How to improve the ball-forming rate of the ball press
1. Solve the cheap, wide source and good effect adhesive
Briquette is a coal product formed by processing one or several kinds of pulverized coal with a certain proportion of binder or sulfur-fixing agent under a certain pressure, and having certain shape and certain physical and chemical properties. As the basic binder of matching coal technology, soft asphalt has the disadvantages of high price, 50% conversion to coke material in the coking process, so the turnover loss is large, and soft asphalt can be widely used to produce pitch coke or needle coke. It is a valuable bitumen resource. Therefore, it is a key to the development of coking coal coking to find a cheap, widely sourced and effective binder instead of soft asphalt.
2. Coal material and binder are fully mixed
This is an important part of ensuring the most effective use of the binder and increasing the strength of the forming coal. The kneader is the key equipment for achieving full kneading.
3, reliable operation of the ball machine
Hydraulic ball presses are generally used. The ball press has a large production capacity, a compact structure, and a uniform type of pressed ball, but the pressing time is short, and the molding pressure is 20 to 50 mPa, which is sufficient for a cold pressed briquette with a binder. In order to compact the coal in a shorter compression time, a uniform cloth and feed adjustment device is provided. In order to ensure that the complete ball is pressed out, the two pressure rollers should also be provided with corresponding adjustment mechanisms for axial and radial clearance. The shape and smoothness of the ball bowl of the roller ball press are important factors affecting the smooth release of the ball. Generally, a pillow type ball bowl with a small thickness is generally used.
4. Cooling, conveying and anti-crushing of the ball
This is another important part of the guaranteed ball rate. Since the forming ball is carried out at 80~100mpa, the binder is evenly distributed on the surface of the coal particles, but it is still in the form of a liquid film, so the briquette strength is not large. The net transporter with air ventilation cooling can increase the strength while cooling the briquette while transporting the briquette, but shorten the transport distance, reduce the gap between operation and storage, and adopt the corresponding anti-crushing device. Some also unload the ball onto the pulverized coal conveyor belt and run it together with the pulverized coal to reduce the impact and improve the overall ball rate of the ball press.
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