タワーミルによる石灰石の微粉化
1986 年 102 巻 1176 号 p. 91-95
詳細
1986 年 102 巻 1176 号 p. 91-95
Most of the limestone produced is used as raw material for the cement, iron and steel industries, and various civil enginneering projects. Some of the limestone which is of very high grade could be more profitably used as paper filler than for the manufacture of cement. The present paper was thus focused on problems related to limestone pulverization for paper filler production.
(1) Limestone of high grade purity and whiteness was pulverized by the Tower Mill Pulverizer in a dry semi-continuous system.
(2) Tests were performed under various conditions in order to examine the characteristics of the pulverizing system.
(3) The increased number of revolutions of the blower mounted to the pulverizer for conveying the pulverized products increased the weight of the pulverized product while decreasing the weight percent of the-10μm particles in the product, and also increasing the weight of the -10μm products.
(4) While the increased number of revolutions of the blower caused an increase in the electricity consumption of the motor of the blower, it decreased that of the pulverizer. There was however an increase in the total consumption of both motors.
(5) The increased number of revolutions of the blower decreased the total electricity consumption per unit weight of the pulverized product and per unit weight of the -10μm product. The minimum values of the former and the latter were 0.070 and 0.641 kWh/kg, respectively.
