Sinter return fine adjustment method and system

Abstract

The invention relates to a sinter return fine adjustment method, which comprises the following steps of: respectively acquiring material level conditions of two material tanks for storing return fine; selecting no reduction of a return fine ratio, no increase of the return fine ratio or allowance of adjustment according to the material level conditions of the two material tanks; calculating a material level change rate of the material tanks in preset time, and calculating a return fine ratio adjustment quantity according to the material level change rate and an average total feeding quantity; if selecting the allowance of adjustment, adjusting the return fine ratio according to the return fine ratio adjustment quantity; if selecting no reduction of the return fine ratio and the ratio adjustment quantity is positive, adjusting the return fine ratio according to the return fine ratio adjustment quantity; and if selecting no increase of the return fine ratio and the ratio adjustment quantity is negative, adjusting the return fine ratio according to the return fine ratio adjustment quantity. The invention also provides a sinter return fine adjustment system. The method and the system realize refined adjustment of the return fine and meet the requirement of uniformly using the return fine.

Description

technical field [0001] The invention relates to the field of iron and steel smelting, in particular to a sintering return ore adjustment method and an adjustment system. Background technique [0002] see figure 1 , is a schematic diagram of the iron ore sintering compounding system. The trough group 10 includes a plurality of troughs, and each trough is equipped with a raw material. The raw materials include fine iron ore, flux, fuel, returned ore and miscellaneous materials. Each trough of the trough group 10 unloads various raw materials in a certain proportion to the mixing belt 11 below. The mixing belt 11 gathers various raw materials and sends them to the primary mixer 12 for primary mixing with water. The belt 13 is transported to the secondary mixer 14 for secondary mixing with water to form a mixture, which is then transported to the mixture tank 17 through the first burning belt 15 and the second burning belt 16. [0003] The mixing tank 17 is a buffer tank, whic...

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Problems solved by technology

[0007] Although this adjustment method can maintain the stability of the silo to a certain extent, simply increase or decrease the ratio of the return ore according to the existing return ore volume of the two hoppers, and the change in the return ore volume is relatively large or small. In some cases, if the silo is not manually adjusted, the return ore in the trough 10A and 10B will overflow, or the return ore will be short of material. Therefore, the existing return ore adjustment method is relatively rough and fine The degree of chemicalization is low, which cannot well meet the requirements of uniform use of returned ore

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