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PRODUCTION METHOD OF BENTONITE MOLDED BODY, DRYER, AND DRYING METHOD
PROBLEM TO BE SOLVED: To provide a method for producing a bentonite molded body in which drying shrinkage is allowed to proceed under drying rate conditions according to particle size of pellets, and to provide a dryer and a drying method.SOLUTION: The production method of a bentonite molded body comprises a drying step where pellets are allowed to dry and shrink by feeding dry air having a low relative humidity into a cylindrical vessel 12 from one end side in the axial direction of the cylindrical vessel 12 and discharging passing air from the other end to outside, while rotating and mixing pellets to be dried, charged inside the cylindrical vessel 12 arranged horizontally, by rotating the vessel around its axis. The drying conditions when drying by the drying step is set so that a drying rate condition for the pellets, v D, becomes 80 or less, where an average size of the pellet and a moisture content are denoted by D (mm) and an actual value, respectively, and a rate of water content decrease, v (1/Hr), is taken as a value calculated by v=(w-w)/t from a drying time, t (Hr), from an initial water content of wto a water content win a course of drying.SELECTED DRAWING: Figure 7-1
【課題】ペレットの粒径に応じた乾燥速度条件にて乾燥収縮を進めるベントナイト成形体の製造方法、乾燥装置および乾燥方法を提供する。【解決手段】水平に配置した円筒型容器１２を軸周りに回転することで内部に装てんされた乾燥対象のペレットを回転混合させながら、円筒型容器１２の軸方向の一端側から相対湿度の小さい乾燥空気を円筒型容器１２の内部に送入し、他端側から通過空気を外部に排出することでペレットを乾燥収縮させる乾燥工程を有し、ペレットの平均直径をＤ（ｍｍ）で、含水比を実数値で表して、乾燥工程によって乾燥する際の乾燥条件を、初期含水比ｗ０と乾燥途中の含水比ｗ１に至る乾燥時間ｔ（Ｈｒ）の値からｖ＝（ｗ０−ｗ１）／ｔで算出した値を含水比低下速度ｖ（１／Ｈｒ）とした場合に、ペレットの乾燥速度条件ｖ・Ｄ３が８０以下となるような乾燥速度条件にするようにする。【選択図】図７−１
PRODUCTION METHOD OF BENTONITE MOLDED BODY, DRYER, AND DRYING METHOD
PROBLEM TO BE SOLVED: To provide a method for producing a bentonite molded body in which drying shrinkage is allowed to proceed under drying rate conditions according to particle size of pellets, and to provide a dryer and a drying method.SOLUTION: The production method of a bentonite molded body comprises a drying step where pellets are allowed to dry and shrink by feeding dry air having a low relative humidity into a cylindrical vessel 12 from one end side in the axial direction of the cylindrical vessel 12 and discharging passing air from the other end to outside, while rotating and mixing pellets to be dried, charged inside the cylindrical vessel 12 arranged horizontally, by rotating the vessel around its axis. The drying conditions when drying by the drying step is set so that a drying rate condition for the pellets, v D, becomes 80 or less, where an average size of the pellet and a moisture content are denoted by D (mm) and an actual value, respectively, and a rate of water content decrease, v (1/Hr), is taken as a value calculated by v=(w-w)/t from a drying time, t (Hr), from an initial water content of wto a water content win a course of drying.SELECTED DRAWING: Figure 7-1
【課題】ペレットの粒径に応じた乾燥速度条件にて乾燥収縮を進めるベントナイト成形体の製造方法、乾燥装置および乾燥方法を提供する。【解決手段】水平に配置した円筒型容器１２を軸周りに回転することで内部に装てんされた乾燥対象のペレットを回転混合させながら、円筒型容器１２の軸方向の一端側から相対湿度の小さい乾燥空気を円筒型容器１２の内部に送入し、他端側から通過空気を外部に排出することでペレットを乾燥収縮させる乾燥工程を有し、ペレットの平均直径をＤ（ｍｍ）で、含水比を実数値で表して、乾燥工程によって乾燥する際の乾燥条件を、初期含水比ｗ０と乾燥途中の含水比ｗ１に至る乾燥時間ｔ（Ｈｒ）の値からｖ＝（ｗ０−ｗ１）／ｔで算出した値を含水比低下速度ｖ（１／Ｈｒ）とした場合に、ペレットの乾燥速度条件ｖ・Ｄ３が８０以下となるような乾燥速度条件にするようにする。【選択図】図７−１
PRODUCTION METHOD OF BENTONITE MOLDED BODY, DRYER, AND DRYING METHOD
ベントナイト成形体の製造方法、乾燥装置および乾燥方法
ISHII TAKU (author) / ISHII SO (author)
2016-05-19
Patent
Electronic Resource
Japanese
IPC:
B28B
Formgeben von Ton oder anderen keramischen Stoffzusammensetzungen, Schlacke oder von Mischungen, die zementartiges Material enthalten, z.B. Putzmörtel
,
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
/
C04B
Kalk
,
LIME
/
G21F
Schutz gegen Röntgenstrahlung, Gammastrahlung, Korpuskularstrahlung oder Teilchenbeschuss
,
PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT
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