Any chemical that is added to a system or a mixture to consume, or to convert to an inactive form, small quantities of impurities or undesired materials. Ref: CCD, 2. ii. In flotation, a rougher cell in which the tailings, before being rejected as waste, are subjected to a scavenging flotation treatment.
What is a scavenger in mineral processing?
The minerals that do not float into the froth are referred to as the flotation tailings or flotation tails. These tailings may also be subjected to further stages of flotation to recover the valuable particles that did not float the first time. This is known as scavenging.
What is meant by froth flotation?
Definition of froth flotation
: flotation in which air bubbles are introduced into a mixture of finely divided ore or other material with water and a chemical that aids attachment of the bubbles to the particles of the desired material and its recovery as a froth.
What is flotation process in mining?
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.
What is flotation cleaner?
Most flotation circuits include an initial stage of rougher flotation, followed by a scavenger stage of flotation.Cleaner flotation tailings is an intermediate product and is recycled within the flotation circuit. Many ores contain multiple valuable minerals that can be floated into separate concentrates.
What is flotation example?
Flotation is defined as the phenomenon that is related to the relative buoyancy of the objects. An example of flotation is when the dry leaves fall on the surface of the river, they float.
What is a scavenger concentrate?
In flotation, a rougher cell in which the tailings, before being rejected as waste, are subjected to a scavenging flotation treatment. Concentrating tables are also used as scavenger machines.
What is froth flotation 12?
Principle: The principle of froth floatation is that sulphide ores are preferentially wetted by pine oil, whereas the gangue particles are wetted by water. Collectors are added to enhance the non-wettability of the mineral particles.
How is froth flotation done?
Froth flotation is a physicochemical process that separates particles based on differences in surface wettability. Flotation takes place by passing finely dispersed air bubbles through an aqueous suspension of particles (Fig. 17).
What is flotation science?
Flotation is a term used in physical science to describe when something is suspended at the top of a liquid, like a wooden canoe on water.
What are the types of flotation?
There are three types of flotation: natural, aided and induced flotation. Valid if the difference in density is naturally sufficient for separation. Occurs when external means are used to promote the separation of particles that are naturally floatable.
What happens during flotation?
The water in a sensory deprivation tank is heated to skin temperature and nearly saturated with Epsom salt (magnesium sulfate), providing buoyancy so you float more easily. You enter the tank nude and are cut off from all outside stimulation, including sound, sight, and gravity when the tank’s lid or door is closed.
How does floatation process work?
The flotation process involves crushing the ore to liberate separate grains of the various valuable minerals and gangue components, pulping the ore particles with water, and then selectively rendering hydrophobic the surface of the mineral of interest.
What are the common flotation reagent used in flotation technique?
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.
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.
What does flotation mean in business?
Stock market flotation is money raised when a business becomes a PLC (public limited company) by offering shares to the public to buy.
What are the 3 types of buoyancy?
There are three types of buoyancy:
- ✴Neutral Buoyancy- The object is neither sinking nor floating…
- ✴Positive Buoyancy- The object is floating at the top of the surface…
- ✴Negative Buoyancy- The object is sitting at the bottom of the body of water…
What is the difference between flotation and flotation?
While both terms describe similar phenomena, “flotation” encompasses more solid surfaces than “floatation.” Without the extra letter, “flotation” can be used to describe the ability of a surface, such as snow or mud, to hold weight.
Why flotation is used for fine particles only?
Understanding the limits of fine particle flotation is the key to the selective separation of fine mineral particles. Fine particles have low collision efficiencies with gas bubbles and float slowly.
What is froth flotation Class 10?
The Froth Floatation method is a method used for the concentration of metal ores. It is used for the concentration of sulphide ores. In this method, water is added to powdered ore. To this, substances called collectors (such as pine oil ) are added so that the ore particles can be separated from the gangue particles.
How do froth stabilizers work?
Complete Step By Step Answer:
The ore is preferentially wetted by the oil whereas the impurities are wetted by the water. The froth will take the ore with it and rise. This is then skimmed off. Froth stabilizers are substances which help stabilise the froth formed during the froth floatation process.
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