Without any doubt froth flotation is still one of the most important processes for concentration gold bearing minerals including free gold, auriferous pyrite, auriferous pyrite or base metal sulphides associated with precious metals. During its long reign, the flotation process has passed through several stages of evolution and has obtained progress in economy, efficiency and simplicity of operation. Basically, much of today’s success in the flotation of low grade gold ores can be considered to that improvement. It has been noted that nowadays, instead of ten gold flotation plants with capacities exceeding 5,000 t/d capacity, there more than 30 and the gold flotation plants with less than 500 t/d capacity are becoming extinct. Also, this consideration is applicable to copper, copper-zinc, lead-zinc and copper-lead-zinc flotation plants.
Essentially, technological improvements to match the challenge of lower grade gold ores have taken the wholly predictable way toward bigger flotation plants and this aspect is applicable to the mine. It means that shovels, draglines, scrapers and trucks have led to the way. In gold ore processing it has been noted a rapid increase in size of grinding mills, flotation cells, pumps and cyanidation plants when the process includes both processes, flotation and leaching. For example, the 6-ft-diam ball mills treating 600 t/d at some gold operations in Canada, Australia, Mexico and Peru were considered giants, but today some grinding mills in similar service have more capacity
Some factors now accelerating the trend to larger gold concentrators and larger equipment are important to consider during the engineering design and the viability of the project. For example, after almost 60 years of stability with unit sizes less than 2 m3 flotation-cell units are now operating and a 100 m3 or more volume flotation cells is being built. Now, the design of these cells is considered as in the design and operation of flotation circuits against the background of the need to obtain greater process efficiency while holding down operating and investment costs. Particular attention has been paid to the scale-up problem. In this way, while the modern flotation cells having several times unit capacities, the advantages resulting from this in sampling, plant operation, control, testing and plant layout are aspects considered in the expansion or design of new flotation circuits. For this reason is important that the metallurgist and designers understand the principles that affect flotation machine design and the conditions needed to obtain better results from cells of greater volume. The, the flotation circuit design and operating considerations play an important role in the metallurgical performance of the flotation plant.
Mechanical Flotation Cells
Flotation Cell and Bubble Attachment | Hydrodynamic of Flotation Cells | Flotation Cell Functions | Large Flotation Cells | Selection of the Right Flotation Cell | Selection of the Flotation Cell Size | Selection of the Flotation Cell for the Cleaner Section | Level Control of Flotation Cell | Capacity of Flotation Cell | Influence of Flotation Cell on Gold Recovey | The Air Flow Number and the Flotation Cell | Scale-Up of Flotation Cells |