Bias is defined as a downward flow of liquid through the froth zone. Positive or downward bias is usually used when two suspended substances must be separated from each other. If multiple separation stages are in operation, it is usually used on the last stage. The downward flow of water through the froth is controlled by varying the water rate added to the froth zone. This flow may be monitored by temperature, conductance or by flow differences (water added to froth minus overflow water, or amount of liquid in underflow minus its amount in feed). The actual bias needed depends on the distribution of the water through the froth and the hydrophilic particle sizes.

Bias may be estimated using the difference in slurry flows (Figure 3) or, more accurately, by first calculating the liquid volumetric flows using flow and density meters.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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