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The rotary jaw crusher; new industry tool.

Schmidt RL; Niemela R

International Symposium on Mine Mechanization & Automation 1991 Jan; 2:11-25 - 11-33

10011754

Over the past decade, the U.S. Bureau of Mines has been involved in the development of a hard-rock crusher with a unique design that is a total departure from current industry practice. This innovation was a product of the Bureau program to develop a portable crusher for underground hard-rock mines. The rotary jaw concept was developed under a Bureau research contract by the firm Rapidex, Inc., which created the design and built a quarter-scale working model for demonstration. The model was tested on sample batches of rock with a wide variety of physical properties and performed above expectations. Personnel with the firm mine support systems became interested in the rotary jaw concept and obtained a license from the government that enabled it to further develop the system and offer it to the mining industry. Through a cooperative agreement with the Bureau, mine support systems obtained the quarter-scale model to study the theoretical basis for the crusher's performance. Additional testing along with other technological developments led to an expanded definition of the crusher's capabilities and design improvements. This paper describes the rotary jaw concept and presents the results of testing conducted to date.

Mining-industry; Mining-equipment; Underground-mining; Engineering; Hard-rock-mines

19910101

OP; Conference/Symposia Proceedings

1991

OP 156-91

TCRC

International Symposium on Mine Mechanization & Automation

CO; MN