Low-temperature-cured high-temperature-resistant carbon graphite material binder as well as preparation method and use method thereof

Abstract

The invention discloses a low-temperature-cured high-temperature-resistant carbon graphite material binder as well as a preparation method and a use method thereof, and relates to the technical fieldof refractory materials. The binder disclosed by the invention comprises the components in percentage by mass: 40-60% of resin, 15-30% of graphite powder, 20-35% of filler and 5-8% of a diluent. The preparation method of the binder comprises the steps: preparing the resin and the filler, and preparing the raw materials according to the mass fraction of each raw material; adding the diluent into the resin, stirring, and diluting the viscosity to 100-150 mPa*s for later use; grinding the filler into powder, and uniformly mixing the powder with graphite powder to obtain mixed powder; and slowly adding the diluted resin solution into the mixed powder at a constant speed, and continuously stirring and dispersing until the solid phase and the liquid phase are uniformly mixed to obtain the binder. When the binder is used, the binder is smeared on the clean connecting surface of a carbon-graphite material to be bonded, the carbon-graphite material is compressed, bonded and baked for 1 h at thetemperature of 80-130 DEG C, and curing is completed. The binder disclosed by the invention has the advantages of high bonding strength, low cost, convenience in use, good high-temperature resistance, low-temperature rapid curing and the like.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and relates to a refractory material binder, in particular to a low-temperature curing high-temperature-resistant carbon-graphite material binder and a preparation and use method thereof. Background technique [0002] Carbon graphite materials have the advantages of light weight, electrical conductivity, thermal conductivity, heat resistance, thermal shock resistance, high purity, etc., and have high thermal stability in non-oxidizing environments. They are widely used in electrical and metallurgical industries, and can be made into Electrodes, crucibles, molds, etc. However, due to the brittleness of carbon-graphite materials, the manufacture of traditional crucibles and molds generally uses integral carbon-graphite blanks for machining, and a large amount of waste is generated during the product manufacturing process. The production cost per unit of product is high, and it is diffi...

AI Technical Summary

Problems solved by technology

However, due to the brittleness of carbon-graphite materials, the manufacture of traditional crucibles and molds generally uses integral carbon-graphite blanks for machining, and a large amount of waste is generated during the product manufacturing process. The production cost per unit of product is high, and it is difficult to process products with complex shapes.

Even if the products are combined by fasteners of homogeneous materials, there are still shortcomings such as stress concentration, short service life, and leakage of the sealing contact surface that are difficult to overcome.

In the prior art, patent CN109777305A discloses a graphite refractory binder and its preparation method, which can withstand high temperature of 900°C and maintain mechanical strength, but its composition is complex, the curing cycle is long, and the use cost is high; patent CN1428391A discloses a room temperature curing type high temperature The binder has a temperature resistance of 3000°C, but it uses boron carbide ceramics as raw material, the cost is high, the curing time is as long as 4 to 24 hours, and the bonding efficiency is low; the patent CN1289813A discloses a heat-resistant carbon material binder, which requires First cured at low temperature, and then put into use after high temperature heat treatment at 800-1500°C. The heat treatment conditions are harsh, the process cost is high, and it is difficult to effectively apply