Jaw crushers are widely used in the crushing of various ores and bulk materials in mining and smelting, building materials, highways, railways, water conservancy and chemical industries. Jaw crushers are generally used as coarse crushing equipment in ore production lines, and their capacity has an important impact on the production efficiency of the entire production line.
Feeding is the first step of a crushing production line, and it is often crushed with a jaw crusher, which has an important impact on the production capacity of the jaw crusher. In order to increase the production capacity of the jaw crusher, the feeder must be used correctly. This article shares several feeding techniques, hoping to help you improve your jaw bankruptcy.
Strictly control the size of the feed, and no jam or blockage occurs
1. The design size of the jaw crusher feed port has such a formula: feed port size=(1.1~1.25)*maximum particle size of raw materials.
Many production personnel do not understand it, and always use the measured feed inlet size as the maximum feed size. Therefore, it is easy for the raw material to block the cavity if the raw material exceeds the prescribed large particle size. Although it is not blocked repeatedly, every time it is blocked, the equipment will not operate normally for a long time. Therefore, strictly controlling the particle size of the raw materials is one of the most important prerequisites for ensuring the normal operation of the jaw crusher.
2. Strictly control the feeding amount to prevent clogging due to excessive
Many companies have carried out technical transformations on the silos due to insufficient initial feedstock, which has seriously affected production. However, due to the lack of devices to limit the feed rate in the remodeled silos, another phenomenon of overcorrection often occurs, that is, excessive feeding. .
Since the working principle of jaw crusher is half-rhythmic work, if too much material is put in, the material will not be broken in time, and the broken material cannot be eliminated in time, resulting in material jam. Therefore, material interruption and excessive feeding will affect the production capacity of jaw crusher.
3. Rhythmic feeding, control feeding, to ensure the normal operation of the jaw crusher
At present, the crushing section of mineral processing enterprises mostly adopts end chute for feeding. 2/3 of the entire feeding equipment is even exposed outside the warehouse. Due to the remoteness of the feeding port, the feeding equipment is completely turned into a vibrating chute. The feeding speed is poor and the wear is severe. The best feeding position for the miner should be within the top 1/3 of the equipment, but it is strictly prohibited to feed the material vertically to prevent the equipment from losing its vibration ability or affecting the conveying effect.
Especially when dump trucks are used to unload materials directly, the disadvantages of vertical feeding are more serious. Therefore, how to adjust the angle of the lower silo to ensure that the feeding is smooth and without pressing, and the rhythm of the feeder is consistent with the processing rhythm of the jaw crusher is the technical guarantee for normal feeding.
4. Adjust the feeder angle, make full use of the feeder's screening function to achieve pre-screening
Vibrating feeders are often equipped with grate bars and have some screening functions. However, in actual applications, due to the amplitude, feeding angle and other reasons, the equipment is prone to block jamming of the grate during screening, which makes it lose its original efficiency. In the face of this situation, many companies use steel plates to block the grate bar and turn it into a plate feeder.
In fact, with proper adjustment, the efficiency of vibration to the grate of the mining machine is extremely obvious. Adjusting the amplitude and angle of the mining machine, and fully releasing the screening function to the mining machine is the best way to increase the total throughput.
5. Reasonably adjust the jaw crusher's discharge opening and angle to increase the processing capacity of the equipment to the maximum extent
The size of the discharge port of the jaw crusher determines the processing capacity of the equipment. The jaw crusher is often used as a coarse crushing equipment, and the size of its discharge port should be based on the optimal feed size of the second-stage crushing, and the size of the discharge port cannot be arbitrarily increased or reduced.
The adjustment of the phagocytic angle (the angle between the movable jaw and the fixed jaw) needs to be strictly adjusted, generally within the range of 17~26° (specifically subject to actual conditions).
In addition, the horizontal stroke of the movable jaw, the engagement angle of the discharge layer, the speed, and the material humidity are also factors that affect the production capacity of the jaw crusher. You can adjust these factors to improve the jaw failure performance.
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