高压辊磨机HPGR及其应用

高压辊磨机及其应用High Pressure Grinding Roll and Its Application赵德君Dejun Zhao摘要：高压辊磨机在世界工业先进国家的冶金矿山工业中，己经得到了广泛的推广应用，而在我国的应用才刚刚起步。

本文简要介绍了高压辊磨机结构、工作机理和高效、节能、环保等先进性能以及磨碎铁矿石的试验研究。

Abstract:High pressure grinding roll has been widely popularized and applied in metallurgical industry and mining industry in the industry-advanced countries around the world. However, its application in our country is still in infancy. This paper is going to briefly introduce the structure and working principle of high pressure grinding roll, its advantages such as high efficiency, energy conservation and environmental protection, and the reach study of grinding iron ore.关键词：粒群、层压破碎、压力峰值、微裂纹、抗磨料垫。

Key words:Particle flow, inter-particle breakage, pressure peak, micro-cracking, anti-wear layer高压辊磨机简介高压辊磨机（也称辊压机）是十九世纪八十年代，由德国科学家研制开发的一种先进磨碎设备。

由于该产品的结构简单、生产效率高、环保节能和工作机理先进等优点，很快被推广应用到美国、德国、俄罗斯、巴西、智利、澳大利亚等工业先进国家。

我们国家于1988年，由德国洪堡公司引进高压辊磨机的许可证制造生产技术，首先应用在水泥熟料的磨碎生产中，收到了显著的效果，并得到了广泛的推广应用。

图1即是国内生产的高压辊磨机主机。

Introduction of high pressure grinding roll (HPGR)High pressure grinding roll is a kind of advanced grinding equipment developed by Germany scientists in the 1980s. It was popularized soon in USA, German, Russian, Brazil, Chile, Australia and other advanced industrial counties because of simple structure, high production efficiency, environmental protection and energy-saving and advanced working principle. Ourcountry introduced the manufacturing technology of HPGR from KHD, a Germany Company. It was firstly applied in the grinding of cement clinker which achieved obvious effects. So, the machine was widely promoted and applied. Figure 1 is the main frame of HPGR produced in domestic.图1高压辊磨机Figure 1 High Pressure Grinding Roll (HPGR) 经过二十几年的生产实践，在吸收消化引进技术的基础上，先后开发设计了多种规格的高压辊磨机，装备于国内各大中型水泥企业，用于磨碎水泥熟料的生产中，并已形成了产品系列。

经过长期的生产实践证明，我国自己生产制造的高压辊磨机完全能够替代进口的设备。

在冶金工业中，近几年来在烧结厂的磨细铁精粉制备球团给料生产中，也已经成功的应用国产的高压辊磨机，并取得了很好的效果。

但在矿山选矿工业领域内，利用国产的高压辊磨机细碎金属矿石，目前还没有成功的先例。

After more than twenty years of production practice and learning from introduced technology, high pressure grinding roll has formed product seriation and been applied in national large-medium size cement enterprises for grinding cement clinker. It has been proved that HPGR manufactured in domestic can replace imported ones completely after years of production practice. In metallurgical industry, high pressure grinding roll has been successfully used in the pelletizing feed production of grinding fine iron in sintering plant for recent years which also achieves very good results. However, it is still no successful examples to use domestic high pressure grinding roll for comminuting metallic ore in the area of mineral separation.1. 高压辊磨机机理及结构Mechanism and structure of HPGR1.1. 高压辊磨机机理：Mechanism高压辊磨机是利用高挤压力作用使粒群层压破碎原理而设计的。

挤压力是通过两个直径相等、转速相同且相向旋转的辊子压力而产生的。

其中一个辊子为定辊，另一个为可以前后水平小幅度移动的动辊，压力通过高压油缸加在动辊两端的轴承座上。

高压辊磨机工作时，物料由料柱仓靠自重力压入料腔，同时被两个相向旋转的辊子咬入并在辊面作用下受到加速进入压实腔，由于两辊间距的逐渐减小挤压力由小增大，此时物料颗粒除了受到辊面的直接压力外，物料颗粒之间也产生相互挤压作用（见图2），图2颗粒间的受力Figure 2 Forces from other particles导致物料粒群被压实和预粉碎，当辊子旋转至水平中心线时压力达到峰值，各颗粒之间遭到不同程度的粉碎，并随着辊子的转动以压片形式排出机外。

图3即是辊间物料粉碎过程的示意图。

High pressure grinding roll is designed according to the principle of inter-particle breakage by huge pressures. The pressure is from a pair of counter-rotating rolls with the same diameter and rotary speed. One is fixed while the other is allowed to shift front and back slightly. Pressures are worked on the bearing supports at the both ends of floating roll through high pressure cylinder. While HPGR is operating, materials are entering into the crushing cavity by its gravity from stock column bin, and then are bitten by the two counter-rotating rolls, forced into compacting cavity. Duo to the gap reduction between two rolls, compression force increases. Material particles are compressed by roll surfaces directly but also other particles, leading to material particles compacted and pre-crushed. When rolls are rotated to the horizontal center line, pressures reach to peak. Particles are crushed in different degrees. With the rotation of rolls, materials are discharged in the form of tablets. Figure 3 displays the grinding process of material between rolls.物料压力material pressure辊面roll surface 加速区accelerating zone 压实区compacting zone 膨胀区expansion zone 图3 辊间粉碎过程Figure 3 grinding process between rolls1.2 高压辊磨机结构Structure of HPGR高压辊磨机的组成如下：给料装置安装在主机机架上部，挤压辊装置安装在机架的机座上，由轴承装置支撑，每个辊子都有单独的传动系统，并通过万向联轴节、安全离合器及行星齿轮减速器，将能量传递给挤压辊；中央润滑系统向各轴承装置提供润滑油和润滑脂。