The effects on selective flotation of fine1–16 μmpyrochlore of two types of water used at the Niobec concentrator, potable and plant recycle, were assessed. Several pyrochlore collectors and sili e depressants were tested. Water effects were different for each mineral-reagent scombination.
In some cases, biotic water constituents may bring positive effects on flotation efficiency. Two types of biotic water constituents can exemplify the positive effects: residue reagents and bacteria. Residue reagents brought to flotation circuits through water external reuse allows retention of some reagents and therefore lowers reagent consumption.
This has led to significant amount of research initiatives dealing with the impact of water re-use and water quality on flotation. Summaries of the findings have been published by Rao and Finch, 1989 , Johnson, 2003 , Liu et al., 2013 .
In this study, the selective flotation of fine particles from a nickel ore deposit and a secondary copper ore deposit is studied in both fresh water, and bore water having high ionic strength.
The effect of water quality on the flotation of a complex polymetallic sulphide ore was studied using a Doehlert-based experimental design. Flotation tests were carried out using a sulphide ore provided by the Guemassa-Marrakech mining company, MoroccoMCG , using simulated tailings dam water. The optimal results, with a galena recovery of 86% and selectivity, relative to chalcopyrite ...
To determine the water recovery rate, a froth flotation experiment was performed using the same abovementioned flotation cell. The experimental conditions were as follows: 6.7 g/L of emulsified kerosene, an aeration rate of 0.25 L/h, and a rotational speed of 1900 rpm.
The addition of ferrous sulfate as a depressant for Ca-bearing minerals such as calcite and fluorite during scheelite flotation was investigated to recover scheelite from tungsten mine tailings, using Hallimond-tube flotation tests, zeta-potential measurement and Fourier-transform infraredFT-IRanalyses. The flotation tests indi e that the selectivity of scheelite recovery was the largest ...
types of oxidized taconites3 from the Lake Superior district to improve the dispersion-selective flocculation-desprm process for beneficiat ing these materials. The response-surface contours of the effects of dissolved ionic species in the water and of three dispersion systems on the selective flocculation process were studied.
Water in flotation circuits is used for transporting solids and is a critical part in the processing of minerals4 , therefore, understanding its effects on flotation is critical. However, mill personnel do not often have sufficient understanding of the effects of recycled water on flotation and do not have the time and resources to carry out ...
The impact of water quality on flotation performance by G. Levay*, R.St.C. Smartand W.M. SkinnerSynopsis Water represents 80–85% of the volume of mineral pulp processed in flotation circuits. Imperatives for a more detailed focus on circuit water quality and its control have come from increasing
The use of recycled water in flotation has significant effects on flotation and selectivity because the recycled water contains many dissolved compounds and ions that alter the chemistry of the ...
Since human daily demands for fresh water have been increased significantly, the supply of fresh water for the mining industry, especially froth flotation, should be considerably reduced. In addition, stricter environmental standards have been implemented in many countries to reduce the risks due to the disposal of wastewater, many flotation operators have to seek more efficient ways to ...
In selective flotation experiments, water bottles and waste water pipes were used for this purpose, and Triton XL-100 N and diethylene glycol dibenzoate were used as plasticizers.
Two rougher flotation test series were conducted in synthetic seawater and tap water. In the first phase, the effect of using seawater as process water was investigated by using different type of collectors. The object of the second phase was to conduct flotation tests in synthetic seawater and tap water with varying dosages
achieving an optimum flotation test condition, the effect of auxiliary collector types and pH were evaluated on the flotation of galena, pyrite and sphalerite. 2. Materials and Methods 2.1. Characteristics of pyrite-rich lead-zinc sample A representative pyrite-rich lead-zinc sample was obtained from the
Supergene nickel sulphide ore mined currently by Agnew Mining Company is at times partially oxidised to sulphate. The resulting soluble nickel, and calcium and magnesium in mill water, are shown to act as depressants in flotation. The depressant effect is favourably selective in that violarite, the main nickel mineral, is less affected than pyrrhotite. Nickel...
Particle size encountered in flotation10-200 mu mshowed no significant effect on contact angle but has a strong effect on flotation rate constant. There is a lack of a rigid quantitative correlation between factors affecting wetting wetting behaviour and contact angle on minerals and hence their impli ion for flotation process.
flotation selectivity with some effect, but depress witherite to a large extent at the same time. Therefore, there is a considerable demand for developing more selective depressants with high performance for the separation of witherite from calcite. Potassium chromate has been widely used as a depressant for gelena in flotation.
In the present investigation, two coal samples were obtained from a typical Australian coal flotation plant using saline water and examined to identify surface chemistry effects on fine coal flotation which is an important issue confronting the coal industry.
Laskowski1981who found lack of flotation of synthetic millerite and other nickel minerals with DMG and other dioximes. It should be noted here that DMG forms water-soluble copper chelate. Usoni et at1971showed that a hydrocarbon oil was necessary to obtain acceptable flotation of niccolite with DMG.
The pulp and froth zones are the main components of froth flotation as it defines both quality of the end product and overall efficiency. The importance of the properties of the two zones, which include pulp hydrodynamics, froth bubble coalescence rate, water overflow rate, air recovery, etc., is being increasingly recognized.
Effects of pre-flotation pulp conditioning time variations In this experimentExp. 3 in Table 3, the influence of pulp conditioning time on flotation yield was analysed. Flotations were implemented for five different time conditions, with all the other parameters held constant.
But, by lowering the air/water surface tension in the saturator, DAF was possible at 2 atm saturation pressures. This behavior was found to occur in batch and pilot DAF operation tests. Dissolved air flotation takes advantage of the effect of pressure on the solubility of gases in liquids.
14.20 Effect of mineralogy on the selective flotation of enargitePart IM. Tayebi-Khorami, E. ManlapigJKMRC, Australia , E. Forbes and G. HeyesCSIRO Process Science and Engineering, Australia14.40 Oxidative weathering of a copper sulphide ore and its influence on pulp chemistry and flotation