Method for manufacturing a hydraulic binder
A technology of hydraulic binder and manufacturing method, applied in the field of hydraulic binder manufacturing of calcium aluminate compound, hydraulic binder, which can solve the problems of expensive, energy-consuming firing and grinding steps, etc.
Active Publication Date: 2021-08-27
IMERTECH SAS
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Problems solved by technology
However, the energy efficiency of grinding by conventional ball mills is only about 5%, and the vast majority of the energy used in this step is dissipated as heat
[0006]
The firing and grinding steps in the above-mentioned manufacturing methods are therefore very energy-intensive, and the methods used to manufacture known hydraulic binders are therefore expensive in terms of energy consumption
Method used
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[0168] A / Preparation of the hydraulic binder according to the invention
[0169] A1. Raw material
[0170] According to the process of the present invention, the raw materials listed in the following Tables 1-1 and 1-2 are used to produce calcium aluminate compounds LH1 to LH11.
[0171] Table 1-1
[0172]
[0173] Table 1-2
[0174]
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Abstract
The invention concerns a method for manufacturing a hydraulic binder comprising a calcium aluminate, which involves: a) providing a composition comprising a lime C source compound and an alumina source compound, the composition comprising at most 95% lime C and alumina, and at least 23% alumina, by weight relative to the total weight of dry matter of the composition; b) placing the composition provided in step a) in a moisture-saturated environment, at a hydration temperature of between 40 deg C and 150 deg C, so as to precipitate hydrated phases containing at least one aluminium oxide combined with a calcium oxide and with water; c) subjecting the precipitates obtained in step b) to a baking temperature of between 200 deg C and 1300 deg C, for at least 15 minutes.
Description
technical field [0001] The present invention generally relates to the field of production methods for the production of hydraulic binders. [0002] More specifically, the present invention relates to a hydraulic binder production method for producing a hydraulic binder comprising calcium aluminate. [0003] The present invention also relates to a calcium aluminate compound and the application of the calcium aluminate compound. Background technique [0004] Production methods for producing hydraulic binders comprising calcium aluminate are known, in particular the full melting process carried out in electric or reverberatory furnaces, and the sintering or frit process carried out in rotary furnaces. These known methods include a high-temperature firing step, that is to say at a temperature higher than 1300° C., so that the raw materials react with each other. However, this high temperature firing step results in high energy consumption. [0005] The aforementioned manufact...
Claims
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IPC IPC(8): C04B7/32
CPCC04B7/32C04B2103/0081C04B2103/0087C04B2103/54C04B2111/00637C04B2111/00767C04B2111/60C04B2111/70C04B2111/72Y02W30/91C04B7/4476B01J23/02C01F7/164C04B7/44C04B28/06C04B2111/0081C04B2111/0087
Inventor 埃尔韦·弗里达拉塔纳·索特罗斯-玛丽·米诺埃里克·拉尔诺迪
Owner IMERTECH SAS