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深部井下结构紧凑型煤矸智能化精确分选技术及装备

项目来源

国家重点研发计划(NKRD)

项目主持人

曹亦俊

项目受资助机构

郑州大学

项目编号

2018YFC0604702

立项年度

2018

立项时间

未公开

研究期限

未知 / 未知

项目级别

国家级

受资助金额

314.00万元

学科

深地资源勘查开采

学科代码

未公开

基金类别

未公开

关键词

井下选煤 ; 水力旋流器 ; 水化作用 ; 采选充一体化 ; 智能化 ; 模块化 ; underground coal preparation ; hydrocyclone ; hydration ; mining-preparation-backfilling integration ; intelligent ; modular

参与者

桂夏辉；刘培坤；庞卫东；张培森；张悦刊；王志刚；刘敏

参与机构AI

山东科技大学

项目标书摘要：随着机械采煤技术和放顶采煤技术的推广，使大量矸石混入原煤，部分矿井含矸率达到60%以上，传统井下采煤—井上选煤模式面临矸石运输带来的无用能耗和地表矸石污染环境等问题，造成大量能源、资金浪费，井下选煤技术急需深入研究。目前，井下选煤技术仅限井下预排矸，分为干法和湿法，干法排矸受到物料性质的限制，尚难广泛推广；动筛跳汰精度较差，洗选深度低；重介质浅槽分选机分选精度较高，洗选深度较高，但重介质回收和再生系统复杂，占地面积大。因此本项目提出“井下专用紧凑型跳汰机—精细分级精确分选水力旋流器”技术，保证洗选深度，节约井下空间。项目主要开展四个方面的研究:1井下煤矸精确分选过程共性关键技术。颗粒与液流的跟随性规律和相互作用机制，明晰煤矸分离规律，研究煤矸界面水化作用机制，建立调控胶体体系颗粒分散行为方法，开发井下煤泥水巷道自过滤净化与循环利用技术。2井下煤矸智能化精确分选关键装备。开发排矸率高，矸石带煤率低，处理能力大，安全和防护等级高，结构适应的井下专用紧凑型跳汰机，开发两段组合式水介质旋流器。3井下分选系统及物料运输智能化控制。开展跳汰智能化分选和物料运输智能化控制研究，实现煤矿井下采选充带式输送机系统的智能化。4构建简洁高效的智能化模块化井下煤矸分选系统。

Application Abstract: With the popularization of mechanical coal mining technology and top coal mining technology,a large amount of gangue is mixed into raw coal,and some mines has a gangue content of more than 60%.The traditional underground coal mining-upground coal preparation mode is faced with the useless energy consumption caused by gangue transportation and the environmental pollution caused by gangue,resulting in a large amount of energy and capital waste.The underground coal preparation technology urgently needs in-depth study.At present,underground coal preparation technology is limited to underground pre-drainage,which is divided into dry method and wet method.Dry method is limited by the nature of materials,and it is still difficult to widely promote;the accuracy of moving screen jigging is poor,and the washing depth is low;The medium shallow tank sorting machine has higher sorting precision and higher washing depth,but the heavy medium recovery and regeneration system are complex and covers a large area.Therefore,the project proposes the technology of“underground dedicated compact jig-fine grading and precise sorting hydrocyclone”.Guarantee washing depth and save underground space.The project mainly carries out research in four aspects:1Common key technologies for the accurate separation process of underground coal gangue.The following rules and interaction mechanism of particle and liquid flow,clear the separation law of coal gangue,study the mechanism of hydration of coal gangue interface,establish a method of regulating particle dispersion behavior of colloidal system,and develop self-filtration purification and recycling technology of underground coal slurry roadway.2Intelligent and precise sorting of key equipment for underground coal gangue.Developing the compact jig for underground mines with high drainage rate,low coal-bearing coal rate,high processing capacity,high safety and protection grade,and structural adaptation.Developing the two-stage hydrocyclone.3Intelligent control of underground sorting system and material transportation.Carry out intelligent research on jigging intelligent sorting and material transportation intelligent control to realize the intelligentization of belt conveyor system of mining-preparation-backfilling system.4Construct a simple and efficient intelligent modular underground coal shovel sorting system.

项目受资助省

河南省

联系人信息

桂夏辉：guixiahui1985@163.com

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  • 1.Role of molecular simulation in understanding the mechanism of low-rank coal flotation: A review

    • 关键词：
    • Low-rank coal; Flotation; Molecular simulation; Interfacial interactionmechanism;BUBBLE-PARTICLE ATTACHMENT; OXIDIZED COAL; PYROLYSIS CHARACTERISTICS;DYNAMICS SIMULATIONS; KAOLINITE PARTICLES; FROTH FLOTATION; BROWN-COAL;LIGNITE; SURFACE; OIL

    Flotation is the main method for recovering and reusing fine low-rank coal by taking advantage of the difference in physicochemical properties of the mineral surface, but its efficiency has not yet reached a satisfactory level. Particles, flotation reagents, and air bubbles are highly dispersed and interact with each other in a flotation cell. Therefore, a basic understanding on the fundamental mechanism of the above interactions involved in a low-rank coal flotation system is the prerequisite for improving low-rank coal flotation recovery. In recent years, with the development of theoretical chemistry and computational chemistry, molecular simulation has gradually become a powerful tool for studying low-rank coal flotation, which has shed new light on the molecular structure of low-rank coal and the interfacial interaction in low-rank coal flotation at the molecular or atomic levels. In this paper, we first review the basic theory of molecular simulation, and then we review the recent advances in the molecular structure of low-rank coal. Coal-water, coal-reagent, coal-bubble, and coal-clay interactions are discussed comprehensively from the viewpoint of molecular simulation. This review is closed with a brief conclusion and perspective discussion.

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  • 2.The role of surface forces in mineral flotation

    • 关键词：
    • Surface force; Mineral flotation; Inter-particle interaction;Inter-bubble interaction; Bubble-particle interaction;BUBBLE-PARTICLE ATTACHMENT; HYDROPHOBIC FORCE; SOLID-SURFACES; AIRBUBBLES; FILMS; WATER; VANDERWAALS; ELECTROLYTE; STABILITY; MEDIA

    Flotation is an interfacial separation technique, which plays a major role in mineral processing industry. It separates particles according to their wetting properties. In flotation pulp, particles and bubbles are highly dispersed in aqueous medium and in the presence of various flotation reagents. Almost all interfacial interactions including inter-particle, inter-bubble, and bubble-particle interactions in the complex pulp medium are driven by surface forces. Therefore, a fundamental understanding of the role of surface forces in flotation is a prerequisite to enhance practical flotation performance and adapt it for treatment of complex and refractory ores. In this paper, recent advances in the field of surface forces encountered in mineral flotation are reviewed. In particular, we highlight the latest progress in the attachment mechanism between bubble and particle with the aid of atomic force microscope and interference microscope. The current knowledge gap and future directions are also discussed.

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