Hydrogen and metal product accompanying production method and system

A technology of metal products and production methods, applied in the field of metallurgy, can solve the problems of high prices, difficult to effectively manage green products and traditional products, etc., achieve high environmental protection level, and realize the effect of high-efficiency utilization of waste heat

Active Publication Date: 2021-06-15
TIANJIN FLASH IRONMAKING TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002]At present, the metallurgical industry is facing more and more stringent carbon neutral requirements, and the general practice of metallurgical enterprises is to wait for new green energy (in the production process zero carbon emissions), for example, the iron and steel industry is waiting and trying green electricity and green hydrogen to make steel, but because the price of green energy is much higher than that of traditional energy, it is difficult for enterprises to Effectively manage the behavior of putting green products and traditional products on the market

Method used

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  • Hydrogen and metal product accompanying production method and system
  • Hydrogen and metal product accompanying production method and system
  • Hydrogen and metal product accompanying production method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for producing hydrogen and metal products together, comprising the steps of:

[0046] S1. From the top of the smelting space of the flash metallurgical equipment, dry metal oxide ore powder and oxygen are added to the smelting space above 1300°C filled with high-temperature hydrogen. The ore powder particles are in full contact with hydrogen, and the reduction reaction occurs quickly. The solid-liquid product enters the melting pool of the flash metallurgy equipment, and the flue gas enters the upper channel of the melting pool and flows toward the ascending flue;

[0047] S2. Methane is injected into the molten pool at a temperature of 1450°C-1550°C, and the methane is cracked into carbon black and hydrogen; at the same time, oxygen is injected into the molten pool, and the excess H produced by oxygen and cracking 2 Combustion, supplementing heat for the molten pool, the excess hydrogen floats into the flue gas and flows in the direction of the ascending flue;...

Embodiment 2

[0053] like figure 2 As shown, on the basis of Embodiment 1, the flue gas purification system 2 in this embodiment includes a dust removal device 21, a fan 22, a dehydration and decarbonization device 23, and a hydrogen cabinet 24 connected in sequence through pipelines. The inlet port of the dust removal device 21 is connected to the The outlet end of the heat exchange flue 12 is connected, and the hydrogen gas outlet end of the hydrogen tank 24 is connected with the inlet end of the cold medium flow channel 14 .

[0054] The working process of the production system accompanied by hydrogen and metal products described in the present embodiment is as follows:

[0055] S1. From the top of the smelting space 11 of the flash furnace 1, dry iron ore powder and oxygen are added to the smelting space 11 at 1300°C-1650°C filled with high-temperature hydrogen. The ore powder particles are fully in contact with the hydrogen gas, and the reduction reaction occurs quickly, and the ore p...

Embodiment 3

[0060] like image 3 As shown, on the basis of Embodiment 1, the difference from Embodiment 1 is that two kinds of cold medium passages are arranged in the heat exchange flue 12, which are cold medium passage one 17 and cold medium passage two 18 , the two cold medium channels are not connected to each other; the cold medium in the cold medium channel one 17 is high-concentration hydrogen returned after flue gas treatment, and the cold medium channel one 17 passes the high-concentration hydrogen through heat exchange and heating The pipeline is sent into the smelting space 11; the cold medium in the cold medium flow channel 2 18 is high concentration CO returned after decarburization 2 Gas, cold medium channel two will be high concentration CO 2 After the gas is heated up, it is sent into the molten metal layer through the pipeline.

[0061] In this embodiment, the flue gas purification system 2 includes a dust removal device 21, a fan 22, a dehydration and decarbonization d...

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Abstract

The invention provides a hydrogen and metal product accompanying production method and system. The hydrogen and metal product accompanying production system comprises a medium flash furnace and a flue gas purification system. The medium flash furnace comprises a smelting space, a heat exchange flue and a molten pool. The outer wall or the interior of the heat exchange flue is provided with a cold medium flow channel, the outlet end of the cold medium flow channel is connected with a hydrogen inlet in the top of the smelting space, the inlet end of the flue gas purification system is connected with the outlet end of the heat exchange flue, the hydrogen outlet end of the flue gas purification system is connected with the inlet end of the cold medium flow channel, and the flue gas purification system is used for separating hydrogen in flue gas from other impurities and then conveying the hydrogen back into the medium flash furnace. According to the hydrogen and metal product accompanying production method and system, by means of the hydrogen production and metal smelting accompanying production mode, green hydrogen is produced in a large scale at a low cost, affordable green steel is provided for the market, and meanwhile net zero emission of carbon in the whole technological process is achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a production method and a production system for hydrogen and metal products. Background technique [0002] At present, the metallurgical industry is facing increasingly stringent carbon neutral requirements. The general practice of metallurgical enterprises is to wait for the development of new green energy (zero carbon emissions in the production process). For example, the steel industry is waiting And try green electricity and green hydrogen to make steel, but because the price of green energy is much higher than that of traditional energy, it is difficult for enterprises to effectively manage the behavior of putting green products and traditional products on the market during the transition period. Therefore, it is urgent to find a method that can use the redundant environment of hydrogen production to smelt metals or use the redundant environment of smelting me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/00C01B3/24C09C1/48
CPCC21B13/0073C21B13/0006C01B3/24C09C1/48C01B2203/0272C01B2203/06C01B2203/1241Y02P10/20Y02P10/143
Inventor 邱江波夏明黄小兵施小芳
Owner TIANJIN FLASH IRONMAKING TECH CO LTD
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