What are the common flotation reagent used in flotation technique?
What are the common flotation reagent used in flotation technique?
Common Types of pH Regulators The common regulators are lime, soda ash, and sodium silicate for alkaline circuits, and sulphuric acid for acid circuits. Many other reagents are used for this important function.
How do you calculate flotation recovery?
This can be calculated using weights and assays, as (Cc)/(Ff)·100. Or, since C/F = (f – t)/(c – t), the % Metal Recovery can be calculated from assays alone using 100(c/f)(f – t)/(c – t).
What is meant by flotation cost?
Flotation costs are costs a company incurs when it issues new stock. Flotation costs make new equity cost more than existing equity. Analysts argue that flotation costs are a one-time expense that should be adjusted out of future cash flows in order to not overstate the cost of capital forever.
How is sulphide ore concentrated?
Sulphide ores are concentrated by froth flotation process because pine oil selectively wets the sulphide ore and hence brings it to the froth.
How are sulphide ores purified?
Froth flotation process starts with increasing the surface area of ore. Firstly, the ores are crushed into fine powder and mixed with water. This mixture is called a slurry. Now surfactant chemical is added to it to enhance the hydrophobic nature of minerals.
What is ore flotation?
flotation, in mineral processing, method used to separate and concentrate ores by altering their surfaces to a hydrophobic or hydrophilic condition—that is, the surfaces are either repelled or attracted by water. Flotation has now become the most widely used process for extracting many minerals from their ores.
How is recovery value calculated?
Calculating Recovery Rate Once a target group is identified, add up how much money was extended to it over the given time period and then add up the total sum paid back by that group. Next, divide the total payment amount by the total amount of debt. The result is the recovery rate.
How do you calculate recovery?
Percent recovery = amount of substance you actually collected / amount of substance you were supposed to collect, as a percent. Let’s say you had 10.0g of impure material and after recrystallization you collected 7.0 g of dry pure material. Then your percent recovery is 70% (7/10 x 100).
How is flotation cost calculated?
The difference between the cost of existing equity and the cost of new equity is the flotation cost. The flotation cost is expressed as a percentage of the issue price and is incorporated into the price of new shares as a reduction.
How much promoter is needed for flotation of fatty acids?
Flotation of metallic oxides and non-metallic minerals usually require larger quantities of promoter, and in the case of fatty acids the range is from 0.5 to 2.5 lbs. per ton.
Which is the best flotation reagent for mineral processing?
Common Type of Flotation Depressants. Lime, sodium sulphite, cyanide, and dichromate are among the best known common depressants. Among organic depressants, starch and glue find widest application. If added in sufficient quantity starch will often depress all the minerals present in an ore pulp.
How are sulphide and gangue treated in bulk flotation?
In bulk flotation all of the sulphide minerals are collected and floated off together while the gangue remains unaffected and is rejected as tailing. Non- selective promoters serve very well for this purpose.
How much sulphidizing reagent do I need for flotation circuit?
Sulphidizers are usually fed into the conditioner just ahead of the flotation circuit. The quantity required varies with the characteristics of the ore and may range from .5 to 5 lbs. per ton. Conditioning time should be carefully determined and an excess of sulphidizing reagent avoided.
