Single Stage Crushing From -400mm To -25mm
Dear Experts,
Can u please suggest a single stage crusher for the following application
Material : Imported coal
Moisture:30%
Fines in Input : 40%
Input Size : -400mm ( Sieve analysis not available from client)
Out size required : -25mm (98%)
Output fines : Newly generated fines < 15% ■
Re: Single Stage Crushing
Threads merged into one as there is no need to post twice on the same topic. It only confuses others that would like to help you.
You are asking for a 16:1 turndown ratio which is very large in the crushing world and would be very inefficient. You may want to consider a two stage crushing system.
Rule of thumb is 6:1 turndown for highest efficiency. ■
Gary Blenkhorn
President - Bulk Handlng Technology Inc.
Email: garyblenkhorn@gmail.com
Linkedin Profile: http://www.linkedin.com/in/gary-blenkhorn-6286954b
Offering Conveyor Design Services, Conveyor Transfer Design Services and SolidWorks Design Services for equipment layouts.
Single Stage Crusher
Your rejection of fines exceeding 15% is not defined. GIven the top size of the product is 25 mm, can you provide the cutoff size defined as fines?
As Gary says, 6:1 is typical for reduction ratios of common comminution stages. However, there may be machines that can do your specification. Are the fines cutoff on a typical Rosin-Ramler curve? DO you scalp the -25 mm product before crushing? ■
Re: Single Stage Crushing
Dear Nordell,
Thanks for your reply
1. Yes, we have a vibrating grizzly screen before the crusher to eleminate (-)25mm.
however, the crusher has been sized considering 100% feed (blanked grizzly).
2. (-)1mm is considered as fines.
We have received a crusher offer and we are still enquiring about the amount of fines generated.
Please advise if there are any reference installation similar to the above application.
Regards
H.Sathish ■
Coal Etc.
The only way to really eliminate fines as an issue is
to install a compactor pelletizer to make use of them.
So is it safe for me to assume that you are not using a
pulverised coal boiler system?
Ideally you simply want a high tonnage per hour "Coal Sizer"
with twin sizer rolls to break the coal and then dealing with
a vibrating grizzly is no longer an issue as it can be eliminated.
The fines can be compacted or extruded with a binder such as oil
to aid in the extrusion process. to the size you would require for
coal feed stock.
There are more than a handfull of coal crusher sizer builders that
maintain a world wide presence on all continents except Antartica
and Greenland. ■
Single Stage Crusher
Dear lzaharis,
The system has a pulverised coal boiler only, but the restrisction for fines is to avoid the dust nuisance in the stock yard and in the conveying system (Present after crushing). Client is more concerned about this because input coal itself has fines of about 40% and also the plant falls with in the city limit.
Regards,
Sathish ■
What Is The Feed Size?
Dear Sir,
You have stated that the material is imported coal and indicated the top size as (-) 400mm. Imported coal is received with a top size of (-) 50mm (90%) and 10% between 50 and 75mm.
The data if correct then it is both indigenous coal as well as imported coal.
Please clarify.
Regards
KS Dilip
Chennai ■
What Is The Feed Size?
Yes you are correct. But this is as per the input received from client.
Regards,
Sathish. ■
Single Stage Crushing
Single Stage Crushing from -400 mm to -25 mm
Dear experts,
Please suggest me a single stage crusher for the following application.
Input : -400mm (sieve analysis not available)
Required output : -25mm (98%)
TPH : 1800 TPH rated , 2000 TPH Design
Material : Imported Coal
Moisture content : 35%
Fines : new fines generated due to crushing shall not exceed 15% ■