Tungsten Purple Oxide Fuzzy Controlled Atmosphere Furnace Temperature

Purple tungsten furnace temperature control is one with a pure delay, inertia, time-varying and nonlinear characteristics in the process. Realize their intellectual control, to reduce power consumption, improve product quality, extend the life of purple tungsten furnace has a very important significance.

Purple tungsten furnace has three plus tropical, with each band by three triggers, SCR, heater, thermocouple temperature loop control circuit, the trigger signal is given by the fuzzy expert controller based on the results of intelligent control algorithm, The structure is basically the same and independent of each other, the temperature setpoint changes with slightly different processes.

Lower furnace, purple crystalline tungsten needle morphology presented; the higher the furnace, purple tungsten rod-like crystalline morphology is presented. By reduction test found that the use of purple crystalline tungsten needle preparation of tungsten powder finer, but with purple crystalline tungsten rod tungsten powder preparation phase. So in the production practice to produce more granular tungsten powder, must be adjusted through the process, the production of purple crystalline tungsten needle.

How many non-needle-shaped particles is generally used to measure the merits of purple tungsten products, APT size increased, ammonia flow rate increases, will cause an increase in non-needle purple particles of tungsten products, tungsten unity influence purple phase component; and appropriate to reduce calcination temperature, you can reduce the non-needle-shaped particles of tungsten products purple, offset the impact of these factors brought about; but drop too low, would affect the purple tungsten content, the product Pellet stove or knot. So purple tungsten furnace temperature is a very important process parameters can be used to make up and change the balance of other process parameters, so that product quality tungsten violet stabilized. Therefore, the temperature setting and monitoring, is the key to purple tungsten furnace process control.

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