coke strength after reaction (CSR) of any metallurgical coke depends primarily on the caking properties of the coal or coal blend and the heating rate it is subjected to, among other factors. This fact has been reported by Nakamura et al. (1970). They actually quantified the effect of blend coal properties (70%) compared to operating parameters (30%) such as bulk density, crushing fineness, soaking time, preheating, etc. on the coke quality (CSR) produced. The present invention focuses on the soaking aspect of the carbonization of coal. It has been widely recognized that the soaking time is very important for the production of high-quality coke. Soaking thermally recombines coke molecules to form coke with good microstructure (high cell wall thickness and low pore size).

[0015] The invention proposes that there is an improvement in the thermal recombination of the coke molecules if the heat input is reduced or completely stopped duri...

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Abstract

The invention relates to a method for producing coke. The method comprises the steps of: preparing coal charge; at a flue temperature of 1000-1400 DEG C, carbonizing the coal charge in a furnace in a total period duration period; equalizing temperature of the carbonized coal; and stopping heat input into the furnace after a preset time period.

Description

technical field [0001] The present invention relates to the improvement of the CSR of coke produced in recovery type horizontal coke ovens by zero heating technique during soaking. The invention also provides a reduction in energy consumption in the coke oven and a corresponding reduction in emissions to the air. Background technique [0002] Blast furnace coke controls the gas permeability of the load and provides it with the necessary physical support. Therefore, from the blast furnace operator's point of view, coke quality is of paramount importance. Reacted coke strength (CSR) is an accepted coke quality parameter among parameters for measuring blast furnace performance. Coke producers all over the world have been researching technologies to improve the CSR of coke. Nakamura et al. (1977) reported that blended coal properties played a major role (70%) in controlling the CSR of the resulting coke produced compared to carbonization conditions. Therefore, a lot of work ...

Claims

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Application Information

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IPC IPC(8): C10B57/00C10B31/00
Inventor A·R·博德沃B·达斯P·K·哈尔达S·K·哈尔达
Owner TATA STEEL
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