Henan Doing Mechanical Equipment Co.,Ltd
We are an integrated manufacturer for research and develop, production and sales of pelletizing machine .

How to maintain a die-roller assembly of a wood pellet mill?

The mold and rollers offered by us are of supreme quality with super high hardness and longer service life. But there are still lots of pellet mill manufacturers or die and roller producers out there taking careless about the material ingredients put into use, unfortunately, a disqualified die-roller assembly will not only produce subpar biomass pellets, but also be used just with a shortened life, and even crack or fissure unfavorably occurs to the die per se. Or shortly two rollers will be burnt badly. According to statistics, a die-roller assembly can be used constantly for biomass pelletization of about 1200 tons. After that, the die is subject to repair of die pores and the roller unit shall be replaced due to previously accumulated wear and tear. To tackle the issue, we will draw out client-oriented design and offer timely delivered spare parts to your side. Speaking of the press rollers, as we know, a complete pellet plant runs continuously at least for one work shift, that is to say, the die-roller assembly of a pellet mill will constantly rotate for at least 8 hours under high temperature and extreme pressure. Feedstock will be pressed tightly between the die and two rollers in the pelletizing chamber, and temperature of the chamber is consequently on the rise. Strictly, bearings of the two rollers shall be greased every one or at least every two hours to assure the rollers can smoothly revolve. Otherwise, those bearings will be burnt down or deformed (out-of-roundness may happen to the roller surface.) Our wood pellet mill will alleviate your concern for that and will rest assure you lubrication on bearings during running can be conducted.

With regard to the die, a new ring die shall be done with grinding-in for at least half an hour before put into official production. Because a new die still has some burs left on the newly drilled pores. Polishing the new is a must. Generally, a proportioned oily mixture (5% fine sand is supposed to be mixed with about 20% pure used oil and some feedstock) can be used as grinding-in material for die pores. However, you shall be warned of the imperative step. Later on, every time before pellet production comes to an end, the pellet mill shall be put with another kind of oily mixture (to this end, fine stand shall not be used but only some feedstock blended with pure used oil. Because long-standing use of fine sand mingled in oily mixture may lead to change of the compression ratio of die pores.) to purge out all material from die pores and to some extent to polish and lubricate the die as well. Otherwise, fed-in material will be tightly stuck in die pores due to the decline of temperature after work and hardly to be squeezed out even if in this regard oily mixture will be used yet in vain. Therefore, oily mixture shall be put into practice for real for about 20 minutes before pellet mill is shut down.

In a nutshell, the maintenance knowhow may not be got the hang of by a green hand once and for all, and operators are entitled to note down a routine checkup and maintenance item list. Also with the help of us, a better pellet mill performance or a highly efficient pellet plant can be obtained.

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