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Various Grade Sodium Bentonite/Calcium Bentonite Price of Made in China??
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Introduction
Bentonite?is?an?absorbent?aluminium?phyllosilicate,?in?general,?impure?clay?consisting?mostly?of?
montmorillonite.?There?are?different?types?of?bentonites,?and?their?names?depend?on?the?
dominant?elements,?such?as?potassium?(K),?sodium?(Na),?calcium?(Ca),?and?aluminum?(Al).?As?noted?
in?several?places?in?the?geologic?literature,?there?are?some?nomenclatorial?problems?with?the?
classification?of?bentonite?clays.?Bentonite?usually?forms?from?weathering?of?volcanic?ash,?most?
often?in?the?presence?of?water.?However,?the?term?bentonite,?as?well?as?a?similar?clay?called?t
onstein,?has?been?used?for?clay?beds?of?uncertain?origin.?For?industrial?purposes,?two?main?
classes?of?bentonite?exist:?sodium?and?calcium?bentonite.?In?stratigraphy?and?tephrochronology,?
completely?devitrified?(weathered?volcanic?glass)?ash-fall?beds?are?commonly?referred?to?as?K-bentonites?when?the?dominant?clay?species?is?illite.?Other?common?clay?species,?and?sometimes?
dominant,?are?montmorillonite?and?kaolinite.?Kaolinite-dominated?clays?are?commonly?referred?to?as?tonsteins?and?are?typically?associated?with?coal.
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Bentonite?has?a?big?expansion?after?meets?water,?has?a?good?colloidal?nature,?
can?increase?the?viscosity?of?suspension?in?the?drilling?mud?when?used,?can?increase?
the?lubrication?of?drilling,?cleaning?the?debris?during?drilling,?as?well?as?for?the?rig-freeing?agent.?So?which?is?widely?used?in?complex?geological?formation?drilling.
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To?be?suitable?for?lower?solid?mud,?has?clear?action?on?stop?falling?anything?from?caving?and?stop
up?leak,?it?has?good?close?water?base?of?interchangeability,?thixotropy,?lubrication,?dilatancy,?
suspension?property?and?similar?to?white?powder,?it?is?also?or?be?used?for?oil?and?gas?well?
drilling?and?civil-engineering?include?applied?drilling?fluid?system,?applied?fluid?solutions?
for?diaphragm?walls?and?piles,?lubrication?fluids?for?micro?tunneling?or?pipe?jacking,?drilling?
fluids?for?water?well,?exploration?and?mining,?fluids?solution?for?shield?tunneling.
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