论文部分内容阅读
峨朗石灰石矿的溜井是斜溜井,田海石灰石矿的是垂直溜井,这两个矿的溜井系统中的溜口和料斗的布置型式是相同的。它们的井径大致相等,卸入矿石的粒度分布也相同。通过测定这两个溜井系统的混合特性,已经弄清了斜溜井所特有的混合对定量分析的影响。为了描述这部分的速度场,本文推荐了一个单一的参数线性函数。根据速度场计算出的混合特性曲线能与斜溜井其它种混合特性非常吻合。本文还推荐了描述漏斗流区速度场的公式,该式通用于倾斜溜井和垂直溜井这两个系统。因此,可以进一步推测具有较短溜井和峨朗矿未来溜井系统的混合特性。根据混合特性曲线,推测了溜井系统的有效容量。也讨论了溜井直径扩大的机理。根据假设的机理从理论上推测的井径与累计排矿量之间的关系同试验结果非常吻合。本文推导出了一个方程式,利用该方程式,可根据卸入矿石品位的梯形变化及混合特性,推测出排出矿石的品位变化。根据峨朗石灰石矿的实例研究,现已证明排矿品位的最大变化幅度取决于:1)单位批量卸入矿石时,各采区矿石的卸入顺序;2)单位批量的矿石量;3)溜井系统的混合特性。
The slippery wells in Elan limestone mine are inclined slops, and Tianhai limestone mine is a vertical slipway. The layout of the slips and hoppers in the two mine’s slip-in systems are the same. Their caliper is roughly equal, and the ore size distribution is also the same. By measuring the mixing characteristics of these two chute systems, it has been clarified that the effects of the churn-specific mixing on the quantitative analysis. In order to describe the velocity field in this part, we propose a single parametric linear function. The mixing characteristics calculated from the velocity field are in good agreement with other mixing characteristics of the inclined chute. This article also recommends a formula for describing the velocity field in the funnel flow zone, which is commonly used for both inclined and vertical slideways. Therefore, it can be further speculated that the mixing characteristics of the system with the shortened slippery well and the future slippery well system of Elang Mine. According to the mixing characteristic curve, it is estimated that the effective capacity of the chute system. Also discussed the mechanism of the diameter of the run-out well. According to the hypothetical mechanism, the relationship between the theoretically inferred well diameter and the accumulated discharge is in good agreement with the experimental results. This paper deduces an equation that uses this equation to predict grade changes in discharged ore based on the trapezoidal variation and mixing characteristics of the grade of the ore being discharged. According to the case study of Elan limestone mine, it has been proved that the maximum variation range of ore discharge grade depends on: 1) the order of unloading ore in each mining area when the unit is unloaded into ore; 2) the ore quantity per batch; 3) Mixing Characteristics of Chute Systems.