Three-stage screening and scraping device applicable to external-circulation vertical mill
An external circulation, vertical mill technology, applied in grain processing and other directions, can solve the problems of increasing the power consumption of the grinding system, large installed power, etc., and achieve the effect of reducing the amount of lifting materials and reducing the installed power.
Pending Publication Date: 2018-12-04
NANJING KISEN INT ENG
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Problems solved by technology
[0002] At present, the external circulation vertical mill used for grinding powdery materials in China generally adopts a single-stage scraping device to discharge all the powdery materials after grinding by the vertical mill, and then sends them to the material screening device (such as Separator), the lifting device needs to be equipped with a larger installed power, which increases the power consumption of the grinding system
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[0014] The following will clearly and completely describe the prior art and the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0015] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0016] refer to figure 1 and figure 2 , the preferred embodiment of the present invention provides a three-stage screening and scraping device suitable for external circulation vertical mills, including a vertical mill shell 1 and a grinding disc 2, and the space between th...
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The invention provides a three-stage screening and scraping device applicable to an external-circulation vertical mill. According to the invention, the space between a vertical mill shell and a millstone is set as a blanking space; the interior of the blanking space is successively provided with a first-stage sieve and a second-stage sieve from top to bottom; the first-stage sieve and the second-stage sieve divide the blanking space into a first-stage blanking space, a second-stage blanking space and a third-stage blanking space successively arranged from top to bottom; scraping plates fixedlyconnected with the millstone are respectively arranged in the first-stage blanking space, the second-stage blanking space and the third-stage blanking space; and the vertical mill shell is further provided with a coarse power blanking opening, a medium-coarse power blanking opening and a fine power blanking opening respectively communicating with the first-stage blanking space, the second-stage blanking space and the third-stage blanking space. The three-stage screening and scraping device of the invention reduces the amount of materials to be lifted and the processing amount of screening devices, so the installed power of lifting devices and the screening devices is reduced, and the installed power of fans needed by the screening devices is indirectly reduced; and thus, the purposes of energy conservation and consumption reduction are achieved.
Description
technical field [0001] The invention relates to the technical field of external circulation vertical mills of cement or cement raw meal production lines, in particular to a three-stage screening and scraping device suitable for external circulation vertical mills. Background technique [0002] At present, the external circulation vertical mill used for grinding powdery materials in China generally adopts a single-stage scraping device to discharge all the powdery materials after grinding by the vertical mill, and then sends them to the material screening device (such as Separator), the lifting device needs to be equipped with a larger installed power, which increases the power consumption of the grinding system. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the present invention provides a three-stage screening and scraping device suitable for external circulation vertical mills, which reduces the amount of lifting materials, th...
Claims
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IPC IPC(8): B02C15/00B02C23/14
CPCB02C15/00B02C23/14
Inventor 李立华曹昌胜赵俊
Owner NANJING KISEN INT ENG