Key factors affecting the quality index of mineral powder ball press
There are many factors affecting the quality index of the powder ball press. The nature of the raw coal and the forming method determine that the properties of the raw coal such as coalification degree, cohesiveness and moisture are very important factors affecting the strength of the ball press.Such as different molding methods, properties of raw coal, coal blending, type and amount of binder, particle size and composition of coal, molding conditions, shape and size of briquette, and other external conditions.Generally speaking, the briquette obtained by the hot pressing process has the best cold and hot strength, followed by lime carbonized briquettes, clay briquettes and clay-pulp waste liquid briquettes, and the clean water wet coal rods are the worst.
Most of the production uses a mineral powder ball press. This machine has a large production capacity, a compact structure and a uniform ball shape, but it has a short pressing time and a low molding pressure.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, a corresponding axial and radial clearance adjustment mechanism should be provided.The shape and smoothness of the bowl of the ball powder ball press is an important factor affecting the demoulding. Generally, a pillow type ball bowl with a small thickness is generally used.Although the final product is spherical, it is still in the form of a liquid film due to the influence of technology, and the molding strength is not large.
The briquette equipment adopts a transporter with air ventilation and cooling, which can simultaneously cool the briquette while conveying the briquette, and adopt corresponding anti-crushing device.The mine powder ball press produces an energy product produced by the action of pulverized coal and a certain binder under pressure.Soft asphalt is the basic binder for matching coal technology. Because of its high price and 40% conversion to coke in the coking process, there is a disadvantage of more turnover loss.Soft asphalt is widely used in production and life, and it is a convenient and fast asphalt resource.Therefore, it is a key to the development of coal briquetting to find cheap, wide-source, and good-effect alternative soft asphalt.
