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Low-carbon sintering system and process method

A sintering machine system and carbon sintering technology, applied in the field of low-carbon green sintering, can solve the problems of large coke/powdered coal consumption and high pollutant discharge, and achieve the reduction of pollutant content, reduction of sintering carbon content, low Effect of carbon/ultra-low carbon sintering

Active Publication Date: 2021-11-16
CENT IRON & STEEL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above analysis, the present invention proposes a low-carbon sintering system and process method, the purpose of which is to use the regenerative hot blast stove to provide high-temperature air for the sintering machine, and the high-temperature The sensible heat of the air replaces the heat released by the combustion of carbon-containing fuel in the sintering raw materials, and oxygen is introduced into the high-temperature air to realize oxygen-enriched sintering, which solves the current technology of large coke / powdered coal consumption and high pollutant emissions in the existing sintering process problem

Method used

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Effect test

Embodiment 1

[0121] This embodiment provides a low-carbon sintering process, which is sintered by the above-mentioned method, and the process flow chart is as follows figure 1 shown. The details are as follows:

[0122] This embodiment is a 360m 2 Sintering machine 2, the raw material is iron ore powder mixture. Under traditional conditions, that is, the batching parameters under the condition of no hot air are shown in Table 1. The air volume required for traditional sintering is 25.5 million Nm 3 / h.

[0123] Table 1 Sintering ingredient parameter list under traditional conditions

[0124]

[0125] First, the air at normal temperature becomes 1000°C high-temperature air after passing through the hot blast stove 1; then the high-temperature air first passes through the hot blast main pipe 4, and then passes the high-temperature air into the high-temperature hot air cover 5 through six hot air branch pipes 8 connected to the hot blast main pipe, and then The high-temperature hot ai...

Embodiment 2

[0135] This embodiment provides a low-carbon sintering process, which is sintered by the above-mentioned method, and the process flow chart is as follows figure 2 shown. The details are as follows:

[0136] This embodiment is a 360m 2 Sintering machine 2, the raw material is iron ore powder mixture. Under traditional conditions, that is, the batching parameters under the condition of no hot air are shown in Table 3. The air volume required for traditional sintering is 25.1 million Nm 3 / h.

[0137] Table 3 Sintering batching parameter list under traditional conditions

[0138]

[0139] First, the air at normal temperature becomes 800°C high-temperature air after passing through the hot blast stove 1; then the high-temperature air first passes through the hot blast main pipe 4, and then passes the high-temperature air into the high-temperature hot air cover 5 through six hot-air branch pipes 8 connected to the hot-blast main pipe, and then The high-temperature hot air ...

Embodiment 3

[0148] This embodiment provides a low-carbon sintering process, which is sintered by the above-mentioned method, and the process flow chart is as follows figure 2 shown. The details are as follows:

[0149] This embodiment is a 360m 2 Sintering machine, the raw material is iron ore powder mixture. Under traditional conditions, that is, the batching parameters under the condition of no hot air are shown in Table 5. The air volume required for traditional sintering is 25.5 million Nm 3 / h.

[0150] Table 5 Sintering batching parameter table under traditional conditions

[0151]

[0152] Firstly, the air at normal temperature turns into high-temperature air at 1150°C after passing through the hot blast stove; then the high-temperature air passes through the hot-air main pipe first, and then passes the high-temperature air into the high-temperature hot-air hood through 6 hot-air branch pipes connected to the hot-air main pipe, and then the high-temperature hot air is sent ...

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Abstract

The invention relates to a low-carbon sintering system and a process method, belongs to the field of low-carbon metallurgy in metallurgical industry, and solves the problems of high energy consumption, large carbon emission, more pollutants and the like of a sintering process in the prior art. According to the method, a hot blast stove is adopted to provide high-temperature hot air, and then the high-temperature hot air replaces most of carbon in sintering ingredients to enter the material surface of a sintering machine; heat in the hot air and heat generated by combustion of the carbon in the ingredients are used for providing heat for the sintering process, and then low-carbon sintering is achieved; and meanwhile, the flue gas treatment capacity and treatment cost of subsequent sintering can be greatly reduced. The sintering carbon content is reduced, and the method has the advantages of low energy consumption, few pollutants, environmental protection and the like, and accords with energy-saving and green metallurgy advocated by the country.

Description

technical field [0001] The invention relates to the field of low-carbon green sintering in the sintering process of the metallurgical industry, in particular to a low-carbon sintering system and a process method. Background technique [0002] Sintering is to mix various powdery iron-containing raw materials with an appropriate amount of fuel and flux, and add an appropriate amount of water. After mixing and pelletizing, the materials undergo a series of physical and chemical changes on the sintering equipment, and the ore powder particles are bonded into blocks. the process of. The amount of fuel (coke powder and coal powder) in the general sintering raw materials is 4%, and a large amount of SO is produced during the sintering process 2 , NO x Pollutants such as carbon dioxide and other pollutants belong to the process with the largest pollutant emissions in the long iron and steel process, and the main source of these pollutants is fuel. Therefore, reducing the amount of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/22
CPCC22B1/22Y02P10/143
Inventor 王锋高建军齐渊洪严定鎏
Owner CENT IRON & STEEL RES INST
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