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Minerals
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Experimental and Numerical Studies of Mineral Comminution: 2nd Edition
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Experimental and Numerical Studies of Mineral Comminution: 2nd Edition

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Processing and Extractive Metallurgy".

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 5465

Special Issue Editors

Prof. Dr. Josep Oliva

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Guest Editor
Departament d’Enginyeria Minera, Industrial i TIC, Universitat Politècnica de Catalunya, Av. Bases de Manresa, 08242 Manresa, Spain
Interests: mineral processing; comminution; modeling
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Hernán Anticoi

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Guest Editor
Departament d’Enginyeria Minera, Industrial i TIC, Universitat Politècnica de Catalunya Barcelona Tech, Av. Bases de Manresa 61-63, 08242 Manresa, Spain
Interests: mineral processing; comminution; modeling; energy optimization; pollution remediation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Comminution is the biggest energy-consuming operation in mineral processing. The aim is to liberate locked minerals in order to provide the best conditions for further separation units. If liberation is not enough, the separation processes will be inefficient.

Experimental studies on mineral comminution are essential to understand how a mineral breaks and what the particle size distribution of the products will be after this breakage process. In this regard, experimental studies and numerical development take a leading role in defining comminution processes. With this information, industrial comminution may be optimized using particle size distribution sensors and advanced control systems with artificial intelligence. If we wish to apply all of these technologies, we must know the breakage process linked with the parameter process, and experimental and numerical studies allow us to collect these data.

This Special Issue aims to collect new work in this field and to disseminate knowledge around the world so as to advance this area of mineral processing.

Prof. Dr. Josep Oliva
Prof. Dr. Hernán Anticoi
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Minerals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • comminution
  • modeling
  • crushing
  • grinding
  • liberation
  • optimization
  • energy saving

Related Special Issues

Published Papers (5 papers)

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Research

13 pages, 4455 KiB  
Article
Effect on Fine Particles Output Characteristics of Ceramic Ball Grinding
by Jiaqi Tong, Caibin Wu, Yihan Wang, Jingkun Tian, Zheyang Li, Feng Xie, Xin Yao and Guisheng Zeng
Minerals 2023, 13(11), 1416; https://doi.org/10.3390/min13111416 - 07 Nov 2023
Viewed by 800
Abstract
Steel balls as traditional grinding media are prone to excessive fines generation and high energy consumption. Therefore, in light of this problem, the authors investigated another media—ceramic balls based on the output characteristics of fine particles. This study discusses the effect of ceramic [...] Read more.
Steel balls as traditional grinding media are prone to excessive fines generation and high energy consumption. Therefore, in light of this problem, the authors investigated another media—ceramic balls based on the output characteristics of fine particles. This study discusses the effect of ceramic balls on the change of the particle size distribution, zero-order output characteristics, micro-strain, and collision energy in ground products. The results showed that for −10 μm particle size, ceramic balls have a smaller production rate than steel balls. In addition, when the filling rate of ceramic balls is 40%, the yield of −10 μm is reduced compared to steel balls. Therefore, ceramic balls greatly reduced the overgeneration of fines. Additionally, the micro-strain rate of ceramic ball grinding with time is 67% lower than that of steel ball grinding. Furthermore, ceramic balls cannot only mitigate excessive fines generation but also effectively reduce energy consumption. Full article
(This article belongs to the Special Issue Experimental and Numerical Studies of Mineral Comminution: 2nd Edition)
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17 pages, 4405 KiB  
Article
Ceramic Grinding Kinetics of Fine Magnetite Ores in the Batch Ball Mill
by Chengfang Yuan, Caibin Wu, Li Ling, Xin Yao, Zheyang Li, Feng Xie and Jingkun Tian
Minerals 2023, 13(9), 1188; https://doi.org/10.3390/min13091188 - 10 Sep 2023
Viewed by 936
Abstract
Aiming to reveal the kinetic characteristics of ceramic ball grinding of fine magnetite comprehensively, two types of ceramic balls ground with the same filling rate and total weight as steel balls were researched. The results show that the breakage rate of ceramic ball [...] Read more.
Aiming to reveal the kinetic characteristics of ceramic ball grinding of fine magnetite comprehensively, two types of ceramic balls ground with the same filling rate and total weight as steel balls were researched. The results show that the breakage rate of ceramic ball grinding is only half of that of steel ball grinding with the same media filling rate. With the same total media weight and a feed size less than 0.212 mm, the breakage rate of the ceramic ball grinding approaches the steel ball grinding and is 17.14% higher than that of the steel ball grinding. The main crushing form of magnetite changed from impact to abrasion in ceramic ball grinding compared with steel ball grinding, which significantly affected the value of the zero-order output constant a. The shift indirectly led to a very different character of the variation ing the parameter β, related to the fines generation rate in the cumulative distribution function of the ceramic ball grinding compared to the steel ball grinding. Therefore, ceramic grinding with a high ball-filling rate can greatly save on energy consumption under the premise of meeting normal production. Full article
(This article belongs to the Special Issue Experimental and Numerical Studies of Mineral Comminution: 2nd Edition)
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12 pages, 3279 KiB  
Article
Effect of Intensive Abrasion Breakage on Secondary Ball Mills for Magnetite
by Chengfang Yuan, Caibin Wu, Li Ling, Zheyang Li, Feng Xie, Xin Yao and Yihan Wang
Minerals 2023, 13(6), 713; https://doi.org/10.3390/min13060713 - 23 May 2023
Cited by 1 | Viewed by 1493
Abstract
In order to investigate the breakage behavior of the feed in industrial secondary ball mills, the breakage characteristics of fine magnetite were analyzed. Magnetite particle breakage produces a bimodal particle size distribution that is consistent with the typical breakage characteristics of abrasion. The [...] Read more.
In order to investigate the breakage behavior of the feed in industrial secondary ball mills, the breakage characteristics of fine magnetite were analyzed. Magnetite particle breakage produces a bimodal particle size distribution that is consistent with the typical breakage characteristics of abrasion. The secondary ball mill can increase the surface area by reducing the diameter of steel balls to enhance the abrasion. Industrial application results show that after the abrasion of the secondary ball mill for grinding magnetite was enhanced, the circulating load of the grinding-classification system dropped by 29.90% and the specific energy of the secondary ball mill decreased by 39.14%. At the same time, the consumption of steel balls also dropped from 0.17 kg/t to 0.13 kg/t, a decrease of up to 20%. It should be noted that the reduction in the ball diameter should follow certain rules because if the energy of a single collision is lower than the critical breaking energy of the particles, the grinding process will be affected and thus have counterproductive effects. Full article
(This article belongs to the Special Issue Experimental and Numerical Studies of Mineral Comminution: 2nd Edition)
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15 pages, 4462 KiB  
Article
Impact Crushing Characteristics and Relationship between Multicomponent Complex Ore and Its Component Minerals
by Jinlin Yang, Pengyan Zhu, Hengjun Li, Zongyu Li, Xingnan Huo and Shaojian Ma
Minerals 2023, 13(5), 676; https://doi.org/10.3390/min13050676 - 15 May 2023
Cited by 1 | Viewed by 919
Abstract
Based on the JK Drop Weight test and principle of selective crushing, a multicomponent complex ore with its component minerals, i.e., pyrrhotite, sphalerite, and quartz, was used to explore the impact crushing characteristics and relationship between the complex ore and its component minerals. [...] Read more.
Based on the JK Drop Weight test and principle of selective crushing, a multicomponent complex ore with its component minerals, i.e., pyrrhotite, sphalerite, and quartz, was used to explore the impact crushing characteristics and relationship between the complex ore and its component minerals. Results show that the order of impact crushing resistance is quartz > pyrrhotite > ore > sphalerite. The particle-size-distribution characteristic curve of ore crushing products is always “sandwiched” between the curves of pyrrhotite, sphalerite, and quartz within the same feed-size range. When the particle size is −63 + 53, −45 + 37.5, −31.5 + 26.5, and −22.4 + 19 mm, the component mineral pyrrhotite has a negative effect on the impact crushing of ore, while the component mineral sphalerite has a positive effect. When the particle size is −16 + 13.2 mm, the component mineral pyrrhotite has a positive effect on the crushing effect of the ore, while the component mineral sphalerite has a negative effect. The component mineral quartz always has a negative effect on the impact crushing effect of ore in all the studied particle sizes. Full article
(This article belongs to the Special Issue Experimental and Numerical Studies of Mineral Comminution: 2nd Edition)
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9 pages, 1934 KiB  
Article
Study on Quantitative Separation Method of Grinding Characteristics of Multi-Component Complex Ore
by Jinlin Yang, Zongyu Li, Hengjun Li, Pengyan Zhu, Xingnan Huo and Shaojian Ma
Minerals 2023, 13(4), 517; https://doi.org/10.3390/min13040517 - 06 Apr 2023
Viewed by 987
Abstract
Based on batch grinding method and normalization idea, a conical ball mill is used and a quantitative separation method of grinding characteristics of multi-component complex ore is proposed. The results show that the feed sizes of polymetallic complex ore have an obvious influence [...] Read more.
Based on batch grinding method and normalization idea, a conical ball mill is used and a quantitative separation method of grinding characteristics of multi-component complex ore is proposed. The results show that the feed sizes of polymetallic complex ore have an obvious influence on the particle size distribution of intermediate grinding products in the early stage of grinding. However, the influence of the feed size is relatively insignificant on the particle size distribution of intermediate grinding products in the middle and late grinding stages. The grinding product t10 is negatively correlated with the feed sizes of ore when the grinding force is applied to the ore. At the same time, it has a simple positive linear relationship with the grinding time. The contribution rates of component minerals pyrrhotite, sphalerite and quartz to the grinding characteristics of the ore are 28.64%~37.74%, 39.93%~51.84%, 16.07%~28.39%, respectively. Therefore, the order of contribution of component minerals to the grinding characteristics of ore is sphalerite > pyrrhotite > quartz. The results provide new insights for the subsequent study of grinding characteristics of multi-component complex ores. Full article
(This article belongs to the Special Issue Experimental and Numerical Studies of Mineral Comminution: 2nd Edition)
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