Manufacturing a binder with high β belite content
AssigneeHConnect 2 GmbH
InventorsAnca Itul, Mohsen Ben Haha
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Abstract
The present invention relates to a method for manufacturing a binder with high β belite content comprising the steps: a) providing a starting material by selecting one raw material having a Ca/Si molar ratio of 1.5 to 2.5 or by mixing two or more raw materials to obtain a starting material with the Ca/Si molar ratio of 1.5 to 2.5; b) hydrothermal treatment of the starting material produced in step a) in an autoclave at a temperature of 100 to 300° C. and a retention time of 0.1 to 24 h, wherein the water/solids ratio is from 0.1 to 100 to provide an intermediate product; c) annealing the intermediate product obtained in step b) in a flash calciner at 620 to 630° C., wherein the retention time is 1-30 seconds.
Claims20
A method for manufacturing a binder with β belite content of at least 20% by weight comprising the steps:
- a) providing a starting material by selecting one raw material having a Ca/Si molar ratio of 1.5 to 2.5 or by mixing two or more raw materials to obtain a starting material with the Ca/Si molar ratio of 1.5 to 2.5;
- b) hydrothermal treatment of the starting material produced in step a) in an autoclave at a temperature of 100 to 300° C. and a retention time of 0.1 to 24 h, wherein the water/solid ratio is from 0.1 to 100 to provide an intermediate product;
- c) annealing the intermediate product obtained in step b) in a flash calciner at 620 to 630° C., wherein the retention time is 1-30 seconds.
Dependencies are inferred from the claim text.