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A technology for hydrogen metallurgy and hydrogen enrichment, applied in the fields of metallurgy and energy, can solve the problems of reducing production efficiency, heat energy utilization rate of less than 40%, cost and other problems
Inactive Publication Date: 2010-07-07
樊显理
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However, a large amount of carbon dioxide emissions in this ironmaking method is still the fundamental problem; and the finely ground selected iron concentrate powder and coal powder, catalyst, desulfurizer, etc. are further mixed and moistened into a particle size of 0.04mm accounting for the total powder volume 90%, and mixed pellets, the manufacturing difficulty is higher, the working conditions of the workers are poor, and the product cost will be significantly increased
[0007] 2. Hydrogen energy background technology: Without cheap hydrogen energy, it is impossible to carry out hydrogen metallurgy, and it is impossible to realize hydrogen energy in automobiles, tractors, ships, airplanes, and basic human life
However, if it is to be applied to ironmaking and hydrogen energy production, there are still the following disadvantages: (1) the power is too small. At present, the world's successful industrial application of ion devices has a maximum power of 2.8 megawatts and a maximum operating current of 10kA. The plasma metallurgical furnace used as a substitute for blast furnace ironmaking should be above 100 MW and 100kA; (2) the cathode of the plasma gun of the existing smelting device is made of water-cooled tungsten, niobium, tantalum, molybdenum, hafnium, zirconium, etc. Manufactured by adding oxides of thorium, cerium, yttrium, ytterbium, etc. to refractory metals, practice has proved that when the working current exceed
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[0072] Example 1: "Natural gas or coal bed methane and other hydrocarbon fuel gas cracking hydrogen metallurgy" example (attached figure 1 , The dotted line in the figure indicates: hydrogen production raw materials that can be used, the peak and valley power of hydro-wind power stations that can be used, the processes that can be added or applied, and the products that can be produced):
[0073] Ironmaking raw materials: Anshan, Liaoning, China selected iron ore concentrate powder: TFe66.3%, MnO0.3%, SiO 2 1.2%, Al2031.03%, CaO1.79%, MgO0.79%, S0.02%, P0.017%. The particle size of 200 mesh accounts for 90%; this is a typical market-selected iron concentrate powder, rather than a specially processed iron concentrate ultrafine powder. When the "electric supplementary heating fluidized bed" or other fluidized bed proposed in the patent application No. 200610106689.1 is used as the "hydrogen metallurgical pre-reduction furnace" for pre-reduction, this dry fine ore can be used directl...
Example Embodiment
[0082] Example two, the "hydrogen metallurgical method for pyrolysis of lignite and other high-hydrogen coal or plant dry powder", attached figure 2 :
[0083] Ironmaking raw materials: common iron concentrate ore pellets in the market: TFe62.5%, SiO24.5%, Al2032.9%, S0.02%, P0.07%. The particle size is 5-10mm. Various iron concentrates in domestic and international markets, including particle size Selected iron ore powder of <0.1mm, and 10-20mm iron ore concentrate dried and dehydrated pellets made by adding a small amount of binder.
[0084] Hydrogen production raw material: a refined dry milled brown coal dry powder, composition (wt): C69.1%, H5.5%, 020.8%, N1.4%, S0.1%, ash 2.5%, coal powder particle size <0.1mm; It can also be used for chopped, dry and milled plant dry powder with a water content of ≤1% and the same particle size. The ratio of entering the furnace is 100kg / t of finely washed lignite dry powder or 150kg / t of plant dry powder.
[0085] The structure of the meta...
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Abstract
A hydrogen metallurgy method and a relevant device relate to the technical field of hydrogen metallurgy and hydrogen energy source. A pre-reduction furnace is used for rapidly pre-reducing iron ore concentrate granules in a hydrogen-rich, high temperature and high pressure condition to produce sponge iron with a reduction degree of more than or equal to 75 percent and the sponge iron is delivered to a cracking furnace in a heat-preserving enclosed mode; the cracking furnace cracks @ type fuel gas into high-temperature hydrogen and nano @@ through direct current plasma electric arc in a high-temperature oxygen-poor condition, most of the high-temperature hydrogen is delivered to the pre-reduction furnace and the sponge iron is rapidly molten and reduced to smelt molten iron or semi-steel; simultaneously, the residual heat of tail gas from the pre-reduction furnace is used for producing high-temperature steam which is electrolyzed by a water steam electrolytic cell to prepare high-temperature pure hydrogen; and after water in the high-temperature pure hydrogen is separated by heat exchange, the high-temperature pure hydrogen is returned to the pre-reduction furnace and partial high-temperature pure hydrogen is directly delivered as the hydrogen energy source. High efficiency, energy conservation, the best product quality and the optimal emission reduction effect of hydrogen metallurgy are fully shown.
Description
technical field [0001] The invention relates to the fields of metallurgy and energy. In particular: natural gas, coal bed methane, underground coal gas, shale gas, combustible ice and other hydrocarbon gases, lignite and other high-hydrogen-containing coals, and plant dry powder direct-current plasma arc high-temperature anoxic direct cracking hydrogen production; metallurgical waste heat high-temperature steam Electrolytic hydrogen production; hydrogen-rich reduction to produce sponge iron; sponge iron melting and final reduction to produce molten iron or semi-steel; and its carbon dioxide, sulfur dioxide, nitrogen oxide emissions are close to zero, and highly energy-saving; hydrogen energy can also be output to supply hydrogen for vehicles Energize. Background technique [0002] 1. Hydrogen metallurgy background technology [0003] Giant blast furnace ironmaking is still the current mainstream metallurgical ironmaking technology. This technology is very mature, with huge...
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