Tetrahedrons and Spherical Balls Compared: An interested operator furnished 1,000 pounds of tetrahedrons for comparison with spherical balls. The tetrahedrons were all about the same size

A stock of 300 pounds of 1 5/8-inch sillimanite balls was donated by the Champion Spark Plug Co. for grinding tests. They were true spheres,

Selection of Volume of Ball Loads in Continuous Dry Open Circuit Grinding: The tests reported in tables 19 and 20 were made in cooperation with a

The study of grinding is a study of cause and effect. The pre-ponderance of the literature is on the latter—effect. It seems that the study

In table 3 of a recent publication a report was made on the use of pipes (instead of rods) stuffed with different materials to give

Batch Mill Grinding of Ore Batch grinding affords the best opportunity for first studies of pulp consistency. Table 6 shows some of the results. The consistencies

In a study of rod-mill discharge openings of different sizes, four pairs of tests were made at speeds of 40, 50, 60, and 70 percent

When the mill is rotated without feed or with very fine feed, the rods are in parallel alignment and in contact with one another for

Batch Ball Mill Grinding Capacities and efficiencies in wet and dry ball milling at different speeds and ore charges have been discussed in the foregoing

Chert, which is very hard, and dolomite, which is moderately hard, were selected for use in a study of the effect of different speeds and