Carbolite Coal and Coke Furnaces

Coal & sulphur furnace (CFM)

• Combustion tube furnaces:
  For sulphur and chlorine tests, in accordance with BS1016 parts 6 & 7; ASTM D 3177-75; ISO 351 & 609.
• Also ideal for a wide range of laboratory tube analysis applications. AUX models include an auxiliary heater for carbon and hydrogen contents tests
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Digital coal ash fusibility furnace (CAF)

• The introduction of the Carbolite digital Coal Ash Fusibility test furnace has revolutionised coal sample testing where time and accuracy are both critical
• Designed to heat coal ash samples to a maximum temperature of 1600°C in a controlled atmosphere
• Up to 12 samples can be simultaneously tested
• Visually records the fusion samples for further analysis
• Furnace work tube is sealed and has a fail-safe gas control system for use with toxic & flammable gases
• Sliding & rotating door mechanism provides unrestricted access to work tube for loading/unloading samples
• Maximum number of samples : 12
• Digital data capture
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Coke reactivity test furnace

• ASTM D 5341–93a Coke Reactivity Test Unit
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Iron ore reducibility furnace

• A single furnace unit for testing to the following standards : ISO 4695 – Iron ore reducibility.
• Reducibility may be defined as a measure of the ease with which oxygen, combined with iron, can be removed from natural or processed iron ores by a reducing gas, which is expressed as the rate of reduction at an atomic ration O/Fe = 0.9, relative to the iron (III) state.
• The test consists of isothermal reduction of a test portion at a specified size range in a fixed bed at a temperature of 950ºC using a reducing gas consisting of CO and N2. ISO 4696 – Low temperature disintegration test: Evaluating the disintegration behaviour of iron ores reduced in a fixed bed under specific conditions relevant to the low temperature zone in the blast furnace for iron making.
• This method is a measure of the breakdown of blast furnace burden materials under conditions resembling those in the upper part of the blast furnace.
• In principle, the test specifies a method for testing the disintegration of iron ores by tumbling, at room temperature, a sample that has been reduced in a fixed bed at a temperature of 500ºC.
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Linder test furnace

• Low Temperature Disintegration Test Tumbling During Reduction
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Minimum free space oven (MFS)

• For the determination of moisture in coal and coke by drying in a nitrogen atmosphere as described in BS 1016 : Parts, 1 3 & 4
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Variable width moving wall coking oven

• Designed for testing suitably granulated and graded coals for coking under acurately controlled conditions
• Allows the pressure generated during the coking to be exerted against a fixed wall on one side & a moving wall on the other
• Maximum operating temperature 1250°C
• Pressure is measured by a load transducer actuated by the moving wall
• Recommended width : 455mm with a nominal charge weight of 255kg (dry basis)
• Separate control cabinet houses all instrumentation
• Other widths are available
• Many optional extras including charge hoppers, trolleys, quench carts and discharge rams

Volatile Matter Furnace (ISO 562)

• This furnace offers improved temperature and reduced response times to meet the requirements of ISO 562;
• Fast heating: Powerful open spiral elements are supported in lightweight insulation, providing fast heating – typically 20 minutes to 900°C;
• Use of a sophisticated algorithm ensures fast recovery of temperature after loading the samples – less than 4 minutes to return to 900°C +10°C;
• Calibration ports are provided which permit the insertion of unsheathed probe thermocouples, from the back of the chamber, without risking touching live electrical connections;
  
• The probe thermocouple can be positioned under each crucible in turn;
  
• A chimney or flue is provided at the back of the chamber;
  
• Insulation: Hardwearing refractory brick is used around the doorway and a SiC floor provides abrasion resistance : lightweight ceramic fibre is used in other areas to ensure energy efficient fast heating and cooling, together with low heat loss into the room;
  
• Door action: A parallel upward action keeps the hot face insulation away from the operator during loading and unloading : when the door is opened, a positive action safety switch automatically isolates the heating elements from the supply to protect the operator from accidental contact with a live heating element;
  
• Power switching : solid state thyristor based zero voltage switching and rapid cycle time give smooth and reliable control with minimal electromagnetic emissions;
  
• Service is aided by diagnostic warning lights, a removable front instrument panel and easy access to the heating elements and thermocouple;
  
• Cool & safe outer case temperatures are achieved by natural convection moving air silently and reliably through cooling passages.
  
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Volatile Matter Furnace (ASTM)

• For tests in accordance with ASTM D3175-89a (reapproved 1993).
  
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