During this period of evolution, man struggled with the only fuel he knew – charcoal. Some 5600 years passed before any attempt was made to
In order to filter small amounts of fine slimy solids the reversible cake filtration process was developed. The filterable solids concentration in feeds can range
In deep strip mines the job of moving overburden may be so much bigger and more costly than the removal of coal or ore that
One of the major problems in the purchase and sale of coal shipped in lake or ocean going vessels has always been, the difficulty in
Undercut-and-fill- mining is a method developed by the International Nickel Company to deal with abnormal-pillar mining conditions at one of its mines. Results have been
The operation of a series wash thickener-two stage filtration circuit determines the soluble loss in many hydrometallurgical operations. A study of this circuit yielded expressions
Compared to the uranium ores in Colorado Plateau and New Mexico, the uranium-bearing lignites in North and South Dakota are relatively difficult to process. This
Comminution efficiency can be expressed in three different ways. Theoretical Efficiency: actual energy consumed, in a comminution machine compared to the theoretical energy required to
The feed size cannot be neglected in any case where the effective size modulus of the feed is not too much coarser than the size
A method and equipment have been developed for measuring the impact strength of grains of brittle materials. It is shown that brittle materials develop a characteristic