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Waste heat recycling refining furnace waste steel preheating device and system and using method

A waste heat recovery and preheating device technology, which is applied in the field of steelmaking, can solve the problems of failure to realize good utilization of exhaust gas, high dust content in exhaust gas, and high operating costs, and achieve the effects of reducing the difficulty of dust cleaning, simplifying the structure, and overcoming equipment costs

Pending Publication Date: 2021-06-22
河南太行机械工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing measures to increase the scrap steel ratio in the scrap steel preheating process are obtained by burning and baking with gas and burners, which has high operating costs, large energy consumption, and high environmental protection pressure
[0004] Moreover, the existing steel scrap preheating process will also generate relatively large waste gas. For example, the Chinese patent application number 201810746860.8 discloses a scrap steel preheating and feeding device for refining furnaces, which also uses external heating devices such as burners and Gas, although the exhaust gas in the refining furnace is used, the exhaust gas used is only used to control the pressure of the preheating furnace, and the exhaust gas has not been well utilized, and the dust content of the exhaust gas is still relatively high

Method used

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  • Waste heat recycling refining furnace waste steel preheating device and system and using method
  • Waste heat recycling refining furnace waste steel preheating device and system and using method
  • Waste heat recycling refining furnace waste steel preheating device and system and using method

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Embodiment 1

[0051] see Figure 1-11 , this embodiment provides a waste heat recovery and reuse refining furnace scrap steel preheating device, including a heating chamber 5, a chute 8 is installed at the bottom of the heating chamber 5, the chute 8 is a tubular structure or a cuboid structure, and is made of heat-resistant and wear-resistant materials. become.

[0052] Such as figure 1 and figure 2 As shown, the bottom of the chute 8 is connected with a refining furnace 10, and the chute 8 is used to slide scrap steel and send the scrap steel into the refining furnace 10; and the chute 8 can also draw out flue gas, so that the waste gas generated in the refining furnace 10 enters the heating In the bin 5, the effect of heating the steel scrap in the heating bin 5 is achieved.

[0053] In the heating chamber 5, it is fully wrapped by the high-temperature flue gas drawn from the refining furnace. The refining furnace produces high-temperature flue gas at 1500°C, which exchanges heat wit...

Embodiment 2

[0063] refer to figure 2 , in a further embodiment, the device also includes a material cup 2 for feeding, the material cup 2 has the function of automatic opening, the upper end of the material cup 2 is provided with a driving crane, and the driving crane has a weighing function, the The hoisting system is consistent with the existing hoisting system.

[0064] When the present embodiment is in use, a required amount of steel scrap is loaded into the material cup 2, and the vehicle is hoisted to the feed port 4, and the vehicle can also be weighed.

[0065] At this time, the gate 3 is opened, the gate 6 is closed, and the steel scrap enters the heating chamber 5 through the feeding port 4, and then the gate 3 is closed, and the steel scrap is fully wrapped in the heating chamber 5 by the high-temperature flue gas drawn from the refining furnace.

[0066] The refining furnace produces high-temperature flue gas at 1500°C, which exchanges heat with the scrap steel. The high-tem...

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Abstract

The invention discloses a waste heat recycling refining furnace waste steel preheating device and system and a using method, and relates to the field of steelmaking. The device comprises a heating bin, wherein a chute is installed at the bottom of the heating bin and used for sliding off waste steel and leading out smoke, a dust removal pipeline is arranged at the upper end of the heating bin, and the tail end of the dust removal pipeline is connected with a dust remover; a vibration bottom plate is arranged at the bottom of the heating bin; a flashboard with holes is arranged between the chute and the heating bin; and a feeding port is formed in the upper end of one side of the heating bin, and a high-temperature-resistant gate plate is arranged at the feeding port. By arranging the heating bin, the problem that steel production cost is increased due to the fact that waste steel preheating needs gas source combustion baking is solved, and the problem that cost is increased due to the fact that equipment such as a gas burner is additionally arranged is solved; the aim of preheating waste steel is fulfilled only by recycling high-temperature flue gas of a refining furnace and exchanging heat with the waste steel; the waste steel preheating device reduces cost, simplifies a waste steel preheating structure, is easy to manufacture, low in failure rate, safe, reliable, energy-saving, environment-friendly and convenient to operate.

Description

technical field [0001] The invention relates to the field of steelmaking, in particular to a waste heat recovery and reuse refining furnace scrap steel preheating device, system and use method. Background technique [0002] In the process of China's steel production and processing, gradually reducing the proportion of iron ore and increasing the proportion of scrap steel is the established policy of China's "Iron and Steel Industry Development Policy", and it is also an inevitable trend in the development of the iron and steel industry. [0003] The existing measures to increase the ratio of steel scrap in the preheating process of scrap steel are obtained by burning and baking with gas and burners, which has high operating costs, large energy consumption, and high pressure on environmental protection. [0004] Moreover, the existing steel scrap preheating process will also generate relatively large waste gas. For example, the Chinese patent application number 201810746860.8...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F27D13/00
CPCF27D13/00F27D17/004F27D17/008Y02P10/25
Inventor 时文魁郑宝海
Owner 河南太行机械工程科技有限公司