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评价了用注水旋流器富集细粒铁矿石的可行性。讨论从铁矿石中分离细粒黏土矿物(包括大量的氧化铝和二氧化硅)的分选特性。根据精矿铁、氧化铝和二氧化硅的品位、铁的回收率以及氧化铝和二氧化硅的去除率讨论了关键变量(例如注水流量、截锥直径、沉砂嘴直径和溢流管直径)对富集结果的影响。通过16个试验(24)考察了各个单独变量和联合变量的影响效果。结果表明,在不同的试验条件下,用注水旋流器对含63.0%的铁,2.5%氧化铝和3.5%二氧化硅的细粒铁矿石进行分级,可以获得铁品位高于66.0%,氧化铝含量低于1.5%,二氧化硅含量低于2.0%的铁精矿。在特定的试验条件下,铁精矿铁的回收率大于88%,氧化铝的去除率高于80%,二氧化硅的去除率高于50%。虽然截锥直径、注水流量和沉砂嘴直径对氧化铝去除率有一定的影响,但溢流管的直径对分选指标影响最大。铁精矿的铁回收率和氧化铝的去除率受沉砂嘴直径和截锥直径的影响。注水流量对精矿的影响大小与截锥直径和沉砂嘴直径有关。
The feasibility of enriching fine iron ore with a water injection hydrocyclone was evaluated. Discusses the separation characteristics of fine-grained clay minerals (including large amounts of alumina and silica) from iron ore. Key variables (such as waterflood flow, frustum diameter, grit diameter, and overflow pipe diameter) were discussed based on grades of concentrate iron, alumina, and silica, iron recovery, and alumina and silica removal rates Effect on enrichment results. Sixteen experiments (24) examined the effects of individual variables and covariates. The results show that, under different experimental conditions, fine iron ore with 63.0% iron, 2.5% alumina and 3.5% silica can be classified by a hydrocyclone, and the iron grade is higher than 66.0% Iron concentrates with an alumina content of less than 1.5% and a silica content of less than 2.0%. Under specific test conditions, iron ore concentrate recovery is greater than 88%, alumina removal efficiency is greater than 80% and silica removal efficiency is greater than 50%. Although the diameter of truncated cone, water injection flow and grit diameter have a certain impact on the removal rate of alumina, the diameter of overflow pipe has the greatest influence on the sorting index. Iron concentrate iron recovery and alumina removal rate by the grit nozzle diameter and truncated cone diameter. The effect of water injection on the concentrate size and truncated cone diameter and diameter of grit nozzle.