Water washing method and device for purifying calcite ores through rotating drum

Abstract

The present invention is a water washing method and device for purifying calcite ore using a rotary drum. The calcite ore is fed from the low end of the rotary drum and discharged from the high end, and is fed from the low end of the drum by means of the clean water inlet pipe and the return water inlet pipe running through the rotary drum. Continuously supply and return water to spray to the middle of the drum, and at the same time, continuously supply clear water to spray to the middle of the drum from the high-end discharge port of the drum, so that the calcite ore and the washing water flow countercurrently for washing. Due to the low-inlet and high-outlet washing method that flows in the opposite direction to the washing water, the pollution caused by the sewage flowing out in the same direction as the calcite ore is avoided. Adjusting the drum speed and water pressure and water volume can increase the output of washed calcite and reach the level of calcite. Purity, hue and whiteness indicators required by the process. The invention has the advantages of simple structure, easy operation, less investment, low energy consumption, stable and high-efficiency continuous production, so that some originally discarded calcite mine resources can be exploited again, and the mining rate and recycling rate of calcite mine resources are greatly improved. .

Description

technical field [0001] The present invention relates to a method and equipment for washing calcite raw ore, in particular to a washing method in which the calcite ore is low in and high out by using a rotary drum installed according to a small inclination angle and equipped with double helical flaps, and flows countercurrently with the washing return water and clean water. and devices. Background technique [0002] At present, the water washing equipment of calcite raw ore mainly adopts the washing equipment of vibrating grid sieve and down-tilt type (the ore inlet is higher than the ore outlet). Due to the large power of the excitation motor installed in the vibrating grid screen equipment, the calcite propulsion speed is very slow and the ore cannot be rolled during the washing process. Even if the amount of washing water is increased, it is difficult to wash the calcite ore. The down-tilting simple drum washing equipment is equipped with spray water pipes at both ends. C...

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Problems solved by technology

Due to the large power of the excitation motor installed in the vibrating grid screen equipment, the calcite propulsion speed is very slow during the washing process and the ore cannot be rolled over. Even if the amount of washing water is increased, it is difficult to wash the calcite ore.

The down-tilting simple drum washing equipment is equipped with spray water pipes at both ends. Calcite raw ore is fed from the high end of the drum with spray water, washed continuously by rolling, and finally discharged from the low end by clear water spraying. Due to limited The limitation of spraying water at both ends of the drum prevents the opening ratio and area of ​​the drum from being too large, otherwise the washing water will be quickly discharged out of the drum and the ore cannot be fully soaked and washed by the washing water. During the washing process, the ore rotates with the drum from the high-end There is no strong tumbling friction and impact effect when moving to the lower end, so it is difficult to remove impurities adhering to the surface of the ore. Washing according to this equipment and method cannot prevent the washing water from flowing out of the washing equipment together with the calcite mine, resulting in pollution of the calcite mine. The quality of calcite ore after washing cannot meet the requirements of high-quality calcite ore purity, hue and whiteness required for production

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