Grinding system used for extracting vanadium from stone coal

Abstract

The invention is particularly relates to a grinding system used for extracting vanadium from stone coal. The grinding system comprises a vertical mill (5), a combustion furnace (1) and a bag-type dust collector (11); an air inlet (4) of the vertical mill (5) is communicated with a flue gas outlet (15) of the combustion furnace (1) through a first air valve (3), a first three-way pipe (2) and a pipeline; a material-air exhaust port (7) of the vertical mill (5) is communicated with an airflow inlet (10) of the bag-type dust collector (11) through the pipeline, a third air valve (8) and a second three-way pipe (9); and the first three-way pip (2) is communicated with the second three-way pipe (9) through a second air valve (14) and the pipeline. By importing hot waste gas of the combustion furnace (1) into the vertical mill (5) and the bag-type dust collector (11), the invention improves grinding efficiency and dedusting efficiency and enables waste heat use ratio of the hot water gas to be more than 85 percent; and moreover, by conveying fine grinded particles and dust in the flue gas to the bag-type dust collector (11), fine fraction grinded products can be effectively recovered, and simultaneously dedusting the hot waste gas and exhausted gas from the vertical mill (5).

Description

technical field [0001] The invention belongs to the technical field of grinding devices. In particular, it relates to a grinding system for extracting vanadium from stone coal. Background technique [0002] The vertical mill used for grinding is a grinding equipment that continuously grinds materials through the relative movement between the grinding disc and the grinding roller to achieve the grinding effect. Its power consumption is low and the particle size of the ground product is fine and the particle size distribution is uniform. It has been widely used in grinding operations of brittle materials such as cement and stone coal. When dealing with wet raw materials, the vertical mill must be used in conjunction with the hot blast stove, and the hot gas generated by the hot blast stove is used to dry the wet raw materials while grinding, so as to achieve effective grinding of the wet raw materials (Bao Yonggang. Application of Roller Mill in Raw Meal Grinding. Shandong B...

AI Technical Summary

Problems solved by technology

[0003] In stone coal vanadium extraction sites, besides vertical mills are used to grind stone coal raw materials, there are generally combustion furnaces for decarburization or roasting of stone coal. Utilizes heat energy from hot exhaust gases

In addition, the fine-grained products produced by the vertical mill itself are difficult to effectively recycle, and cannot meet the requirements of enterprises to reduce costs and increase efficiency

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