Wyniki wyszukiwania - Biblioteka Nauki

1

Beneficiation of Egyptian Abu-Swayel copper ore by flotation

100%

Saleh A.-H. M. , Ramadan A. M. , Moharam M. R.

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tom Vol. 42

119-130

EN

In this study, an attempt was made to recover copper from Abu-Swayel deposit. A reverse flotation technique was applied leading to flotation of the accompanying oxide and sulfide minerals and gathering copper oxide minerals in the sink product. The results showed that the application of such technique is possible under the optimum flotation conditions. Studying the main factors that affect such flotation system indicated that the optimum flotation conditions are at 1.5 kg/t oleic acid as the collector, pH=10, air flow rate=7 1/min and 5 min flotation time. In the context, about 90% of copper recovery with 10% copper grade was obtained. It was also found that the copper mineral particles lost in the froth product by mechanical carryover mechanism can be recovered through concentrate cleaning under the same flotation conditions. Hence, one may conclude that the results of this study are useful and may help in reassessment of exploitation of such copper deposit.

PL

W pracy podjęto próbę odzysku miedzi z egipskiego złoSa Abu-Swayel. Zastosowano flotację odwrotną polegającą na flotacji towarzyszących tlenków i siarczków, gromadząc minerały tlenkowe miedzi w produkcie tonącym. Stwierdzono, Se technika ta jest uSyteczna, ale w warunkach optymalnych. Badania głównych czynników wpływających na stosowany układ flotacyjny wskazują, Se optymalne warunki flotacji to 1.5 kg/Mg kwasu oleinowego jako kolektora, pH=10, przepływ powietrza 7 dm3/min a czas flotacji to 5 minut. W tych warunkach otrzymano 10% koncentraty miedziowe przy uzysku około 90%. Stwierdzono takSe, iS ziarna minerałów miedzi stracone w produkcie pianowym są wynoszone mechanicznie i mogą być odzyskiwane przez czyszczenie koncentratu w tych samych warunkach flotacji. MoSna zatem powiedzieć, Se wyniki tych badań są pozytywne i mogą pomóc przy ponownej ocenie moSliwości eksploatacji złóS miedziowych tego typu.

2

An attempt to improve mechanical properties of brick produced from El-Maghara coal washing plant waste

100%

Ramadan A. M. , Saleh A. M. , Taha T. A. , Moharam M. R.

Physicochemical Problems of Mineral Processing

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2001

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tom Vol. 35

153-160

EN

Treatment of wastes became a vital demand to maintain the environment as clean as possible . The treatment of wastes and reuse of their constituents in industry will be helpful for this trend as well as for economy. Flotation technique is one of the important separation techniques that can be applied for treatment of wastes efficiently. The filter cake of El-Maghara coal washing plant was one of these wastes which contains a considerable amount of clay. This filter cake was treated in a previous work by flotation in order to clean it from the contained fine coal. The residual clay was tested as a raw material to produce brick models with acceptable mechanical properties. Improvement of the mechanical properties of such brick models by mixing such clay with sand is exactly the main objective of this work. The effect of different factors such as, weight percent of sand and its particle size on the mechanical properties of the brick models was investigated. It was found that 20 % and 60 % of sand sample characterized by size distribution of - 1500 + 0 žm and - 500 + 0 žm respectively are enough to achieve a considerable extent of improvement in the mechanical properties of the clay brick produced.

PL

Poprawa mechanicznych właściwości cegieł wykonanych z mułu węglowego przez dodanie piasku, stanowiła główny cel badań. Wpływ takich parametrów jak zawartość piasku, skład ziarnowy na właściwości mechaniczne produkowanych cegieł był badany. Zostało ustalone, że obecność 20% piasku o uziarnieniu –1500 žm oraz 60% piasku o uziarnieniu –500 žm pozwala na wyraźną poprawę mechanicznych właściwości produkowanych cegieł.

3

A combined hydrocyclone - electrocoagulation treatment for different types of industrial wastewater

88%

Farghaly M. G. , Attia H. , Saleh H. A. , Ramadan A. M. , Abdel Khalek M. A.

Physicochemical Problems of Mineral Processing

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2021

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tom Vol. 57, iss. 2

143--155

EN

Every year, a large amount of mineral processing wastewater is discharged from various industries into the environment which is considered a challenging task not only because of its large volume, but more importantly, its hazardous components, while its reuse as feedwater without proper treatments causes great harm to the final product of these industries. Cost-effective methods are required to treat a wide range of industrial wastewater in a diverse range of conditions. In this study, a combined hydrocyclone-electrocoagulation system is tried to treat the wastewater for industries with high water consumption and high pollutants such as paper industry, iron and metal forming industry, and marble industry. The effects of the hydrocyclone operational parameters, such as feed inlet pressure and diameter, vortex finder diameter, apex diameter, and feed solids content, were investigated. In the case, wastewater of paper industry, the following optimum conditions (P = 4.5 bar, !" = 15.8 mm, !# = 6 mm, !$ = 4 mm and %& = 2.3%) were achieved. An overflow of about 90.58% water recovery and 21.45% solid at 75.92% separation efficiency was obtained. The results showed that the hydrocycloneelectrocoagulation treatment has efficiently treated the three different types of industrial wastewater. The chemical oxygen demand (COD), biochemical oxygen demand (BOD), total solid (TS), total suspended solids (TSS), colour and turbidity, were reduced sharply and met the effluent discharge or reuse standards. Also, compared with the hydrocyclone-treated wastewater, the hydrocyloneelectrocoagulationtreated wastewater was found to be more enhanced.