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

A technology of waste 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

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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 8wt%. 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 450m 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 8.5wt%. 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 9wt%. 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 raw gas-aided material forming method, and a material for steel smelting, and relates to the technical field of metallurgy. The method comprises the step that raw gas is led into a mixer containing materials. The raw gas temperature is 650-850 DEG C, and the water content of the materials is larger than or equal to 8 wt%. The materials are dust sludge, or one or two of iron ore concentrate and coal powder. The raw gas is discharged from the mixer after the raw gas is mixed with the materials. After the raw gas is mixed with the materials, the material temperature is increased, while the raw gas temperature is decreased. The materials per ton can be mixed with the raw gas of which the net gas amount is 450-1600 m<3>. The raw gas is mixed with the materials for heatexchange; on one hand, the raw gas temperature can be reduced, and the ammonia amount and energy consumption are reduced during ammonia refrigeration; the material temperature is increased, and facilitates the subsequent forming of the materials; and on the other hand, tar is precipitated in the cooling process of the raw gas, and the tar as adhesive is used for assisting in subsequent forming ofthe 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): C22B1/24C10K1/04
CPCC10K1/046C22B1/2406
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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