金属矿山
金屬礦山
금속광산
METAL MINE
2015年
8期
137-142
,共6页
铜银矿%高压辊终粉磨%机理分析%最小二乘法%MLA
銅銀礦%高壓輥終粉磨%機理分析%最小二乘法%MLA
동은광%고압곤종분마%궤리분석%최소이승법%MLA
Copper-silver ore%Final grinding by high pressure grinding rolls%Mechanism analysis%Least square method%MLA
武平某含铜银多金属矿铜品位为0．24%、银品位为85．00 g/t。分别对采用常规碎磨流程和高压辊终粉磨流程获得的产品进行浮选条件试验，在各自最佳的条件下进行铜银混合浮选—混合精矿铜银分离浮选闭路试验。结果表明，高压辊终粉磨产品的选矿指标优于常规碎磨产品。分别采用最小二乘法拟合常规碎磨产品和高压辊终粉磨产品的粒度分布曲线和金属量分布曲线，结果表明：高压辊终粉磨产品的适合浮选粒级产率、易回收粒级金属量分布率均大于常规碎磨产品；高压辊终粉磨产品的粒度分布方差与金属量分布方差均远小于常规碎磨产品。采用MLA矿石自动分析仪测定矿物单体解离度，结果表明，高压辊终粉磨产品中0．01~0．1 mm的易浮选粒级单体解离度远高于常规碎磨产品。因此，高压辊终粉磨产品选矿指标优于常规碎磨产品。试验结果为选矿领域降低磨矿作业能耗提供了一种新的思路和方法。
武平某含銅銀多金屬礦銅品位為0．24%、銀品位為85．00 g/t。分彆對採用常規碎磨流程和高壓輥終粉磨流程穫得的產品進行浮選條件試驗，在各自最佳的條件下進行銅銀混閤浮選—混閤精礦銅銀分離浮選閉路試驗。結果錶明，高壓輥終粉磨產品的選礦指標優于常規碎磨產品。分彆採用最小二乘法擬閤常規碎磨產品和高壓輥終粉磨產品的粒度分佈麯線和金屬量分佈麯線，結果錶明：高壓輥終粉磨產品的適閤浮選粒級產率、易迴收粒級金屬量分佈率均大于常規碎磨產品；高壓輥終粉磨產品的粒度分佈方差與金屬量分佈方差均遠小于常規碎磨產品。採用MLA礦石自動分析儀測定礦物單體解離度，結果錶明，高壓輥終粉磨產品中0．01~0．1 mm的易浮選粒級單體解離度遠高于常規碎磨產品。因此，高壓輥終粉磨產品選礦指標優于常規碎磨產品。試驗結果為選礦領域降低磨礦作業能耗提供瞭一種新的思路和方法。
무평모함동은다금속광동품위위0．24%、은품위위85．00 g/t。분별대채용상규쇄마류정화고압곤종분마류정획득적산품진행부선조건시험，재각자최가적조건하진행동은혼합부선—혼합정광동은분리부선폐로시험。결과표명，고압곤종분마산품적선광지표우우상규쇄마산품。분별채용최소이승법의합상규쇄마산품화고압곤종분마산품적립도분포곡선화금속량분포곡선，결과표명：고압곤종분마산품적괄합부선립급산솔、역회수립급금속량분포솔균대우상규쇄마산품；고압곤종분마산품적립도분포방차여금속량분포방차균원소우상규쇄마산품。채용MLA광석자동분석의측정광물단체해리도，결과표명，고압곤종분마산품중0．01~0．1 mm적역부선립급단체해리도원고우상규쇄마산품。인차，고압곤종분마산품선광지표우우상규쇄마산품。시험결과위선광영역강저마광작업능모제공료일충신적사로화방법。
There is 0. 24% copper and 85. 00 g/t silver in a copper silver polymetallic ore from Wuping. On the basis of flotation conditioning experiments on conventional crushing-grinding process ( CCG) products and final high pressure grinding roller(HPGR) grinding system products respectively,closed-circuit flotation tests were conducted at optimum copper and silver bulk flotation-separation of copper from silver conditions, respectively. Results indicated that, beneficiation index on final HPGR grinding system is better than that of CCG. Particle size distribution curve and metal volume distribution curve for both CCG process and final HPGR grinding system were analyzed by least square method. Results indicated that final HPGR grind-ing system products were higher than that of CCG process in the yield of suitable flotation fraction and easily to be recycled metal quantity;variance on particle size distribution and metal quantity distribution of final HPGR grinding system is much smaller than that of CCG process. Liberation degree of valuable minerals analyzed by MLA( Mineral Liberation Analyzer) show that:liberation degree of suitable flotation fraction(0. 01~0. 1 mm) by final HPGR grinding system is much higher than that of CCG process. Thus,separation indexes of final HPGR grinding system is much better than the CCG process. The experiments results provide a new clue or method for reduce energy consumption of grinding in mineral processing fields.
