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Freshly abraded metal debris were magnetically attracted to pyrrhotite and lowered the rest potentials of the mineral particles thereby affecting the corrosive wear the investigation was extended to explore the interactions between a nonmagnetic sulfide mineral pyrite and abraded metal debris and their effects on the corrosive wear mechanism
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Although the exact mechanism of wear reduction is not known these studies conclude that corrosion must play a significant role in the wear of grinding media one of the explanations of this phenomenon is that an efficient anodic inhibitor prevents corrosion of steel by forming a protective film on the surface
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1987 effect of pyrite and pyrrhotite on the corrosive wear of grinding media mining metallurgy exploration 4 3 166171 online publication date 1aug1987
more2s corrosion localized corrosion pyrrhotite troilite xray diffraction introduction in h 2scontaining environments encountered in the oil and gas industry localized corrosion is a potential cause leading to facility failure there can be a high rate of metal loss in a very limited area which may be
Abstract electrochemical interactions between grinding media and sulfide ores were studied through rest potential combination potential and galvanic current measurements as well as polarization experiments using electrodes of grinding media materials and pyrrhotite po under nonabrasive and abrasive conditions and also through the determination of ball wear data under different aeration
258 15 r j brison and r a campbell optimizing grinding and regrinding in mill design trans smeiaime 245 1973 239245 16 p j moroz jr factors affecting the wear of grinding media during wet ore grinding where corrosive component of wear is small the int corrosion forum devoted exclusively to the protection and performance of
Rl pozzo and i iwasaki pyritepyrrhotite grinding media interactions and their effects on media wear and flotation electrochem soc voi 136 no 6 1989 p 17341740 6 rl pozzo and i iwasaki effect of pyrite and pyrrhotite on the corrosive wear of grinding media miner metall process aug 1987 p 166171 7
Influence of pyrrhotite on the corrosive wear of grinding the influence of pyrrhotite on the corrosive wear of grinding balls in magnetite ore grinding was studied using three types of balls namely mild steel high carbon low alloy hcla steel and austenitic stainless steel under different aeration conditions
Influence of pyrrhotite on the corrosive wear of grinding the influence of pyrrhotite on the corrosive wear of grinding balls in magnetite ore grinding was studied using three types of balls namely mild steel high carbon low alloy hcla steel and austenitic stainless steel under different aeration conditions
The influence of pyrrhotite on the corrosive wear of grinding balls in magnetite ore grinding was studied using three types of balls namely mild steel high carbon get price mobile grinding mill for ore loesche mobile grinding mill for ore 2 such as grinding pressure grinding energy wear values and flow rate of process gas
Jul 01 1985 the role of abrasive andor corrosive wear was determined by comparing the wear rates which result under a range of grinding atmospheres ie o 2 n 2 or compressed air flushing through a laboratory mill of 8 in diameter coupled with examination of ball surfaces after grinding using scanning electron microscopy
The effects of percent solids mill loading and grinding time on product size distribution and ball wear were studied in a laboratory ball mill for a taconite ore mild steel balls and hcla steel balls were used to examine the role that ball hardness play in grinding net production of 44m 325mesh material reached maximum at 70 solids whereas the ball wear decreased as pulp
Influence of pyrrhotite on the corrosive wear the influence of pyrrhotite on the corrosive wear of grinding balls in magnetite ore grinding was studied using three types of balls namely mild steel high carbon get price blast furnace slag ball millgrinding mill
Influence of pyrrhotite on the corrosive wear of in ternational journal of mineral processing 13 1984 7381 73 elsevier science publishers bv amsterdam printed in the netherlands influence of pyrrhotite on the corrosive wear of grinding balls in magnetite ore grinding jan and i mineral resources research
The effect of grinding media composition mineral type and slurry environment on the wear rate of various grinding media balls are discussed sufficient wear data have been obtained and correlated modes of wear were determined from examination of the ball surfaces using scanning electron microscopy five modes of wear have been identified to be operative under certain slurry conditions
In this study influence of two factors including media type and dissolved oxygen were investigated in galvanic interaction between minerals chalcopyrite and pyrite and media influence of pyrrhotite on the corrosive wear of grinding balls in magnetite ore grinding international journal of mineral processing vol 13 no 1 pp 73
Therefore the aims of this research were to investigate the grinding chemistry influence slurry ph solid percentage water chemistry and gas purging on corrosive wear of steel balls and to
Influence of pyrrhotite on the corrosive wear the influence of pyrrhotite on the corrosive wear of grinding balls in magnetite ore grinding was studied using three types of balls namely mild steel high carbon get price blast furnace slag ball millgrinding mill
Ball mills are common grinding equipment in mineral processing industries ball wear results from three mechanisms namely impact abrasion and corrosion of these the corrosion mechanism is the least investigated due to its chemicalelectrochemical nature therefore the aims of this research were to investigate the grinding chemistry influence slurry ph solid percentage water chemistry
Fine grinding may be required for some coals to remove sulfur and ash or io prepare coalwater slurry fine grinding leads to increased ball wear and its effect on the surface properties of the ground coal becomes of concern marked ball wear tests were performed to study the effects of oxygen ph the soluble species of coal and the addition of pyrrhotite on ball wear
Wear 031985253267 253 corrosive and abrasive wear in ore grinding i iwasaki s c riemer and j n orlich mineral resources research center university of minnesota minneapolis mn 55455 usa k a natarajan indian institute of science department of metallurgy bangalore 560012 india received march 26 1985 accepted may 9 1985 summary the relative significance of corrosive
Grinding media corrosion rate similarly the iron industry consumed approximately 708000 tons of grinding media to produce pellets in 1978 the bureau of mines is investigating the corrosion of grinding media to identify the chemical and electrochemical factors that influence this corrosion and to determine the extent to which corrosion contributes to consumption of the media
Effect of pyrite and pyrrhotite on the corrosive wear of the electrochemical behavior of a threeelectrode system involving pyrrhotite pyrite and grinding media was also investigated as a first step toward elucidating the nature of interactions that occur in grinding complex sulfide ores influence of grinding media and water quality
258 15 r j brison and r a campbell optimizing grinding and regrinding in mill design trans smeiaime 245 1973 239245 16 p j moroz jr factors affecting the wear of grinding media during wet ore grinding where corrosive component of wear is small the int corrosion forum devoted exclusively to the protection and performance of
The influence of pyrrhotite on the corrosive wear of grinding balls in magnetite ore grinding was studied using three types of balls namely mild steel high carbon low alloy hcla steel and
Wet grinding efficiency was found to be dependent on media hardness while wear under wet grinding was much higher in general than that under dry grinding with respect to mill size it was found that the smaller laboratory mills tended to overemphasise corrosive wear compared with
The effect of oxygen on corrosive wear becomes increasingly felt in the presence of a sulfide mineral such as pyrrhotite wear characteristics of the three types of ball materials under different
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