Onoda Cement Co., Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Sankyo Dengyo Co. Ltd.

Kohe Steel, Ltd.

Hiroshi Obana

Eiichi Onuma

Takemi Aizawa

Tsutomu Itoh

Takeshi Furukawa

Hiroshi Saitoh

Masaki Hamaguchi

Haruo Tateno

Masayuki Kitoh

Katuhiko Shimojima

Hiroyuki Murata

Youji Kawamura

Katsuhiko Shimojima

Hiroyuki Ninomiya

Takaaki Misaka

Toshiyuki Tanaka

Kyosuke Fukuyama

Motomi Tamai

Tsuguya Inagaki

Minoru Tokita

Masanori Yoshikawa

An arc is formed between a pair of discharge electrodes, a plasma gas separated from a raw material gas flowing substantially in parallel to the arc to form a plasma flame, the raw material gas flowing to the upstream within the plasma flame, and a diamond being deposited on the substrate downstream within the flame.

Method for making diamond and apparatus therefor

Apparatus for controlling the operation of a grinding system having a plurality of mills running in a parallel fashion, in which the operating condition of each mill is controlled such that a predetermined physical quantity, which changes dependent on the running condition, is equal to set values for the mills, and the set value for each mill is variably controlled so as to maximize the amount of pulverized material. The apparatus includes means for comparing a pulverizing amount F.sub.A per unit time of the mill under control with that F.sub.B of another mill, and controlling the set value for the mill under control so that a difference between the pulverizing amounts (F.sub.A -F.sub.B) is maximized while the set value for the other mill is fixed, whereby the set value of the mill under control is automatically optimized.

Apparatus for controlling the operation of a grinding system

Roller mill

A vertical mill for material such as cement raw materials, clinker, coal, or the like comprises a grinder portion which has rollers arranged to grind the material by their rolling on a rotary table, a separator means which is positioned above the grinder portion and which classifies the ground material conveyed pneumatically from the grinder portion to the separator means by the two opposite forces of centrifugal force of a rotary disk and of fluid resistance of a vortex flow, a plurality of straightening vanes which are mounted between the casing and the inner cone and which adequately regulate the direction of the fluid in the lower portion and in the upper portion in passage between the grinding portion and the separator means, and a casing outside the separator means having the appropriate shape for forming a horizontal vortex flow in the separator means. The aforesaid vertical mill structure improves the classifying efficiency of the separator means.

Vertical mill

Growing community of inventors

Narashino, Japan

Hiroshi Obana