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Therefore, the choice of a process water treatment method for recycling is a decision that should be justified with ad hoc studies, because this affects the critical parameters of flotation and ...


DOI: 10.1007/s11631-008-0104-4 [3] J. Chen,K. Huang Y.R. Chen, the discussion of several treatment processes of the Jinbaoshan Platinum-palladium flotation concentrate, J. Rare metal. 3(2006)401-406 (In Chinese).


installed flotation cells. Anglo Platinum-managed operations currently treat over 4 million tons of ore per month through hundreds of flotation cells of varying capacities, and produce about 90 thousand tons of flotation concentrate. Examples of the wide variety of installed capacity of flotation units in Anglo platinum are given in Table I.


Research on the flotation behaviour of platinum group minerals (PGM) has mainly focused on the flotation of base metal sulphides because of their association with the PGMs and due to the assumption that the PGMs would respond similarly to such sulphides in their flotation behaviour. It has been reported, however, that significant losses of PGMs ...


where γ is the surface tension (mN m −1), F is the force (mN) measured by the sensor when the plate attaches the surface of the solution, L is the wetted length of the plate (mm), and θ is the contact angle (°). Surface tensions measurements were carried out in 100-mL glass vessels (Krüss SV20, 70 mm internal diameter) at room temperature, containing …


(A and C) Time to treatment failure (TTF) and (B and D) overall survival (OS) based on type of therapy administered (platinum based v other) in patients with (A and B) platinum-sensitive disease or (C and D) platinum-resistant or -refractory disease in the second line. (E) Time since last platinum dose in the first-line setting in the different ...


12%The paper considers the studies into the hydrophobic properties of platinum and platinum arsenide, sperrylite, in the solution with added complexing reagents by using the method of measuring the force of the air bubble abstraction from the mineral surface. The effect of these complexing reagents on the chemical properties of sperrylite and …


However, at elevated temperatures between 120 and 180 °C, PGMs can be leached by sodium cyanide like the reaction of gold. In this work, a new technique to treat Pt–Pd sulfide flotation concentrates and spent auto-catalysts by pressure cyanidation is put forward, and the results of 5 kg-scale batch experiments in a 50 L autoclave are ...


DOI: 10.1111/j.1540-8167.2011.02267.x Abstract Introduction: In order to optimize power delivery into the myocardium during radiofrequency ablation (RFA) without overheating the electrode tip, active cooling of the tip electrode as well as electrode tips made of gold have evolved.


Corresponding Author. Department of Gynaecologic Oncology, Saitama Medical University International Medical Centre Comprehensive Cancer Centre, Hidaka, and


Rustenburg Platinum Mines. The main advantage derived from the use of oxygen on the converters at Rustenburg is the greater flexibility it gives to the operation. The ability to use oxygen if desired makes it possible to schedule alternative methods, for the treatment of various feed-stock materials to suit prevailing circumstances.


Flotation tests were conducted using an agitator-type flotation machine (FT-1000, Heiko, Japan) equipped with a 400-mL flotation cell in which 20 g of washed sample, 10 g of quartz (99.9% SiO 2, Wako Pure Chemical Industries, Ltd., Osaka, Japan), and 400 mL DI water were added. The purpose of adding quartz is to measure the amounts of ...


The platinum-based drugs cisplatin, carboplatin and oxaliplatin are regularly prescribed in the treatment of cancer and while they are effective, their use is limited by their severe, dose-limiting side effects (also referred to as adverse effects/events). In total, a cancer patient can experience any combination of around 40 specific side effects.


X-ray Diffraction characterization of electrodes before and after electrochemical treatment, and after regeneration. a The XRD patterns of 100 nm platinum electrodes before (blue line) …


CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Summary.-Cis-dichlorobis(cyclopentylamine)platinum II (DBCP) belongs to the group of platinum complexes which have recently been reported to have anti-tumour activity. Its cytotoxic activity in CHO cells is not cell-age-dependent, but enhancement of the effect of ionizing radiation is both dose-and …


The South African platinum industry has advanced into an era of predominantly mining and processing Upper Group Two (UG-2) ore to extract Platinum Group Metals (PGMs). Flotation concentrates derived from processing UG-2 ore are typically characterized by high chrome contents (>3 wt.%) which are not amenable to conventional PGM smelters. The net …


Paclitaxel/docetaxel + platinum was more likely to be used, followed by gemcitabine + platinum. In second/third-line treatment, PBC yielded a similar response and survival compared to non-PBC. Adding PBC in the first-line therapy was better than that in the latter-line of treatment in terms of ORR, PFS and OS ( P < .001).


Treatment technologies such as conventional activated sludge, dissolved air floatation, lagoon and pond systems, coagulation and flocculation processes, and anaerobic digestion (AD) are frequently used for domestic wastewater treatment [3,4]. These technologies are also applied in the treatment of CSWW.


Data on the distribution of the precious metals (Au, Ag and the platinum=group elements Ru, Rh, Pd, Os, Ir, Pt) are rapidly accumulating as a consequence of the application of microbeam analytical techniques such as the electron microprobe, the proton microprobe, and …


The beneficiation of platinum group metals (PGMs) from pristine (unweathered) sulfide ores has conventionally been conducted through froth flotation, which typically achieves platinum recoveries ...


flotation of platinum-bearing Merensky ores by J.G. Wiese*, M. Becker*, D.J. Bradshaw*, and P.J. Harris* Synopsis Reagents are added to the flotation process of Merensky Reef ores to achieve specific functions that enable the separation of valuable minerals from gangue minerals on the basis of the difference in their surface properties.


The beneficiation of platinum group metals (PGMs) from pristine (unweathered) sulfide ores has conventionally been conducted through froth flotation, which typically achieves platinum recoveries ...


Recent studies have shown conflicting results regarding the effect of hydrogel coils for treating intracranial aneurysm compared to bare platinum coils. We implemented a meta-analysis to assess the value of hydrogel coils in intracranial aneurysm treatment. The MEDLINE, EMBASE, and Cochrane Library databases were searched for randomized controlled trials …


Platinum catalysts are reported for the direct, low-temperature, oxidative conversion of methane to a methanol derivative at greater than 70 percent one-pass yield based on methane. The catalysts are platinum complexes derived from the bidiazine ligand family that are stable, active, and selective for the oxidation of a carbon-hydrogen bond of ...


DOI:10.1016/j .mineng.2011.01.001 ... However in the present study it was observed that a similar treatment of Platinum-Group Minerals produced the poorest results and the highest grades and ...


Platinum- and paclitaxel-based chemotherapy are the most widely accepted standard of care for OC patients. However, they have long been known to cause systemic immunosuppressive effects due to ...


Existing processes for the recovery of platinum group metals (PGM) from UG-2 ores place stringent requirements with regard to chromite content (about 2.8 per cent) upon feed material to the plant. The conventional process sequence involves: smelting of a flotation concentrate to remove gangue material and to produce an iron-nickel-copper-PGM matte


Xanthates which float well with platinum group metals (PGE) are widely used as the main sulfide collector for the flotation of sulfide platinum-copper-nickel ore. If free forms of platinoids are found, DP-4 reagent (organic sulfur-containing additive) is additionally used at Norilsk Mining and Metallurgical Plant.


They then show that combined treatment of cisplatin and a PARP inhibitor reduces resistance to cisplatin in lung cancer cells. Decision letter after peer review: Thank you for submitting your article "Resistance to platinum chemotherapy in lung adenocarcinoma is driven by a non-genetic, cell-cycle dependent mechanism" for consideration by eLife ...


Electrochemical oxidation of some p-substituted phenols (p-nitrophenol, p-hydroxybenzaldehyde, phenol, p-cresol, and p-methoxyphenol) with electron-donating and -withdrawing substituents was studied to reveal the relationship between the structure and the electrochemical reactivity of p-substituted phenols using a boron-doped diamond electrode by voltammetry and bulk …


In this study, two black shale copper ores from different Mid-European Kupferschiefer-type deposits and their flotation concentrates were used for bioleaching tests. All samples were subjected to stirred tank bioleaching using an acidophilic, moderately thermophilic microbial consortium. The distribution of sulfides and gangue minerals in the ores, copper concentrates …


simplified the treatment, decreased the operating costs and improved the environmental conditions. Our investigations involved flotation concen-trates of low-sulfide platinum-bearing chrome ores from South Africa. The ore had the compositions shown in the Table. An X-ray microscopy study of the phase composition of the flotation concentrate


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PLATINUM METALS REVIEW

Treatment of Platinum Flotation Products 125 By A. V. Tatarnikov, I. Sokolskaya, Ya. M. Shneerson, A. Yu. Lapin and P. M. Goncharov Platinum/Carbon Nanotubes in PEMFCs 132 Optical Hydrogen Sensors Using Palladium-Silicon 132 fiPlatinum 2004fl 133 The Minting of Platinum Roubles: Part III 134 By David B. Willey and Allin S. Pratt


Request PDF | Transfer of Gold, Platinum and Non-Ferrous Metals from Matte to Slag by Flotation | One of the stages of extracting gold and platinum from sulfide materials and circulating slags is ...


ions at pH 8.9 [14]. The latter technique has been developed in continuous flotation columns or in other pilot or industrial devices for processing of UG2 ore in South Africa [5, 16 - 18] to remove the major chromite-containing part of the ore, in view to recovering platinum group elements. Guar gum was added as


platinum group metals recovery from concentrates by means of hydrometallurgical autoclave treatment. P. M. Goncharov is a Senior Staff Scientist at the Gipronickel Institute JS, St. Petersburg, Russia. He is involved in the treatment of ores and byproducts containing noble metals by means of hydrometallurgical autoclave treatment.


A flowsheet has been developed for the production of rich concentrates of precious and non-ferrous metals by a complex treatment of the flotation products from …


All patients had received prior pelvic irradiation. Eleven patients received combination chemotherapy with platinum, vinblastine and bleomycin (PVB), and 8 patients received a regimen of platinum and 5-fluorouracil (PF). Two patients achieved a complete response and 4 patients achieved a partial response, a total response rate of 33%.