The F.C. Bond Ball Mill is a small universal laboratory mill used in calculating the grindability of all ores. GRINDASILITY IS TIM NUMBER OF NET GRAMS OF SCREEN
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F.C. BOND BICO BALL MILLThe F.C. Bond Ball Mill is a small universal laboratory mill used in calculating thegrindability of all ores.GRINDASILITY IS TIM NUMBER OF NET GRAMS OF SCREEN IJNDERSZEPRODUCED PER REVOLUTION.This Ball Mill can be used continuously or it can be used for any numbq ofrcvolutions,accoding to the type of grind desired. For instance, the Frcd C. Bond Grindabiliry Tests w•remade in the Bico Mill rurming at 70 revolutions per minute, with a charge of285 iron ballsranging in size from 3/4 inch to 1-1l2 inch in diameter, and weighing approKimately 20,125grams. 700 CC ofminus 6 mesh, stage crushed, dry feed was used and the circulation loadmaintain•d constant at 250% by adjusting the number of revolutions for each grinding period.BALL CHARGE DETERMINATIONBecause ofvaxiations in ball size, no exact number ofballs ofeach size can be specified.The ball charge is prepared by starting with 285 balls, consisting of approximately equal weightsofvarious size balls. These sizes include: 3/4 incbr T 18 irrch, 1 inch, 1-114 inch and 1-112inch.. about 400 grams ofeach size. With 285 balls always present, some balls ofone size areremoved ard replaced with the next size of larger or smaller balls.This is continued until the total rveight is at close to 20,125 grams as possible, makingthe last adjustment with the smallest size of balls. Do not remove all the balls of any one size.Once a suitable grinding charge is prepared from one grade ofballs, count and note the numberofballs of each size.Other batches ofthe same grade can be started using this count, and firther adjusted ifnecessary. It is IMPORTANT to ietain the “one for one” rutio while adjusting the final weightto maintain the DroDer ball count.continued. ..
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OPERATING INSTRUCTIONSCoruect the powet supply to the contol box. Wircs arc protuding for easy aonnection.Make sule all circuit breake$ arc of to avoid sev•re electical shock.This machine is equipped $r’ith an automatic counter. To set the count•r, press the buttonto the desired numb•r ofrcvolutions. The switch has two positions, “RUN” for normal use, and”JOG” to move tho drum to a desired positiotr (for emptyns),To load the drum, “JOG” thc drum Asning until it faces upwaid. Rsrnove the cover andgasket, Insert the sample atrd ball charge into the drum. Replace th• gasket and cov•r. Set thenumbcr ofrevolutions you desirc on the counter and start the motor by pushing the strrt contol.The machine will stop automatically when tle number ofrevolutions is reached. Again,us• the “JOG” button to positio[ the opening of the drum upwad towards the ceiling. Now,remove.the cover atrd gaskot. Agai!. ‘JOG” the opening of the drum towards the receiving panso the sample and balls can discharye iltto the reccivilg pan.
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F. c. BOND BALL MILL CEARGEWe fird that the question ofcolrert bsll chargc arises oft•u and is still yery debatable.Back in 1960, Mr. Bond himself recommended thc chargc dcscribed;43 batle – 1-ll2 inch (1.45)67 balls – 1-ll4 iuch (1.17)10 balls – 1 inch (1.00)7l balls – 3/4 inch (.75)94balls – 5/8 inch (.61)285 BALLS Total wt. =rDx.44.5lbs.Mr. Bond himsclf admittcd tllat it is very difrcult to spwifr a given number ofballs ofeach weight, and in oul most receni conglondlncr with Mr. Bon4 ha l•coDtrl•ad•d a chsrgeexcluding the 5/8 ittch (.61) balls. Becausc ofthis, Bico Inc. o(pcrimrntdly came up with thcfollowing figure for a cbrrge:25 balls – 1-ll2 inah (1.50)39 balls – l-1l4 inch (1.25)60 balls – I itrch 0.00)68 balls – 7/8 inch (.875)93 balb- 3/4 inc.h ( .75)285 b&llr Totrt wL = apr. 44.5lbs.We irclude scveral exta balls of cach size so that tbe charge cau b• manipulat•d to resultin the 20,125 gm total n’it! 285 ba!s.
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BICO INc; F. C. BOND BALL.MIL,LSPARE PARTSPLEASE SPECTtrY SERIAL NUMEER WEEN ORI’f,RING(.ATAI.OG # NN-SCf,r?ITON I trS/I(GDruD, with Shaffs (Pleasc speciS SA.I)CovcrHaagsrTable with LegsPillow BlockAsb•stos Gasks,t50IIz Dgital Comter/Jogging Swibh60 Ilz Digitsl CounlF4ogging SfitcltCouDter BrackctCourtlr hrorPao with Ss’reca ard Rccaivitrg PaltChEge ofBaUsChain CuardChain, onc l•agth = 29 inchcsConnecting link foi 60 I{Z opaetiodOffsct link for 50IZ opcrdionShaft Key*** Sprockets arc avsilable and quoted upon rcqucat. (S/N ed IU rcquired).BM-IBM-2BM.3BM4NBM-9BM-I2BM-134BM-138BM-13CBM.13DBM.I4DO8M.15BM-23BM-26BM-294BM.298BM-32n3/521lt513/6109/50tl.4.3t.19t450n231t.5u.4ll.4t/.4
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1.TO TURN DRUII BY}IA ND.-_2. TUR N END OF SHAETW TH W RE NCH,(-r,i oT o R c0vER BEHTNDcoNT ROL PA NE L)”‘lRed8$. o8it’fi’88l’J’AiPufl F oNANDLE AND PUtL IOIiARDS YOU.!,PESS ;HESE 4 LOWEP BU_TO\S N ‘IURN -O SET N LI,lBERABOVE EACH. _ SETSWITCH ON RUN. – PRESS SIART BUTTON-f/IACHINE WILL SHUT OFF A FTER NUN4BER 0F TURNS COMPLETE., TO JOG N4ACHlNE’ I. P.’T SWITCH ON JOG. 2. KEEP PRESSINGSTART BUTTON 0N AND OFF UNTIL DESIRED POSlTl0N-.’lS IRE ACHE D,amzz
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