the 1970s. Cyanide, in the form of a dilute sodium cyanide solution, is used to dissolve and separate gold from ore . This process was first used in large scale commercial mining in 1889 [3, 4]. Cyanide leaching is safer and more efficient than mercury amalgamation, which was previously the main method of recovering gold from ore .
If you want to learn about our products , please call or write mail consultation.
Our products sell well all over the world, and have advanced technology in the field of crushing sand grinding powder.
Great energy conservation, wide adjustment range, low noise and little dust
1.5 times or even 2 times larger crushing cavity than that of other crushers, large feeding mouth
With features of reliable structure, high working efficiency and easy adjustment
VSI sand maker, also called VSI crusher, is the major machine for sand making plant.
Ball mill is the key machine to grind the crushed materials. Ball mill machine is widely used to process cement, silicate product, building material, refractory material, fertilizer, ceramics and glass, etc.
On the basis of domestic mills, fote raymond mill is produced. The raymond roller mill enjoys the features of high working efficiency, low energy consumption, small floor space and small cost.