SUMEC TOUCH WORLD

Blast Furnace Hot Blast Stove

The primary function of the blast furnace hot blast stove is to continuously supply the blast furnace with high-temperature hot air above 1000°C. Modern advanced hot blast stoves can achieve temperatures up to 1300°C, which is crucial for intensified smelting in the blast furnace.

Classification

Blast furnace hot blast stoves can be classified into two types based on their working principles: regenerative and heat exchanger types.

Regenerative Hot Blast Stove

The regenerative hot blast stove uses checker bricks or regenerative balls as the regenerative medium. During operation, blast furnace gas heats the checker bricks or regenerative balls, which are then counter-blown with fresh cold air to convert it into high-temperature hot air. This hot air is then fed into the blast furnace for use.

Based on the combustion method, regenerative hot blast stoves can be further divided into top-combustion, internal-combustion, and external-combustion types. Among them, the top-combustion hot blast stove has a simple structure and requires less material, making it easier to achieve high temperatures and is considered the mainstream product for the future.

Heat Exchanger Hot Blast Stove

The heat exchanger hot blast stove uses a high-temperature resistant heat exchanger as its core component, which must be made of ceramic material rather than metal. The blast furnace gas fully combusts in the combustion chamber, and the resulting hot air passes through the heat exchanger to transfer its heat to fresh cold air, raising its temperature to above 1000°C.

Fuel Requirements

Hot blast stoves typically use a mixture of blast furnace gas and coke oven gas as fuel. Modern hot blast stoves can increase the temperature of the hot air to over 1200~1300°C using only blast furnace gas by preheating the combustion air and gas.

Basic Structure

The hot blast stove is a device used to heat and blow air into the blast furnace, making it an indispensable component of modern blast furnaces. The basic structure of the hot blast stove includes a combustion device, heat transfer device, regenerative medium, regenerative chamber, cold air chamber, as well as various inlets, outlets, and valves.

Combustion Device: The burners of hot blast stoves are generally designed for gas fuel combustion, including flameless burners for premixed combustion, short-flame burners for semi-premixed combustion, and long-flame burners for diffusive combustion.

Heat Transfer Device: To organize airflow and switch between airflow processes, the hot blast stove is equipped with a heat transfer device that transfers the heat of the high-temperature flue gas generated by combustion to the regenerative medium.

Regenerative Medium and Regenerative Chamber: The regenerative medium is mainly composed of stacked porous prismatic checker bricks or randomly placed spherical refractory balls. The regenerative chamber is a cylindrical space used to store the regenerative medium, withstand the pressure of the airflow, and support the force exerted by the checker bricks (or refractory balls), while maintaining an appropriate temperature environment for the regenerative medium.

Cold Air Chamber: The cold air chamber serves as a transitional space for the entry of cold blast air into the stove and the exit of hot flue gas from the furnace. Through this space, the blast air enters the hot blast stove, is heated by the checker bricks, and then sent into the blast furnace as hot air.

Working Principle

The working principle of the hot blast stove can be described as follows: In the stove, gas and air are mixed and combusted in the combustion device to produce high-temperature flue gas, which transfers its heat to the regenerative medium through the heat transfer device. After a certain period, the process is switched, and cold blast air is introduced. The cold blast air gains heat from the regenerative medium during heat exchange and becomes hot blast air, which is finally fed into the blast furnace for use.

Technical Characteristics

High Temperature: High temperature is an important technical characteristic of modern blast furnaces. Increasing the temperature of the hot blast air is a primary technical measure to increase coal injection rates, reduce coke ratios, and lower production costs.

Low Investment: Adopting advanced structural forms and technical measures for hot blast stoves can reduce equipment investment.

Long Lifespan: Optimizing the structural design and material selection of hot blast stoves can extend their service life.

Wuhan Nanrui Engineering Technology Co., Ltd. is a high-tech enterprise engaged in the research and development, manufacturing, marketing, and technical services of industrial automation, metallurgical complete sets of equipment, system engineering, and continuous casting special measuring instruments. The company's management department is located in Wuhan Donghu High tech Zone, Optics Valley, China, and the production and manufacturing base is located in the adjacent Gedian Economic and Technological Development Zone. At present, we have more than ten patents, copyrights, and software products with independent intellectual property rights. The equipment production plant covers an area of more than 30 acres and has obtained ISO9001:2008 quality system certification; Wuhan University of Science and Technology is a teaching and research practice base with the ability to provide corresponding equipment for the metallurgical industry in terms of production, complete design, and supporting facilities.

Wuhan Nanrui Engineering Technology Co., Ltd. is a high-tech enterprise engaged in the research and development, manufacturing, marketing, and technical services of industrial automation, metallurgical complete sets of equipment, system engineering, and continuous casting special measuring instruments. The company's management department is located in Wuhan Donghu High tech Zone, Optics Valley, China, and the production and manufacturing base is located in the adjacent Gedian Economic and Technological Development Zone. At present, we have more than ten patents, copyrights, and software products with independent intellectual property rights. The equipment production plant covers an area of more than 30 acres and has obtained ISO9001:2008 quality system certification; Wuhan University of Science and Technology is a teaching and research practice base with the ability to provide corresponding equipment for the metallurgical industry in terms of production, complete design, and supporting facilities.

Wuhan Nanrui adheres to the concept of "people-oriented, customer first", and has gathered a team of high-level scientific research and development, production and manufacturing, marketing, and engineering services that are sincere and united. Over the years, with its forward-looking decision-making, strong capabilities, excellent quality, and comprehensive after-sales service, it has established a good corporate image in China. The corporate spirit of dedication, cooperation, and innovation has created Wuhan Nanrui.

Wuhan Nanrui adheres to the concept of "people-oriented, customer first", and has gathered a team of high-level scientific research and development, production and manufacturing, marketing, and engineering services that are sincere and united. Over the years, with its forward-looking decision-making, strong capabilities, excellent quality, and comprehensive after-sales service, it has established a good corporate image in China. The corporate spirit of dedication, cooperation, and innovation has created Wuhan Nanrui.

Wuhan Nanrui Engineering Technology Co., Ltd. is a high-tech enterprise engaged in the research and development, manufacturing, marketing, and technical services of industrial automation, metallurgical complete sets of equipment, system engineering, and continuous casting special measuring instruments. The company mainly produces products such as spray marking machines, deburring machines, blast furnace hot blast stoves, taper gauges, and iron desulfurization. Our management department is located in Wuhan Donghu High tech Zone, Optics Valley, China, and our production and manufacturing base is located in the adjacent Gedian Economic and Technological Development Zone. At present, we have more than ten patents and copyrights with independent intellectual property rights, and have obtained ISO9001:2008 quality system certification; Capable of providing corresponding equipment for the metallurgical industry in terms of production, complete design, and supporting capabilities.

Wuhan Nanrui Engineering Technology Co., Ltd. is a high-tech enterprise engaged in the research and development, manufacturing, marketing, and technical services of industrial automation, metallurgical complete sets of equipment, system engineering, and continuous casting special measuring instruments. The company mainly produces products such as spray marking machines, deburring machines, blast furnace hot blast stoves, taper gauges, and iron desulfurization. Our management department is located in Wuhan Donghu High tech Zone, Optics Valley, China, and our production and manufacturing base is located in the adjacent Gedian Economic and Technological Development Zone. At present, we have more than ten patents and copyrights with independent intellectual property rights, and have obtained ISO9001:2008 quality system certification; Capable of providing corresponding equipment for the metallurgical industry in terms of production, complete design, and supporting capabilities.

Wuhan Nanrui Engineering Technology Co., Ltd. is a high-tech enterprise engaged in the research and development, manufacturing, marketing, and technical services of industrial automation, metallurgical complete sets of equipment, system engineering, and continuous casting special measuring instruments. The company mainly produces products such as spray marking machines, deburring machines, blast furnace hot blast stoves, taper gauges, and iron desulfurization. Our management department is located in Wuhan Donghu High tech Zone, Optics Valley, China, and our production and manufacturing base is located in the adjacent Gedian Economic and Technological Development Zone. At present, we have more than ten patents and copyrights with independent intellectual property rights, and have obtained ISO9001:2008 quality system certification; Capable of providing corresponding equipment for the metallurgical industry in terms of production, complete design, and supporting capabilities.

Wuhan Nanrui Engineering Technology Co., Ltd. is a high-tech enterprise engaged in the research and development, manufacturing, marketing, and technical services of industrial automation, metallurgical complete sets of equipment, system engineering, and continuous casting special measuring instruments. The company mainly produces products such as spray marking machines, deburring machines, blast furnace hot blast stoves, taper gauges, and iron desulfurization. Our management department is located in Wuhan Donghu High tech Zone, Optics Valley, China, and our production and manufacturing base is located in the adjacent Gedian Economic and Technological Development Zone. At present, we have more than ten patents and copyrights with independent intellectual property rights, and have obtained ISO9001:2008 quality system certification; Capable of providing corresponding equipment for the metallurgical industry in terms of production, complete design, and supporting capabilities.

Wuhan Nanrui Company has developed a mature and economically beneficial blast furnace coal injection technology based on its successful experience in large blast furnace coal injection technology; KR molten iron desulfurization and single blowing granular magnesium desulfurization systems have been successfully used in multiple steel mills in China; Wuhan Nanrui has a complete product line of various continuous casting complete sets of equipment, with 17 years of experience in the production and service of continuous casting complete sets of equipment. Its flying hammer continuous casting slab deburring machine has excellent deburring effect and is the pioneer of deburring technology for both the upper and lower end faces of stainless steel slabs; The continuous casting slab arc aluminum wire spray marking machine produced works stably, with clear handwriting, and adopts full process automatic control, running well; The stability, accuracy, and functionality of the taper meter and opening degree detector for slab crystallizers exceed the level of domestic peers, and their products have been widely recognized by domestic slab manufacturers; The environmentally friendly automatic carbon spraying system can achieve full process automatic control and continuous flow adjustment; The intelligent electric furnace bundle oxygen gun and carbon oxygen combustion system can completely replace similar foreign products. Independently developed high-temperature ink wash coating, with smooth and clear printing without clogging the nozzle.

Wuhan Nanrui Company has developed a mature and economically beneficial blast furnace coal injection technology based on its successful experience in large blast furnace coal injection technology; KR molten iron desulfurization and single blowing granular magnesium desulfurization systems have been successfully used in multiple steel mills in China; Wuhan Nanrui has a complete product line of various continuous casting complete sets of equipment, with 17 years of experience in the production and service of continuous casting complete sets of equipment. Its flying hammer continuous casting slab deburring machine has excellent deburring effect and is the pioneer of deburring technology for both the upper and lower end faces of stainless steel slabs; The continuous casting slab arc aluminum wire spray marking machine produced works stably, with clear handwriting, and adopts full process automatic control, running well; The stability, accuracy, and functionality of the taper meter and opening degree detector for slab crystallizers exceed the level of domestic peers, and their products have been widely recognized by domestic slab manufacturers; The environmentally friendly automatic carbon spraying system can achieve full process automatic control and continuous flow adjustment; The intelligent electric furnace bundle oxygen gun and carbon oxygen combustion system can completely replace similar foreign products. Independently developed high-temperature ink wash coating, with smooth and clear printing without clogging the nozzle.

Wuhan Nanrui adheres to the concept of "people-oriented, customer first", and has gathered a team of high-level scientific research and development, production and manufacturing, marketing, and engineering services that are sincere and united. Over the years, with its forward-looking decision-making, strong capabilities, excellent quality, and comprehensive after-sales service, it has established a good corporate image in China. The corporate spirit of dedication, cooperation, and innovation has created Wuhan Nanrui.

Wuhan Nanrui adheres to the concept of "people-oriented, customer first", and has gathered a team of high-level scientific research and development, production and manufacturing, marketing, and engineering services that are sincere and united. Over the years, with its forward-looking decision-making, strong capabilities, excellent quality, and comprehensive after-sales service, it has established a good corporate image in China. The corporate spirit of dedication, cooperation, and innovation has created Wuhan Nanrui.

Wuhan Nanrui adheres to the concept of "people-oriented, customer first", and has gathered a team of high-level scientific research and development, production and manufacturing, marketing, and engineering services that are sincere and united. Over the years, with its forward-looking decision-making, strong capabilities, excellent quality, and comprehensive after-sales service, it has established a good corporate image in China. The corporate spirit of dedication, cooperation, and innovation has created Wuhan Nanrui.