A preparation process of pyrophyllite micropowder with narrow diameter

Abstract

The invention discloses a preparation process of a pyrophyllite micro-powder with narrow diameter value. The preparation method includes the steps of ore detection, proportioning, ore crushing, broken stone grinding, micro-powder homogenization and the like; the preparation method comprises innovation points that in the ore detection and proportioning, control of the water content of an ore is added, and the content of the ore water is maintained at 0.20-0.70% by mass; in the broken stone grinding, the grinding plate rotational speed of a grinding mill and the dust-collecting wind pressure of a main air blower are controlled through a control center, the grinding plate rotational speed is 1000 rpm-1300 rpm, and the dust-collecting wind pressure is 8000 Pa-10000 Pa. With use of the preparation process of the nano pyrophyllite micro-powder, a certain parameter control of the ore water content, the grinding plate rotational speed of the grinding mill and the dust-collecting wind pressure of the main air blower is carried out, the ratio of a micro-powder with the particle size of 325-1000 mesh in the micro-powder finished product is greatly improved, and the grade of the pyrophyllite micro-powder is greatly improved, so that the price of the pyrophyllite micro-powder is increased in geometrical progression.

Description

technical field [0001] The invention relates to a preparation process of pyrophyllite micro-powder, in particular to a preparation process of narrow-diameter pyrophyllite micro-powder which can make most of the micro-powder particle size distribution within the applicable range without losing economical efficiency. Background technique [0002] The existing pyrophyllite micro-powder production process usually includes: 1. Raw material detection: the raw materials in the crushed stone tower library are tested and tested, and the ingredients are mixed according to the formula ratio by using a batching scale, and then dropped on the transfer conveyor belt, and the end of the conveyor belt is connected to the elevator mouth , transported to the intermediate silo by the elevator; and a strong magnetic purification device is installed on the front side of the conveyor belt conveyor for iron removal. 2. Grinding: The ore in the middle silo is quantitatively and evenly added to the ...

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Problems solved by technology

[0003] In the process of wire drawing in the pool kiln, when the particle size of the micropowder is lower than 325 mesh, it is easy to have difficult to accommodate when melting the raw materials in the pool kiln, resulting in easy breakage during drawing and waste silk; when the particle size of the micropowder is higher than 1000 mesh, it is mainly produced Difficult, and the cost will increase, which is not convenient for market demand

The so-called narrow-diameter value means that when most of the particle size of the ground powder is distributed between 325-1000 mesh, it is both manufacturable and economical. However, the existing pyrophyllite micro-powder production process cannot effectively control the particle size of the micro-powder. The proportion of the particle size of the micropowder between 325-1000 mesh can only reach about 90%, resulting in a decline in the grade of the micropowder and low price

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