MQG型干式格子型球磨机 Grate ball mill

国家行业标准JB/T1406

一、概述

目前，国内使用的球磨机大多是圆柱形，而且采用的轴承为滑动轴承，内衬波形衬板，因而这类球磨机粗大笨重、产量低、噪音大。本实用新型设计的目的就是提供一种重量轻、造价低、能耗省、噪音小、钢耗低、生产率高的新型球磨机的特征是：

(1).主轴承部分：采用双列向心球两滚子轴承，使主轴颈尺寸大大缩小，既可减轻磨机重量，又可减少磨擦力，降低无用功消耗，同时保证自动调心，延长使用寿命，操作简单，维修方便。

(2).筒体部分：在原有筒体出料端增加一段圆锥筒体，既增加了有效面积，又使筒内介质分布合理，直径较大的球位于圆筒内，原矿从该处给入，随着矿块在筒内被磨细球自动分级，愈接近排矿口，球径愈小，因而可充分发挥各类球的作用，得到粒度更细的产品，处理量增加12-25％。

 (3).传动部分:大齿轮装于直筒与锥筒连接部位,改善了主轴承部的受力状况减少了筒体扭曲应力,使齿轮模数及直径相应减少,从而使球磨机自重减轻30-50％,降低了制造成本.

(4).采用新型环沟衬板,使产量增加10％,电耗降低18％,钢耗减少40％,噪音降低5-6分贝.

 (5).由于采取上述措施,使电机功率降低20-40％,使用本系列球磨机可获得重大的经济效益,仅由于节电费用既可2-3年内收回球磨机投资.

二、机器用途

本产品可广泛用于有色金属、黑色金属、非金属选矿厂及化工、建材等行业作研磨物料之用.湿式格子型、溢流型用于湿磨各种硬度的矿石,干式格子型用于干磨各种硬度的矿石和物料.

三、机器结构及其工作原理

本产品由于给料部、进料部、筒体部、出料部等工作部分,以及轴承、传动、电气、基础部等组成.

I. Summary

Most ball mills used in China at present are cylindrical. The bearings adopted are slide bearings and the lining plates adopted are wave lining plates. Thus these ball mills are cumbersome, make loud noise, and are not massed produced. Utility design is aimed to produce a new type of ball mill that is light in weight, low in cost, low in energy consumption, low in produced noise, low in steel consumption and high in productivity.

(1) Main bearing: The main bearings are double row radial two-roller bearings which largely reduce the size of main journals. Not only is the weight of mill reduced, but also friction is reduced and consumption of useless power is reduced. Besides, they ensure self-aligning, prolong service life, and is easy for operation and maintenance.

(2) Cylinder: A section of conic cylinder is added at the material discharge end of the original cylinder, which not only increases effective area, but also enables media in the cylinder to be reasonably distributed. Balls with relatively large diameters are within the cylinder where raw ores are fed. As the ore blocks are finely grinded in the cylinder, the balls are automatically classified. The closer the balls are to the ore discharge mouth, the smaller the ball diameters are. Therefore, the functions of various balls can be brought into full play to get production of finer grains and increase treatment capacity by 12% to 25%.

(3) Transmission part: When large gears are installed in the part connecting the straight cylinder and taper cylinder, the stress state of the main bearings is improved and torsional stress of cylinder is reduced to get the model and diameter of gear to be correspondingly reduced. The weight of ball mill is thus reduced by 30% to 50% and manufacturing costs are reduced.

(4) New circular groove liners are adopted to enable yield to be increased by 10%, power consumption to be decreased by 18%, steel consumption to be reduced by 40% and noise to be reduced by 5 to 6db.

(5) As when the above measured are adopted, the motor power can be reduced by 20% to 40%, great economic benefits can be gained if ball mill of this series is used. Even the saved electric charge through the use of such ball mill can offset the investment into the ball mill.

II. Application

Such products can be widely applied in industries such as nonferrous metal, ferrous metal, and non-metallic minerals as well as chemicals and building materials to grind materials. Wet grate ball mills are used for the wet grinding of ores of various hardness degrees while dry grate ball mills are used to the dry grinding of ores and materials of various hardness degrees. 

III. Structure and Working Principle

Such product is composed of working parts such as feeding part, entering part, cylinder part and charging part, as well as bearings, transmission parts, electric parts, basic parts, etc.

四、技术参数

注：1、以上机器总重量不含电机  2、表中的产量为估算产量，其给矿粒度为25㎜-0.8㎜的中等硬度的矿石。