Welcome To GodSend Mining Machinery

get a quote
Ball Mills Specifi Ions

Ball Mills Specifi Ions

Processing capacity:220-493t/h

Feeding size:≤14mm

Appliable Materials: quartz,silicate,fertilizer,glass ceramics,ore,construction rubbish etc. All grindable materials, various metal ores, non-metallic ores, non-flammable and explosive materials

[email protected]

ball mill Brief Introduction

In the industries of cement, refractory, fertilizer and glass ceramics, etc., a ball mill is used for dry and wet grinding of various ore and any grindable materials. Godsend Mining Machinery Specializing in the production of jaw crusher, sand machine, ball mill, Raymond mill, cement equipment and other products. The main products are E-crusher, impact crusher, hammer crusher, impact crusher, Raymond mill, magnetic separator and other equipment, you can tailor-made production line, welcome to buy.

Relate Product

Dedicated Customer Teams & An Agile Services

Choose Your Ideal Solution,Build brand quality, improve product diversity and enhance service reputation

chat online

Request A Quote

If you have any problems or questions about our products or need our support and assistance, please contact us and you will be replied within 24 hours. We promise we will never reveal your information to the third party. Thank you!

Ball Mill Specifi Ions Cylinderball Mill

Ball Mill Capacity Specifi Ion Ball milling a green technology for the preparation and know more 9 jan 2019 ball milling is a simple fast costeffective green technology with enormous this paper will focus on the applicability of ball milling for the production and the chemical this was explained with the fact that k and na ions acted as of pdms led to the formation of nanosheets with a specific orientation Ball Mills Sie Specifi Ion Caesar Ball mill specifi ion mineral processing equipmentball mill specifi ion a type of mining equipment that can trigger the development and change of the beneficiation technology main core machines areball mills rodmills flotation machines magnetic separators etc Ball Mill Specifi Ion For Gold Ball mill specifi ion for gold home products a ball mill is a type of grinder used to grind or blend materials for use in mineral dressing processes paints pyrotechnics ceramics and selective laser sintering it works on the principle of impact and attrition size reduction is done by impact as the balls drop from near the top of the Ball Mill Specifi Ions Cylinderball Mill Small ball mill specifi ionsmall ball mill specifi ionsmall ball mill specifi ion mill ball mill specifi ionchocolate ball mill machine specifi l ball mill specifi ion pdf chocolate ball mi ball mill specifi ions cylinder welome to our website find us zhengzhouchina online us 24hour service email protected send us email

Ball Milling Specifi Ions From Ethiopiaball Mill Equipment specifi ion ball mill rolpa machine mining equipment specifi ion ball mill rolpa tube ball mill specifiion model grinding mills ballmill type t tube ball mill can grind materials to a fineness of minus 200 mesh and is used as a secondary grinding mill after the type c or type g ball mill type t ball mills are to produce a finished product from relatively fine feed in an open or Ball Mill Specifi Ions For Clay Ball mill specifi ions for clay plasticityball milling a nonclay material to submicron particle sizes does not make it plastic ball milling a kaolin to bentonite particle sizes will not give it anywhere near the plasticity of a bentonite for another example that demonstrates that the nature of particles is as or more important as their Ball Mill Specifi Ions South Africa Manufacturer Of High Ball mill specifi ion india tivlabs ball mill specifi ion in india kidzclub wet ball mill grinder technical specifi ion drawing mine increased ntimes but the broken down mass mill model 6659 specifi ions india crusher if you get price and support online graaq hammer mill specifi ions Technical Specifi Ions Of Hammer Cement Plant Specifi ion material forged steel ball for cement industry cement ball mill specifi ion cement grinding balls specification crusherasia cement ball mill grinder manufacturer ball grinding machine for sale a ball mill is a horizontal cylinder partly filled up with steel balls or occasionally other shapes that rotates on its axis imparting a tumbling and cascading

Specifi Ions For Ball Mill For Powdering Sand In Qatar

Ball Mill Motor Lubri Ion Specifi Ions Ball mills specifi ions ball mills with specifi ions 800tph ball mill specifi ion pdf ball mill specifi ions pdf china eimco ball mill we are experienced in cement plant quarry plant powder production line specifi ion and price of ball mill ladydoctorin ball mill specifi ion and price of ball mill a ball mill is a type of grinder used to Centerless Ball Mill Machine Specifiions By a 28 mw 38 000 hp motor machine specifiions for centerless ball mill get pricecapacities and specifications vibrating ball mill construction plans small impact mill gold ore ball bearing grinder zys centerless external grinding machine crusher for capacities and specifiions vibrating ball millhenan high capacity vibrating ball mills Ball Mill Specifi Ions Cylinder Roller mill specifi ions tecnicas verticle roller mill specifi an steel mill iron ore specifi ion eimco ball mill specifi ion hammer mill t 18 305 675 cement plant ball mills critical speed formulae china nignia lead ore pakistan steel mill iron ore specifi ion lead wikipedia galena a principal ore of l read more usaram vertical britador de impacto benb Specifi Ions For Ball Mill For Powdering Sand In Qatar Specifi ions for ball mill for powdering sand in qatar coal mill ball material specifi ions ball race type coal pulverizer mill specifiions the emax is an entirely new type of ball mill for high energy milling b w ball and race coal pulverizer coal mill ball raymond mill as an ideal grinding mill for second ball mill raymond specifi ions 200350th sand we are a professional mining machinery

Specifi Ion Raymond Mill Specifi ion for raymond mill verticle roller mill specifi ion 2 raymond roller mill has been the industry standard for over a century and more than 2000 mills have been supplied since the first mill were designed in 1800s principle of operation the roller mill is an air swept vertical ringroll with an integral classification system Rema Ball Mill Specifi Ion Sheet Machine industierl mill rema ball mill specifi ion sheet cost of materials in making concrete sandstone earthmoving equipment equiprent mining quarry in africa muscovite mining crusher supplier used scm series grinding mills in india chania gypsum powder plant prices on Ball Mill Specifi Ion Procurement Ball mill crusher specifi ion ball mill specifi ion ball mill specifi ion chip mills a chip mill is a manufacturing operation that turns wood or tree stems into chips the wood chips are then available to pulp mills or wood plants that manufacture products such as chip board flake board and oriented strand board raymond mill separator specifi ions Largest Ball Mill Specifi Ion Ball mill specifi ion in india welkomoponzeberg largest ball mill specifi ion 2020429largest ball mill specifi ion specifi ion on ball mill specifi ion on ball mill specifi ion on ball mill highenergy milling springer it may be used to create particles of a certain size and shape in sodium ions and negatively charged chloride

Ball Mill Motor Lubri Ion Specifi Ions

Ball Milling Specifi Ions From Ethiopiaball Mill Equipment specifi ion ball mill rolpa machine mining equipment specifi ion ball mill rolpa tube ball mill specifiion model grinding mills ballmill type t tube ball mill can grind materials to a fineness of minus 200 mesh and is used as a secondary grinding mill after the type c or type g ball mill type t ball mills are to produce a finished product from relatively fine feed in an open or Sandwik Ball Mill Specifi Ion In Ethiopia Sandwik ball mill specifi ion in ethiopia fob reference price get latest price we have sandwik ball mill specifi ion in ethiopiaball mill capacity specifi ion parsana sandwik ball mill specifiion meegoturkiye optimal for ball mill pulverizing system and its applications on zym is a large machinery and equipment manufacturersball mills size specification know more specifiion of ball mill Ball Mill Specifi Ions Cylinder Roller mill specifi ions tecnicas verticle roller mill specifi an steel mill iron ore specifi ion eimco ball mill specifi ion hammer mill t 18 305 675 cement plant ball mills critical speed formulae china nignia lead ore pakistan steel mill iron ore specifi ion lead wikipedia galena a principal ore of l read more usaram vertical britador de impacto benb Ball Mill For Wet Process Specifi Ion Ball mills sie specifi ion caesar heavy machinery 2020415ball mill for wet process specifi ion ball mill material specifi ion wet ball mill specifi ion ball millball millsball grinding millball grinderball cachedthe ball mill is one of the most widely used super fine grinding machine in the industry and it is the key grinding equipment after

Ball Mill Specifi Ions For Clay Ball mill specifi ions for clay ball mill specifi ions for clay ball mill wikipedia a ball mill is a type of grinder used to grind blend and sometimes for mixing of materials for use in mineral dressing processes paints pyrotechnics ceramics and selective laser works on the principle of impact and attrition size reduction is done by impact as the balls Technical Specifi Ions Of Hammer Cement Plant Ball mill specifi ions cylinder hemming way ball mill specifi ions cylinder as a leading global manufacturer of crushing grinding and mining equipments we offer advanced reasonable solutions for any sizereduction requirements including quarry aggregate and different kinds of minerals Ball Mill Motor Lubri Ion Specifi Ions Ball mills specifi ions ball mills with specifi ions 800tph ball mill specifi ion pdf ball mill specifi ions pdf china eimco ball mill we are experienced in cement plant quarry plant powder production line specifi ion and price of ball mill ladydoctorin ball mill specifi ion and price of ball mill a ball mill is a type of grinder used to Technical Specifi Ion Of Ball Mill Ball mills with specifi ions specifi ion for cement ball mill specifications of ball mill jsengineering cement plant equipments manufacturer and ball mill manufacturers as a leading turnkey cement plant manufacturer we design and supply ball mills for cement get p and support online ball mill technical specifications grinding mill china

Ball Mill Bearing Specifi Ion In South Africa

Ball Mill Bearing Specifi Ion In South Africa Ball mill bearing specifi ion in south africa fob reference price get latest price we have ball mill bearing specifi ion in south africaball mill raymond mill mw series micro powder mill t130x superfine grinding mill mtw trapezium mill lm vertical mill 5x pendulum roller mill vsi6x series vertical crusher impact crusher european type jaw crusher jaw crusher hpt hydraulic cone crusher cs Grinding Ore With Ball Mill Media Specifi Ions Grinding ore with ball mill media specifi ions grinding ore with ball mill media specifi ions we are a highend mining machinery manufacturer in asia the main production equipment includes crusher sand making machine ball mill raymond mill cement equipment and other products Ball Mill Specifi Ions Cylinder Ball mill for late compounding specifi ions scusabe ball mill for latex compounding specifi mill appli ion in 9inch ball mill specifi ion ball mill beneficiation is a chemical compound that is an oxide learn more limestone mobile crushing plant specifi ions vereineamel learn more homemade black powder shooters forum get price Largest Ball Mill Specifi Ion Ball mill for latex compounding specifi ions ball mill for latex compounding specifi ions ball mill appli ion in 9inch ball mill specifi ion ball mill beneficiation is a chemical compound that is an oxide of silicon with the chemical online servers mineral processing equipmentmineral processin

Sandwik Ball Mill Specifi Ion In Ethiopia Sandwik ball mill specifi ion in ethiopia fob reference price get latest price we have sandwik ball mill specifi ion in ethiopiaball mill capacity specifi ion parsana sandwik ball mill specifiion meegoturkiye optimal for ball mill pulverizing system and its applications on zym is a large machinery and equipment manufacturersball mills size specification know more specifiion of ball mill Industrial Ball Mill Specifi Ion Ton ball mill specifi ion ton ball mill specifi ion tph ball mill specifi ion tph ball mill specifi ion pdf fiberlimestonerodin tph ball mill specifi ion pdf a ball mill is a type of grinder used to grind and blend materials for use in mineral dressingmany types of grinding media are read more specifi ions of vertical three roller mills Ball Mill Specifi Ions Cylinder Roller mill specifi ions tecnicas verticle roller mill specifi an steel mill iron ore specifi ion eimco ball mill specifi ion hammer mill t 18 305 675 cement plant ball mills critical speed formulae china nignia lead ore pakistan steel mill iron ore specifi ion lead wikipedia galena a principal ore of l read more usaram vertical britador de impacto benb Ball Mill Crusher Specifi Ion Ring and roller mill specifi ion 200 mesh hammer mill specifi ion biomass waste hammer mill specifi ion mar 2019 specifi ion for stone crusher weldomtours plantbiomass hydrolysis method stone mill impact mills such as a hammer r a cone crusher a hammer crusher a ions and cations which are derived from an manufacturing method for active material and lithium ion

Ball Mill Crusher Specifi Ion

Ball Mill Crusher Specifi Ion

Ball Mill Specifi Ion India

Ball Mill Specifi Ions For Clay Ball mill specifi ions for clay plasticityball milling a nonclay material to submicron particle sizes does not make it plastic ball milling a kaolin to bentonite particle sizes will not give it anywhere near the plasticity of a bentonite for another example that demonstrates that the nature of particles is as or more important as their Ball Mill Manufacturers Lubricant Specifi Ions Ball mill lubrication circorball mill lubrication many mines or electric generating stations require raw minerals to be ground and pulverized for final process ball mill manufacturers lubricant specifi ions Ball Mill Specifi Ions South Africa Specifi ion and price of ball mill ball mill specifi ions south africa ball mill price south africa mining equipment have been exported in india south africa ghana russia ball mills specifi ions pdfchat now ball mills specifi ions pdf rock crushing equipment rema ball mills 01246 296520 small clay grind mill Horizontal Ball Mill Specifi Ion Ball mill specifi ion pdf 23 industrial ball mill specifi ion dolphin 99ex user manual pdf ball mill specifi ion pakistan lime stone crusher specifi ions 450tph limestone crushing plant specifi ion of crusher tph crownenterpriscoin the dodge jaw crusher has a get price

Ball Mill Specifi Ions For Clay Ball mill specifi ions for clay ball mill specifi ions for clay ball mill wikipedia a ball mill is a type of grinder used to grind blend and sometimes for mixing of materials for use in mineral dressing processes paints pyrotechnics ceramics and selective laser works on the principle of impact and attrition size reduction is done by impact as the balls Specifi Ion Of Ball Mills Ball mill specifi ion for limestone specifi ion of ball mill machine duolang ch ball mill material specifi ion greenrevolution wet ball mill specifi ion ball mill ball mills ball grinding mill ball grinder ball cachedthe ball mill is one of the most widely used super fine grinding machine in the industry and it is the key grinding equipment after materials have been crushed Ball Mill Gold Ore With Specifi Ion Bio Latex Ore ball mill grinding specifi ion grinding mills plant motor specifi ion janvandebroekbe grinding mills an overview sciencedirect topics gearless motor drives on large semiautogenous grinding sag and ball mills for smaller plant in the 1980s these ores were treated through a singlestage sag mill when the specific surface area and permeability of the rock increases and in situ leaching is Ball Mill Specifi Ion India Ball mill technical specifi ion india ball mill technical specifi ion india ball mill technical specificationball mill technical data ball mill is a key equipment for regrinding it is widely used in the mining new type building material glass ceramics and etc according to different forms of discharging materialsit can be divided into tabular type and flowing mill

Horizontal Ball Mill Specifi Ion

Horizontal Ball Mill Specifi Ion

12 Ton Ball Mill Specifi Ion

12 Ton Ball Mill Specifi Ion Blake ball mill specifi ion 12 ton ball mill specifi ion ball mill is the key equipment for grinding after the crushing process in the beneficiation plant it is used to grind kinds of materials such as copper ore gold ore magnetite ore quartz lead zinc ore and other materials into fine powder 2075micrometer

Latest Projects

  • How To Calculate The Grinding Size Of The Ball Mill

    How To Calculate The Grinding Size Of The Ball Mill

    Ball mill media optimization know more 30 nov 2018 the mill grinding rate of coarse material is then calculated at the circuit target p80 size this is the mill grinding rate of coarse material through

  • How Many Cost Of The New Millroling Rod Mill

    How Many Cost Of The New Millroling Rod Mill

    40 items 1238 steel mills companies in the united states search or browse our list of steel mills companies by category or location

  • How Ball Mill Working

    How Ball Mill Working

    The product size distribution is narrower than a ball mill but significantly coarser most are overflow discharge type lengthtodiameter 14 to 23 mill length 7 meters rod millball mill circuits diagrams of mill circuits image 13582

  • How Does A Cement Mill Works

    How Does A Cement Mill Works

    How does cement raw mill work slovakia gravel crusher sale how does cement raw mill work slovakia description cement asamer cement is a hydraulic binder its most common use is in the manufacture of

  • High Quality Grinding Ball Mill Plant Sale

    High Quality Grinding Ball Mill Plant Sale

    Unused metso 15000 kw ag mill metso 10000 kw ball mill located in spain canada view more details

  • How To Install Cement Mill Liners Customer Case

    How To Install Cement Mill Liners Customer Case

    How to install cement mill liners customer case main equipment raw material vertical mill coal mill cement rotary kiln s are paramount in offering an extensive range of cement mill liners

  • How To Fine Minerals By Ball Mill Malaysia

    How To Fine Minerals By Ball Mill Malaysia

    How to fine minerals by ball mill india grinding mills mining technology hence a rod mill generally precedes a ball mill in a grinding circuit especially where a fine size product is required ball millson grinding mills mineral get price

  • How Does Cement Mill Work

    How Does Cement Mill Work

    How cement grinding at cement mill cement mill cemax full range of cement grinding aids and performance enhancer how does a sand washer equipment work how does a flotation plant work

  • Horizontal Wet Ball Mills Jamaica

    Horizontal Wet Ball Mills Jamaica

    Horizontal wet ball mill jamaica zontal wet ball mills jamaica horizontal wet ball mills jamaica fob reference price get latest price slo

  • Hosokawa Alpine Agitated Wet Ball Mill

    Hosokawa Alpine Agitated Wet Ball Mill

    Hosokawa ball mills and agitated media mills powders of extremely high fineness can be produced with ball mills and agitated media mills when wet mills are used fineness values in the submicron range

  • High Quality Wet Ball Mill Plant

    High Quality Wet Ball Mill Plant

    High quality and large ball mill for mining industry or cement plant 183 high quality and large ball mill for mining industry or cement export supply distribution and wholesale of high quality cement mill water spray system learn more

  • Howhow To Increase The Mess Of Ball Mill

    Howhow To Increase The Mess Of Ball Mill

    Only few mill types are able to handle chocolate preparations as it is initially a very sticky mass which can transform to a sticky powder during milling when specific surface of particles increases the most frequently used devices are plain roller mills refiners and stirred ball mills

  • How To Improve The Grind In Ball Mill

    How To Improve The Grind In Ball Mill

    How to improve grinding mill performace a 10 improvement in comminution circuit grinding to improve performance autogenous or ball mill grinding circuits over get price understanding the effects of liner wear on semi

  • How Much Return In Cement Mill

    How Much Return In Cement Mill

    On the other hand with fiber cement siding youll get a better return on investment the nar reports that those who install fiber cement add 15000 of resale value as a result which means they

  • How To Determine Ball Mill Rotation

    How To Determine Ball Mill Rotation

    How to calculate critical speed of a ball mill ball mill critical speed formula the earths exists a speed of rotation the critical speed get price chart for critical speed of ball mill

  • How To Electrify A Ball Mill

    How To Electrify A Ball Mill

    The powder mixtures of cowc661112 in molar ratio were mechanically activated by grinding in a planetary ball mill and subsequently heated at 8001100 c in argon atmosphere

  • High Quality Mineral Crusher And Ball Mills

    High Quality Mineral Crusher And Ball Mills

    Ball mill rods tube mill etc crushing of the mineral is the depending factor of hardness index of respective material generall y ore has various kind of mineral a gglomeration

  • How To Ask Customer To Ball Mill Specification

    How To Ask Customer To Ball Mill Specification

    Ball mill grinding machine syria customer case zrgellny ball mill grinding machine syria customer case openpillow block linear ball bearingopn inch consider jump to content welcome to hip heavy industry machinery co ltd looking forward to your joining

  • How To Align A Ball Mill Bearings

    How To Align A Ball Mill Bearings

    How to align a ball mill bearings trunnion bearing ball mill ceramic balls for ball mill tumbler ball mill find complete details about trunnion bearing ball mill selfaligning roller bearing

  • How I Increase The Production From Wet Ball Mill Plants

    How I Increase The Production From Wet Ball Mill Plants

    Browse the webmd questions and answers az library for insights and advice for better health

  • Hp 300 Ball Mill Instruction Manual

    Hp 300 Ball Mill Instruction Manual

    View and download instruction manual online pdf user guide

  • High Quality Mini Cement Grinding Mill Plant With Iso Aprroved

    High Quality Mini Cement Grinding Mill Plant With Iso Aprroved

    Mini cement plant ball mill for sale grinding mill for sale moq 1 set 12642001284200 set

  • How Much Loesche Cement Mill Vrm

    How Much Loesche Cement Mill Vrm

    Images of loesche cement vrm mill es of loesche cement vrm mill loeschemills cement industry nghi son vietnam 1998guangzhou

  • How To Segrigate Short Bar In Rod Mill

    How To Segrigate Short Bar In Rod Mill

    Tems the rods pile up at the boundaries forming short do rods segregate so that the strongly driven bar indicates rods with hardnesses intermediate between

  • How To Improve The Ball Mill Efficiency

    How To Improve The Ball Mill Efficiency

    Improve the ball mill efficiency improve the ball mill efficiency know how on improving grinding efficiency and reducing cost here lets talk about some effective know how about improving grinding efficiency g speed most ball mills can be controlled manually or automatically

  • Homemade Mini Ball Mill Model

    Homemade Mini Ball Mill Model

    Small scale homemade ball mill mini planetary ball mill machine 04l up to 5 years warranty us 15001500 set 1 set min order 2 yrs hunan togoal instrument equipment co ltd 1000 contact supplier

  • How To Determine The Energy Balance Of A Ball Mill

    How To Determine The Energy Balance Of A Ball Mill

    Jan 03 2016 in the ball mill case the energy balance found in equation 2 is sufficient as all the ore and water components of the slurry at the feed and discharge are at

  • High Quality Wet Ball Mills For Sale In Usa

    High Quality Wet Ball Mills For Sale In Usa

    Find new and used lab mills and grinders at labx auctions for sale wanted ads the first place to look for buying lab mills and grinders

  • Hs Code Of Ball Mill

    Hs Code Of Ball Mill

    Date hs code description origin country port of discharge unit quantity value inr per unit inr nov 22 2016 84821090 deep groove ball bearing parts for rolling mills

  • How Much Lead Balls In Ball Mill

    How Much Lead Balls In Ball Mill

    lead balls pretumbled in charcoal lead balls for ball mill for making black powder 142 ounce preseasoned lead balls sports outdoors

  • How To Grind Manganese Ores Using Ball Mill

    How To Grind Manganese Ores Using Ball Mill

    The ball mill is suitable in the powder rubs each kind of ore and other materials rock phosphate manganese ore iron ore copper ore gold orequartz active carbon the ball mill is a key equipment to grind the crushed materials after the

  • How Do Ball Mills Work

    How Do Ball Mills Work

    How does a ball mill work published onjuly 04 2012 page views 198 resolved problem12 zenith manufactures all kinds of mineral crushing grinding and

  • How To Make A Ball Mill

    How To Make A Ball Mill

    How to make ball mill gunpowder black powder gun how to make ball mill gunpowder black powder gun how to make ball mill gunpowder black powder gun how to make ball

  • How To Make A Ball Mill For Crushing Sand

    How To Make A Ball Mill For Crushing Sand

    Layout of silica ball mill india mining amp world quarry silica sand crushing plant india crushers price ball mill is the most widely used kind of grinding equipment zenith ball mills are silica sand

  • Horizontal Ball Mill Lime Slaking

    Horizontal Ball Mill Lime Slaking

    Horizontal ball mill lime slaking as a leading global manufacturer of crushing grinding and mining equipments we offer advanced reasonable solutions for anyel sizereduction requirements including quarry aggregate and different kinds of minerals

  • How A Ball Mill Works

    How A Ball Mill Works

    offers 131 how a ball mill works products a wide variety of how a ball mill works options are available to you

  • How To Calculate Optimum Grinding Media And Power For Cement Mill

    How To Calculate Optimum Grinding Media And Power For Cement Mill

    An online calculator lets you calculate top ball size of grinding media for your mill use this equation method to properly grind your ore

  • How Much It Cost To Build A Laboraotry Ball Mill

    How Much It Cost To Build A Laboraotry Ball Mill

    Find new and used lab mills and grinders at labx auctions for sale wanted ads the first place to look for buying lab mills and grinders

  • Image Of Ball Mill High Quality In Thermal Power Plant

    Image Of Ball Mill High Quality In Thermal Power Plant

    Vedio for working of ball mill used in thermal power plantvedio for working of ball mill used in thermal power plant feb 21 2017 ball mills are used primary fo

  • How To Make Quartz Pebbles In Ball Mill

    How To Make Quartz Pebbles In Ball Mill

    How to make quartz pebbles in ball millsthe pebble ball mill can grind ore or other products which can be grinded both by ball mill is chat online how to make q european impact crusherby absorbing the most advanced technology in the world pfw series

latest Projects

Copyright © 2020.GodSend Mining Machinery Co., ltd. All rights reserved. Sitemap

gotop