자원리싸이클링 (Resources Recycling)
- 제5권4호
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- Pages.32-41
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- 1996
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- 2765-3439(pISSN)
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- 2765-3447(eISSN)
$CaCl_2-Na_2CO_3-H_2O$ 반응계에서 침강성탄산칼슘의 성상에 영향을 주는 인자에 관하여
Factors Affecting the Property of $CaCO_3$ Precipitated from $CaCl_2-Na_2CO_3-H_2O$ System
- Song, Young-Jun (Dept. of Mining & NMineral Eng., Inha University) ;
- Park, Charn-Hoon (Dept. of Mining & NMineral Eng., Inha University) ;
- Cho, Dong-Sung (Dept. of Mining & NMineral Eng., Inha University)
- 발행 : 1996.12.01
초록
본 연구는
The objective of this study was to investigate the facton affecting the property of CaCO, farmed from CaClz-Na,CO,-HiOsystem. The effcct of the concentmtlon of reaclants, impurity, the pH of reaction, the addition of sccd crystal, and injectingvelocity af reaclant solution an thc yield oI CaCO; polymorphs. parlide size and whiteness of CaCO, were investigated. Thcmqor resulls are ;o fallows; I The optimum concentratinn of reildilnts for forming vaterlte and aragonite is the range of 0.1-1.0 mol/l, when the yicld of vittcrite and araga~nles howed 7542% and XU-90%. respedively. 2. Among thc composition of impunticscontained h limestone, Fe' decrease the wh~tcness nf CaCO;. md Mg" increase the yield of aragonite. 3. The pHrange of vaterite and aragonite are formed with high yield is 8-11, and Calcite is famed in pH 6-8 with big particle size of 1over and in pH 11-13 with small particle size of I under. 4. The yicld of calcite and aragonite was increased by addingthc seed cryst.al nf itself.d cryst.al nf itself.
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