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2 years ago

What are the treatment method of middling?


Flotation of the final product is concentrate and tailings. But in the flotation process to produce intermediate products, namely the selection of tailings and scavenging concentrate, traditionally called middlings. According to the method of treatment of middling coenobium content, useful mineral floatability and requirements of the concentrate quality and. Common treatment options are the following four:

First, return to the appropriate place in the front of the flotation. This method can be used for processing is mainly composed of a monomer dissociation of mineral particles composed of the middling, the most common is sequential return, namely after operation of middling return to previous work, the minerals can be floating in general, and more emphasis on recycling rate, the use of the sequential return, the middling subject to re-election less chance, can avoid losses. If middlings floating better to concentrate and high, must increase the number of middling recleaning, adopting middling returned to oneness is after the merger of the middling returned to the Ministry of the appropriate operations, after the merger of the middling, often need to concentrate, and then return.

Return to form middling is often varied, sometimes by the test to determine the middling return place. General rules of middling return is middling, should return to the mineral composition and floatability and taste similar to work.

Second, middling regrinding. For coenobium more middling, requireregrinding. Re grinding can be carried out separately, and can be returned to the first grinding. When there is a part of the ore body in the single dissociation of the ore, it can be returned to the grading operations. When the surface of the ore needs to be mechanically cleaned, it can also return to the mill.

Third, single flotation middling. Sometimes middlings, although there was no intergrowth, but its nature is special, such as disseminated complex, difficult to float ore grains, mud wait, floating and ore difference, return in front of the work are not appropriate. In this case, the separate flotation middling.

Fourth, other methods. If it is not good to separate the flotation method, chemical processing method can be used to deal with it.

2 years ago

The basic knowledge of cone crusher operation


Because of the bad cone crusher work environments, if slightly do not pay attention to in the process of operation, will lead to all sorts of problems in running, so small make up for all the basic knowledge of cone crusher operation were summarized, in order to help you correct operating equipment in the production.

1.Properly adjust the firmness

Spring cone crusher pressure wants moderate, if too tight, the stress is easy to broken shaft accident, if the spring too loose, pressure is too small will cause the spring often beats, affect the normal work of the cone crusher, and make the product granularity coarsens.

Cone crusher drive belt firmness wants moderate, if the drive belt is installed too close, will cause the shaft rotation is not flexible, or rupture, if the drive belt is installed too loose, is not normal transmission, not operating to provide enough power for equipment, affect the normal production of the equipment.

2.To do a good job of lubrication equipment

Lubrication temperature not too high or too low, the equipment is easy to cause high operation temperature rise too high, cause bearing lock, etc. Temperature is too low to make poor lubricating oil flow, normal lubrication of imaging equipment.

In production to pay attention to replace lubricating oil regularly, if oil deterioration will accelerate gear and bowl watts, bushing wear, and even death in shaft sleeve research, so we should ensure that the lubricating oil clean.

3.Proper operation

Cone crusher should be sequentially starting and stopping, the equipment should be no-load starting, for smooth operation rear can feed, should pay attention to in the production of overload operation is prohibited. Outage should stop before charging, standby inner material emptying all rear can stop.

Cone break feed uniformly in the work, if will appear uneven feed production capacity is reduced, product size is too large. At the same time pay attention to the feeding cannot too wet too sticky, fine, not too much material particle size also cannot too big, otherwise it will cause stuffy car, of course, if the material cannot successful eduction, can also cause cone crusher stuffy car, so we should timely adjust the discharging mouth size depending on the situation.