Paper looks at effect of pH on flotation of different sulphide mineralsDescripción completa
A chemistry investigatory project on the presence of oxalate ions in guava with all the required sample readings and observations, graphic customized and ready to print.( Though you will nee…Full description
Chemistry investigatory project
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Globalization in Philippines
CSEC Biology: Effect of Human activity on the Ecosystem, and How humans can reduce this negative effect.Full description
This study was undertaken to study the effects of cement dust in vegetation in Azadirachta indica and Mangifera indica . The different amounts of cement dust mixed with soil on the seed germination, plant growth, leaf area. The reason for this was th
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Globalization in Philippines
A look at the effect of altitude on relative humidity of atmosphere.
When wealthy young broker James Baxter is sent to the tropical country of Kupro Marbordo, the Copper Coast, he is amazed to find that slavery is a well established custom there. Initially sh…Full description
Tobacco smoke contains numerous compounds emitted as gases and condensed tar particles, many of them being oxidants and pro oxidants, capable of producing free radicals thus enhancing lipid per oxidation in biological membranes. Vitamin E, vitamin C,
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Effect of Pyramids on MicroorganismsFull description
Experiment to investigate the effect of temperature change on rate of respiration in yeast. The document includes background information, aim, variables, Hypothesis, equipment list, method, …Full description
It's a research report on the consumers perception and response towards an advertisement. It'll be my pleasure if it become useful to you.
Effect of antibiotics on bacteria practical writeup
Effect of the Moon in Various HOUSES
Concrete is one of the most important materials in the construction world. In the present scenario, due to the various industrialization, especially in the urban areas, the demand of construction work increases progressively. Due to which there is ve
The impact of crude oil on the permeability of the soil in a non oil producing community in Enugu State was investigated using disturbed A 6 CL soil sample collected from Ibagwa Nike area of the state. The sample was divided into five 5 portions and
Fig. 7. Pyrite recovery after regrinding as a function of collector dosage without additional copper ions. It is interesting to find that pyrite flotation could not be restored completel y after the regrinding even with stainless steel media minimizing the amount of iron o xidation products. It seems that the copper concentration or the activated pyrite surface carried from the rougher flotation concentrate may not be sufficient in relation to the increased surface area after regrinding. To further increase pyrite flotation, additional copp er ions may have to be added during regrinding to activate the new generated p yrite surface, which is discussed below.
3.4. Pyrite flotation with additional Cu2 + ions added during regrinding Pyrite flotation at the cleaner stage as a function of the dosage of CuSO4 · 5H2O added during regrinding is shown in Fig. 8. 640 g/t collector was added in the cleaner flotation. Interestingly, with the dosage of CuSO4 · 5H2O, pyrite flotation was increased with mild steel media, but decreased with stainless steel media. For example, pyrite recovery was increased from 29 to 50 wt.% with mild steel media but decreased from 60 to 42 wt.% with stainless steel media after the addition of CuSO4 · 5H2O. It was noted that froth in the flotation became coalescent when copper ions were added during regrinding with stainless steel media. Therefore, water recovery which is an indicator of froth stability as a function of the dosage of CuSO4 · 5H2O added during regrinding was obtained. As shown in Fig. 9, with the addition of copper ions, water recover y was decreased linearly with stainless steel media, but increased and then stabilized with mild steel media. Apparently, the addition of copper ions during regrinding decreased the froth stability with stainless steel media but increased the froth stability with mild steel media. In fact, a s imilar observation was found by Bradshaw et al. (2006) and Ekmekçi et al. (2006) who investigated the effect of different grinding media on the flotation of Merensky ores in the presence of copper sulfate. O'Connor et al. (1988) also found that copper sulfate reduced the maximum froth height in pyrite flotation. They proposed that hydrophobic Cu – xanthate colloids formed in the pulp, attached onto air bubbles and promoted coalescence of air bubbles.
