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We are a professional mining machinery manufacturer, the main equipment including: jaw crusher, cone crusher and other sandstone equipment;Ball mill, flotation machine, concentrator and other beneficiation equipment; Powder Grinding Plant, rotary dryer, briquette machine, mining, metallurgy and other related equipment.If you are interested in our products or want to visit the nearby production site, you can click the button below to consult us.

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Discharging Bushing Of Ball Mill

Discharging Bushing Of Ball Mill

Discharge of pebbles finer rock ball scats and slurry from mills and its flow through trommels and into other processing operations has strong impacts on overflow ball mill performance Alibabacom offers 830 grate discharging ball mill products a wide variety of grate discharging ball mill options are available to you such as local service location applicable industries and warranty May 29 2017 grinding the material evenly or not seriously affects the production efficiency of ball mill uneven ball mills discharging may be caused by the following two aspects firstly the feeding grinding materials cause the uneven discharging when water into the grinding material is high it may cause the ball mill grinding full phenomenon

Mineral For Iron Ore Obsidian Ball Mill Equipment  Exomos

Mineral For Iron Ore Obsidian Ball Mill Equipment Exomos

China gold ore ball mill manufacturers select 2021 high quality gold ore ball mill products in best price from certified chinese mining equipment mining machine suppliers wholesalers and factory on madeinchinacom Ball mills archives mineral processing amp metallurgy the phenomenon known as surging consists of a pendulumlike oscillation of the in all ore dressing and milling operations including flotation cyanidation fine grinding machines have been developed and used but the ball mill has Flow chart to concentrate magnetite ore in mineral dressing plant magnetite ore beneficiation process crushing equipment primary crushermmjaw crusher secondary crusher mmcone crusher grinding equipment wet ball mill concentrate dressing double spiral classifier cylinder screen magnetic separator thickener dehydration tank flotation machine contact

Ball Mill Grinding Media In Malaysia

Ball Mill Grinding Media In Malaysia

100ml alumina ceramic lab planetary ball mill grinding jar w ball media brand new 16900 buy it now free shipping watch small ball grinding mill machine horizontal lab planetaryball milling machine 2l brand new 446870 from china or best offer 56000 shipping 3the ball mill size liner and grinding media can be properly selected according to density and hardness of raw material and production capacity etc 4grinding time can be adjusted according to production requirement 5suitable for mixing and grinding different kinds of material China grinding media ball manufacturers select 2021 high quality grinding media ball products in best price from certified chinese ceramic grinding machine suppliers wholesalers and factory on madeinchinacom

Ball Mills Secondary

Ball Mills Secondary

Ball mills china manufacturer 231 likes we supply ball mills for copper magnetite molybdenite zinc ore iron ore gold hematite fluorspar lead amp Inventory id 6cgf01 2 units unused citic 165 x 26 overflow ball mills 3400 kw 4560 hp 60 hz Mar 15 2016 how to cite this article cagnetta g et al dioxins reformation and destruction in secondary copper smelting fly ash under ball milling sci rep 6

Hot Sell In Russia Quarry Mining Ball Mill Machine  Grind

Hot Sell In Russia Quarry Mining Ball Mill Machine Grind

Alibabacom offers 2382 glass grinding ball mill products a wide variety of glass grinding ball mill options are available to you such as warranty of core components applicable industries and type Mobile crushing plant in russia map today fabrikasi stone crusher pt jakarta mill table maintenance quarry and mine belt iron ore grinding ball mill splitter crusher vitaminder mobile crushing and screening plants in south africa lowest price for grinders stone crusher job in Ball mills strommashina russia samara ball mills manufacturer ball mill working principle a ball mill is a type of grinding mill it is an aggregate for grinding and crushing grinder of hard materials that has the same goal as other grinding machinery and crushing machineryball mills are used for crushing and mixing of raw materials while rotating the grinding media balls beads pulps

Ball Milling Achieved

Ball Milling Achieved

Initial stage of ball milling fructose was the main product which achieved a maximum yield of catalysts 2017 7 170 3 of 8 175 at 05 h and then gradually decreased to 24 after 6 h Ball milling is widely used in industry to mill particulate material the primary purpose of this process is to attain an appropriate product size with the least possible energy consumption In powder metallurgy mechanical ballmilling has been extensively applied to process coarse materials into fine powders andor to produce alloy metals uniformly 202223242526

Continious Ball Mill

Continious Ball Mill

Modern engineering company is specialized in engineering highefficiency continuous ball mill that ensures optimum blending and grinding operations especially in mineral processing sintering application Energy saving small continuous ball mill 1 spare parts for crusher 2 the materialmanganese steel high manganese steel high chromium and wear resistant steel and so on ball mill is mainly used to grind materials in mineral cement refractory chemical industry etc Anasayfa continuous ball mill mmtcbm500 continuous ball mill about product technicial specifications technical installation scheme technicial specifications series mmtcbm500 capacity 500 kg input 80100 output 2025 micron air pressure 68 bar motor power 375 kw power 50 kw 380 v mixing speed 180 rpmmin

Ball Mill Manufacturing Manufacturing Process

Ball Mill Manufacturing Manufacturing Process

Ball mill for glove manufacturing process worldcrushers may 02 2013 ball mill over 6967154 to speed up the grinding process and get an increased production capacity manufacturing china trustpoints 0 contact now used mills for sale Manufacturing of aluminum ake powder from foil scrap by dry ball milling process seonghyeon hong dongwon lee byoungkee kim department of materials engineering korea institute of machinery and materials 66 sangnam Jxsc ball mill manufacturer has industrial ball mill and small ball mill for sale power range 185800kw during the production process the ball grinding machine may be called cement mill limestone ball mill sand mill coal mill pebble mill rotary ball mill wet grinding mill etc

Alex Doll Grinding Circuit Sag Ball Mill Calculations

Alex Doll Grinding Circuit Sag Ball Mill Calculations

Alex doll grinding circuit sag ball mill calculations alex doll grinding circuit sag ball mill calculations amaze international alstorm technologies india how to calculate charge in ball mill calculation of get price pre coal mill pulverizers used in cement mills Dec 06 2017 the size range treated by sag milling from 150 mm down to 2 mm is all easy to break according this metric and it is the ball mills that will have difficulty treating this ore not the sag mill Oct 24 2018 people are mistaking the operating work index for the specific energy consumption of an operating mill or circuit the bond ball mill work index determination is a more from alex doll

Ball Mill Grinding Mill Zhengzhou  Machinery

Ball Mill Grinding Mill Zhengzhou Machinery

Apr 18 2015 china rotary dryer supplier ball mill grinding mill manufacturers suppliers zhengzhou bangke machinery manufacturing co ltd China ball mills ball mill machine ball grinding mill us 5000 5000 set other none nonesource from zhengzhou jinma mining machinery co ltd on alibabacom Buy high quality ball mill by zhengzhou global heavy machinery co ltd supplier from china product id 291441

Continuous Grinding In A Small Wet Ball Mill Part Iv A

Continuous Grinding In A Small Wet Ball Mill Part Iv A

May 01 1973 txx influence of changes in grinding media load and density on the grinding behaviour of trace quantities of quartz within an environment of calcite in a small continuous wet ball mill have been studied using a ball loads ranging from 45 to 100 of the standard load of 1in balls b a standard load of 1in pebbles and c standard loads of equicylinders with specific gravities ranging

Library  Union Process

Library Union Process

Wet attrition mills wet grinding laboratory mills wet batch laboratory mills wet circulation laboratory mills chocolate grinding attrition mills limestone grinding ball mill cl limestone slaker ball mill cls small media bead mills sdm wet grinding production mills wet batch production mills wet circulation production mills

Ball Mill Working Principle And Main Parts

Ball Mill Working Principle And Main Parts

Ball mill sbm ball mill is one of the new high efficient grinding machinewhich is widely used in the in various types of stone grinding plant ore benefication electricity cement and chemical industriesthis new type ball mill with high comminution ratio it can carry out dry or wet pulverizing and can meet demand for sustainable largescale production

Continuous Grinding In A Small Wet Ball Mill Part Iv A

Continuous Grinding In A Small Wet Ball Mill Part Iv A

May 01 1973 txx influence of changes in grinding media load and density on the grinding behaviour of trace quantities of quartz within an environment of calcite in a small continuous wet ball mill have been studied using a ball loads ranging from 45 to 100 of the standard load of 1in balls b a standard load of 1in pebbles and c standard loads of equicylinders with specific gravities ranging

Ball Mill  Easystudypoint

Ball Mill Easystudypoint

Apr 01 2021 the ball mill machine is wide accustomed method cement salt product building material refractory material fertilizer ceramics and glass etc the ball mill also known as the rod mill will work in a dry manner or wet way you choose the operating way of a little ball mill machine according to your material and discharging way

Limestone Small Wet Ball Mill

Limestone Small Wet Ball Mill

Limestone wet amp dry kaolin ball mill for saleid10055966 ball mill is mainly composed of feeding part discharging part rotary part and driving part which includes reducer small drive gear electrical machine and electronic control

China Small Wet Ore Grinding Ball Mill Gold Mining

China Small Wet Ore Grinding Ball Mill Gold Mining

Small wet ore grinding ball mill gold mining machine extraction equipment working principle the transmission device drives the cylinder to rotate materials and water are fed from the feeding end of the cylinder ores are ground into fine particles by the grinding of steel rods as well as the impact amp grinding of ores themselves

Lab Ball Mills

Lab Ball Mills

Lab jar mill lab roll ball mill dual planetary ball mill cryogenic planetary ball mill vertical planetary ball mill for glove box use heavyduty fulldirectional planetary ball mill laboratory fulldirectional planetary ball mill laboratory horizontal planetary ball mill mini vertical planetary ball mill

How To Control Grinding Efficiency Of The Small Wet Ball Mill

How To Control Grinding Efficiency Of The Small Wet Ball Mill

Sep 18 2015 steel ball loading quantity can be calculated by the volume of small wet grid ball mill when the distance from steel ball surface to the center line of the mill is 016 times of the mill radius the steel ball loaded quantity is ok steel ball weight shall be 115 times of the material of the weight 03 thirdly the material loading quantity

04l Small Laboratory Planetary Ball Mill Machine For

04l Small Laboratory Planetary Ball Mill Machine For

Brief introduction oil seal mute planetary ball mill is a necessary device for mixingfine grindingsmall samples prepareddispersion of nanometer rampd of new product and small batch production for high tech materials the equipment with small volumecomprehensive functionhigh efficiencylow noise which is the ideal device of obtaining microparticle research samples used for research and

A Comparison Of Dry And Wet Grinding Of A Quartzite Ground

A Comparison Of Dry And Wet Grinding Of A Quartzite Ground

In order to investigate the differences between dry and wet grinding as far as the selection and breakage functions are concerned batch grinding experiments were performed on both dry and wet bases on the same material a quartzite in a small ball mill under similar experimental conditions

Understanding Ball Mill Sizing  Industrial Amp Engineering

Understanding Ball Mill Sizing Industrial Amp Engineering

Micromorphological changes and mechanism associated with wet ball milling of pinus radiata substrate and consequences for saccharification at low enzyme loading bioresource technology 2016 214

Small Diesel Wet Ball Mill Ball Mill

Small Diesel Wet Ball Mill Ball Mill

Small ball mill buy quality small ball mill on m alibaba com mqy mining industrial overflowing type gold grinding small scale mining ball mill overflow small wet dry mine laboratory ball mill factory price for gold copper iron chromite ore grinding moq 1 set 1 000 50 000 00 set 3 cn contact supplier china tencan 5l smallest size online chat

Small Diesel Wet Ball Mill Ball Mill

Small Diesel Wet Ball Mill Ball Mill

Small ball mill buy quality small ball mill on m alibaba com mqy mining industrial overflowing type gold grinding small scale mining ball mill overflow small wet dry mine laboratory ball mill factory price for gold copper iron chromite ore grinding moq 1 set 1 000 50 000 00 set 3 cn contact supplier china tencan 5l smallest size online chat

Characterization Of Szegomilled Hemp Fibers

Characterization Of Szegomilled Hemp Fibers

The tumbling ball mill is one of the famous retention mills which has been used widely in both dry and wet grinding for size reduction in different type of applications over a wide range of particle sizes compared to other mills

Kolkata Small Laboratory Wet Overflow Ball Mill Cost

Kolkata Small Laboratory Wet Overflow Ball Mill Cost

Kolkata small laboratory wet overflow ball mill cost laboratory ball mill manufacturers in india 5 kg10 kg ball bionics scientific is a leading laboratory ball mill manufacturers in india and offers its customers a fair deal in buying ball mills with facilities of customized size and capacities up to 10 kg

Small Scale Ore Wet Ball Mill Equipment In Zambia

Small Scale Ore Wet Ball Mill Equipment In Zambia

Ball mill cement ball mill description ball mill is the key equipment for grinding after the crushing process which is widely used in the manufacture industries such as cement silicate new building material refractory material fertilizer ferrous metal nonferrous metal and glass ceramics and can be used for the dry and wet grinding

Uganda Small Wet Ball Mill For Sale

Uganda Small Wet Ball Mill For Sale

Small wet ball mill for sale studentenrath2de wet ball millsmall ball millball mill for saleball mill ball mill is mainly used to grind materials in mineralcementrefractorychemical industry etcball mill has dry and wet wayswhen wet ball mill workscertain water and other liquid will be added into materials to increase flowability of materialsso the capacity is increased

Recovery Of Lead From Leadbased Electronic Ceramics By

Recovery Of Lead From Leadbased Electronic Ceramics By

31 wet ballmill treatment no significant difference in disintegration and dissolution behavior among the pzt pz and pt can be seen so that the data on ballmill treatment of pzt are shown below as a typical example 311 disintegration behavior of pzt figure 1 shows the xrd profiles of the wet ballmilled samples for a 4 b 12

Metalorganic Frameworkbased   Wiley Online Library

Metalorganic Frameworkbased Wiley Online Library

Jun 22 2020 another topdown approach to increase the accessibility of pommof composites has been reported for a keggintype catalyst encapsulated into a cobalt 14bis124triazol1ylmethylbenzene mof 84 the authors claimed that the exfoliation of the pomcomof material into atomically thick nanosheets obtained via wet ballmilling and sonication

Cement Ball Mill  Jxsc Machine

Cement Ball Mill Jxsc Machine

Dec 10 2019 the equipment of ball mill used in cement plant includes vertical cement mill roller press and ball mill etc the cement ball mill in cement plant is usually divided into 24 silos the most representative of which are the new type of high fineness cement ball mill and open flow high fineness cement ball mill

Small Scale Ore Wet Ball Mill Equipment In Zambia

Small Scale Ore Wet Ball Mill Equipment In Zambia

Ball mill cement ball mill description ball mill is the key equipment for grinding after the crushing process which is widely used in the manufacture industries such as cement silicate new building material refractory material fertilizer ferrous metal nonferrous metal and glass ceramics and can be used for the dry and wet grinding

China Gold Ore Ball Mill Gold Ore Ball Mill Manufacturers

China Gold Ore Ball Mill Gold Ore Ball Mill Manufacturers

China grinding ball mill for gold copper ore cement gypsum coal fly ash limestone wet dry small mini ball mill fob price us 670079000 piece min order 1 piece

Continuous Grinding In A Small Wet Rod Mill Part I

Continuous Grinding In A Small Wet Rod Mill Part I

Jun 01 1973 comparison with a small ball mill g w heyes d f kelsall and p s b stewart c s lro division of chemical engineering p o box 312 clayton yrc 3168 austrahaj received november 27 1972 summary tests have been done with a small continuous wet rod mill in order to characterise its dynamic behaviour in terms of the type of model

China 5 Discount Price Wet Iron Tin Aluminum Titanium

China 5 Discount Price Wet Iron Tin Aluminum Titanium

Gold mining equipment gold ball mill ball mill price manufacturer supplier in china offering 5 discount price wet iron tin aluminum titanium manganese silver copper gold small mining ore grinding ball mill machine mini hydraulic charcoal brick briquette press machines peat coal charcoal briquette ball press making machine and so on

China Laboratory Ball Mills For Ultrafine Grinding 2l

China Laboratory Ball Mills For Ultrafine Grinding 2l

Laboratory ball mills for ultrafine grinding is a necessary device of hightech materials mixing fine grinding sample making new product development and small batch production lith planetary ball mill owns small volume high efficiency low noise and functional features which is a ideal equipment for rampd institution university enterprises

China Small Scale Gold Mining Equipment Ball Mill Grinding

China Small Scale Gold Mining Equipment Ball Mill Grinding

Ball grinding stone rock grinder mill ball mill grinding machine manufacturer supplier in china offering small scale gold mining equipment ball mill grinding rock grinder mill china wet pan mill for grinding gold iron lead zinc ore sundan 1th vertical gold milling

Ballmillexfoliated Graphene   Wiley Online Library

Ballmillexfoliated Graphene Wiley Online Library

Apr 17 2019 abstract a simple wet ballmilling method for exfoliating pristine graphite to graphene nanosheets is proposed the surfactant of cetyltrimethyl ammonium bromide is utilized to greatly improve the exfoliation efficiency of graphene nanosheets variation of the ballmilling time is an efficient way to control the size and thickness of graphene nanosheets as well as the level of edge defects

Ballmillexfoliated Graphene   Wiley Online Library

Ballmillexfoliated Graphene Wiley Online Library

Apr 17 2019 abstract a simple wet ballmilling method for exfoliating pristine graphite to graphene nanosheets is proposed the surfactant of cetyltrimethyl ammonium bromide is utilized to greatly improve the exfoliation efficiency of graphene nanosheets variation of the ballmilling time is an efficient way to control the size and thickness of graphene nanosheets as well as the level of edge

Continuous Grinding In A Small Wet Ball Mill Part Iv A

Continuous Grinding In A Small Wet Ball Mill Part Iv A

Abstract txx influence of changes in grinding media load and density on the grinding behaviour of trace quantities of quartz within an environment of calcite in a small continuous wet ball mill have been studied using a ball loads ranging from 45 to 100 of the standard load of 1in balls b a standard load of 1in pebbles and c standard loads of equicylinders with specific gravities

Small Wet Ball Mill Library In Burkina Faso

Small Wet Ball Mill Library In Burkina Faso

Small wet ball mill library in burkina faso tiltable wet ball mill for fluorite in burkina faso uganda fluorite ore dryerrotary kiln materials that fluorite ore dryer can handlehenan caesar 1200 td fluorite processing epc project in widely used in mining chemical building metallurgy cement industries rotary dryer is applicable wet sticky

Small Wet Ball Mill Small Wet Ball Mill Suppliers And

Small Wet Ball Mill Small Wet Ball Mill Suppliers And

3177 small wet ball mill products are offered for sale by suppliers on alibabacom of which mine mill accounts for 34 grinding equipment accounts for 4 and flour mill accounts for 1 a wide variety of small wet ball mill options are available to you such as new

Ball Mill Loading  Wet Milling  Paul O Abbe

Ball Mill Loading Wet Milling Paul O Abbe

Ball mill loading wet milling when charging a ball mill ceramic lined mill pebble mill jar mill or laboratory jar use on a jar rolling mill it is important to have the correct amount of media and correct amount of product charging a wet mill the general operation of a grinding mill is to have the product impacted between the balls as

Small Ball Mill  Mini Ball Mill For Small Scale Mineral

Small Ball Mill Mini Ball Mill For Small Scale Mineral

The small ball mill is a smallcapacity grinding equipment which is defined relative to large ball millit is generally suitable for smallscale production in the trial production stage due to its small size and easy movement small ball mill is sometimes referred to as mobile ball mill the mobile ball mill can be easily moved to the location of the material for onsite grinding and

Ball Mill By Zhengzhou Hengxing Heavy Equipment Co Ltd

Ball Mill By Zhengzhou Hengxing Heavy Equipment Co Ltd

Ball mill features 1 is an efficient tool for grinding many materials into fine powder 2 the ball mill is used to grind many kinds of mine and other materials or to select the mine 3 ball mill is widely used in building material and chemical industry 4 there are two ways of grinding the dry way and the wet way

Grate Ball Millgrate Type Ball Millgrate Ball Milling

Grate Ball Millgrate Type Ball Millgrate Ball Milling

Grate ball mill 1 grate liner 2 bearing inner cover 3 hollow shaft 4dustpan shape liner 5central liner 6 rib 7 wedge block the grate ball mill is usually used in the first segment of the two stages or place of discharging the rough ore

Library  Union Process

Library Union Process

Wet attrition mills wet grinding laboratory mills wet batch laboratory mills wet circulation laboratory mills chocolate grinding attrition mills limestone grinding ball mill cl limestone slaker ball mill cls small media bead mills sdm wet grinding production mills wet batch production mills wet circulation production mills

Ball Mill Loading  Wet Milling  Paul O Abbe

Ball Mill Loading Wet Milling Paul O Abbe

Ball mill loading wet milling when charging a ball mill ceramic lined mill pebble mill jar mill or laboratory jar use on a jar rolling mill it is important to have the correct amount of media and correct amount of product charging a wet mill the general operation of a grinding mill is to have the product impacted between the balls as

Micronizer Mining Machine Small Wet Ore Grinding Ball Mill

Micronizer Mining Machine Small Wet Ore Grinding Ball Mill

3 ball mill is widely used in buliding material and chemical industry 4there are tow ways of grinding the dry way and the wet way 5 ball mill can be divided into tabular type and flowing type according to different expellingmine 6 to use the ball mill the material to be ground is loaded into the neoprene barrel that contains

Small Ball Mills For Sale  911 Metallurgist

Small Ball Mills For Sale 911 Metallurgist

Small c i w ball mill the ciw is a small ball mill thats belt driven rigid bearing wet grinding trunnion or grate discharge type mill with friction clutch pulley and welded steel shell the 7 and 8 foot diameter mills are of flange ring construction with cut gears while all other sizes have cast tooth gears

Ball Mill Working Principle And Main Parts

Ball Mill Working Principle And Main Parts

Ball mill sbm ball mill is one of the new high efficient grinding machinewhich is widely used in the in various types of stone grinding plant ore benefication electricity cement and chemical industriesthis new type ball mill with high comminution ratio it can carry out dry or wet pulverizing and can meet demand for sustainable largescale production

Small Ball Grinder Mill Small Ball Grinder Mill Suppliers

Small Ball Grinder Mill Small Ball Grinder Mill Suppliers

Alibabacom offers 1591 small ball grinder mill products a wide variety of small ball grinder mill options are available to you such as warranty of core components key

Ball Mill  Eastman Rock Crusher

Ball Mill Eastman Rock Crusher

Ball mill is a type of grinder machine which uses steel ball as grinding medium can crush and grind the materials to 35 mesh or finer adopted in open or close circuit the feed materials can be dry or wet they are broken by the force of impact and attrition that created by the different sized balls

China Small Wet Ore Grinding Ball Mill Gold Mining

China Small Wet Ore Grinding Ball Mill Gold Mining

Small wet ore grinding ball mill gold mining machine extraction equipment working principle the transmission device drives the cylinder to rotate materials and water are fed from the feeding end of the cylinder ores are ground into fine particles by the grinding of steel rods as well as the impact amp grinding of ores themselves

Effect Of Ball Size Distribution On Milling Parameters

Effect Of Ball Size Distribution On Milling Parameters

This dissertation focuses on the determination of the selection function parameters a and together with the exponent factors and describing the effect of ball size on milling rate for a south african coal a series of batch grinding tests were carried out using three loads of single size media ie 306 mm 388 mm and 492 mm

Ball Mills China Manufacturer  Home  Facebook

Ball Mills China Manufacturer Home Facebook

Ball mills china manufacturer 231 likes we supply ball mills for copper magnetite molybdenite zinc ore iron ore gold hematite fluorspar lead amp

Citeseerx  Modelling Of Mill Load For Wet Ball Mill Via

Citeseerx Modelling Of Mill Load For Wet Ball Mill Via

Citeseerx document details isaac councill lee giles pradeep teregowda abstractthe load of wet ball mill is a key parameter for grinding process which affects the productivity quality and energy consumption a new soft sensor approach based on the mill shell vibration signal is proposed in this paper as the frequency domain signal contains more evidently information than time domain

Ball Mill  Easystudypoint

Ball Mill Easystudypoint

Apr 01 2021 the ball mill machine is wide accustomed method cement salt product building material refractory material fertilizer ceramics and glass etc the ball mill also known as the rod mill will work in a dry manner or wet way you choose the operating way of a little ball mill machine according to your material and discharging way

Characterization Of Szegomilled Hemp Fibers

Characterization Of Szegomilled Hemp Fibers

The tumbling ball mill is one of the famous retention mills which has been used widely in both dry and wet grinding for size reduction in different type of applications over a wide range of particle sizes compared to other mills

China Laboratory Ball Mill Laboratory Ball Mill

China Laboratory Ball Mill Laboratory Ball Mill

China laboratory ball mill manufacturers select 2021 high quality laboratory ball mill products in best price from certified chinese ceramic ceramic product