一、用途：

I. Purpose:

本機主要適用測定石料的磨耗率。

This machine is designed for determination of abrasion ratio of stones.

二、結構：

II. Structure:

本機主要有圓筒、擱鐵、密封蓋、支架、變速箱、電機、料斗及計數器等部件所組成。

This machine is mainly composed of cylinder, placement iron, sealing cover, support, transmission case, motor, hopper and counter etc.

三、主要技術參數：

III. Main Technical Parameters:

1、圓筒內徑× 內長：710±5㎜×510±5㎜

2、轉速：30-33r/min

3、計數器：5位

4、外形尺寸：1320×980×1050㎜

5、鋼球：Ф48㎜

1. Cylinder inner diameter × inner length: 710±5㎜×510±5㎜

2. Rotation speed: 30-33r/min

3. Counter: 5 digits

4. Outside dimensions: 1320×980×1050㎜

5. Steel ball: Ф48㎜

四、使用方法：

IV. Operation Method

1、試驗前必須檢查線路是否完好，并用手撥動滾筒旋轉是否轉正常（按筒旋轉箭頭方向）。同時，將計數調整到零位。

1. Be sure to check if the line is in good condition before test and to rotate the cylinder to check if it rotates normally (in the direction of arrow). And then set the counter to zero position.

2、將試用的碎石料和鋼球裝入筒內、密封蓋好、擰緊螺釘、開動儀器轉動500轉后停止，取出試樣。

2. Place the gravels and steel balls into cylinder, cover the seal gland, fasten the screw and start the instrument. Stop the machine after 500 rounds of operation and take out the test sample.

3、用直徑2㎜圓孔篩式邊長2.6㎜方孔篩。篩法試樣中的石屑，用水沖洗留在篩上的碎石烘重、恒重，準確稱出重量。

3. Screen the stone chips from the test sample with round-hole sieve with a diameter of 2mm or square-hole sieve with an edge length of 2.6mm. Wash and dry the gravels left on the sieve and weigh them accurately.

五、計算方法：

V. Calculation method:

1、按下列計算石料磨耗率精確至0.1%。

1. Calculate the stone abrasion ratio according to the following formula (accuracy to 0.1%).

Qa – abrasion ratio of stone: %

G1 – original weight of gravels loaded in cylinder: g

G-2 – the weight after washing and drying after the test: g

2、試驗結果為兩次試驗之平均值，兩次誤差不大于2%，否則需要重新試驗。

2. The test result is the average value of two tests, between which the error shall not exceed 2%. Otherwise, another test shall be conducted.