Wind-sorting drum lead-power machine

Abstract

The present invention relates to the improvement of the cooling and cooling, oxidation air supply and powder raising of the winnowing type drum lead powder machine, which is characterized in that the cooling spray extends from the axial opening of the drum to the inside of the drum; There is a lead particle feeding device protruding from the casing at the feed inlet, and an air inlet at the discharge or near the discharge end of the casing; a number of tapered separation plates with sharp cones facing the direction of rotation are arranged radially and alternately on the inner wall of the drum. Directly cool down the lead pellets (powder), the hysteresis effect of temperature control is small, the temperature control accuracy is high, the temperature control can reach within ±1°C, and the fluctuation of the oxidation degree of the produced lead powder is small; the short stay of water or water vapor, and the lead pellets (powder) Contact accelerates the oxidation rate of lead particles, increases the production capacity of powder making, and can increase the output by about 5-8% compared with indirect cooling. Secondly, the oxidation supply air is heated by the interlayer between the drum and the casing, and then enters the drum. The temperature of the air supply is stable, the oxidation quality of lead powder is good, and the oxidation degree is stable. The conical separation plates protruding toward the center and the sharp cones facing the direction of rotation are arranged alternately on the inner wall of the drum, which can still ensure the normal lifting of the lead powder without the fan. The lead powder machine with the same production capacity has a simple structure and can save about 15% of the total power.

Description

technical field [0001] The invention relates to a winnowing type drum lead powder machine, in particular to the improvement of cooling, oxidation air supply and powder lifting of the lead powder machine. Background technique [0002] Air separation drum lead powder machine such as figure 1 , is a special equipment for the production of lead powder for batteries. In the pulverizing process, lead grains (or lead weights) 9 collide with each other, frictionally oxidize into lead powder 10 during the rotation of the drum 4, and the temperature inside the drum rises. At the same time, the surface of the lead grains contacts the air entering the drum at a certain temperature and is Oxidation is again an exothermic reaction. The above pulverizing process will generate a lot of heat, so that the temperature in the drum of the lead powder machine will continue to rise, and the temperature rise will further accelerate the oxidation rate of the lead particles, making the temperature ...

AI Technical Summary

Problems solved by technology

This method of indirectly cooling the lead particles (powder) by spraying water on the outer wall of the drum has the disadvantage that the cooling of the lead particles (powder) in the drum is realized by cooling the outer wall of the drum, and then the temperature is measured by the discharge port to control the spraying of cooling water. The hysteresis effect of showering, cooling and temperature control is relatively large, and the most accurate temperature control also has an error of ±2°C, resulting in a large error and fluctuation in the actual temperature control of lead particles (powder) in the drum, and the fluctuation of the oxidation degree of lead powder in production is still large; and the drum The temperature of the outer wall is high, usually above 100°C, so that the cooling water sprayed on the surface of the drum immediately turns into water vapor, so it is necessary to install a dehumidification fan to discharge it out of the outer cover, which deteriorates the production environment

This kind of powder raising method needs to be fed into high-pressure airflow, which not only requires a high-power high-pressure fan, but also increases the power consumption of powder raising; it also needs to be equipped with complicated blowing pipes and nozzles (not shown in the figure) and accessory devices in the drum. Many, complex structure, cumbersome installation

In addition, high-voltage and high-power fans also have high working noise and poor working environment.

In particular, during the operation of the lead powder machine, if the powder suction fan is damaged, the lead powder will be blown out of the drum due to the positive pressure of the powder, polluting the environment

[0007] The above-mentioned deficiencies make the air separation drum lead powder machine not only consume a large production power, but also the production quality is unstable and fluctuates greatly.

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