A particle size controllable sintering machine and sintering process

Abstract

The invention discloses a granulation controllable sintering machine and a sintering process. The sintering machine comprises a material distribution device and a sintering machine trolley, wherein the material distribution device is a granulation controllable material distribution device; the granulation controllable material distribution device comprises coke powder hoppers and multifunctional hoppers. The coke powder hoppers and the multifunctional hoppers are arranged above the sintering machine trolley. Materials are distributed at intervals in the sintering machine trolley in the heightdirection of an internal material layer through the coke powder hoppers and the multifunctional hoppers. Each multifunctional hopper comprises a coke powder distribution bin and a mixing distributionbin. The coke powder distribution bins are internally provided with coke powder. The bottoms of the coke powder distribution bins are provided with coke powder outlets. The mixing distribution bins are internally provided with mixed materials, and the bottoms of the mixing distribution bins are provided with mixed material spaced outlets. The coke powder outlets and the mixed material spaced outlets are arranged alternately in the direction of trolley wheel axles to achieve the purpose that the materials are arranged synchronously in a spaced mode in the direction of the trolley wheel axles. The granulation controllable sintering machine conducts stereoscopic cutting on coke powder layers for sintering ores to form sintering ore granules with the uniform granulation through vibration crushing. The production time is shortened. The waste heat recovery quality and efficiency are improved.

Description

technical field [0001] The invention relates to a sintering system for sintering ore, in particular to a sintering machine with controllable particle size and a sintering process. Background technique [0002] After the iron ore is beneficiated, it must be agglomerated before entering the blast furnace for ironmaking. The current agglomeration mainly adopts the method of roasting with a belt sintering machine. The sintering process is as follows: figure 1 , figure 2 and image 3 shown. The belt sintering machine is mainly composed of head wheel device 1, tail wheel device 2, material distribution device 3, sintering machine trolley 4, crushing device 5 and ring cooler 6. At the beginning, the distribution device 3 remains stationary, and the head wheel device 1 provides power to drive the sintering machine trolley 4 to move forward relative to the distribution device 3 through the tail wheel device 2 . The distributing device 3 fully mixes the iron ore powder, coke, li...

AI Technical Summary

Problems solved by technology

When the single-roller crusher is crushed, the grate of the crusher can only limit the size of the sintered ore in one direction, resulting in the size of some sintered ore particles far exceeding 150mm, and the maximum can reach more than 300mm, which cannot meet the size requirements of the finished sintered ore particles

In order to ensure that the particle size of the sintered ore meets the requirements, a double-roll crusher must be installed behind the single-roll crusher for secondary crushing operations, resulting in waste of procedures and costs

[0005] 2. The size of the sinter particles crushed by the single roller crusher is quite different, and the cooling heat transfer coefficient of the particles of different sizes is different.

Due to the inconsistency in the sensible heat release progress of the sinter particles cooled by the ring cooler 6, the cooling speed of the small particle size is fast, and the cooling speed of the large particle size is slow, which greatly affects the quality and efficiency of waste heat recovery;

[0006] 3. If the temperature of sintered ore particles is too high, it will easily cause equipment damage, and even cause accidents in severe cases

Therefore, the entire cooling process requires a large air volume and a long enough cooling time, which greatly increases the energy consumption of the sintering process and the investment in fixed assets

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