Blast furnace top charging tank without venting and charging method thereof
A technology that does not need to be released or fed The effect of low maintenance costs, good economical and environmentally friendly results
Active Publication Date: 2017-09-29
WISDRI ENG & RES INC LTD
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Problems solved by technology
However, for the first type of scheme, the investment is high, and the gas recovery is slow, which has an adverse effect on the pressure equalization and release process and the clean gas pipeline network. For the second type of scheme, the buffer device is large in size, resulting in a large area and the consumption of other resources. , the economic benefit is poor; for the third type of scheme, the economic benefit is poor
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[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0023] The blast furnace top batch tank feeding method that does not need to vent in the embodiment of the present invention, such as figure 1 shown, including the following steps:
[0024] S1. After the pressure is equalized using the traditional pressure equalization method, the discharge gate is opened, and the charge enters the blast furnace from the charge tank;
[0025] S2. After the blanking is completed, keep the blanking gate open, open the internal space control device to reduce the internal space of the material tank, and the gas in the material tank is compressed back into the blast fu...
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The invention discloses a blast furnace top material tank that does not need to be released and a charging method thereof. The method comprises the following steps: after the pressure equalization is completed by using a traditional pressure equalization method, the charging gate is opened, and the charging material enters the blast furnace from the charging tank; After that, keep the feeding gate open, open the internal space control device to reduce the internal space of the feeding tank, and the gas in the feeding tank is forced back into the blast furnace; when the internal space of the feeding tank is reduced to a certain volume, close the feeding gate and Close the valve, close the internal space control device to restore the internal volume of the material tank to its original state, and the internal pressure drops to normal pressure; open the feeding gate and add material to the material tank. The invention can realize zero discharge of gas in the furnace top material tank.
Description
technical field [0001] The invention relates to the technical field of ironmaking, in particular to a blast furnace top charging tank capable of realizing zero gas discharge from the furnace top charging tank and a charging method thereof. Background technique [0002] The increasingly stringent environmental protection requirements and market situation in the steel industry require steel companies to save energy, reduce emissions, and reduce costs. At present, the blast furnace ironmaking process pollution emissions account for the majority of the entire iron and steel industry emissions, therefore, it is particularly necessary to reduce the ironmaking process emissions. [0003] At present, the traditional pressure equalization and release of blast furnace charging is to use semi-clean gas and nitrogen to equalize the pressure of the material tank to the pressure of the blast furnace top to realize the discharge into the blast furnace. When releasing, the raw gas in the ma...
Claims
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IPC IPC(8): C21B5/06C21B7/00
Inventor 王小伟叶伟
Owner WISDRI ENG & RES INC LTD