Secondary synthetic method for calcium sulphoaluminate mineral in Portland cement clinker
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United States of America Patent
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Mar 26, 2013
Grant Date -
Nov 15, 2012
app pub date -
Jul 15, 2010
filing date -
Nov 13, 2009
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Abstract
A method for secondarily synthesizing calcium sulphoaluminate mineral in Portland cement clinker is provided. The method includes adding gypsum into raw Portland cement, calcination, then heating twice to re-form calcium sulphoaluminate mineral that has decomposed at high temperature in the clinker. This method can increase the content of calcium sulphoaluminate mineral in the clinker. As a result, the advantages of the calcium sulphoaluminate mineral in the clinker may be obtained, such as improvement of the early stage performance and long-term performance of the cement clinker and increase in the quantity of mixture in the cement.
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