Novel raw material vertical milling and preparing system

Abstract

The invention provides a novel raw material vertical milling and preparing system which comprises a feeding belt, an airlock feeding device, a vertical mill, a whirlwind cylinder, a circulating fan and a circulating air pipe connected sequentially, and further comprises a spiral reamer, an elevator, a roller press feeding bin, a roller press and a roller press discharging hopper elevating machineconnected sequentially. The spiral reamer is connected with a coarse powder discharging pipe of a vertical mill powder concentrator in the vertical mill; a discharge hole of the roller press discharging hopper elevating machine is connected with the feeding belt; a slag rejection port of the vertical mill is connected with a feed inlet of the roller press discharging hopper elevating machine; andan air outlet of the circulating air pipe is connected with an air inlet in the bottom part of the vertical mill through a kiln tail hot waste gas conveying pipe. According to the novel raw material vertical milling and preparing system provided by the invention, a set of small roller press is additionally arranged outside the vertical mill through a special manner and is matched with the verticalmill for assistantly milling, so that the yield of the system can be improved, the powder milling power consumption of the system is reduced, and the novel raw material vertical milling and preparingsystem is a reconstruction method which is capable of improving the yield of the system, low in investment, short in construction period and less to influence an original vertical milling system.

Description

technical field [0001] The invention relates to a raw meal preparation system, in particular to a novel raw meal vertical mill preparation system. Background technique [0002] In the field of raw material preparation, the ball mill has been gradually replaced by the material bed grinding system. At present, the mainstream grinding system is the internal circulation vertical mill system and the final grinding system of the roller press. The final grinding system of the roller press belongs to the external material bed grinding system. Circulation system, the vertical mill internal circulation system belongs to the material bed grinding internal circulation system, the grinding efficiency of the two material bed grinding preparations is still difficult to confirm which equipment has the highest grinding efficiency, but due to its structural principle, the roller press The cost is lower than the vertical mill with the same output, and it has been widely used in industry recent...

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Problems solved by technology

[0002] In the field of raw material preparation, the ball mill has been gradually replaced by the material bed grinding system. At present, the mainstream grinding system is the internal circulation vertical mill system and the final grinding system of the roller press. The final grinding system of the roller press belongs to the external material bed grinding system. Circulation system, the vertical mill internal circulation system belongs to the material bed grinding internal circulation system, the grinding efficiency of the two material bed grinding preparations is still difficult to confirm which equipment has the highest grinding efficiency, but due to its structural principle, the roller press The cost is lower than the vertical mill with the same output, and it has been widely used in industry recently, but the adaptability of the vertical mill to high-moisture materials cannot be replaced by the roller press

[0003] Due to the technological progress of the cement firing system, some clinker production lines have achieved a certain increase in system output and reduced energy consumption. In addition, the peak power utilization of the grinding system makes it imminent to increase the production of the raw material grinding system. The raw material preparation system of the internal circulation vertical mill system accounts for a large proportion, and the transformation of the vertical mill system needs to be gradually put on the agenda. It is a common method to replace the original internal circulation vertical mill with the roller press final grinding system within the range of moisture allowance. method, but the investment cost is high, and the downtime required by the system is long

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