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低频交变磁场对水中碳酸钙结晶过程的影响.pdf
Extra Edition ( 1) 2010 METALLURG ICAL EQU IPMENT 2010( 1) 许艳梅 ( 100029) , ; X_RD, , , , , , , 低频交变磁场 碳酸钙 结晶 软垢 Effects of aLowfrequencyTimevaryingMagnetic Field on the Formation ofCalcium CarbonateCrystal Xu Yanm ei ( BeijingM etallurgical Equ ipment Researc D esign Corporation L mi ited ofMCC G roup, Beijing 100029) ABSTRACT A selfdes igned water treatm ent system w it ig gradientm agnetic field as been estab lis ed to study t e effects of a lowfrequency tmi evaryingm agnetic field on t e formation of calcium carbonate crystal, t e cal cium carbonate precipitation m et od was used. Based on t e resu lts of t e X_RD and SEM analysis, its approved t at it is of t e capacity of prom oting calcium nuclearsform ation in t e early stage, t en restraining crystalgrow t later. A lso its ind icated t at t e com position of scale sam ple w ic ad been treated by m agnetic field is different from it in t e raw water. A ragonite is t e largest com position s are, m inmi um composition is t e calcite, w ic is easier for form ing soft scale t at is easily flus ed by liquid, and t e better result of t e scale rem oving and an tiscal ing are ac ieved. EYWORDS Lowfrequency tmi evarying m agnetic field Calcium carbonate C rystal Soft scale 1 , , CaCO 3 , 2 ( 2. 1 ), , , : NaH CO CaC I 3 2
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