| 简介 |
A diatomaceous earth product may include diatomaceous earth having a loose weight density of less than about 14 lbs/ft3, and a stoichiometric ratio of alkali metal to iron and/or aluminum ranging from about 100% to about 400%. A diatomaceous earth product may include diatomaceous earth having a loose weight density of less than about 14 lbs/ft3, and a silica specific volume of at least about 3.2. A method for making a low loose weight density diatomaceous earth product may include providing a feed material comprising diatomaceous earth having a silica specific volume of at least about 3.5. The method may further include adding alkali flux to the feed material to achieve a combination having a stoichiometric ratio of alkali metal to iron and/or aluminum that ranges from about 100% to about 400%, calcining the combination at a temperature ranging from about 1, 600°F to about 2, 200°F. |
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