Vertical ventilation sintering machine and sintering process

Abstract

The invention discloses a vertical draft sintering machine and a sintering process. The sintering machine includes at least two sintering chambers arranged vertically at intervals. The top of the sintering chamber is the feeding end and the bottom is the discharging end. The grates are connected to the gas outlet flue, and the air inlet channel and / or the gas outlet flue are shared between two adjacent sintering chambers. The sintering process is to add the sintering mixture from the feed end of the top of the sintering chamber, and finally the sintered ore is discharged from the discharge end of the bottom of the sintering chamber; In the sintering chamber, the flue gas in the sintering chamber enters the gas outlet flue on the other side of the sintering chamber through the grate bar under the action of negative pressure and is discharged. The air inlet channel and / or the gas outlet flue are shared between two adjacent sintering chambers. The invention has the advantages of simple structure, small smoke generation, no air leakage problem, good stability, small occupied area, high waste heat utilization rate, improved sintered ore quality, energy saving and consumption reduction.

Description

technical field [0001] The invention relates to a sintering agglomeration process in the field of iron and steel metallurgy, in particular to a vertical draft sintering machine and a sintering process. Background technique [0002] Sintering is an important link in the iron and steel production process. After mixing raw materials such as iron ore powder, lime and fuel (anthracite, coke powder) uniformly in a certain proportion, the sintered ore with sufficient strength and particle size is formed after sintering. Clinker for ironmaking. [0003] In 1914, J.E.Greenawa lt invented the sintering pan for iron ore powder sintering. With the increasing demand for iron and steel and the expansion of production scale, the draft continuous belt sintering method evolved into the main sintering method. It is almost used in modern large-scale iron and steel enterprises. is the only option. When my country's iron and steel industry was founded in 1926, the sintering machine area was on...

AI Technical Summary

Problems solved by technology

[0008] The air leakage rate of the sintering machine is too large, which not only increases the power consumption, but also reduces the productivity, deteriorates the working environment and causes serious noise

[0009] (2) The amount of sintering flue gas produced is large, and the amount of flue gas (waste gas) generated by sintering ore is 6000m 3 Above, the dust concentration in the flue gas is high, resulting in the difficulty of subsequent dust separation, and the burden of flue gas treatment is heavy

Moreover, there is also a serious (40-60%) problem of air leakage

[0010] (3) The utilization rate of waste heat and waste energy of sintering flue gas produced by the existing belt-type draft sintering machine is low, and the waste heat and waste energy resources are large (currently 1.44GJ waste heat resources are produced per ton of sintering ore, and the recovery rate is less than 50%);

[0011] (4) The existing belt-type draft sintering machine still has large floor space, poor operation stability, large consumption of grate bars, and short replacement period

[0012] The structure of the existing belt-type exhaust sintering machine determines the running direction of materials and flue gas, which will inevitably bring about the occurrence of the above-mentioned problems

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