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A technology of pelletizing and belt roasting machine, which is applied in the field of iron ore pellet production, and can solve problems such as the decline in the quality of pellets
Active Publication Date: 2019-11-22
SHOUGANG CORPORATION
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[0004] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a method and device for generating pellets, which are used to solve the problem of pellet quality when the belt roaster uses coal or low calorific value fuel for production in the prior art. Falling Technical Issues
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Embodiment 1
[0029] This embodiment provides a method for generating pellets, which is applied in a belt roaster, and the method includes:
[0030] S110, controlling the temperature of the gasification gas to be 350-450°C, and controlling the pressure of the gasification gas to be 45-55KPa;
[0031] here, see figure 2 , The gasifier 1 is connected to the belt roaster 2, and firstly based on coal, oxygen and water vapor, the gasifier 1 is used to react to generate gasified coal gas. The outlet temperature of the gasification gas is controlled at 350-450° C., and the pressure of the gasification gas is controlled at 45-55 KPa through the pressure regulator 3 .
[0032] The gasification gas is transported to the gas branch pipe 5 of the belt roaster 2 through the high temperature pipeline 4, the gasification gas enters the burner 6 of the belt roaster through the gas branch pipe 5, and the gasification gas is the combustion chamber 7 of the belt roaster Provides heat flow. Here, the flow ...
Embodiment 2
[0042] This embodiment provides a device for generating pellets, such as image 3 As shown, the device includes: a generation unit 31, a first control unit 32, a second control unit 33 and a third control unit 34; wherein,
[0043] see figure 2 , the gasifier 1 is connected to the belt roaster 2, and the generation unit 31 first uses the coal gasifier 1 to react to generate gasified coal gas based on coal, oxygen and water vapor. The first control unit 32 is used to control the outlet temperature of the gasification gas to 350-450° C., and to control the pressure of the gasification gas to 45-55 KPa through the pressure regulator 3 .
[0044] Then the gasification gas is transported to the gas branch pipe 5 of the belt roaster 2 through the high temperature pipeline 4, and the gasification gas enters the burner 6 of the belt roaster through the gas branch pipe 5, and the gasification gas is the combustion chamber of the belt roaster 7 to provide heat flow. Here, the flow r...
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Abstract
The invention provides a method and a device for producing pellet ores. The method comprises the following steps of: controlling the temperature of gasified gas to be 350-450 DEG C and controlling thepressure of the gasified gas to be 45-55 KPa; controlling the current air volume of a main draught fan of a belt type roasting machine to be increased by 3% to 8% than a history air volume; and controlling the current roasting area of a roasting section of the belt type roasting machine to be increased by 5% to 8% than a history roasting area. Therefore, the temperature of the gasified gas is controlled to be 350-450 DEG C in order to guarantee the temperature required by combustion of the pellet ores; the pressure of the gasified gas is controlled to be 45-55 KPa in order to guarantee the flowing speed of the gasified gas; the combustion value of the gasified gas is low, so the combustion value of the gasified gas is increased by increasing the air volume so as to guarantee a heat transfer effect; the roasting area is increased by 5% to 8% so that the speed, flowing through a material layer, of the flue gas of the gasified gas is regulated to be in a proper range; and by the above-mentioned comprehensive optimization, the quality of the pellet ores can be finally guaranteed when the belt type roasting machine is used for producing the pellet ores by using coal or a low-heat-valuefuel.
Description
technical field [0001] The invention belongs to the technical field of iron ore pellet production, in particular to a method and device for generating pellets. Background technique [0002] At present, in the production of pellets, because of the strong production capacity of a single belt roaster, the annual output can reach 7 million tons of pellets, so it is the mainstream equipment for producing pellets. [0003] However, the fuel used in the belt roaster must be high calorific value fuels such as natural gas or heavy oil. When coal or low calorific value fuels are used, the quality of the produced pellets will not meet the requirements. However, due to the limited and high prices of domestic natural gas and heavy oil resources, the processing cost of pellets has increased. Contents of the invention [0004] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a method and device for generating pellets, which are used to s...
Claims
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