Single Stage

Single Stage

The three stages of stone crushing operation

Equipment suitable for crushing large lumps as they come from the quarry or mine cannot be used to pulverize to fine powder, so the operation is carried on in three or more stages called primary crushing, secondary crushing, and pulverizing. The three stages are characterized by the size of the feed material, the size of the output product, and the resulting reduction ratio of the material. The crushing-stage output may be screened for greater uniformity of product size.

The reduction of materials such as stone, coal, or slag to a suitable size for their intended uses such as road building, concrete aggregate, or furnace firing. Reduction in size is accomplished by five principal methods: (1) crushing, a slow application of a large force; (2) impact, a rapid hard blow as by a hammer; (3) attrition, a rubbing or abrasion; (4) sudden release of internal pressure; and (5) ultrasonic forces. The last two methods are not in common use.

In open-circuit pulverizing, the material passes through the pulverizer once with no removal of fines or recirculation. In closed-circuit pulverizing, the material discharged from the pulverizer is passed through an external classifier where the finished product is removed and the oversize is returned to the pulverizer for further grinding.

Stone crusher and energy saving, are not related generically. Do you think so?

"Stone crusher is a kind of high energy consumption machine” ,many people said. So crusher manufacturers is launching high energy , circumstance friendly, low consumption stone crusher to meet the costomer’s higher needs.

For example: Initial developed large scale single stage hammer crusher can crush maximum 1 cubic meter crude ore to proper particle only off and its production capacity is 300-800TPH, which simplify the multi stage or two stage crushing to one stage(primary crushing). Soon after, Tianjin cement industry research institute developed high production capacity single stage hammer crusher of 1200TPH to apply a cement company, that get a measured results:
Stable capacity is 1200TPH
The percent of finished product size of 40mm is 94.59%
The main motor electricity consumption is 0.415Kwh/t.

Later,Tianjin institute cooperate with Hefei institute to develped the highest capacity single stage hammer crusher, the crushing ratio can reach 1:100, the maximum feeding size is 1.8*1.2*1.2m, per crusher capacity is 1600TPH, and suitable for processing  20% percent humidity material. Compared with the past examples, this crusher can save consumption more than 15%.

Nowdays, saving energy is more and more important .To protect our motherland, start from me, Henan Liming Road and Bridge Heavy industry Co., Ltd  produces several series mobile crushers and MTW mills with high capacity and low consumption to answer this call.

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