| http://www.w3.org/ns/prov#value | - The resulting slurry is mixed in a mixing tank or other mixer such as primary mixer (27) and then passed into a mixing tank or other mixer such as conditioning mixer (32), wherein 5 parts of an aqueous solution of 2 weight % hydroxy ethylcellulose having viscosity of about 5000 cp at 25??? C. is added to the slurry with agitation.
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