Method For Producing a High Concentration Reactive Quicklime Slurry With Antiscalant Properties
AssigneeS.A. Lhoist Recherche et Developpement
InventorsDeborah Ballard, Kirsten Ballard
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Abstract
A method is shown for forming a high solids reactive lime slurry from quicklime. The timely addition of a carbohydrate and antiscalant polymer to slaking water provides desirable degree of control over the rate of reaction in which the heat of reaction is moderated to ensure the antiscalant polymer remains intact, thereby producing a fine quicklime slurry with low and stable viscosity.
Claims15
A method for producing a high concentration reactive quicklime slurry with antiscalant properties, the method comprising the steps of:
- combining a carbohydrate and an antiscalant with a source of water to form a batch of slaking water;
- adding a quantity of quicklime to the batch of slaking water to produce a resulting quicklime slurry, the quantity of carbohydrate present being selected to control the slaking reaction and accompanying temperature profile, to thereby produce a finer particle size slurry than would be achieved with a gypsum slurry alone, the finer particle size slurry also being characterized as having a low and stable viscosity.
A method for hydrating calcium oxide to form a lime slurry, the method comprising the steps of:
- substituting an antiscalant and a carbohydrate for gypsum as a slaking modifier, the quantity of carbohydrate being selected to control the heat of reaction of the slaking reaction and the accompanying temperature profile to thereby produce a finer more reactive high solids slurry that is visco stable for more than two weeks.
Dependencies are inferred from the claim text.