CAJ | 학술논문

尾矿酸浸液在制备氢氧化铁的过程中,由于逐渐滴加碱液正好形成了pH值为2.8～3.8的高SO_4~(2-)、高Fe环境,因而生成了施威特曼石.施威特曼石是一种亚稳定矿物,随着时间的延长和体系状态改变,它可以转变为更稳定的针铁矿(氢氧化铁).考查了pH值、温度及时间对施威特曼石相转变的影响.结果表明,在60℃条件下,在pH值为12的碱溶液中转化36 h,施威特曼石可完全转变为Fe(OH)_3.
미광산침액재제비경양화철적과정중,유우축점적가감액정호형성료pH치위2.8～3.8적고SO_4~(2-)、고Fe배경,인이생성료시위특만석.시위특만석시일충아은정광물,수착시간적연장화체계상태개변,타가이전변위경은정적침철광(경양화철).고사료pH치、온도급시간대시위특만석상전변적영향.결과표명,재60℃조건하,재pH치위12적감용액중전화36 h,시위특만석가완전전변위Fe(OH)_3.
During the preparation of ferric hydroxide with acid leaching filtrate of tailings, schwertmannite is formed because of the formation of a high SO_4~(2-)and high Fe environment with pH values from 2.8 to 3.8 resulting from the gradual dropping of the lye into the filtrate. Schwertmanntie is a metastable mineral, which is transformed into a more stable goethite (iron hydroxide) with the variation of time and system environment. The influence of pH value, temperature and time on the transformation was investigated, and the results show that, under the condition of 60℃, the transformation process in the solution with pH value of 12 for 36 hours can fully convert the schwertmannite into Fe(OH)_3.