Bond Index Tester BT 100 XL

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A 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.

Zalety produktu

  • suitable for the determination of Work Index according to Bond
  • available modules include Ball Mill and Rod Mil
  • easy tilt function to empty the drum
  • solid steel frame
  • removable sample collector
  • convenient parameter setting via display
  • funnel with handles
  • guide rail allows for ergonomic removal of jar
  • separation grid to separate sample from grinding balls (only for Ball Mill)
  • grinding jar with gasket for loss-free operation
  • solid noise-protection hood with safety switch
  • emergency switch

Cechy

Aplikacje quantification of grindability of ores and minerals
Pola zastosowań geologia / metalurgia, materiały dla budownictwa, środowisko / recykling
Materiał wejściowy twarde, kruche
Zasada działania friction
Wielkość wejściowa* < 3.35 mm with ball module / 12.50 mm with rod module
Rozdrobnienie końcowe* < 100 µm with ball module / 2,100 µm with rod module
wielkość wej. / ilość materiału* min. 15 kg with ball module / min. 20 kg with rod module
Rotation speed 70 min-1 with ball module / 46 min-1 with rod module
Liczba stanowisk 1
Wykonanie materiałowe elementów rozdrabniających utwardzana stal
Wielkości naczyń mielących 21.7 l with ball module / 43.3 l with rod module
Ustawienie czasu mielenia cyfrowe
Moc napędu 0,75 kW
Dane elektryczne napięcie zmienne
Podłączenie do sieci 1-fazowa
Stopień ochronny IP 50
W x H x D w pozycji zamkniętej 1500 x 1200 x 700 mm
Waga netto ~ 295 kg
Normy / Standardy CE

Uwaga:
*w zależności od materiału wejściowego oraz konfiguracji/ustawień urządzenia

Zasada działania

球和棒磨机主要有相同的概念包括一个12 x12“带球的罐或12 x24 ”罐和研磨棒。
研磨罐放到一个电机驱动旋转的支架,有三种摆放方式::向上加载,水平研磨,向下排出。
进行邦德功指数测试需要用到已知的研磨球或研磨棒,电子控制集成的驱动器配有过载保护和许可和控制不同的速度。
在磨削过程中球/棒运动和研磨罐的速度差产生相互作用和影响的摩擦力,释放出所需的粉碎能量。这些力量之间的相互作用产生有力的粉碎效果。

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