A high-temperature granulation machine for resin bonded products and a high-temperature granulation method thereof

Abstract

The invention relates to a resin binding product high temperature high temperature granulator and a high temperature granulation method, the method comprises the following steps: heating a rotating cylinder to the temperature of 40-120 DEG C, adding a granulation raw material in the rotating cylinder for mixing, wherein the rotating speed of the rotating cylinder is 5-30rpm, performing high speed intense agitation through a high speed stirring rotor (the speed is 1000-2000rpm) over the rotating cylinder for stirring for 10-60 minutes, finally discharging, and cooling to the room temperature to prepare the finished product mud material. The mud material has stable grain composition and low fine powder quantity, so that the product appears very excellent porosity, volume density and stable strength property, is directly and rapidly dried at anaphase of granulation, and the drying equipment is not required for being added. The technology appears flexible, and the land occupation is small. The technology is not influenced by harsh environment, and has little influence by change of environment, even has no influence by change of environment. According to the high temperature granulation technology, the production cost appears very excellent, compared with a traditional normal temperature granulation technology, the comprehensive cost can be saved by more than 50%.

Description

technical field [0001] The invention relates to the field of making mud for refractory ceramics and carbon products, in particular to the field of granulation technology for resin-bonded products. Background technique [0002] The granulation process of prior art generally comprises two steps of granulation and drying: [0003] The purpose of granulation: to solve the uniform mixing of low specific gravity materials (such as graphite) and high specific gravity aggregates (such as fused alumina, magnesia, zirconia, silicon oxide, etc.), eliminate the orientation of graphite, and homogenize all raw materials to make into mud with good properties. [0004] 1. If the orientation is compressed in a parallel direction, due to the shrinkage between the graphite layers, the creep deformation capacity will increase, the thermal stress will decrease, and the expansion will increase (which will reduce the flexural strength of the product by nearly half); [0005] 2. If the orientatio...

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Problems solved by technology

[0011] 3. The water or volatile liquid should be as little as 0.5-3% as much as possible, and the material that is too wet will easily cause cracks

[0015] The granulation process of the existing technology generally adopts normal temperature granulation, and the granulation temperature needs to be 25±5°C to ensure the viscosity and plasticity of the resin; the humidity needs to be controlled at 45~60% to ensure the stability of the volatile matter of the mud, that is, the plasticity , so it is necessary to add a large amount of resin and solvent to reduce the viscosity of the resin and solve the wetting problem of the material. Usually the discharge temperature is 45~60°C, and the discharge contains a large amount of solvent about 3~5%. The volatilization of the solvent causes a large amount of heat loss, which requires Add a large amount of heat to dry the excess solvent. The method of the prior art is generally to add the discharged material to the subsequent drying cylinder for drying after the granulation is completed. The mud material is rolled and dispersed in the drying cylinder, the effective particles are reduced, and the fine powder Increase (up to 10%), more dust during molding, and poor environment. After the material is completed in the drying cylinder, it is then pressed and molded. The strength of the product fluctuates greatly and the stability is poor. To solve this problem, it is usually necessary to increase the amount of resin and increase the solvent. Solve the problem and bring about vicious cycle of material preparation results

Due to the increase of the amount of resin and solvent, the drying time is prolonged, the mud is rolled in the drying cylinder, and the dispersion time is dried, the effective particles are reduced, the fine powder is increased, and the cost is greatly increased.

[0016] In the prior art, in order to solve the above-mentioned technical problems, the binders, aggregates, additives, powders, etc. used are preheated to a certain temperature. However, since the granulation temperature in the early stage cannot be too high, drying must also be carried out after the granulation is completed, so the operation Inconvenient, large energy waste and ineffective

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