低温热处理对鲕状赤铁矿助磨效果的试验研究 study on aid grinding effects of low temperature preheat treatment on oolitic hematite.pdfVIP

２５ ５ Vol．２５ ，No．５ ２０１６ ５ CHINA MINING MAGAZINE May ２０１６ １ ，２ １ １ ，２ １ １ ， ， ， ， （１ ． ， ０６３００９ ； ２ ． ， ０６３００９） ： SRJX４-１３ ，，， ，。 ，４００℃ ９０min，，３ ．６９０１％ ４ ．０８１６％ ，－ ０ ．０３８mm５０ ．２５％ ６０ ．８８％ ；６８ ．７２ m３６ ．５７ m；， μ μ 。 ，，， 。 ： ； ； ； ； ： TD９５１ ： A ： １００４-４０５１（２０１６）０５-０１０２-０４ Study on aid grinding effects of low temperature preheat treatment on oolitic hematite １ ，２ １ １ ，２ １ １ NIU Fu-sheng ， ZHANG Xiao-liang ， ZHANG Jin-xia ， LIZhuo-lin ， ZOU Xuan （１ ． Collegeof Mining Engineering， North China University of Scienceand Technology ， Tangshan ０６３００９ ， China； ２ ． Key Laboratory of MineralDevelopment and Security Technology of Hebei Province ， Tangshan ０６３００９ ， China） Abstract ： Oolitic hematite is processed by a SRJX４-１３ box-type resistance furnace at lower temperature．Investigate the aid grinding effects of low temperature preheat treatment on oolitic hematite from several aspects，such as content of fine particles ，the average particle size， orosity rate and grinding p energy．The experimental results showed that porosity rate increased from ３ ．６９０１％ to ４ ．０８１６％ ； － ０ ．０３８mm content of grinding oreincreasedfrom ５０ ．２５％ to ６０ ．８８％ ；theaverageparticlesizeof grinding oreis reducedfrom ６８ ．７２ m to ３６ ．５７ m when theoolitic hematitewas treated ９０ min at ４００℃ ．The time μ μ was shorter to achieve the same fineness，if the ore was treated in low temperature．Therefore，low temperature preheat treatment can improve the