Methodology for determining rom size distribution

Q3 Earth and Planetary Sciences

Rem-Revista Escola De Minas Pub Date : 2014-12-01 DOI:10.1590/0370-44672014670184

C. Silva, V. C. G. Souza, J. Koppe

{"title":"Methodology for determining rom size distribution","authors":"C. Silva, V. C. G. Souza, J. Koppe","doi":"10.1590/0370-44672014670184","DOIUrl":null,"url":null,"abstract":"A methodology to determine the size distribution curve of the ROM was developed in a Brazilian iron ore mine. The size of the larger fragments was determined taking photographs and setting the scale of the images to analyze their dimensions (length of their edges and areas). This was implemented according to a specific protocol of sampling that involves split and homogenization stages in situ of a considerable quantity of ore (about 259 metric tonnes). During the sampling process, larger fragments were separated and smaller size material was screened. The methodology was developed initially in order to preview the performance of a primary gyratory crusher that is fed directly from trucks. Operational conditions of the equipment such as closed and open-side settings could be adjusted previously, obtaining different product size distributions. Variability of size of the fragments affects subsequent stages of crushing and can increase circulating load in the circuit. This leads to a decrease of productivity or recovery of the ore dressing. The results showed insignificant errors of accuracy and reproducibility of the sampling protocol when applied to friable itabirite rocks.","PeriodicalId":54498,"journal":{"name":"Rem-Revista Escola De Minas","volume":"3 1","pages":"405-412"},"PeriodicalIF":0.0000,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Rem-Revista Escola De Minas","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1590/0370-44672014670184","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Earth and Planetary Sciences","Score":null,"Total":0}

引用次数: 0

Abstract

A methodology to determine the size distribution curve of the ROM was developed in a Brazilian iron ore mine. The size of the larger fragments was determined taking photographs and setting the scale of the images to analyze their dimensions (length of their edges and areas). This was implemented according to a specific protocol of sampling that involves split and homogenization stages in situ of a considerable quantity of ore (about 259 metric tonnes). During the sampling process, larger fragments were separated and smaller size material was screened. The methodology was developed initially in order to preview the performance of a primary gyratory crusher that is fed directly from trucks. Operational conditions of the equipment such as closed and open-side settings could be adjusted previously, obtaining different product size distributions. Variability of size of the fragments affects subsequent stages of crushing and can increase circulating load in the circuit. This leads to a decrease of productivity or recovery of the ore dressing. The results showed insignificant errors of accuracy and reproducibility of the sampling protocol when applied to friable itabirite rocks.

查看原文本刊更多论文

确定空间大小分布的方法学

以巴西某铁矿为研究对象，提出了一种确定ROM尺寸分布曲线的方法。较大碎片的大小是通过拍照确定的，并设置图像的比例来分析它们的尺寸(边缘和面积的长度)。这是根据特定的采样协议实施的，该协议涉及相当数量的矿石(约259公吨)的原位分裂和均质阶段。在取样过程中，较大的碎片被分离，较小尺寸的材料被筛选。该方法最初是为了预览直接从卡车进料的初级旋回破碎机的性能而开发的。可以预先调整设备的运行条件，如关闭和打开侧设置，从而获得不同的产品尺寸分布。碎块大小的变化会影响破碎的后续阶段，并会增加循环负荷。这将导致选矿效率或回收率的降低。结果表明，该方法在易碎橄榄岩取样时精度和重现性误差不显著。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Rem-Revista Escola De Minas 工程技术-工程：土木

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： REM – International Engineering Journal (antigua REM – Revista Escola de Minas) es la primera revista técnica de Sudamérica. Fue fundada en enero de 1936 por los estudiantes de la Escuela de Minas de Ouro Preto y desde entonces se ha especializado en la publicación de artículos en las áreas de la Ingeniería Civil, Geología, Metalurgia y Materiales y, Minería y Mecánica y Energía. Su objetivo es servir como un medio de publicación para los trabajos técnicos y científicos originales de investigadores nacionales y extranjeros en esas áreas. Contribuciones originales (artículos y cartas) son aceptadas. Artículos de revisión dependen de la invitación y/o análisis de los Editores. El envío de artículos para su publicación implica que el trabajo no ha sido publicado previamente, que no está siendo presentado para su publicación en otra revista y no se publicará en otro lugar, en la misma forma, sin el permiso, por escrito, de los Editores/Autores.