MQG型干式格子型球磨機 Grate ball mill

國家行業標準JB/T1406

一、概述

目前，國內使用的球磨機大多是圓柱形，而且采用的軸承為滑動軸承，內襯波形襯板，因而這類球磨機粗大笨重、產量低、噪音大。本實用新型設計的目的就是提供一種重量輕、造價低、能耗省、噪音小、鋼耗低、生產率高的新型球磨機的特征是：

(1).主軸承部分：采用雙列向心球兩滾子軸承，使主軸頸尺寸大大縮小，既可減輕磨機重量，又可減少磨擦力，降低無用功消耗，同時保證自動調心，延長使用壽命，操作簡單，維修方便。

(2).筒體部分：在原有筒體出料端增加一段圓錐筒體，既增加了有效面積，又使筒內介質分布合理，直徑較大的球位于圓筒內，原礦從該處給入，隨著礦塊在筒內被磨細球自動分級，愈接近排礦口，球徑愈小，因而可充分發揮各類球的作用，得到粒度更細的產品，處理量增加12-25％。

 (3).傳動部分:大齒輪裝于直筒與錐筒連接部位,改善了主軸承部的受力狀況減少了筒體扭曲應力,使齒輪模數及直徑相應減少,從而使球磨機自重減輕30-50％,降低了制造成本.

(4).采用新型環溝襯板,使產量增加10％,電耗降低18％,鋼耗減少40％,噪音降低5-6分貝.

 (5).由于采取上述措施,使電機功率降低20-40％,使用本系列球磨機可獲得重大的經濟效益,僅由于節電費用既可2-3年內收回球磨機投資.

二、機器用途

本產品可廣泛用于有色金屬、黑色金屬、非金屬選礦廠及化工、建材等行業作研磨物料之用.濕式格子型、溢流型用于濕磨各種硬度的礦石,干式格子型用于干磨各種硬度的礦石和物料.

三、機器結構及其工作原理

本產品由于給料部、進料部、筒體部、出料部等工作部分,以及軸承、傳動、電氣、基礎部等組成.

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、技術參數

注：1、以上機器總重量不含電機  2、表中的產量為估算產量，其給礦粒度為25㎜-0.8㎜的中等硬度的礦石。