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Issued by the U.S. economy to read the Institute of Supply Industrial Index for the month of June a value of 49.7, compared with $ 53.5 the previous reading for the month of May / May, and so the current reading is worse than analysts' expectations, which indicated a value of 52.0.As for the prices paid to read of the Institute of Industrial supply for the month of June came a value of 37.0, compared with $ 47.5 the previous reading for the month of May / May, and so is the current reading is also worse than analysts' expectations, which indicated a value of 45.8.

Shallow talk on the bugs which affect the crushing process

Crushing process are related to many factors. In summary, there are three main factors: mills structures of, ore attributes, and operation conditions. However, at a production site, equipments are fixed, which should be regarded as a fixed factor, while ore attributes and operation conditions should be considered as key factors on the quality and quantity of products. In order to guarantee the quality of products mills produce, operators must adjust feeding amount and choose a most appropriate operation condition according to the ore's changing nature (granularity, hardness etc.)

New type jaw crushers are also called high efficiency energy-saving fine jaw crushers which are designed and manufactured by Zhongke Engineering Technology Co., Ltd for nearly one moth.

It's known to us that there are lots of fields need to crush and grind materials such as mining, metallurgy, construction and so on. All the materials should be grinded and crushed from big one into fineness according to customers' requirements.

As we all know that crushing cost too much both energy and money. Since then how to improve efficiency of crushing is one biggest problems.

Crushers are mainly used in many fields such as construction, mining and so on. However most of such kinds of equipments have various of disadvantages such as maintenance, capacity and so on.

Grinding strip plays an important role in fine grinding, while impact effect is rarely. Wet ball mill points out: grinding strip has something to do with the material's surface area. Therefore, on the base of providing enough grinding stretchy, the machine trys to enlarge the grinding area. While enlarging the grinding area have to reduce the materials' size. Long before, different shapes materials, such as cone, cube, round pad, and etc, has been used for grinding materials. Wet ball mill proved their effects were worse than long round stick or sphericity. The most commonly used spherical and stick materials, stick is suitable for coarse grinding, and ball is suitable for fine grinding. However, the ball's surface area is bigger than stick, so the sphericity is more suitable for fine grinding process.

Fine grinding requires less materials filling rate. The motion in ball mill medium have two kinds: throw fell type and purging fell type. Throw fell type is priority to produce wallop, wet ball mill is suitable to crush coarse grained ores. Purging fell type is producing the grinding, in which impact is slight and suitable for U3t fine grinding process. However, only in the condition of less materials filling rate, purging fell type is more likely to produce, so the filling rate fine in grinding process is lower than the coarse grinding process. Metal mine grinding is the same as it.