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在需要迅速求出精鑛中金屬的回收率和其他选鑛指標時,可採用圖解法。在选鑛廠內確定各班工作指標,評價各個选鑛設備以及在某些其他情况下皆可採用此法。 圖解法的原理非常簡單。精鑛中金屬的回收率ε根據眾所週知的公式求得: ε=γβ/α, 式中: γ——精鑛產出率(以分數論): β——精鑛品位(％); α——原鑛品位(％);这一公式也可换成下面的形式: ε/γ=β/α或者用圆解法——用两個相似三角形表示(第一圖)
In the need to quickly find the concentrate recovery rate of metal and other mineral processing indicators, the diagram can be used. In the concentrator to determine the working indicators of each class, evaluation of various mineral processing equipment and in some other cases can be used this method. The principle of graphic method is very simple. The recovery of the metal in the concentrate, ε, is found according to the well-known formula: ε = γβ / α, where: γ - concentrate yield (in terms of fraction): β - concentrate grade (% - ore grade (%); this formula can also be replaced by the following form: ε / γ = β / α or by circular solution - with two similar triangles (first figure)