Objective
IN ORDER TO PRODUCE CEMENT, LIMESTONE IS OBTAINED FROM QUARRIES. IT IS THEN CRUSHED, MIXED WITH CLAY AND FED TO A CEMENT KILN FOR PRODUCTION OF CLINKER WHICH IS MILLED TO CEMENT.
THE FLUCTUATIONS ENCOUNTERED IN THE COMPOSITION (DUE TO INSUFFICIENT MIXING) OF THE RAW MATERIAL FED TO THE CEMENT KILN MUST GENERALLY BE COMPENSATED FOR BY OVER-BAKING WHICH LEADS TO ENERGY LOSSES. THE FACTORY KILN AT "LE BOUCEAU" CONSUMED 850 TO 1 000 KCAL/TON OF CLINKER PRODUCED WHILE VALUES OF 720 TO 800 KCAL/TON CAN BE ACHIEVED UNDER PROPER OPERATING CONDITIONS.. THE AIM OF THIS PROJECT IS TO DETERMINE THE PARAMETERS WHICH GOVERN THE MIXING OF THIS RAW MATERIAL SO THAT OPTIMUM ENERGY CONSUMPTION CAN BE OBTAINED.
BY DEVELOPING A NEW METHOD OF MARKING THE RAW MATERIAL WITH TRACERS, C.E.A. WAS ABLE TO STUDY THE EFFICIENCY OF THE HOMOGENISING SILOS AND THE PASSAGE OF THE MATERIAL THROUGH THE KILN, AS WELL AS OBTAINING A BETTER UNDERSTANDING OF THE OPERATION OF THE CRUSHER. IN ADDITION THE MIXING EFFICIENCY OF THE PRE-HOMOGENISING STOCKPILES WAS EVALUATED. THE RESEARCH WAS CARRIED OUT AT THE CEMENT FACTORY IN LE BOUCEAU NEAR BAYONNE.
RESULTS INDICATE THAT THE CRUSHER IS A GOOD MIXER. THERE IS A SHORT CIRCUIT IN THE HOMOGENISING SILO AND MIXING THERE NEEDS TO BE IMPROVED. PRE-HOMOGENISING STOCKPILE EXPERIMENTAL RESULTS INDICATE THAT THIS IS NOT A GOOD MIXER. THE AVERAGE RESIDENCE TIME OF THE MATERIAL IN THE KILN IS ABOUT 1 1/2 HRS. 10 % OF THE MATERIALS, HOWEVER, STAY LESS THAN 45 MINUTES WHILE ANOTHER 10 % STAY MORE THAN 4 HRS. HENCE, A PART OF THE MATERIAL WITH LOW RESIDENCE TIME WILL BE UNDER-BAKED WHILE ANOTHER PART WITH LONG RESIDENCE TIME IS HEATED TOO LONG RESULTING IN WASTAGE OF ENERGY.
PERFECT REGULATION OF RAW MATERIAL COMPOSITION WOULD LEAD TO 2 % DECREASE IN FUEL CONSUMPTION. AN ECONOMIC ASSESSMENT OF THE METHOD REVEALED A PAYBACK PERIOD OF 1 YEAR (INCLUDING THE COST OF THE STUDY AND OF ANY IMPROVEMENTS IN EQUIPMENT THAT THIS MAY INVOLVE).
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Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
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Coordinator
38041 Grenoble
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.