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Method for using raw coal gas to assist material forming and material for iron and steel smelting

A technology of raw gas and materials, applied in the field of metallurgy, can solve problems such as energy waste

Active Publication Date: 2019-11-12
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional technology is mature, it causes a lot of waste of energy

Method used

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  • Method for using raw coal gas to assist material forming and material for iron and steel smelting
  • Method for using raw coal gas to assist material forming and material for iron and steel smelting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a method for using raw coal gas to assist material forming, which mainly includes the following steps:

[0037] The raw coal gas produced by the coke oven is introduced into the mixer containing the materials. The temperature of the raw gas before entering the mixer is 650°C. The water content of the material before mixing with raw coal gas is 0wt%. The main component of the material is iron ore concentrate (with some other impurities inevitably). Raw coal gas is introduced into the mixer through ordinary pipelines (non-insulated pipelines).

[0038] After the raw gas is mixed with the material, the raw gas is discharged from the mixer. The raw gas is mixed with the material to increase the temperature of the material and lower the temperature of the raw gas. The net gas volume that can be produced per 1 ton of material is 250m 3 The barren gas mixture.

[0039] Among them, please refer to figure 1 , figure 1 A schematic diagram of the s...

Embodiment 2

[0042] This embodiment provides a method for using raw coal gas to assist material forming, which mainly includes the following steps:

[0043] The raw coal gas produced by the coke oven is introduced into the mixer containing the materials. The temperature of raw coal gas before entering the mixer is 850°C. The water content of the material before mixing with raw coal gas is 6.5wt%. The main components of the material are iron concentrate, iron and steel plant dust (with some other impurities inevitably). Raw coal gas is introduced into the mixer through the insulation pipe. The thermal insulation pipeline is provided with a gate valve for controlling whether the thermal insulation pipeline is connected to the mixer.

[0044] After the raw gas is mixed with the material, the raw gas is discharged from the mixer. The raw gas is mixed with the material to increase the temperature of the material and lower the temperature of the raw gas. Every 1 ton of material can produce ...

Embodiment 3

[0048] This embodiment provides a method for using raw coal gas to assist material forming, which mainly includes the following steps:

[0049] The raw coal gas produced by the coke oven is introduced into the mixer containing the materials. The temperature of the raw gas before entering the mixer is 700°C. The water content of the material before mixing with raw coal gas is 2wt%. The main component of the material is a mixture of iron concentrate and coal powder (with some other impurities inevitably). Raw coal gas is introduced into the mixer through the insulation pipe. The thermal insulation pipeline is provided with a gate valve for controlling whether the thermal insulation pipeline is connected to the mixer.

[0050] After the raw gas is mixed with the material, the raw gas is discharged from the mixer. The raw gas is mixed with the material to increase the temperature of the material and lower the temperature of the raw gas. The net gas volume that can be produced...

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Abstract

The invention provides a method for aiding material forming through raw coke oven gas and materials for steel smelting, and relates to the technical field of smelting. The method comprises the step that the raw coke oven gas is guided into a mixer containing the materials. The temperature of the raw coke oven gas ranges from 650 DEG C to 850 DEG C, and the water content of the materials is smallerthan 8wt%. The materials are iron and steel plant dust mud or include one or more of iron ore concentrate and pulverized coal. After the raw coke oven gas and the materials are mixed, the raw coke oven gas is exhausted out of the mixer. After the raw coke oven gas and the materials are mixed, the temperature of the materials is raised, and the temperature of the raw coke oven gas is reduced. Oneton of materials can be mixed with the raw coke oven gas with the clean gas amount of 250 m<3> to 1000 m<3>. The raw coke oven gas and the materials are mixed and subjected to heat exchange; on one hand, the temperature of the raw coke oven gas is reduced, and the ammonium hydroxide amount and energy consumption during ammonia cooling are reduced; on the other hand, the temperature of the materialis raised, and subsequent forming of the materials is benefited; and tar is separated out in the cooling process of the raw coke oven gas, and the tar serves as an adhesive to aid subsequent formingof the materials.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for using raw coal gas to assist in forming materials and materials for iron and steel smelting. Background technique [0002] As the main by-product of coking, raw coal gas has complex components and the temperature ranges from 655°C to 800°C. The traditional process adopts the rapid cooling process of circulating ammonia water at 70°C-78°C to quickly cool the raw gas to 80°C-90°C. The high-temperature heat in the raw coal gas is absorbed by the gasified ammonia and water vapor, and becomes low-temperature heat at 80°C-85°C. The low-temperature heat enters the primary cooler with the raw coal gas, and is finally taken away by the circulating water. Although the traditional technology is mature, it causes a lot of waste of energy. [0003] The technology represented by environmental protection and clean direct reduction ironmaking has developed rapidly in recent yea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/245
CPCC22B1/2406C22B1/245
Inventor 刘功国秦洁樊河雲辛彦博
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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