Valley Crushing and Screening is your single source for rock crushing, screening, material processing, conveying and wash plant solutions-portable, modular, and static. We represent the best brands in the industry – Cedar Rapids, Canica, Simplicity, Eagle Iron Works, and Gator Machinery. We service Washington, Oregon, Idaho, and Montana with.There are three main steps in designing a good crushing plant process design, equipment selection, and layout. The paper analyses all of these steps . Keywords . Gold mining, crushing, Zimbabwe, jaw crusher, cone crusher . 1.0 Introduction . Gold mining is the process of mining gold ores from the ground up till the stage where pure gold is.