A kind of cement mill washing grinding method
A washing and grinding technology, applied in grain processing and other directions, can solve the problems of long washing and grinding time, waste of cement clinker, and quality fluctuation of low-grade cement, so as to improve washing and grinding efficiency, reduce clinker loss, and shorten washing time. The effect of grinding time
Active Publication Date: 2019-10-15
HANDAN JINYU TAIHANG CEMENT
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Problems solved by technology
[0003] This method has the following disadvantages: 1. The washing and grinding time is long, for example, it usually takes about one hour; 2. The high-grade cement enters the low-grade cement storehouse, which wastes cement clinker; 3. The high-grade cement enters the low-grade cement storehouse. Cause fluctuations in the quality of low-grade cement
These shortcomings are acceptable for simple tube mills. Now more and more production lines adopt the combined grinding technology with roller press, which greatly improves the production capacity, and the shortcomings are also magnified; It is not suitable for the needs of energy saving and high quality of cement, especially the cement grinding station, which is highly dependent on clinker, so it is particularly important to save clinker
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Embodiment 1
[0031] by figure 1 The system is taken as an example to illustrate, grinding aid is added to the grinding head, fly ash is added to the grinding tail, and mineral powder is added to the outside; when changing from P.S32.5 to P.O42.5 cement, grinding is required, and the specific content of the operating procedures as follows:
[0032] a) After receiving the notice of washing and grinding, control the load-bearing warehouse 3 to be located at the low position of 50% of normal production.
[0033] b) Stop the feeding of raw materials 12 at the batching station according to the notification time, and gradually empty the load-bearing bin 3, which takes about 8 minutes. During this period, gradually increase the air volume of the circulating fan 5 to maintain the amount of material feeding to the mill 7, so as to maintain the capacity of the elevator 8 out of the mill. The current is stable. When the current of the circulating hoist 1 shows no load, it is considered that the load-...
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The invention relates to a cleaning grinding method of a cement grinding mill. The cleaning grinding method includes the steps of firstly, controlling the load-bearing bin of a grinding system to be at 30-60% of a normal production bin position; secondly, stopping feeding, and emptying the load-bearing bin; thirdly, performing emptying grinding; fourthly, performing cleaning grinding. The method has the advantages that influence of the circulating quantity of a roller system and a grinding machine system on the cleaning grinding process is reduced, cleaning grinding efficiency is increased, cleaning grinding time is shortened, clinker waste caused by cement variety change is reduced, and cement quality fluctuation is reduced.
Description
technical field [0001] The invention belongs to the field of cement production, and relates to a method for washing and grinding a cement mill, which is suitable for a combined grinding system with a roller press and a semi-finishing grinding system for producing two or more varieties of cement with one mill. Background technique [0002] In the cement production process, sometimes the mill needs to take care of two or more types of cement grinding tasks, so it needs to be cleaned and ground during the conversion of cement quality from low grade to high grade. The general washing and grinding methods are: 1. Adjust the ratio according to the notice and start washing and grinding; 2. Take samples for inspection according to the regulations; [0003] This method has the following disadvantages: 1. The washing and grinding time is long, for example, it usually takes about one hour; 2. The high-grade cement enters the low-grade cement storage, which wastes cement clinker; 3. The...
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IPC IPC(8): B02C21/00B02C23/00B02C23/02B02C23/18B02C25/00
Inventor 姬文勇孟凡兴张晓峰倪立永
Owner HANDAN JINYU TAIHANG CEMENT