Application field: Mainly used for the rubber discharge firingprocess and new product process experiments of ceramic materials such as HTCC substrates, package shells, SMD, etc. under nitrogen+hydrogen (dry/wet) atmosphere.
Technical speacification and basic configuration
2.1 Rated temperature:1650ºC; 2.2 Maximum temperature:1680ºC; 2.3 Chameber size:500mm×420mm×530mm(W×H×D); 2.4Effective size:300mm×260mm×300mm(W×H×D,Including push plate size 30mm); 2.5 Heating element:Heating around with the molybdenum wire; 2.6 Temperature control thermocouple:tungsten-rhenium thermocouple; 2.7 Furnace structure:A herringbone arch with heavy corundum lining and outer alumina hollow ball brick+lightweight brick structure; 2.8Temperature control points:Single point temperature control; 2.9 Temperature control:Intelligent regulator, with PID parameter Self-tuning function; 2.10 Temperature control stability:±2ºC(Constant temperature zone,); 2.11Furnace atmosphere: N2, N2+H2 (0-50% adjustable) mixed gas (dry/wet) 2.12Humidification device: two stainless steel humidification buckets, one equipped with a chiller and another with a water replenishment device. The two humidification boxes can control the air intake separately and automatically switch according to the process curve. Additionally, a pipeline heating system is equipped; 2.13Furnace pressure detection: Real time detection of furnace pressure; 2.14Oxygen content detection: equipped with one imported oxygen content analyzer to detect the oxygen content in the furnace online; 2.15Hydrogen content detection: equipped with one imported hydrogen analyzer to analyze the hydrogen content of the mixed gas source; 2.16Dew point detection: Equipped with an imported dew point meter to test the dew point of the intake point, with precise and controllable dew point; 2.17Furnace temperature uniformity: ± 5 ºC (within the effective space, in an empty furnace state, tested at a constant temperature of 1650 ºC); 2.18Exhaust method: The exhaust chimney is located at the rear of the furnace, and the exhaust port is designed with a rubber oil recovery device and exhaust gas treatment device; 2.19Maximum heating power: approximately 40kW; 2.20 Cooling structure: The furnace wall is equipped with water cooling, inlet cooling/furnace cooling, and the surface temperature of the furnace body≤ 50 ºC 2.21Alarm protection: audible and visual alarm protection for over temperature, thermocouple broken, low gas pressure, low water pressure, etc; 2.22Control cabinet: The operating system and control system are integrated on an independent control cabinet; 2.23External reference size: 3500mm × 3000mm × 3060mm (W × H × D. Excluding footings, chimneys, and indicator lights, the specific dimensions are subject to the actual product. 3. General technical description 3.1 Chamder design The inner layer is made of herringbone shaped heavy corundum mullite, the outer layer is made of lightweight bricks, and the bottom of the furnace mouth brick is made ofLight Fire brick masonry, other parts of furnace entrance brick and furnace door plug brick are made of heavy corundum mullite. The molybdenum wire inside the furnace is suspended around the furnace for precise temperature control, and the temperature control thermocouple is located at the top of the furnace. Figure 1 shows the appearance of the equipment furnace body, and the specific appearance is subject to the actual product.
3.2 Control System Design Adopting an embedded touch screen+PLC control system, single point temperature control; Intelligent regulatorwith PID parameter Self-tuning function; The regulator collects thermocouple detection signals and triggers the module for temperature control. It also has multiple alarm protection functions such as deviation over temperature alarm and high temperature upper limit alarm. 3.3 Gas intake design The equipment is equipped with an air source installation rack, which is divided into two paths for air intake, one for nitrogen and another for hydrogen (each path is equipped with a pressure gauge to monitor pressure changes in real time); One path of nitrogen is separated into a branch for replacing the air inside the furnace. When the oxygen content in the furnace reaches a safe value, the main intake is opened again.Before entering the furnace, the gas enters the gas mixing tank in a certain proportion, and can choose to pass through the humidification box/directly enter the furnace, and finally enter the furnace. Among them, both nitrogen and hydrogen pipelines are equipped with one-way valves to prevent gas backflow in the pipeline
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