Device capable of protecting rotary kiln and ring cold machine and implementing micro-negative pressure operation of rotary kiln

Abstract

A device for protecting the rotary furnace and cooling machine and realizing the micro passive operation used in mineral production comprises a thrust valve at the top of sealing frame; the cylinder of thrust valve is welded with the sealing frame; the cylinder has a valve cover whose open end is connected to a weight; the steel wire under the weight coils the steel wire roller driven by the motor and reducer; when the temperature of furnace head is over high and the positive pressure is too high, the valve cover will be opened, to discharge the hot airflow and the powder in the frame instantly, and when the temperature and pressure are normal, the valve cover will be closed to confirm the micro passive pressure state. The invention can prolong the service life of rotary furnace and cooling machine.

Description

technical field [0001] The invention relates to a device used in the large-scale industrial production process of pellets. Background technique [0002] The roasting process of pellets is actually a high-temperature cooling process, which first absorbs heat and then releases heat. Most of them need to go through five stages: drying, preheating, roasting, soaking and cooling. The process is as follows: the finely ground iron ore concentrate powder is dehydrated, moistened, etc., and then it is precisely dosed with the binder. Kneading and extrusion produces green balls with a certain strength and particle size. After the green balls of different particle sizes are sorted by belts, shuttle conveyors, screening systems and other devices, the green balls with particle size and strength that meet the requirements are evenly distributed through the chute. On the grate bed, the raw balls in the thick material layer are driven by the drive wheel of the grate, and the temperature gr...

AI Technical Summary

Problems solved by technology

With the extension of the shutdown time, the high-temperature pellets in the hopper of the annular cooler accumulate more and more, and the heat energy generated thereby increases, which not only seriously affects the safe operation of the annular cooler itself, but may even cause the The shaft sleeve of the trolley is bent and deformed by heat, the lubrication condition inside the shaft sleeve deteriorates, the shaft sleeve is stuck, and the trolley cannot be turned over and reset.

At the same time, it becomes difficult for the first cold section of the ring cooler to blow through the thick material layer, and the positive pressure value of the rotary kiln head is too high, which makes it impossible to realize the micro-negative pressure operation of the rotary kiln

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