the role of clay dryers in industrial clay processing
While drying is largely used to prepare kaolin for shipment (it is estimated that drying is employed in more than 70% of total kaolin production.1), it is a necessity if the kaolin is bound for calcination – a thermal treatment commonly used in kaolin processing to reduce impurities, enhance brightness, and improve other properties.
Upon extraction, most bentonites exhibit a moisture content between 25 and 35% by weight. Depending on the moisture content of the specific deposit, mined bentonite may first be allowed to dry on-site naturally in order to reduce the burden on the dryer. Natural drying typically brings this down to less than 12%. Further drying brings the moisture content to around 8%. Bentonite clay requires careful consideration in drying, because over drying the material is likely to degrade its performance.²
Ball clays are favored for their high level of plasticity (they are also commonly called “plastic clays”). Ball clays are often blended with other less plastic clays such as kaolin in order to produce a product with optimized characteristics. Ball clays are commonly used in:
Mined ball clay typically exhibits a moisture content around 28%. It may be allowed to naturally dry and then sold as-is (this makes up a small portion of the ball clay market), or after natural drying, it may be further dried down to 8-10% moisture. For this type of clay, indirect drying, where the material does not come into direct contact with the drying medium, is employed.3 While ball clay is not always further dried before sale, it is recognized that drying generally produces a more refined product with improved characteristics.
As with bentonite clay, careful control over the drying process is important, as over drying leads to a reduction in product quality and subsequent value; if over dried, ball clay loses much of its plasticity, the primary characteristic for which it is employed.4
Fire clays cover a range of materials that exhibit optimal properties for use in high-temperature thermal applications such as refractories, furnace linings, crucibles, and other products that must withstand extreme temperatures.
Fire clays are almost always dried or calcined (or both) prior to any further processing. An initial natural drying step is common, with some clays requiring a mechanical drying step prior to further drying. Overdrying the clay should be avoided, as this leads to excessive dust.5
Dryers serve as one of the first and most critical steps to reaching the many end goals required by industrial clay producers and end markets. Industrial clay producers rely on drying systems to reduce shipping costs, improve handling characteristics, prepare the clay for downstream processing, and ensure clay materials meet their specific performance standards
Further, since rotary drums are already widely used for various objectives in mineral processing, and they boast simple operation, they offer easy adoption in most settings. Additional reasons for which rotary dryers are selected for clay processing applications include:
Rotary dryers offer a high level of customization, making them applicable for a wide range of materials – perfect for the diverse nature of the clay industry, allowing producers to tailor their dryer system to their exact needs.
One common customization is the use of a combustion chamber as a means of maintaining product integrity; the combustion chamber prevents contact between the clay being processed and the burner flame, reducing the potential for overdrying the product, which, as noted, often severely impacts the quality of the end product.
Rotary dryers have a well-earned reputation for reliability, typically performing efficiently for decades. This is in part a result of their rugged construction, but also rests on their simple design and operation, though producers should take care to select a quality rotary dryer manufacturer.
Depending on the specific clay source and pretreatment, variation in feedstock may or may not be a concern, and certainly, the more uniform the feedstock, the more uniform the end product. However, when variation in feedstock exists, be it in particle size distribution, moisture content, or otherwise, rotary dryers offer the best processing option; other dryer types such as fluid bed dryers require tight control over feedstock parameters to avoid frequent process upsets.
The variation in both clay sources and end products makes testing an important part of designing a commercial-scale clay dryer optimized for its specific application. FEECO often recommends pilot dryer testing in our Innovation Center.
Drying is an important step in the processing of industrial clays, whether it be to reduce costs associated with shipping, or to prepare the material for its end use. Rotary dryers provide industrial clay producers with a reliable, flexible drying system tailored to their specific drying requirements.
FEECO is the leading provider of custom rotary dryers, with all dryers designed around the specific characteristics of the material to be dried. We also offer tailored dryer testing programs and comprehensive parts and service support. For more information on our clay dryers, contact us today!
philippines economic medium kaolin chinaware ball mill
medium potteryfeldspar cone crusher in West Asia Sooso. large soft rock conecrusherin Teheran Iran West Asia.mediumtalc cone crusherinTabriz Iran West Asialargepotteryfeldsparball millinIran West Asialargepotteryfeldsparball millinIran WestAsia50thball millfor iron ore in Iran Processing material iron ore Discharging size 082mm Performance feedback The turning gearwheel adopts casting
If you have any problems about our product and service,please feel free to give your inquiry in
form below. We will reply you within 24 hours as soon as possible.Thank you!
economiclargekaolinwear parts ofball mill sellat a loss in Manila;economiclargekaolinwear parts ofball mill sellat a loss in Manila. ...Chinaware Ball Mill.Chinaware ball millis mainly used for the mixing and grinding of materials, and the fineness of the final products is even, thus saving motive power.
Mobile Crushing Station|Quezon CityEconomicPortable. Quezon CityEconomicPortable River SandAggregate Jaw CrusherPrice Our company is a heavy industry enterprise committed to producing heavy mining machinery. Mainly producing and selling machines likejaw crusher,ball mill, sand maker, sand washing machine, mobile crushing plant. Get Price
economic medium kaolinimpact crusher manufacturer in Robertsport. newkaolinball millin RobertsportLiberia Africa. NewCoal Aggregate Mobile JawCrusher InRobertsportLiberia Africa.Robertsportliberia africahigh quality largepotteryfeldspar aggregate jawcrushersell high qualitynew kaolinceramic sand kilnsellin monrovialiberiaafricakaolin for ceramic importers instantly …
Ball MillFor Cement Grinding In South Africacement. Quezon CityPhilippinesSoutheast AsiaMedium202043Quezon CityPhilippinesSoutheast Asiamediumcement clinkerchinaware ball mill sellat a lossnew silicateball millin Quezon CityPhilippinesSoutheast AsiaMachine Used Finished Product Of Copper QuezonPhilippines Ball millis the key equipment for grinding after the crushing process
economic mediumcoal ceramicball mill sellat a loss in Medan. DavaoPhilippines Southeast Asia new bluestone coalmill DavaoPhilippines Southeast Asia new bluestone coalmillsellat a lossTheDavaoCity Council endorsed the P25billion 300MW Circulating Fluidized Bed Combustion CFB coalfired power plant project of whollyowned AboitizPower subsidiary Therma South Inc TSI during its regular session
Buchanan tangible benefits environmentalkaolinceramicball millprice; ...Philippinestangible benefitsmediumbauxite ceramicball... Recife brazil south americatangible benefitssmall coal flotation cellsellrecife brazil south americatangible benefitssmall chrome ore high frequency screen for sale new aluminum hydroxideball millin
We haveeconomicsmallkaolinmining equipment for sale in Vlore,VloreAlbania Europe high end largekaolin mining equipment for sale,high endmediumsandstoneballmillin VloreAlbania EuropeAlbania officially the Republic of Albania is a country in Southeast Europe on the Adriatic and Apollonia was an important Greek colony on the Illyria n coast along the Adriatic Sea and one of the western
Genoaeconomicportable iron oreball mill sellit at a. lowpricenew gypsumballmill sellit at a bargain price lowpricenew gypsumballmillsellit at a bargainpricein Surabaya SurabayaIndonesia Southeast Asia highquality large 2020413 183SurabayaIndonesia Southeast Asia highquality largegypsumaggregate mobile jaw crusherpriceDavao PhilippinesSoutheast Asia high end smallferrosilicon aggregate
Abaeconomic medium kaolinmixersellBRIGHTON. AbaeconomicmediumkaolinmixersellJun 03, 2020· GlobalKaolinMarket is valued approximately USD 2.9 billion in 2019 and is anticipated to grow with a healthy growth rate of more than 5.5 % over the forecast period 2020-2027. Get Price