engineering tables

Typical Ball Mill Charge Levels

Here is a table that approximates how much steel charge, or how many tonnes to steel balls are needed to obtain a given type of grind in a specific size mill. The table assumes you are running the mill at 50% charge.

BTU Energy Required to Dry Ores and Concentrates

To Drive off Moisture (theoretical) per Ton (2,000 lbs.) of Dry Material. Total B.T.U. include 63,840 B.T.U. to raise temperature of material from 60° F. to 212° F. at which point evaporation takes place (at sea level); specific beat of material taken as 0.21. Coal assumed to have 12,000 B.T.U. per’lb. as used and is … Read more

Calculate the Capacity of an Agitator & Conditioner

Example 1) It is desired to give 48 hours of contact on 100 tons per 24 hours of 2.7 specific gravity ore in a pulp of 40% solids (1:1.5). What size agitators will be needed? Total volume equals 59.85 –> from our Pulp Density tables. Tons feed equal 100. 59.85 time 100 equals 5,985 cu. ft. (total … Read more