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Natural gas hydro-cracking metallurgical method and equipment

A technology of natural gas cracking and hydrogen metallurgy, applied in chemical instruments and methods, hydrogen, hydrogen separation, etc., can solve problems such as breakthroughs in pollution treatment

Active Publication Date: 2011-04-27
樊显理 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its CO2 emissions account for 9.2% of the country's total. The century-old pollution problem has not yet achieved a breakthrough in the unification of technology and economy.

Method used

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  • Natural gas hydro-cracking metallurgical method and equipment
  • Natural gas hydro-cracking metallurgical method and equipment
  • Natural gas hydro-cracking metallurgical method and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] "Basic implementation model of natural gas cracking hydrogen metallurgy" (attached figure 1 ), the basic smelting process steps are as above, and the technical parameters are: in step (1), produce 1000Kg molten iron with 120~160Kg natural gas, and input natural gas and sponge iron to the smelting and cracking furnace in the ratio of 120~160Kg natural gas; Sponge iron with a density greater than 70%, and according to the changes in the composition and pressure of the tail gas of the metallurgical cracking furnace and fluidized bed caused by the change in the chemical composition of the raw materials used, ensure that the working pressure is within the required range, and timely control the amount of natural gas added to the smelting cracking furnace and fluidization The reduction degree of the bed sponge iron can realize the balance between the supply and demand of hydrocarbons and the stability of the system pressure in the whole metallurgical process, so as to ensure th...

Embodiment 2

[0066] This process is the "implementation mode of hydrogen supplementation in natural gas cracking hydrogen metallurgy", and the smelting process steps are as follows figure 2 Shown, process parameter is: in step (1) with 80~140Kg natural gas: 1000Kg molten iron, the ratio input natural gas and sponge iron, in step (2), also must open source from the outside of this system, add by shut-off valve 19 5-20Kg of industrial pure hydrogen (the most ideal is the hydropower hydrogen produced and stored by full-load electrolyzed water during the peak period of hydropower flood water and the low power consumption period of evening holidays) and the industrial pure hydrogen obtained by separation of tail gas from smelting and cracking furnaces. Production of sponge iron with reduction degree > 90% in chemical bed;

[0067] Since the amount of natural gas added in step (1) is biased towards the low end of the range, the carbon produced by cracking can only basically meet the needs of th...

Embodiment 3

[0071] This process is " natural gas cracking hydrogen metallurgical carbon black co-production implementation mode ", and smelting process step is as shown in accompanying drawing 3, and process parameter is: in step (1) with 150~180Kg natural gas: 1000Kg molten iron, the proportioning input natural gas and Sponge iron, the carbon black bag filter 6 commonly used in the carbon black industry is added in step (2). The black is attached to the filter bag, and the anti-suction automatic shaking device is used to make the filter bag produce an imbibition effect, shake the carbon black from the filter bag, and send it to the carbon black processing workshop for granulation to produce carbon black products. Pass through the filter bag and flow into the next process for purification, desulfurization and CO conversion, and produce sponge iron with a reduction degree of >90%.

[0072] The characteristic of this process is that the amount of natural gas added is high-end, and the hydro...

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Abstract

The invention relates to a natural gas hydro-cracking metallurgical method and equipment, in particular to a metallurgical iron making method and smelting equipment for implementing the method. In order to solve the technical problems, the invention provides the metallurgical method capable of effectively reducing carbon dioxide emission of the metallurgical industry; the metallurgical method in the technical scheme adopted by the invention is the natural gas hydro-cracking metallurgical method; a high-pressure hollow electrode arc furnace or a high-pressure hollow electrode ore-smelting furnace is used as a smelting cracking furnace; and the method comprises the following steps of: cracking natural gas to prepare hydrogen through the smelting cracking furnace, directly feeding carbon black generated by cracking of the natural gas into high-temperature melted iron, smoothly performing smelting reduction of spongy iron on the manufactured saturated carbon-containing melted iron to produce molten iron, and then pre-reducing iron ore concentrate powder by using hydrogen to obtain the spongy iron. Meanwhile, the invention also provides the equipment suitable for the metallurgical method. The invention has the advantages that: the carbon dioxide emission tends to zero; and the method has low energy consumption, low cost and good product quality.

Description

[0001] Field: [0002] The invention relates to a metallurgical method and equipment. In particular, it relates to a green and environment-friendly metallurgical ironmaking method with high efficiency, energy saving and carbon dioxide approaching zero and smelting equipment for realizing the method. Background technique [0003] my country is already the world's largest iron and steel country and has attracted more and more attention from all over the world. However, its main metallurgical technology is the traditional coke blast furnace metallurgical technology and equipment. But from the current point of view, this technology has come to an end. The reason is that this technology relies heavily on coke, which is in short supply worldwide. On the other hand, this technology emits more than two tons of carbon dioxide for every ton of iron produced in the process of coking and blast furnace smelting. It is recognized as a major pollution source of the earth's atmospheric envi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/00C01B3/24C01B3/50
CPCY02P10/122Y02P10/143
Inventor 樊显理周绿漪樊华樊雷
Owner 樊显理
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