Honeycomb ceramic heat storage body with low adsorption capability and preparation method thereof

Abstract

The invention discloses a honeycomb ceramic heat storage body with low adsorption capability and a preparation method thereof. The honeycomb ceramic heat storage body with the low adsorption capability is sintered from the following components in parts by weight: 55 to 60 parts of white corundum powder, 8 to 10 parts of mullite, 10 to 15 parts of a-AL2O3 powder, 2 to 3 parts of SiO2 powder, 10 to15 parts of tricalcium phosphate, and 4 to 5 parts of high-temperature adhesive. The honeycomb ceramic heat storage body has high material compacting / low porosity, high high-temperature resistance / high chemical reaction heat, high impermeability, low adsorption capability, high desorption capability, low production cost, high energy-saving rate, low smoke emission temperature, and long service life.

Description

technical field [0001] The invention relates to a honeycomb ceramic regenerator with low adsorption capacity and a preparation method thereof, belonging to the technical field of industrial special ceramics for regenerative metal smelting furnaces. Background technique [0002] At present, the new regenerative high-temperature air combustion technology (HTAC) based on the traditional honeycomb ceramic regenerator / ceramic ball has been widely used in various regenerative systems such as iron and steel metallurgy, petrochemical industry, precision forging, and environmental protection filtration. In heating equipment, it can not only improve the combustion effect, save energy, but also reduce NO X Emissions of similar gases can effectively avoid environmental pollution. [0003] However, for a long time, traditional honeycomb ceramic regenerators have not been able to be applied to regenerative metal melting furnaces such as aluminum melting furnaces. The specific reason is t...

AI Technical Summary

Problems solved by technology

Therefore, at present, metal melting furnaces such as regenerative aluminum melting furnaces in China mainly use ceramic balls as heat storage carriers to prevent clogging. Even so, ceramic balls still need to be cleaned regularly, which is not only troublesome to use, but also very expensive to maintain

[0005] At present, the service life of traditional honeycomb ceramic regenerators in domestic regenerative metal smelting furnaces does not exceed 6 months, and the situation of regenerative aluminum melting furnaces is particularly serious, with an average service life of no more than 3 months When the small ball is used as the heat storage carrier, it must also be cleaned regularly. The most common use period is no more than 9 months, which is difficult to maintain and high in operating costs.

[0006] In view of the loose structure of traditional honeycomb ceramic regenerators, which are easily adsorbed by low melting point substances and block the pores, some domestic manufacturers have developed patented technologies such as "a new type of zirconium chromium corundum ceramic regenerator (200710034984.5)" , by adding zirconium (ZrO 2 ), chromium (Cr 2 o 3 ) and other elemental materials, it is intended to enhance the volume density of the traditional honeycomb ceramic regenerator and reduce the porosity through the change of the material formula, but because the basic preparation method has not changed, the method of extrusion molding is still used, resulting in The regenerator still has the problem of loose structure and weak corrosion resistance. The extruded honeycomb ceramic regenerator generally has a pore diameter of about 3 to 4mm, which is an angle hole, and the attachment is very easy to hang on the wall to block the hole. After the hole is blocked, The temperature rises suddenly, exceeding the load of the heat storage body itself, causing it to deform and soften, and finally collapse

At the same time, some domestic production companies have also developed patented technologies such as "a non-stick aluminum castable (CN201510015768.0), which also uses methods such as particle size optimization and particle reinforcement of micro-powder materials to achieve long-life use of materials. However, none of them solved the fundamental problem from the formulation and production process