CN118813309A - A method for forming and pelletizing biomass fuel injected into blast furnace - Google Patents
A method for forming and pelletizing biomass fuel injected into blast furnace Download PDFInfo
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- CN118813309A CN118813309A CN202411165745.3A CN202411165745A CN118813309A CN 118813309 A CN118813309 A CN 118813309A CN 202411165745 A CN202411165745 A CN 202411165745A CN 118813309 A CN118813309 A CN 118813309A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
- C10L5/445—Agricultural waste, e.g. corn crops, grass clippings, nut shells or oil pressing residues
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
- C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
- C10L5/105—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with a mixture of organic and inorganic binders
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/34—Other details of the shaped fuels, e.g. briquettes
- C10L5/36—Shape
- C10L5/363—Pellets or granulates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
- C10L5/442—Wood or forestry waste
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
- C10L2230/22—Function and purpose of a components of a fuel or the composition as a whole for improving fuel economy or fuel efficiency
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/08—Drying or removing water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/24—Mixing, stirring of fuel components
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/28—Cutting, disintegrating, shredding or grinding
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/30—Pressing, compressing or compacting
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/32—Molding or moulds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/54—Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel
- C10L2290/546—Sieving for separating fractions, components or impurities during preparation or upgrading of a fuel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Wood Science & Technology (AREA)
- Agronomy & Crop Science (AREA)
- Processing Of Solid Wastes (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
本发明公开了一种高炉喷吹生物质燃料成型制粒方法，包括以下步骤：S1：利用太阳能或者专门的干燥设备对原料进行初次干燥，将原料的含水量降低到10‑20％；S2：将干燥后的各种原料利用切割机进行切割处理，让其切割成小块；S3：将小块的原煤和生物质原料破碎至200mm以下，并通过筛分装置筛选出预定粒度的粉煤和生物质。将高炉喷吹无烟煤、烟煤的粒度控制在100目‑150目之间，保证煤粉在回旋区内较高的燃烧效率，减少未燃煤粉量、提高燃料利用率。生物质及处理后的生物质燃料由于其具有更好的燃烧性、反应性，同时由于过小的粒度将使生物质燃料在高炉喷吹输送过程中易粘结，因此降低生物质燃料制粉成本，保证输送效率和燃烧效率。
The invention discloses a blast furnace injection biomass fuel molding and granulation method, comprising the following steps: S1: using solar energy or special drying equipment to perform initial drying of raw materials, and reducing the water content of the raw materials to 10-20%; S2: using a cutting machine to cut the dried various raw materials into small pieces; S3: crushing small pieces of raw coal and biomass raw materials to less than 200mm, and screening out pulverized coal and biomass of predetermined particle size through a screening device. The particle size of anthracite and bituminous coal injected into the blast furnace is controlled between 100 mesh and 150 mesh, ensuring a high combustion efficiency of coal powder in the cyclotron zone, reducing the amount of unburned coal powder and improving fuel utilization. Biomass and processed biomass fuel have better combustibility and reactivity, and because too small a particle size will make the biomass fuel easy to stick during the blast furnace injection and transportation process, the cost of biomass fuel pulverization is reduced, and the transportation efficiency and combustion efficiency are ensured.
Description
Technical Field
The invention relates to the technical field of biomass fuels, in particular to a method for granulating a blast furnace injection biomass fuel.
Background
As economies develop, there is an increasing demand for energy. The use of fossil energy sources in large quantities causes serious pollution to the atmosphere. Biomass energy is a form of energy in which solar energy is stored in biomass in the form of chemical energy, and biomass has the characteristics of high volatile matter, low N, S content and low ash. The combustion process has the characteristic of zero emission of CO2, and is used as a biomass boiler at present.
At present, agricultural waste produced in China is very abundant, wherein, straw produced in each year is about 7 hundred million tons, which is equivalent to 5 hundred million tons of standard coal, because agricultural waste has low general calorific value, small density and large volume, is not easy to transport, the thermal efficiency of direct combustion is only 10% -30%, the direct combustion also brings pollution problem, so that the direct utilization of the agricultural waste is greatly restricted, while forestry waste has the following characteristics, carbon dioxide absorbed by photosynthesis is equivalent to the total amount of carbon dioxide released by combustion thereof in the biomass growth process, and from the aspect of life cycle, the carbon dioxide is released by biomass combustion, and the increase of carbon dioxide content in the atmosphere is not brought, therefore, if the biomass is combined with the agricultural waste mutually, the biomass granular fuel can be prepared, partial fuels such as coal, petroleum and the like can be replaced, and the problems of resource shortage and environmental pollution are alleviated, however, most of the biomass fuels produced and used at present have simple and random composition ratio, so that the condition of insufficient combustion and low energy generation capacity can occur in actual use.
For the problems in the related art, no effective solution has been proposed at present.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides a method for forming and granulating biomass fuel by blowing in a blast furnace, which aims to overcome the technical problems in the prior related art.
For this purpose, the invention adopts the following specific technical scheme:
A shaping and granulating method for blast furnace injection biomass fuel comprises the following steps:
s1: the raw materials are primarily dried by solar energy or special drying equipment, and the water content of the raw materials is reduced to 10-20%;
s2: cutting the dried raw materials into small pieces by using a cutting machine;
s3: crushing small raw coal and biomass raw materials to below 200mm, and screening out pulverized coal and biomass with preset granularity through a screening device;
S4: heating the pulverized coal and the biomass to a preset temperature respectively or together according to a proportion, and keeping the temperature for a preset time;
S5: then, the crushed pulverized coal and biomass are subjected to spiral stirring, pressurizing extrusion, mutual friction kneading and crushing and mechanical crushing, so that the granularity and flexibility of the biomass are improved;
S6: the molding process is to compress the raw materials mixed by the materials, cut the materials after compressing, and form small particles;
S7: dehydrating the quenched and cured biomass raw material by air cooling, stirring the biomass raw material at the same time to control the water content of the biomass raw material to be 10% -30%, and uniformly mixing the biomass raw material;
s8: screening the cooled granular fuel through a vibrating screen, and screening out crushed aggregates contained in the cooled granular fuel to ensure the delivery quality of the biomass granular fuel;
s9: and obtaining the biomass granular fuel with the granularity of 100-150 meshes.
Preferably, in the step S5, the biomass is naturally warmed up at the same time, and the bound water and the active organic matters in the biomass are extruded to form a natural binder.
Preferably, in the step S8, the crushed aggregates after being screened are collected and returned to the previous process for reconstruction.
Preferably, in the step S9, the water content of the biomass pellet fuel is controlled to be 8-18% or less.
Preferably, dust removal is also performed before the step S5, and the light dust in the raw material is sucked out by negative pressure.
Preferably, in the step S7, the raw material is further subjected to iron removal after air-cooled dehydration and stirring, and iron particles in the raw material are removed by magnet adsorption.
Preferably, in the step S9, the qualified granular fuel after screening is weighed, and then transported to a bagging machine by a conveying bag to be packaged into bags, and finally enters a finished product warehouse.
Preferably, the fuel crushing mode is controlled by a four-roller crusher and a twin-roller crusher.
The beneficial effects of the invention are as follows: the granularity of the anthracite and the bituminous coal sprayed by the blast furnace is controlled between 100 meshes and 150 meshes, so that the higher combustion efficiency of the pulverized coal in a swirling zone is ensured, the amount of unburned coal powder is reduced, and the fuel utilization rate is improved. The biomass and the processed biomass fuel have better combustibility and reactivity, and meanwhile, the biomass fuel is easy to bond in the blast furnace injection and conveying process due to the excessively small granularity, so that the pulverizing cost of the biomass fuel is reduced, and the conveying efficiency and the combustion efficiency are ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a step flow diagram of a method for shaping and granulating a blast furnace injected biomass fuel according to an embodiment of the invention.
Detailed Description
For the purpose of further illustrating the various embodiments, the present invention provides the accompanying drawings, which are a part of the disclosure of the present invention, and which are mainly used to illustrate the embodiments and, together with the description, serve to explain the principles of the embodiments, and with reference to these descriptions, one skilled in the art will recognize other possible implementations and advantages of the present invention, wherein elements are not drawn to scale, and like reference numerals are generally used to designate like elements.
According to the embodiment of the invention, a method for granulating a blast furnace injection biomass fuel is provided.
Embodiment one;
As shown in fig. 1, the method for granulating the blast furnace injection biomass fuel according to the embodiment of the invention comprises the following steps:
step S1: the raw materials are primarily dried by solar energy or special drying equipment, and the water content of the raw materials is reduced to 10-20%;
Step S2: cutting the dried raw materials into small pieces by using a cutting machine;
Step S3: crushing small raw coal and biomass raw materials to below 200mm, and screening out pulverized coal and biomass with preset granularity through a screening device;
Step S4: heating the pulverized coal and the biomass to a preset temperature respectively or together according to a proportion, and keeping the temperature for a preset time;
Step S5: then, the crushed pulverized coal and biomass are subjected to spiral stirring, pressurizing extrusion, mutual friction kneading and crushing and mechanical crushing, so that the granularity and flexibility of the biomass are improved;
Step S6: the molding process is to compress the raw materials mixed by the materials, cut the materials after compressing, and form small particles;
step S7: dehydrating the quenched and cured biomass raw material by air cooling, stirring the biomass raw material at the same time to control the water content of the biomass raw material to be 10% -30%, and uniformly mixing the biomass raw material;
step S8: screening the cooled granular fuel through a vibrating screen, and screening out crushed aggregates contained in the cooled granular fuel to ensure the delivery quality of the biomass granular fuel;
Step S9: and obtaining the biomass granular fuel with the granularity of 100-150 meshes.
Embodiment two;
As shown in fig. 1, in the step S5, the biomass is naturally warmed up at the same time, and the bound water and the active organic matters in the biomass are squeezed out to become a natural binder.
In the step S8, the crushed aggregates after being screened are collected and returned to the previous process for reconstruction.
In the step S9, the water content of the biomass pellet fuel is controlled to be below 8-18%.
Embodiment three;
As shown in fig. 1, dust removal is also performed before the step S5, and light dust in the raw material is sucked out by negative pressure.
In the step S7, the raw materials are further deironized after air-cooled dehydration and stirring, and iron particles in the raw materials are removed through magnet adsorption.
In the step S9, the qualified granular fuel after screening is weighed, and then transported to a bagging machine by a conveying bag to be packaged into bags, and finally enters a finished product warehouse.
The fuel crushing mode is controlled by a four-roller crusher and a double-roller crusher.
In summary, by means of the technical scheme, the granularity of the anthracite and the bituminous coal sprayed by the blast furnace is controlled to be between 100 meshes and 150 meshes, so that the higher combustion efficiency of the pulverized coal in a swirling zone is ensured, the amount of unburned coal powder is reduced, and the fuel utilization rate is improved. The biomass and the processed biomass fuel have better combustibility and reactivity, and meanwhile, the biomass fuel is easy to bond in the blast furnace injection and conveying process due to the excessively small granularity, so that the pulverizing cost of the biomass fuel is reduced, and the conveying efficiency and the combustion efficiency are ensured.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. The shaping and granulating method for the blast furnace injection biomass fuel is characterized by comprising the following steps of:
s1: the raw materials are primarily dried by solar energy or special drying equipment, and the water content of the raw materials is reduced to 10-20%;
s2: cutting the dried raw materials into small pieces by using a cutting machine;
s3: crushing small raw coal and biomass raw materials to below 200mm, and screening out pulverized coal and biomass with preset granularity through a screening device;
S4: heating the pulverized coal and the biomass to a preset temperature respectively or together according to a proportion, and keeping the temperature for a preset time;
S5: then, the crushed pulverized coal and biomass are subjected to spiral stirring, pressurizing extrusion, mutual friction kneading and crushing and mechanical crushing, so that the granularity and flexibility of the biomass are improved;
S6: the molding process is to compress the raw materials mixed by the materials, cut the materials after compressing, and form small particles;
S7: dehydrating the quenched and cured biomass raw material by air cooling, stirring the biomass raw material at the same time to control the water content of the biomass raw material to be 10% -30%, and uniformly mixing the biomass raw material;
s8: screening the cooled granular fuel through a vibrating screen, and screening out crushed aggregates contained in the cooled granular fuel to ensure the delivery quality of the biomass granular fuel;
s9: and obtaining the biomass granular fuel with the granularity of 100-150 meshes.
2. The method according to claim 1, wherein in the step S5, the biomass is naturally heated at the same time, and the bound water and the active organic substances in the biomass are extruded to form a natural binder.
3. The method for granulating a biomass fuel by injection into a blast furnace according to claim 1, wherein in said step S8, the selected crushed aggregates are collected and returned to the previous step for granulating again.
4. The method for shaping and granulating biomass fuel by blast furnace injection according to claim 1, wherein in said step S9, the water content of the biomass pellet fuel is controlled to be 8-18% or less.
5. The method for granulating as recited in claim 1, wherein the step S5 is preceded by dust removal, and the light dust in the raw material is sucked out by negative pressure.
6. The method for granulating as recited in claim 1, wherein in the step S7, iron is removed from the raw material after air-cooled dewatering and stirring, and iron particles in the raw material are removed by magnet adsorption.
7. The method according to claim 1, wherein in step S9, the qualified pellet fuel after screening is weighed, and then transported to a bagging machine by a conveying bag for bagging, and finally enters a finished product warehouse.
8. The method for granulating a biomass fuel by injecting a blast furnace according to claim 1, wherein the fuel crushing mode is controlled by four-roll and twin-roll crushers.
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| CN202411165745.3A CN118813309A (en) | 2024-08-23 | 2024-08-23 | A method for forming and pelletizing biomass fuel injected into blast furnace |
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| CN202411165745.3A CN118813309A (en) | 2024-08-23 | 2024-08-23 | A method for forming and pelletizing biomass fuel injected into blast furnace |
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