METHOD OF ELECTROSTATICALLY RECOVERING PYRITE FROM RAW COAL von ARNO ZINGEVALD,DE, GYUNTER FRIKE,DE

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METHOD FOR SEPARATION POTASSIUM CHLORIDE OUT OF CARNALLITE ORE von ARNO ZINGEVALD,DE, GERD POJSHEL,DE, FRITTS KHAGEDORN,DE

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METHOD FOR STOCKPILING GRANULAR MATERIALS,IN PARTICULAR WASTES FROM PRODUCTION OF POTASSIUM FERTILIZERS von IOAKHIM KHENNING,DE, ARNO ZINGEVALD,DE, GOTTFRID BROJTIGAM,DE, GERKHARD BUDAN,DE

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METHOD AND APPARATUS FOR ELECTROSTATICALLY CONCENTRATING RAW POTASSIUM SALTS von ARNO ZINGEVALD,DE, IRING GAJZLER,DE, GYUNTER FRIKE,DE, RUDOLF KNAPPE,DE

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