Purification method of waste iron oxide using alkali element

摘要

1. The technical field to which the invention described in the claims belongs;The present invention relates to a refining method capable of recycling waste iron oxide or the like generated in the process of wastewater treatment in a dyeing / pigment manufacturing plant and a textile industry as an iron oxide magnetic material.;2. Technical challenges to be solved by the invention;I want to use the waste iron oxide as a raw material of iron oxide magnetic material by appropriately refining it.;3. The point of the solution of the invention;After the iron oxide is mixed with the iron oxide, it is heated at a high temperature to react, and the reacted raw material is pulverized. Then, the iron oxide is separated by re-reacting in the acid aqueous solution, and then the separated iron oxide is washed / precipitated / separated and filtered / So that it can be utilized as a raw material of the material.;4. Important Uses of the Invention;For raw material of iron oxide magnetic material