Joint production process of crude fuel hot charging and total heat oxygen blast furnace and vertical furnace

A technology of combined production and raw materials, applied in blast furnaces, shaft furnaces, blast furnace details, etc., can solve the problems of less bosh gas, poor pre-reduction of charge, and insufficient furnace heat in all-oxygen blast furnaces, so as to improve fuel utilization. , high emission, good quality effect

Inactive Publication Date: 2012-10-31
WISDRI ENG & RES INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is: according to the prior art, a kind of raw material hot charging, combined production process of full-thermal oxygen blast furnace and shaft furnace is proposed. The problem of poor pre-reduction of the charge, the joint production of the all-oxygen blast furnace and the gas-based shaft furnace makes a large amount of blast furnace gas reasonably utilized, saving energy and reducing emissions

Method used

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  • Joint production process of crude fuel hot charging and total heat oxygen blast furnace and vertical furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The combined production process of hot charging of raw materials and fuel, full thermal oxygen blast furnace and shaft furnace, the steps are:

[0015] 1) Preparations for raw material thermal charging, full thermal oxygen blast furnace and shaft furnace combined production system:

[0016] The combined production system of raw material and fuel hot charging, full thermal oxygen blast furnace and shaft furnace includes a blast furnace 1 and a gas-based shaft furnace 15; The input port is connected, the heat exchanger 3 (the heat exchanger 3 uses air as the heat exchange medium, the hot air from the heat exchanger 3 passes through the combustion air pipe 4 to the heater 13, and is used as combustion air, and the combustion air pipe 4 goes is the combustion-supporting air after heat exchange) the air output port is connected with the combustion-supporting air input port of the heater 13 by the combustion-supporting air pipe 4, and the blast furnace gas output port of the ...

Embodiment 2

[0029] Basically the same as Example 1, the difference is:

[0030] The hot charging temperatures of coke, sinter and pellets are 600°C, 700°C and 800°C respectively.

[0031] According to theoretical calculation, 3000m 3 The blast furnace uses pellets and sintered ore as raw materials, and 750°C pure oxygen (volume purity of more than 80%) is blown in from the tuyere. Its production technical indicators are as follows:

[0032] Oxygen consumption: 300Nm 3 / tHM,

[0033] Focal ratio: 150Kg / tHM,

[0034] Coal ratio: 370Kg / tHM,

[0035] Furnace top gas volume: 840Nm 3 / tHM,

[0036] Furnace top gas volume: 840Nm 3 / tHM,

[0037] Furnace top gas composition (volume): CO: 45.28%, CO 2 :35.75%, H 2 :8.35%, H 2 O: 7.1%, Others: 3.52%,

[0038] Shaft furnace fuel (volume) H 2 / CO:1.2:1,

[0039] Shaft furnace output: 750000t / a.

Embodiment 3

[0041] Basically the same as Example 1, the difference is:

[0042] The hot charging temperatures of coke, sinter and pellets are 800°C, 600°C and 700°C respectively.

[0043] According to theoretical calculation, 5000m 3 The blast furnace uses pellets and sintered ore as raw materials, and 850°C pure oxygen (volume purity of more than 80%) is blown in from the tuyere. Its production technical indicators are as follows:

[0044] Oxygen consumption: 290Nm 3 / tHM,

[0045] Focal ratio: 140Kg / tHM,

[0046] Coal ratio: 400Kg / tHM,

[0047] Furnace top gas volume: 820Nm 3 / tHM,

[0048] Top gas composition (volume): CO: 46.15%, CO 2 :33.75%, H 2 :8.35%, H 2 O: 9.1%, other 2.65%,

[0049] Shaft furnace fuel (volume) H 2 / CO: 1.1:1,

[0050] Shaft furnace output: 1200000t / a.

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Abstract

The invention relates to a joint production process of a crude fuel hot charging and total heat oxygen blast furnace and a vertical furnace, and is characterized in that hot charging of a furnace material of a blast furnace adopts total heat oxygen combustion, the heat oxygen temperature is not less than 650 DEG C, after heat exchange and CO2 removal, coal gas at the furnace top of the blast furnace is converted to generate H2 through water gas, a part of blast furnace gas without the CO2 can be mixed according to a volume ratio of H2 / CO of 1-2: 1, the pressure is increased to 0.5-0.7 MPa, the blast furnace gas is heated to 800-900 DEG C, and sponge iron is produced for a gas-based vertical furnace. According to the invention, the problems of less blast furnace bosh gas volume, insufficient heat of a furnace body and poor pre-reduction property of the furnace material of the total oxygen blast furnace can be solved by hot charging of raw materials, through joint production of the total oxygen blast furnace and the gas-based blast furnace, a large amount of blast furnace gas is reasonably utilized, energy is saved, emission is reduced, and ultra-low carbon dioxide emission is realized.

Description

technical field [0001] The invention relates to a combined production process of hot charging of raw materials and fuel, full-heated oxygen blast furnace and shaft furnace. Background technique [0002] At present, more than 90% of the world's pig iron production is produced by the traditional blast furnace ironmaking process. The traditional blast furnace ironmaking process blasts hot air at a temperature of 1000-1300 ° C into the blast furnace through a hot blast stove. The oxygen enrichment rate of the blast is below 10%. The coke in the gyration zone and the injected coal powder are burned to produce gas that moves upwards and undergoes complex heat exchange and reduction reactions with the descending ore to obtain pig iron. The coke ratio is usually 300-400Kg / tHM, and the coal injection ratio is about 100-200Kg / tHM. The production of coke requires high-quality coking coal, and the production of coke itself is also a high energy consumption, high CO 2 The production pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/02C21B13/14C21B5/00
CPCY02P10/122
Inventor 李菊艳唐恩周强喻道明范小刚刘行波王小伟
Owner WISDRI ENG & RES INC LTD
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