磨矿介质运动形态分析的散体理论

根据磨矿介质运动的散体性质，分析了磨矿介质的受力及运动形态，建立了描述磨矿介质运动状态的散体理论，并进行了试验论证。     

磨矿介质对钾盐类矿物的浮选影响剖析

本文在对磨矿的概念及工作原理、磨矿介质的分类进行研究的基础上,选取了含量较为丰富的钾盐类矿物为研究对象,针对磨矿介质对钾盐类矿物的浮选影响展开了分析,主要影响有钾盐类矿物粉碎程度、钾盐类矿物分级程度、钾盐类矿物粗糙程度等。     

炼焦煤中煤磨矿解离再选试验研究

对山西某炼焦煤选煤厂中煤产品进行磨矿解离,考察了不同磨矿时间下煤样的细度,并对不同细粒级含量的中煤样进行了分步释放浮选试验,结果表明,磨矿解离后能有效分选出中煤中的可燃体成分,全厂总精煤产率可提高6.98%。     

煤沥青水浆干法制备的磨矿试验研究

通过对煤沥青水浆干法制备的磨矿工艺试验研究,确定了中温煤沥青干磨制浆的最佳磨矿条件,并提出了煤沥青干磨磨矿动力学方程：R（t）=100exp[-（-0.11268＋0.00132.d1.09279）.t（1.85974-0.26352.lnd）],据此可以求出干法制备磨矿过程中任意时刻待磨粒级的分布率。     

蒸汽吞吐主要参数对开发效果影响研究

在普通稠油油藏开发过程中,蒸汽吞吐通过注蒸汽、焖井、开井生产三个阶段可以降低原油粘度,改善流度比,从而降低残余油饱和度,提高驱替效率,是一项有效的开采稠油的方式。蒸汽吞吐的开发效果是热采参数综合作用的结果。本文通过数值模拟的方式,系统的研究了注汽强度、注汽速度、焖井时间、排液时间对开发效果的影响,对普通稠油油藏开发具有提供相应的参考     

提高磨矿浮选工艺的方法研究

本文对磨矿浮选工艺进行了研究,分析了磨矿和浮选工艺的工作原理,并在其基础上,提出了提高磨矿浮选工艺的方法和途径,主要包括设备和药剂的选取、加工参数的设置、监控管理过程。     

微阶段化磨矿研究与实践

提出了磨矿领域一个新的研究方向——“微阶段化磨矿”．该项研究某大型有色金属集团公司的转炉渣磨矿系统和某大型铁矿选厂的应用结果说明：在磨机运转电流和磨矿产品细度保持不变的情况下．磨矿效率得到显著提高，具有明显的节能降耗效果。     

自生介质旋流器结构试验研究

自生介质旋流器是一种利用离心力场分选末煤的新设备。本文通过正交试验研究了该设备的结构参数与分选效果的关系，在此基础上对其结构进行优化，得到了较理想的分选效果。     

转炉钢渣粉磨性能的实验研究

对转炉钢渣粉磨性能进行了实验研究。结果表明，钢渣的易磨性比熟料差，但优于矿渣。在钢渣所合矿物中，硅酸盐矿物易磨，含铁矿物难磨。通过粉后方式，可以将钢渣中具有胶凝活性的矿物选择性分离出来。     

An experimental study on the performance parameters of an experimental CI engine fueled with diesel-methanol-dodecanol blends

The effects of using diesel-methanol-dodecanol blends including methanol of various proportions on a CI engine performance are experimentally investigated. The methanol concentration in the blend has been changed from 2.5% to 15% with the increments of 2.5%, and 1% dodecanol was added into each blend to solve the phase separation problem. Experimental study has been conducted on a single-cylinder, water-cooled CI engine. The engine has been operated at different compression ratios (19, 21, 23 and 25) and the engine speed was varied from 1000 to 1600 rpm at each compression ratio. The performance parameters such as torque, effective power, specific fuel consumption and effective efficiency for each blend at various conditions are calculated depending on the experimental data. It was concluded that among the different blends, the blend including 10% methanol (DM10) is the most suited one for CI engines from the engine performance point of view. Improvements obtained up to 7% in performance parameters with this blend without any modification to engine design and fuel system are very promising.     

Preparation of a novel vitrified bond CBN grinding wheel and study on the grinding performance

The vitrified bond CBN grinding wheels are characterized by high efficiency, high precision, and low environmental pollution. In recent years, the vitrified bond CBN grinding wheel has been widely used in manufacturing industries such as aerospace, automotive, and machine tools. In this study, a novel vitrified bond formulation containing nano SiO₂ and nano CeO₂ is selected to prepare the grinding wheel. The grinding experiments on 45# steel and YG20 alloy indicate that the grinding performance of the nano vitrified bond grinding wheel is significantly better than that of the conventional vitrified bond grinding wheel. The introduction of nano SiO₂ and nano CeO₂ greatly improves the machining performance of the vitrified bond CBN grinding wheel.     

金刚石柔性磨轮磨削性能的实验研究

金刚石柔性磨轮是金刚石砂带的一种衍生产品,主要用于宝石和玻璃加工.通过对金刚石柔性磨轮进行磨削实验,进一步了解了砂带的磨损形式和磨削机理,同时,对两种不同胶粘剂磨轮磨削性能的优缺点进行对比,确定了其不同的使用方式.     

有序排布结构对金刚石电镀磨盘磨削性能的影响研究

文章主要对有序排布金刚石电镀磨盘和全面电镀型磨盘的磨削性能进行比较,体现有序排布结构在高效磨削、节能降耗等方面的优势。结果表明:在磨削初期,玻璃磨削量相差不大,磨削60分钟后磨削量分别为35.30g和30.70g,有序排布结构能够有效提高磨盘的磨削效率;玻璃磨削表面粗糙度与磨盘表面结构关系不大,主要与金刚石的粒度有关;但有序排布结构能够提高加压压力,有效防止玻璃崩边。     

陶瓷研磨体对水泥熟料粉磨性能影响的研究

在辊压机+球磨机水泥联合粉磨系统中,辊压机系统的主要任务是进行物料的预粉碎,以大大减小入磨物料的粒度,球磨机系统的主要任务是进行物料的研磨和整形。因此,使用低密度、高硬度的陶瓷研磨体可以提高球磨机的粉磨效率。本文分别以相近的陶瓷研磨体和金属研磨体的级配和填充率进行了水泥熟料的粉磨实验。实验结果表明,陶瓷研磨体粉磨的水泥颗粒级配更加合理,3~32μm颗粒含量可以提高3%左右,28d抗压强度可以提高4MPa左右,水泥标准稠度用水量可以降低2%左右,水泥颗粒的圆形度可以提高8.5%左右。     

Research on laser preparation and grinding performance of hydrophilic structured grinding wheels

In order to solve the problems of workpiece damage and grinding wheel clogging when grinding difficult-to-cut materials such as alumina ceramics, organisms with regular hexagonal structures distributed on the body surface and with strong hydrophilicity and high anti-wear functions were used as biomimetic objects for the first time, and the preparation process optimization, structure size design and grinding performance evaluation of hydrophilic structured bronze-bonded diamond grinding wheels were explored in this paper. The influence of the preparation process parameters on the micro-topography and the dimensional accuracy of the structure on the surface of the grinding wheel was revealed, and a new laser structuring process based on the coordinated control of focus position and scanning times was proposed, which could efficiently prepare regular hexagonal structures with a small wall inclination angle and a depth of several millimeters on the surface of the grinding wheel. It was the first to clarify the influence of sub-millimeter-scale structure size on the contact angle of grinding fluid droplet on the surface of the grinding wheel and the surface hydrophilicity of the grinding wheel. Compared with that of the non-structured grinding wheel, the hydrophilicity of the structured grinding wheel was significantly improved, and its surface hydrophilicity increased with the increase of the structure spacing and depth, but had little correlation with the structure side length. The grinding performance of hydrophilic structured grinding wheels and non-structured grinding wheels was evaluated under extreme working conditions. Under the condition of grinding depth of 50 μm, 100 μm and 200 μm, compared with that of the non-structured grinding wheel, the peak grinding temperature of the structured grinding wheel was reduced by 18.0%, 30.4% and 15.2%, respectively, and the surface damage depth of the alumina ceramic after grinding by the structured grinding wheel was reduced by 53.7%, 46.8% and 24.3%, respectively. The hydrophilic structured grinding wheel can enhance the storage and transportation capacity of grinding fluid/chips, effectively relieve the clogging and dullness of the grinding wheel, and significantly reduce the high temperature and damage of grinding. In the next step, we will try to apply this type of grinding wheel to form grinding, in order to provide a reliable solution for suppressing form grinding damage of difficult-to-cut materials.     

耐热酚醛树脂金刚石砂轮的磨削性能研究

文章研究了耐热酚醛树脂和"2123"酚醛树脂作为金刚石砂轮结合剂的耐磨情况。磨削试验结果表明:耐热酚醛树脂粉制作的金刚石砂轮具有较好的耐磨性,所加工工件的表面质量优良。通过热性能、力学性能测试和磨削表面分析,找出了两种树脂砂轮耐磨性和磨削效率存在差异的原因,树脂耐热温度的高低、韧性直接影响砂轮的耐磨性;树脂的硬度对砂轮的磨削效率有影响。     

水泥粉磨工艺对混凝土性能的影响

分别检测了球磨机圈流粉磨工艺和辊压机-球磨机联合粉磨工艺生产的不同强度等级水泥的物理性能及与外加剂的适应性，并将各水泥样配制成混凝土，测试相应混凝土的性能。试验发现，强度高的水泥所配制混凝土的强度不一定高，水泥需水性对混凝土强度的影响甚至超过了水泥强度对它的影响；圈流磨的水泥所配混凝土的强度较高。试验检测了圈流磨及联合粉磨生产的水泥的颗粒组成，分析了联合粉磨的水泥需水性大的原因，找到了控制联合粉磨工艺水泥需水性的工艺指标。