Chemical sand fixing agent and preparation method thereof
A sand-fixing agent and chemical technology, which is applied in the field of new chemical sand-fixing agents, can solve the problems of poor aging resistance of water glass, poor sand-fixing effect, troublesome preparation, etc., and achieve good sand-fixing effect, convenient construction, and strong aging resistance.
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Embodiment 1
[0015] Embodiment 1: In terms of mass percentage, 0.1% sorbitol and 1.5% lithium carbonate are added to 48.1% water, and after stirring until it is completely dissolved, 50% water glass (modulus is 3.0) is added therein to fully React for 4 hours, then add 0.1% polyacrylamide and continue to react for 1.5 hours to obtain modified water glass, and finally add 0.2% sodium carboxymethylcellulose and stir evenly to obtain the sand-fixing agent of the present invention. The whole reaction process was carried out at normal temperature.
[0016] After research and testing: the sand mold sample made of this sand-fixing agent was aged for 7 days at room temperature, and its unconfined compressive strength was measured to be 0.34 MPa; aged at 70 degrees Celsius for 7 days, its unconfined compressive strength was measured to be 0.30 MPa; frozen at minus 20 degrees Celsius for 7 days, the unconfined compressive strength was measured to be 0.28 MPa. TGA test shows that the thermal weight ...
Embodiment 2
[0017] Embodiment 2: In terms of mass percentage, 0.08% sorbitol and 1.2% lithium carbonate are added to 58.42% water, and after stirring until it is completely dissolved, 40% water glass (modulus is 3.3) is added therein to fully React for 3 hours, then add 0.1% polyacrylamide and continue to react for 1 hour to obtain modified water glass, and finally add 0.2% sodium carboxymethylcellulose and stir evenly to obtain the sand-fixing agent of the present invention. The whole reaction process was carried out at normal temperature.
[0018] After research and testing: the sand mold sample made of this sand fixing agent was aged for 7 days at room temperature, and its unconfined compressive strength was measured to be 0.32 MPa; aged at 70 degrees Celsius for 7 days, its unconfined compressive strength was measured to be 0.28 MPa Pa; frozen at minus 20 degrees Celsius for 7 days, the unconfined compressive strength was measured to be 0.26 MPa. TGA test shows that the thermal weigh...
Embodiment 3
[0019] Embodiment 3: by mass percentage, 0.12% sorbitol and 1.8% lithium carbonate are added to 37.78% water, after stirring until it dissolves completely, then add 60% water glass (modulus is 2.8) to fully React for 5 hours, then add 0.1% polyacrylamide and continue to react for 2 hours to obtain modified water glass, and finally add 0.2% sodium carboxymethylcellulose and stir evenly to obtain the sand-fixing agent of the present invention. The whole reaction process was carried out at normal temperature.
[0020] After research and testing: the sand mold sample made of this sand fixing agent was aged at room temperature for 7 days, and its unconfined compressive strength was measured to be 0.33 MPa; aged at 70 degrees Celsius for 7 days, its unconfined compressive strength was measured to be 0.28 MPa; frozen at minus 20 degrees Celsius for 7 days, the unconfined compressive strength was measured to be 0.27 MPa. TGA test shows that the thermal weight loss is 8.6% at 0-700 de...
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Abstract
Description
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Application Information
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