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METHOD FOR REDUCTION OF HEXAVALENT CHROMIUM
To solve such a problem that it is obliged to flush a chromium ore after pulverizing to the size regulated by environmental standard or the like in order to reduce the hexavalent chromium content in a large amount of slag generating when refining metal chromium from the chromium ore.SOLUTION: There is provided a method for reduction of the hexavalent chromium elution amount from a slag including a process 1 of pulverizing the slag including the hexavalent chromium and a process 2 of flushing the pulverized slag. The slag is pulverized into a size in which the hexavalent chromium elution amount accompanying pulverization does not increase even if the slag is further pulverized.SELECTED DRAWING: Figure 1
【課題】クロム鉱石から金属クロムを精錬する際に発生する大量のスラグ中の六価クロム含有量を低減するために、環境基準等で定められたサイズまで粉砕してから水洗することを余儀なくされていた。【解決手段】六価クロム含有スラグを粉砕する工程１と、該粉砕されたスラグを洗浄する工程２と、を含むスラグからの六価クロム溶出量を低減させる方法において、前記粉砕は、更に粉砕しても粉砕に伴う六価クロム溶出量が増加しないサイズとする。【選択図】図１
METHOD FOR REDUCTION OF HEXAVALENT CHROMIUM
To solve such a problem that it is obliged to flush a chromium ore after pulverizing to the size regulated by environmental standard or the like in order to reduce the hexavalent chromium content in a large amount of slag generating when refining metal chromium from the chromium ore.SOLUTION: There is provided a method for reduction of the hexavalent chromium elution amount from a slag including a process 1 of pulverizing the slag including the hexavalent chromium and a process 2 of flushing the pulverized slag. The slag is pulverized into a size in which the hexavalent chromium elution amount accompanying pulverization does not increase even if the slag is further pulverized.SELECTED DRAWING: Figure 1
【課題】クロム鉱石から金属クロムを精錬する際に発生する大量のスラグ中の六価クロム含有量を低減するために、環境基準等で定められたサイズまで粉砕してから水洗することを余儀なくされていた。【解決手段】六価クロム含有スラグを粉砕する工程１と、該粉砕されたスラグを洗浄する工程２と、を含むスラグからの六価クロム溶出量を低減させる方法において、前記粉砕は、更に粉砕しても粉砕に伴う六価クロム溶出量が増加しないサイズとする。【選択図】図１
METHOD FOR REDUCTION OF HEXAVALENT CHROMIUM
六価クロム低減方法
ISHIYAMA YUDAI (author) / OSHIMA TAKASHI (author) / OSAWA MASATO (author)
2021-08-05
Patent
Electronic Resource
Japanese
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