Coal crushing process
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I would like to know about the coal crushing process in the rammed coke process. We changed it later, so there’s nothing we can do; we have to mix it first and then break it apart. Let’s take a look at what everyone’s craftsmanship is like. It is a key process that can reduce costs. Feel free to speak up.
The book on coal preparation processes and equipment should cover this; take a look
Generally, mixing is done first followed by pulverization; some coals can be pre-ground first
One-third of our company’s coking coal is pre-crushed; the overall process involves mixing first and then crushing.
From an investment perspective, is it most cost-effective to first mix them together and then crush them later? This way, there’s no need for multiple crushing devices, nor is there a need to find a place to store the coal
With the development of coking, especially that of rammed coke, it is necessary to crush hard coal separately; therefore, I like the way the moderator on floor 5 answered. I hope everyone will avoid theoretical discussions and just state the method used in their own factory. Thank you!
In our factory, mixing occurs first and then grinding; it seems that most of the designs developed by Jiaonai Institute in the following years also followed this sequence of mixing first and then grinding.
Ours is to mix first and then powder it,,, we are currently considering installing some pre-crushing equipment...
Compacted coking requires a coal fineness of over 90%, and some coals may need to be pre-ground. Generally, mixing is done first followed by grinding
We first mix it and then grind it; sometimes too much bituminous coal is used, which results in a slight decrease in fineness. At that time we considered installing equipment for crushing the bituminous coal or crushing it in advance, but experiments showed that this had little impact on the fineness, so things have remained fine ever since.
We are currently testing the pre-crushing process. To fully realize the advantages of compacted coke, it is necessary to focus on coal rather than other factors.
The newly launched ramming coke projects generally adopt a process of mixing first and then crushing, with pre-crushing. Pre-crushing is carried out before placing the coal in the blending bin; coals that are difficult to crush are pre-crushed first before being fed into the blending bin.
In our laboratory, the ramming of small coke ovens is done by first adding the powder and then mixing; at Daye Iron and Steel Plant, they mix first and then add the powder, with a fineness of only 80%
Pre-crushing and selective crushing are indeed good options. The use of group crushing for the top-mounted version of 6985 is truly visionary.
We first mix and then grind, but pre-grinding is used; for bituminous coal, 1/3 coke, raw coal, etc., pre-grinding is necessary, and the results are very good
Here, it is first mixed and then powdered, with a fineness of 88%
Selective crushing is effective in reducing costs.
Bituminous coal has a large particle size, so pre-crushing is necessary; there is no need for such processing for coking coal, lean coal, or rich coal