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Patent Searching and Data


Title:
METHOD FOR MELTING TREATMENT OF PHOSPHORUS-CONTAINING SUBSTANCE AND MELTING FURNACE OPERATION METHOD
Document Type and Number:
WIPO Patent Application WO/2016/103474
Kind Code:
A1
Abstract:
Provided is an economical method for melting treatment of a phosphorus-containing substance, the method being capable of reducing the mixing of iron phosphide-containing metallic phosphorus compounds into the slag while limiting volatilization of phosphorus components. The method for melting treatment of a phosphorus-containing substance comprises: a pre-treatment step for adjusting the water content of a phosphorus-containing substance containing at least 0.04 wt% of phosphorus in terms of dry matter; a melting step for placing the phosphorus-containing substance from which water was removed in the pre-treatment step into a melting furnace and melting; and a cooling step for cooling and solidifying the slag produced in the melting step. Performing an iron compound-adding step for adding a divalent or trivalent iron compound to the phosphorus-containing substance in or near the pre-treatment step prevents volatilization of phosphorus components contained in the phosphorus-containing substance in the melting step while also limiting transfer of the phosphorus components to iron phosphide-containing metallic phosphorus compounds and trapping the phosphorus components in the slag.

Inventors:
SATO MAKOTO (JP)
YOSHIOKA YOUJI (JP)
HOSHO FUMIKI (JP)
OKADA MASAHARU (JP)
NOMURA NAOFUMI (JP)
Application Number:
JP2014/084595
Publication Date:
June 30, 2016
Filing Date:
December 26, 2014
Export Citation:
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Assignee:
KUBOTA KK (JP)
International Classes:
C02F11/10; B09B3/00; C02F11/12; F23G5/00; F23G7/00
Foreign References:
JP2000140895A2000-05-23
JP2001029998A2001-02-06
JP2003212615A2003-07-30
JPH06159640A1994-06-07
JP2006015173A2006-01-19
JP2015033691A2015-02-19
Other References:
See also references of EP 3239108A4
Attorney, Agent or Firm:
HASHIMOTO, KAORU (JP)
Hashimoto Scent (JP)
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