附件3铅锌矿资源合理开发利用“三率”最低指标要求（试行）铅锌矿资源合理开发利用“三率”是指铅锌矿山开采回采率、选矿回收率和综合利用率等三项指标，是评价铅锌矿山企业开发利用矿产资源效果的主要指标。经研究，确定其最低指标要求如下：一、“三率”指标要求（一）开采回采率。1.地下开采。依据矿体厚度和不同矿石类型的铅锌(当量)品位，铅锌矿的开采回采率确定为75～92%间共27个指标要求（详见表1）。其中，铅锌当量品位是指矿床铅锌品位与其伴生有价元素依据市场价格折算成铅锌品位之和，其计算方法铅锌当量品位是指矿床铅锌品位与其伴生有价元素依据市场格折算铅锌品位之和，其计算公式为：a当=ak+a1f1+a2f2+…+aifi式中：a当------铅锌当量品位，%；ak------主元素铅锌品位，%;a1a2…ai---有价副产元素品位，%；-1-f1f2…fi---有价副产元素的换算系数;f(换算系数)=某一共伴生矿产品产值/铅锌矿产品产值。表1铅锌矿体地下开采时开采回采率指标要求单位：%铅锌(当量)品位(硫化矿)铅锌(当量)品位(混合矿)铅锌(当量)品位(氧化矿)矿体厚度≥9.0%8892924.5%～9.0%808385≤4.5%758085≥11.5%8892926.0%～11.5%808385≤6.0%758085≥14.0%8892927.5%～14.0%808385≤7.5%758085≤5m5～15m≥15m2.露天开采。大型铅锌矿山的开采回采率不低于95%，对于中小型矿山或矿体形态变化大、矿体薄、矿岩稳固性差的矿山，其开采回采率不低于92%。-2-（二）选矿回收率。根据矿石类型、结构构造类型、品位、粒度等不同的影响因素，铅、锌矿选矿回收率应分别达到以下指标要求（详见表2、表3）。表2铅矿选矿回收率指标要求单位：%矿石类型结构构造类型硫化矿铅品位≥3混合矿铅品位≥3.6氧化矿铅品位≥593.090.092.089.090.087.089.086.590.087.589.086.587.585.086.584.081.078.580.578.078.576.578.075.588.087.085.584.585.585.083.082.077.076.075.074.01.5≤硫化矿铅品位＜32.5≤混合矿铅品位＜3.63≤氧化矿铅品位＜591.088.090.087.088.085.587.084.588.585.587.585.085.583.085.082.079.577.079.076.577.075.076.574.086.585.584.083.084.083.081.580.575.575.073.072.50.5≤硫化矿铅品位＜1.51.0≤混合矿铅品位＜2.51.5≤氧化矿铅品位＜389.086.588.085.586.584.085.583.086.584.085.583.084.081.583.080.578.075.577.075.075.573.075.072.584.584.082.081.082.081.580.079.074.073.072.071.0硫化矿铅品位<0.5混合矿铅品位<1.0氧化矿铅品位<1.585.083.084.582.083.080.082.079.583.080.582.079.580.578.079.577.074.572.574.071.572.570.071.569.581.080.078.578.079.078.076.575.571.070.069.068.0粗中粒细粒微细粒粗中粒细粒微细粒粗中粒细粒微细粒粗中粒细粒微细粒块状、粒状结构硫化矿条带状构造似层状、网脉状构造浸染状、交代结构块状、粒状结构混合矿条带状构造似层状、网脉状构造浸染状、交代结构块状、粒状结构氧化矿条带状构造似层状、网脉状构造浸染状、交代结构-3-表3锌矿选矿回收率指标要求单位：%矿石类型结构构造类型硫化矿锌品位≥5混合矿锌品位≥5.5氧化矿锌品位≥791.088.090.087.588.085.587.084.589.086.088.085.086.083.585.082.581.078.580.578.078.576.578.075.584.083.081.080.582.081.079.578.575.074.072.572.03≤硫化矿锌品位＜53.5≤混合矿锌品位＜5.55≤氧化矿锌品位＜789.086.588.085.586.584.085.583.087.084.586.083.584.582.083.581.079.577.079.076.577.075.076.574.084.584.082.081.082.582.080.079.575.575.073.072.51≤硫化矿锌品位＜31.5≤混合矿锌品位＜3.53≤氧化矿锌品位＜587.084.586.584.084.582.084.081.085.082.584.582.082.580.082.079.578.075.577.075.075.573.075.072.583.082.080.579.581.080.078.577.574.073.072.071.0硫化矿锌品位<1混合矿锌品位<1.5氧化矿锌品位<383.581.083.080.581.079.080.578.081.579.081.078.579.077.078.576.074.572.574.071.572.570.071.569.579.578.577.076.077.577.075.074.571.070.069.068.0粗中粒细粒微细粒粗中粒细粒微细粒粗中粒细粒微细粒粗中粒细粒微细粒块状、粒状结构硫化矿条带状构造似层状、网脉状...
