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Gold Science and Technology >

2020 , Vol. 28 >Issue 5: 771 - 777

DOI: https://doi.org/10.11872/j.issn.1005-2518.2020.05.158

Mining Technology and Mine Management

Comparison of Grinding Effect Between Steel Section and Steel Ball During Fine Grinding Stage of Ball Mill

  • Xudong WANG , 1 ,
  • Qingfei XIAO , 1, 2 ,
  • Qian ZHANG 1 ,
  • Sen YANG 1 ,
  • Shuai MA 1
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  • 1. School of Land and Resources Engineering，Kunming University of Science and Technology，Kunming 650093，Yunnan，China
  • 2. State Key Laboratory of Mineral Processing Science and Technology，Beijing 100070

Received date: 2019-09-23

  Revised date: 2020-06-12

  Online published: 2020-11-05

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Highlights

The particle size of the grinding products in the fine grinding section of a domestic mineral processing plant is uneven，and there are more coarse-grained and over-fine-grained grades.At the same time，the content of the grinding fineness -0.074 mm does not meet the standard.According to the current mill grinding process，combined with the nature of the ore itself in the concentrator，the grinding quality is improved through the grinding process.This paper uses the international standard sieve for particle size screening of the ore sampled uniformly，combined with the spherical diameter semi-theoretical formula to formulate the grinding plan，compare the grinding results，evaluate and select the best grinding plan.Laboratory test results and data analysis show that the grinding media system is Φ45×50∶Φ35×40∶Φ30×35∶Φ25×30=30∶20∶20∶30. Compared with the steel ball plan and the current plant plan，the overall steel section plan has an over-coarse level of 0.10 mm and a yield reduction of 0.73 percentage points and 5.42 percentage points，respectively，and an over-pulverization level of 0.010 mm and a yield reduction of 2.51 percentage points and 0.77 percentage points，respectively.The grinding fineness -0.074 mm content has increased by 1.75 percentage points and 5.33 percentage points respectively.The intermediate easy-selection grade 0.100~0.038 mm yield has increased by 1.96 percentage points and 5.57 percentage points，respectively，and the grinding technology efficiency has been improved by 3.54 percentage points and 8.14 percentage points，mill q -200 increased by 3.15% and 10.24%.According to the comparison of various grinding indexes，it can be concluded that the grinding method of the steel section in the grinding process is mainly based on the grinding and peeling effect，supplemented by the impact effect，which can effectively reduce the content of coarse-grained and super-fine-grained grades，and improve the qualified grain.The level of content reduces the difficulty of flotation.The increase of the efficiency of grinding technology shows the improvement of the quality of grinding products，and the increase of the mill q -200 shows the improvement of the production capacity of the mill’s unit effective volume.The above conclusions indicate that the steel segment is more suitable for fine grinding process，it improve the quality of grinding products，the production capacity of the mill and the efficiency of the enterprise.

Cite this article

Xudong WANG , Qingfei XIAO , Qian ZHANG , Sen YANG , Shuai MA . Comparison of Grinding Effect Between Steel Section and Steel Ball During Fine Grinding Stage of Ball Mill[J]. Gold Science and Technology, 2020 , 28(5) : 771 -777 . DOI: 10.11872/j.issn.1005-2518.2020.05.158

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矿产资源国情调查加快推进

中国自然资源报记者从10月26日在京举行的全国矿产资源国情调查技术培训北方片区会议上获悉，矿产资源国情调查工作在大部分省区得到实质性推进，22个省份已基本落实调查经费。

矿产资源国情调查工作是落实自然资源部“两统一”职责的重要基础性工作。2018年，自然资源部从部层面选择辽宁、黑龙江、安徽等9个省（区）12个矿种进行试点，为全面部署开展国情调查作技术准备。2020年以来，自然资源部推进矿产资源储量分类标准改革和矿产资源储量管理制度改革，为推动矿产资源国情调查创造了条件。2020年7月，全国矿产资源国情调查工作全面部署，9月调查工作全面实施。截至目前，全国大部分省份矿产资源国情调查进入实质性推进阶段。据最新统计，目前各省基本建立了省级自然资源主管部门、技术牵头单位、承担单位三位一体的调查组织架构；22个省份已基本落实调查经费，大部分省份已拨付到承担单位；27个省份不同程度地开展资料收集、储量数据库的清理和内业工作；7个省已开展部分外业调查。

自然资源部矿产资源保护监督司负责人在培训会上要求：一要适应新要求，做好与储量管理制度改革成果的衔接。矿产资源国情调查要严格按照新的储量分类标准体系和制度管理要求，做好衔接，避免造成家底数据出现空白和遗漏。二是认真把握、全面弄懂悟透实施方案和技术要求，要按照实施方案和技术要求的规定开展工作，全面清理矿产资源储量数据库，在此基础上实地核查要到位，要留痕，把信息数据充分反映出来。三是各省要以高度的责任感，按照部统一部署要求，结合各地实际抓紧推进工作，确保明年上半年全面开展外业调查，9月完成省级调查，10月底完成全国核查，12月完成汇总提交成果报告。四是要落实好国情调查工作进展的月报报告制度。五是各省抓紧组织各级矿产资源国情调查的技术培训。

(来源：中国自然资源报)

http://www.goldsci.ac.cn/article/2020/1005-2518/1005-2518-2020-28-5-771.shtml

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