We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

Check Writers' Offers

What's Your Topic?

Hire a Professional Writer Now

The input space is limited by 250 symbols

What's Your Deadline?

Choose 3 Hours or More.
2/4 steps

How Many Pages?

3/4 steps

Sign Up and Get Writers' Offers

"You must agree to out terms of services and privacy policy"
Get Offer

The Flotation Process

Paper type: Essay
Pages: 2 (356 words)
Categories: Chemistry, Industry
Downloads: 20
Views: 3

A collector is the heart of the flotation process (Wills and Napier-Munn, 2006). Its purpose is to selectively produce a hydrophobic layer on the surface of the valuable minerals without adsorbing on the gangue materials in the slurry. The hydrophobized mineral particles to attach to air bubbles, which can be recovered in the froth product.

The important characteristics of a good collector include the ability to selectively adsorb onto desired mineral surfaces and to lower the water/mineral surface energy. The general composition of a conventional molecular collector is a hydrocarbon chain with a reactive or functional head group.

The head group reacts with the surface of mineral and the hydrocarbon group chain is oriented away from the surface towards the aqueous environment (Bulatovic, 2007). Xanthates for example, are the most common type of collectors used for sulfide minerals.

The invention of xanthate as flotation collector in 1925 was a significant development for froth flotation (Keller, 1925). Xanthates are known as low-cost, easy-to-produce collectors which usually give good flotation efficiency, which has allowed for their application for almost a century.

In order to obtain a good flotation efficiency, a collector needs to adsorb optimally on the mineral surfaces which can be achieved either by chemisorption or physical adsorption (e.g., electrostatic interaction). Adsorption of xanthates on a sulphide mineral is an example of chemisorption, whereas adsorption of cationic amine-based collector onto negatively-charged kaolinite is an example of physical adsorption (Hu et al., 2005).

There have been many studies discussing chemical aspects of the adsorption of xanthate collectors on the mineral surface (Hodgson and Agar, 1989; Andreev and Barzev, 2003; Hu et al., 2005; Grano et al., 1997; Vucinic et al., 2006). For example, through electrochemical investigations, Hodgson and Agar proposed that xanthate chemisorption at the nickel sites of pentlandite was because of oxidization that took place at the surface of pentlandite to form a dixanthogen (Hodgson and Agar, 1989).

Similarly, Andreev et al.’s studies via Raman spectroscopy of chalcopyrite-xanthate flotation products confirmed the formation of a diethyldixanthogen (Andreev and Barzev, 2003; Yang, 2011). The schematic drawings shown in Figure 3 illustrate their proposed dixanthogen formation on mineral surfaces.

Cite this essay

The Flotation Process. (2019, Nov 30). Retrieved from https://studymoose.com/the-flotation-process-essay

How to Avoid Plagiarism
  • Use multiple resourses when assembling your essay
  • Use Plagiarism Checker to double check your essay
  • Get help from professional writers when not sure you can do it yourself
  • Do not copy and paste free to download essays
Get plagiarism free essay

Not Finding What You Need?

Search for essay samples now


Your Answer is very helpful for Us
Thank you a lot!