本設備是供選礦實驗研究單位和選礦中間實驗工廠，進行礦石可選性研究實驗時，作業連續磨礦或研究測定礦石可磨性指標之用。亦可供選礦精選廠作磨礦設備使用，或供其他工業部門磨細物料之用。本產品由原地礦部唯一指定企業生產，執行行業標準。

設備主要由420×450格子型球磨機、150×1200螺旋分級機、35升擺式給礦機、Φ90×600螺旋運輸機組成，可連續進行閉路磨礦工作。

設備出廠時，均已裝好電氣設備和供水系統。

安裝時，不需另設基礎。開箱后，裝上機架下部四個地腳螺釘，清理包裝油脂，檢查潤滑情況，接上水管、電源。試開車，確定運轉方向，即可按操作順序進行運轉。

根據所處理的物料性質和對磨細產品粒度特性的具體要求，可選用以下三種不同的磨礦流程，分別進行磨礦：1、預先磨礦，檢查分級；2、預先分級，返砂再磨；3、開始磨礦；

Laboratory Grate Mill S12 is provided for mineral processing research organization and pilot plant for continued grinding operation,and study and determination of indexes of ore grindability in tests of mineral feasibility study . It also can be provided for beneficiation plant as grinding equipment or other industries as fine material grinding equipment. The product is produced by the only enterprise designated by the former Ministry of Geology and Mineral Resources, in compliance with the Industrial standards.

The equipment mainly comprises 420×450 Grate Ball Mill, 150×1200 Screw Classifier, 35 liter Swing Feeder and ф90×600 Screw Conveyor and can conduct grinding operation  continuously in a close circuit.

It comes with the factory –fit electric devices and water supply system.

Mounting requires no additional foundation. After opening the case, fix 4 anchor bolts, clean packaging grease, check lubrication and connect water pipeline and power supply. Trial run is carried out to determine the operation direction and then the equipment can run as per the operation procedures.

Three different grinding circuits can be selected for separate grinding operation below in response to the properties of the handled materials and specific requirements for particle size characteristics of size reduction product: 1. Pre-grinding , checking and classification 2. Pre-classification and  return of sand for regrinding 3. grinding in a close circuit.

主要結構說明

Main Structure

本機主要由給礦、磨礦、排礦、分級、運輸等五部分組成。

This machine mainly consists of  five parts i.e. feeding part, grinding part, discharging part, classifying  part, and conveying part.

（一）、給礦部分

(I) Feeding Part

由一個礦倉式圓筒給礦機及一個蝸形給礦器組成。給礦方法在礦倉的閘門打開后通過圓筒的轉動使礦倉內的物料連續而均勻地送進蝸形給礦器外殼中，再由蝸形給礦器連同水一起送進磨礦筒內，給礦量是用調節閘門板的開口大小及圓筒轉速來控制。圓筒由螺旋運輸機軸上的皮帶塔輪用皮帶傳動，有兩種速度。蝸形給礦器為一平面螺旋形的勺子，用來直接向筒體內部輸送原礦和分級機的返砂。

The feeding part is composed of  a cylindric feeder of ore storage bin type and a snail feeding device. The  feeding method is: After the gate of the ore storage bin is opened, materials  in the ore storage bin are fed continuously and evenly into the shell of the  snail feeding device through the rotation of drum; then they are fed into the  milling drum by the snail feeding device together with the water. The feeding  quantity is controlled through adjusting the size of the opening of the gate  plate and rotating speed of the drum. The drum is driven at two speeds through the  belt by the belt cone on the shaft of screw conveyor. The snail feeding device  is a scoop in the shape of planar spiral which is used to convey raw ores and  return sand from the classifier directly to the inside of drum.

（二）、磨礦部分

(II) Grinding Part

是一個Φ420×600磨礦筒體，其內壁鑲有六塊波紋形錳鋼襯板，外壁焊有兩個輪圈。輪圈支承在兩對托滾上；蝸形給礦器固定在筒體的一端，另一端則為溢流排礦口。筒體的旋轉是由電動機經三角皮帶和齒輪二級減速后，使一對主動托滾轉動，利用托滾與輪圈的磨擦實現傳動達到的。

The grinding part is a Φ420×600  grinding drum. Its inner wall is lined with six corrugated manganese steel  liners and its outer wall has two wheel rims. The wheel rims are supported on  two pairs of rollers. At one end of the drum is snail feeding device and at the  other end of the drum is overflow discharging mouth. The function of  transmission is served by the rubbing of roller and wheel rims when the motor  gets one pair of drive roller to rotate through the V-belt and secondary gear  reducer.

（三）、排礦部分

(III) Discharging Part

磨礦產品經排礦端蓋口自行溢出，經過排礦溜槽的斜度自動的流入分級機，溜槽上端焊有一軟管接頭，用膠管與給水管接通，給水管上裝有旋塞，以便開、關和調節沖洗的水量。溜槽外側插上一個擋蓋，以免排礦口礦漿往外飛濺。

The grinding products  automatically overflow when passing the cover at the discharging end. They  automatically flow into the classifier through the tilting discharging chute. A  hose coupler is welded on the top of the chute which are connected with rubber  pipes and feed pipes. On the feed pipes are taps which are used to turn on and  turn off water as well as adjust the water flow. A retaining cap is inserted to  the outside of the chute to avoid the slurry at the discharging mouth from  splashing out.

（四）、分級部分

(IV) Classifying Part

是一個Φ150×1400螺旋運輸機，利用排礦溜槽入口孔作為其一端的支點，整個分級機可繞這個支點轉動一定的角度，以達到不同的坡度要求，另一端則用一螺桿支承，轉動其上代套筒螺母的手輪，即可調節分級機的坡度，以便控制返砂量的大小及溢流的細度。

The classifying part is a  Φ150×1400 screw conveyor. It takes the inlet of discharging chute as the fulcrum  of its one end around which the whole classifier revolves for a certain angle  to meet the requirement of different gradients. Its other end is supported with  a screw. The gradient of the classifier can be adjusted when the hand wheel of  sleeve nut on it is turned, so as to control the amount of return sand and  fineness of effusion.

（五）、運輸部分

(V) Conveying Part

是一個Φ90×420的螺旋運輸機，將分級機與蝸形給礦器外殼連接起來，把分級機的返砂連續均勻地送入蝸形給礦器外殼，再與礦倉式給礦機下來的原礦一起由蝸形給礦器送入磨機筒體內。使分級機與磨機組成一個閉路磨礦系統，實現連續磨礦作業。

The conveying part is aΦ90×420  screw conveyer. The conveying process is: The classifier and snail feeding  device is linked; the return sand from the classifier is fed continuously and  evenly to the shell of the snail feeding device, and the snail feeding device  then conveys it and the raw ores from the feeder into the grinding drum, so  that the classifier and mill form a closed-circuit grinding system and  continuous grinding can be realized.

上述各部分與傳動系統、供水系統、電氣設備等均裝好在機架上，成臺出廠，安裝時不需另設基礎。在車間內擺好位置以后，略將水平調好，清理包裝油脂，檢查潤滑情況；接水管、電源；試開車確定磨機運轉方向。符合要求后，即可按操作程序進工作。

All the parts listed  above and the drive system, water supply system, and electric equipment shall  be installed on the frame to be shipped in complete set. During installation,  it is not necessary to add new foundations. When it is placed in the workshop,  adjust the supporting plane slightly, remove oil staining on the package,  examine the lubricating condition, connect it to water and power source, as  well as determine the operating direction of mill through test run. When all  relevant requirements are conformed to, the equipment can be operated according  to procedures.