Method of stabilizing silicate bonded sands

Details Method of stabilizing silicate bonded sands Method of stabilizing silicate bonded sands

B - Operations, Transporting

22

C

6/45

B22C 1/18 (2006.01)

Patent

CA 1200655

- 13 - ABSTRACT A method is disclosed for stabilizing silicate bonded sand particles against humidity degradation. The method comprises mixing sand particles with an aqueous solution containing a lithium modified sodium silicate of the formula XSiO2.M2O (where X is a number between 2.5 and 3.4 and where M is Na/Li in a ratio of 5:1 to 20:1), and precipitating silica glass from the mixture to form a rigidized body of sand particles bonded by the glass, preferably by use of thermal energy or microwave energy dehydration. The solution may have a solid content of 33-44% by weight of the solution.

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