How to remove coal accumulation on the impact plate of a crusher?
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The crushers used in the second phase of our company’s ramming coke ovens are manufactured by Yangzhou Weijiang. However, due to the high hardness of the coal supplied to our company and the high production load, the fineness of the crushed coal never reaches the required levels. In cases where the coking time is short, the fineness is less than 80%, and sometimes it is even lower than that of the coal used in top-charging coke ovens. To address this issue, we have taken measures such as crushing the coal in batches, replacing the hammer heads, extending the impact plates, and reducing the gap between the impact plates and the hammer heads. Yet the results remain unsatisfactory. The reason for this is that, under the current conditions (with the coal moisture level around 11%), coal tends to accumulate on the impact plates, thereby reducing the impact force exerted by the coal blocks on those plates. We are looking for ways to reduce or eliminate this accumulation of coal on the impact plates. Please advise us; thank you
Please give some support; I’m eagerly awaiting advice from experts. The moderator has called for focused discussions – thank you
Weijiang certainly has the best performance in the coking and crushing industry, but it hasn’t made any changes to its equipment in over a decade; it gives the impression of being so large that it overwhelms its customers, as if the scale becomes a disadvantage. Coal accumulation in crushers is inevitable, but with proper design, the likelihood of such accumulation can be **reduced**. For this type of moisture content, we have adjusted the output rate from 3mm to 90%. The most important issues are the angle of the counterplate and the design of the crusher’s counter chamber.
Does \"counterattack chamber setting\" refer to adjusting the gap between the counterattack plate and the hammer? Are there any special requirements for setting the angle of the counterattack plate?
It’s not the gap between them; it refers to the structural angle at the time of initial design. As for the setting of the structural parameters, it is determined through continuous improvements by the designers before the product is finalized, based on a large amount of experimental data. Furthermore, is the design of the impact area at the feed end large enough to facilitate the impact crushing of large particle materials in this area, thereby improving feed adaptability? Ask the manufacturer to help adjust it and see if it works; if not, you can come to me again. :victory:
It is cleaned manually every 2 days; we have been doing this consistently, which helps to maintain stable fineness
I think Wei Jiang provides excellent service; he usually arrives as soon as there’s any problem. Moreover, Wei Jiang has upgraded his equipment – I’m not sure whether your factory is using the old models or the new ones
It doesn’t say their service is bad, does it? Your grades in Chinese really aren’t worth praising, let alone those in technical subjects. Just as Anshan Jiaonai Institute holds an unshakable position in terms of design within the industry today, has it made any significant breakthroughs in those areas over the years? I’m saying that there’s a lack of innovation, but after all they are the leaders in the industry; this is what I mean by the challenges that come with being at the top. I have no intention of attacking the Jiaonai Institute or other organizations; I’m merely expressing the view that current efforts in innovation are not sufficient, and more investment should be made in this area.