Carbon-containing temperature measurement tube oxidation-resistance coating as well as preparation method and using method thereof

Abstract

The invention discloses a carbon-containing temperature measurement tube oxidation-resistance coating which comprises the following compositions in percentage by weight: 40-59.9 percent of fillers, 40-59.9 percent of binder and 0.1-0.4 percent of opacifier, wherein the fillers is silicon dioxide, and the binder comprises the following compositions: 27.15-39.9 percent of kaolin micropowder, 8-11 percent of boric acid, 1-2 percent of aluminum dihydrogen phosphate, 1-3 percent of silicon micropowder, 2.5-3.5 percent of yellow dextrin and 0.35-0.5 percent of chromium oxide. A preparation method of the coating comprises the following steps of: uniformly mixing the 40-59.9 percent of the silicon dioxide, 40-59.9 percent of the binder and 0.1-0.4 percent of the opacifier, and then ball milling at high speed on a ball mill to prepare the oxidation-resistance coating. A using method of the oxidation-resistance coating comprises the following steps of: adding water to the oxidation-resistance coating, uniformly mixing, spraying the mixture on a temperature measurement tube, roasting and then directly using. Therefore, the service life of the oxidation-resistance coating is prolonged from 23h to 30h, and prolonged by 30 percent.

Description

technical field [0001] The invention relates to coatings, in particular to anti-oxidation coatings for carbon-containing temperature measuring tubes. Background technique [0002] The infrared optical temperature measuring tube is used to monitor the temperature of the molten steel in the tundish, and the operating temperature is required to be around 1560°C, and the service life is ≥24 hours. However, the surface of the temperature measuring tube must be coated with a layer of anti-oxidation paint to increase the service life of the temperature measuring tube. Because most of the binding agents used in the existing anti-oxidation coatings are chemical binding agents (such as sodium silicate, etc.), the stability of the coating is reduced. Such as Chinese patent CN1035121A "oxidation-resistant coating containing graphite refractory material", Chinese patent CN1066078A "oxidation-resistant coating of aluminum-carbon refractory material and its preparation method". There are...

AI Technical Summary

Problems solved by technology

There are also anti-oxidation coatings that separate the binder from the additives, but they need to be mixed on site before they are used, and they need to be dried before they can be used. The above reasons make the service life of the temperature measuring device not long, at most 23 hours, it is also easier to crack, which increases the cost of production