detailed overview and knowledge of the characteristics of a raw material is of utmost importance, especially when planning the layout of a crushing plant. In order to minimize all possible risks extensive trials are necessary to obtain information on the properties of the raw materials . A clear definition of the required crushing capacities and the desired product quality can be precisely determined by using the Bond Index test methods. Using the Bond Index test procedures it is possible to calculate crushing / abrasion behavior of mineral samples. This knowledge is essential to define the required ball mill layout and production capacity.

In order to perform the Bond Index Test successfully it is necessary to use pre-crushed sample material as defined below:

Module Ball Mill

• Minerals pre-crushed to < 3.35 mm and sieved

• Drillcore pre-crushed to < 3.35 mm and sieved

• Half Drillcore pre-crushed to < 3.35 mm and sieved

The Bond Index conforming ball charge consists of:

• 43 x 1.45” balls

• 67 x 1.17” balls

• 10 x 1” balls

• 71 x 0.75” balls

• 94 x 0.61” balls

The optimum number of grinding balls is 285. However, the ball diameters vary due to wear. Therefore, the total ball number should be adjusted from time to time to ensure a total mass of 20.125 grams.
The grinding jar of the Bond Index Ball Mill measures 12″ x 12″ and has well-rounded corners.
 
Module Rod Mill

• Minerals pre-crushed to < 12.50 mm and sieved

• Drillcore pre-crushed to < 12.50 mm and sieved

• Half a drillcore pre-crushed to < 12.50 mm and sieved

The Bond Index conforming rod charge consists of:

• 6 rods of 1.25“ diameter and 21“ length

• 2 rods of 1.75“ diameter and 21“ length

The grinding jar for the Bond Index Rod Mill is 12″ x 24″ in size and has a wave-shaped design. 

At least 15 to 20 kg sample material is required to simulate a closed grinding circuit in a ball or rod mill.  The Rod Mill Work Index (RWI) is used for particle size determination in a size range from 25 mm down to 2.1 mm whereas Ball Mill Work Index (BWI) is used for the range from 2.1 mm down to 100 μm.

Adjustment of grinding parameters:
The operation display permits convenient selection and storage of parameters such as  rotation counter, rotation speed, grinding time, start and stop.

優點

• 適合定義功指數

• 可選球磨和棒磨

• 易傾斜空鼓

• 固體鋼鐵結構

• 可移動樣品收集裝置

• 便捷的數據顯示

• 帶手柄漏斗

• 符合人體工學的導軌利于移除研磨罐

• 分離網格將樣品和研磨球分開（僅限研磨球）

• 帶墊片研磨罐用于無損耗操作

• 固體防噪音罩帶安全開關

• 緊急開關

性能指標

Please note:
受樣品材料性質和儀器配置/設定的影響

作用原理

球和棒磨機主要有相同的概念包括一個12 x12“帶球的罐或12 x24 ”罐和研磨棒。
研磨罐放到一個電機驅動旋轉的支架，有三種擺放方式：:向上加載，水平研磨，向下排出。
進行邦德功指數測試需要用到已知的研磨球或研磨棒，電子控制集成的驅動器配有過載保護和許可和控制不同的速度。
在磨削過程中球/棒運動和研磨罐的速度差產生相互作用和影響的摩擦力,釋放出所需的粉碎能量。這些力量之間的相互作用產生有力的粉碎效果。

根據技術改造和誤差調整