Vacuum granulation method for refractory materials

Abstract

The invention discloses a high-temperature fire-proof material granulating method, which is characterized in that: first the material enters the material distributor, to be forced by three horizontal wing-shape mixing lodicules and vertical mixing shovel to make frequency variable speed-adjustable circle motion, therefore, the material can writhe by the shearing forces in horizontal and vertical directions to attain uniform material; wherein, the set granulating condition comprises: time: 800-1000s; temperature: 40-50Deg. C; and when reaching said condition, opening the vacuum valve, to adjust the pressure in -0.06-0.08MPa, and the mixing lodicules and shovel granulate in variable speed again, and vacuuming the gas of mixed material to improve the density more, reduce the hole rate and improve eth size and uniformity of particles.

Description

technical field [0001] The invention discloses a high-temperature refractory material granulation molding method. Background technique [0002] Refractory products are generally used in high-temperature environments above 1580°C, and their products must maintain normal work in this high-temperature environment. Since most refractory raw materials are made of various powders and ultrafine powders plus binders and sintered in proportion, the powders are processed into Particles of a certain shape and size have a great influence on the quality of finished products, so the granulation method has become an important factor affecting the quality of refractory products. At present, mixing granulation equipment is basically used in China for granulation processing. The general equipment is a mixing granulator. The basic processing method is: mix the raw materials in proportion and put them into the batching device, add a binder, and rotate through the device. Stir and mix the mater...

AI Technical Summary

Problems solved by technology

However, due to the requirements of high temperature resistance, thermal shock resistance, strength, and corrosion resistance of refractory materials, the particle size of the finished material is very high in product production, and the commonly used granulation methods are likely to cause particle size, uniformity, etc. The requirements are difficult to grasp. Due to the inconsistent particle size and uniformity, it is easy to produce cracks, partial clarity, deformation and other defects in the subsequent processing and use, which will reduce the quality of the product or increase the hazard.

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