Method for improving hydration activity of steel slag
An active, steel slag technology, used in cement production and other directions, can solve the problem of low hydration activity of steel slag, shorten the final setting time, improve the compressive strength, and ensure the effect of sorting.
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Embodiment 1
[0024] A method for improving the hydration activity of steel slag. The steel slag is processed into steel slag powder by grinding equipment, and then the RO phase is separated by gravity. The specific process is as follows:
[0025] The raw steel slag is crushed to less than 5mm through a rod mill, and after removing the metal iron from the material, it is ground in a disc mill or a vertical roller mill. The particle size of the steel slag powder is less than 65μm, so that the RO phase monomer mineral dissociation degree Reach over 80%. The steel slag powder passes through a magnetic iron remover to remove the metal iron particles dissociated from the grinding, and the steel slag powder is dispersed in an inert liquid medium or an air medium, and sieved with a sieve with a mesh size of about 30μm to 45μm. The coarse-grained products on the sieve are RO phase products; the fine-grained products under the sieve are active steel slag powder products.
Embodiment 2
[0027] A method for improving the hydration activity of steel slag. The steel slag is processed into steel slag powder by grinding equipment, and then the RO phase is separated by gravity. The specific process is as follows:
[0028] The raw steel slag is crushed to less than 5mm through a rod mill, and after removing the metal iron from the material, it is ground in a disc mill or a vertical roller mill. The particle size of the steel slag powder is less than 65μm, so that the RO phase monomer mineral dissociation degree Reach over 80%. The steel slag powder passes through the magnetic iron remover to remove the metal iron particles that have been ground and dissociated, and the steel slag powder is dispersed in a heavy liquid (such as diiodomethane, density 3.32g / cm 3 Etc.) or resuspension (a solid-liquid two-phase dispersion system composed of high-density solid particles and water, such as a two-phase dispersion system composed of ferrosilicon or magnetite and water, the mixin...
Embodiment 3
[0031] A method to improve the hydration activity of steel slag. The steel slag is processed into steel slag powder by grinding equipment, and then the RO phase is separated by gravity. The gravity separation is to separate the steel slag powder in a gravity field and a centrifugal field at a sedimentation rate Different size classification, the final settlement velocity of steel slag powder particles in the gravity field u 1 =d 2 (p s -p)g / (18μ), the sedimentation rate u of steel slag powder particles in the centrifugal field 2 =d 2 (p s -p)ω 2 r / (18μ). Where: d is the particle size; P s , P are the particle and air density respectively; μ is the air viscosity; ω is the angular velocity of the particle in the centrifugal field; r is the radius of rotation; g is the acceleration of gravity. The RO phase component has a large density and particle size, while the associated mineral density and particle size are small, the RO phase product with a large sedimentation rate, and the a...
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