Agglomerated particulate lignosulfonate
AssigneeBorregaard Industries Limited
InventorKåre Reknes
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Abstract
An agglomerated particulate lignosulfonate material may be made by introducing or forming lignosulfonate microparticles in a fluidized bed agglomerator, and introducing sufficient heated gas and lignosulfonate liquid in the agglomerator to convert the microparticles to lignosulfonate granules of enlarged size. The granules may have an average size of at least 0.1 mm, and may be used to make a dry-blended cement additive or oil well cement that may be dustless, easily poured and stored, and rapidly dissolved in water.
Claims37
A method for making a particulate material, which method comprises:
- a) introducing or forming lignosulfonate microparticles in a fluidized bed agglomerator;
- b) introducing heated gas and lignosulfonate liquid in the agglomerator;
- and
- c) enlarging the microparticles to form particulate material comprising non-comminuted water-soluble agglomerated lignosulfonate granules having an average size of at least 0.1 mm and consisting of lignosulfonate and optionally one or more cement adjuvants selected from the group consisting of other cement plasticizers, cement superplasticizers, cement retarders, cement accelerators, air-entraining agents, stabilizers, sedimentation reducers, silica powders, silica suspensions and silica sols.
Particulate material comprising non-comminuted water-soluble agglomerated granules having an average size of at least 0.1 mm and consisting of lignosulfonate and optionally one or more cement adjuvants selected from the group consisting of other cement plasticizers, cement superplasticizers, cement retarders, cement accelerators, air-entraining agents, stabilizers, sedimentation reducers, silica powders, silica suspensions and silica sols.
A method for making a cement product comprising dry-blending cement powder with particulate material comprising non-comminuted water-soluble agglomerated lignosulfonate granules having an average size of at least 0.1 mm and consisting of lignosulfonate and optionally one or more cement adjuvants selected from the group consisting of other cement plasticizers, cement superplasticizers, cement retarders, cement accelerators, air-entraining agents, stabilizers, sedimentation reducers, silica powders, silica suspensions and silica sols.
Particulate concrete plasticizer material comprising non-comminuted water-soluble agglomerated granules having an average size of at least 0.1 mm and comprising lignosulfonate and at least one cement adjuvant selected from the group consisting of other cement plasticizers, cement superplasticizers, cement retarders, cement accelerators, air-entraining agents, stabilizers, sedimentation reducers, silica powders, silica suspensions and silica sols.
Dependencies are inferred from the claim text.