INORGANICCHEMICALSINDUSTRY ›› 2016, Vol. 48 ›› Issue (10): 63-.
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LIANG Bo, HAN Feng-Lan
Online:
Published:
Abstract: To improve the added values of carbide slags,the effects of HCl dosage,extracting temperature,and CO2 flow rate on the morphology of calcium carbonate micro-particles prepared from carbide slags without crystal controlling agents were investigated.The as-prepared products were characterized by X-ray diffraction and FT-IR.The shapes of particles were ob- served by scanning electron microscopy.Results showed that HCl dosage and extracting temperature were important parame- ters for the control of morphology and shape of CaCO3.Calcium carbonate was changed from irregular calcite to partially regular vaterite with the increase of HCl content.The vaterite micro-particles can be prepared and the particle size was at 4~5 μm when the leaching agent was completely HCl.In addition, single vaterite micro-particles can be prepared from co-existed cal- cite and vaterite particles,when the extracting temperature was above 30 ℃ from 18 ℃.
Key words: leaching agent, extracting temperature, calcite, vaterite, carbide slag
CLC Number:
TQ132.32
LIANG Bo, HAN Feng-Lan. Crystal transformation of calcium carbonate micro-particles prepared from carbide slags[J]. INORGANICCHEMICALSINDUSTRY, 2016, 48(10): 63-.
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