Method of processing waste sludge from wet phosphoric acid purification acid purification facilities
AssigneeUhde GmbH
InventorsMartin Hater, Fritz Meininghaus, Rudiger Scheel
Life of this patent
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Abstract
A method for processing waste sludge from wet phosphoric acid purification facilities wherein steelworks slag is separately ground, the ground slag then is force-mixed and granulated together with the waste sludge.
Claims10
A method of converting waste sludge of substantially no utility from wet phosphoric acid purification, having a relatively high, water-soluble phosphatic content to a useful fertilizer, said method comprising grinding steelworks slag having a relatively low phosphatic content, contacting said sludge with said ground slag, forming a fertilizer admixture from said sludge and slag having an averaged phosphatic content depending on the relative proportions or sludge and slag used.
A method of converting waste sludge of substantially no utility from wet phosphoric acid purification having a relatively high water-soluble phosphatic content to a useful fertilizer, said method comprising grinding a portion of steelworks slag having a relatively low phosphatic content, contacting said sludge with said ground slag and lumpy unground steelworks slag, forming a fertilizer admixture from said sludge and slag having an averaged phosphatic content depending on the relative proportions of sludge and slag used.
Dependencies are inferred from the claim text.