In the field of high temperature industry, refractory plays an indispensable role, and its performance is directly related to the service life and production efficiency of industrial furnaces. Refractory plastic refractory, as a special kind of refractory, has attracted much attention in modern industry because of its unique performance and wide application. This paper will introduce the characteristics, application fields and future development trend of refractory plastic refractory in detail.

I. Definition and composition of refractory plastic refractory

Refractory plastic refractory is a kind of amorphous refractory with plasticity, which consists of refractory aggregate, powder, binder and admixture. Its main components include refractory raw materials such as bauxite, corundum and mullite, and the binder is usually aluminate cement, phosphate or organic binder. Admixtures are used to improve the construction performance and high temperature performance of plastic refractory, such as plasticizers and water reducing agents.

II. Characteristics of refractory plastic refractory

(1) Plasticity

Plastic refractory, a refractory material, is characterized by its good plasticity, which can be molded under certain pressure, and is suitable for lining construction with complex shapes. This plasticity enables it to better fit the furnace body structure, reduce construction gaps and improve the integrity of the furnace lining during construction.

(2) High temperature performance

High fire resistance: The fire resistance of refractory plastic refractory is usually above 1600℃, and that of some high-alumina plastic refractory can reach above 1800℃. This makes it stable in high temperature environment without softening or melting.

Thermal shock resistance: Due to the uniformity of its internal structure and good toughness, the refractory plastic refractory has excellent thermal shock resistance. Under the condition of rapid temperature change, it can effectively resist the damage of thermal stress and reduce the occurrence of cracks.

Corrosion resistance: Refractory plastic refractory has good corrosion resistance to acidic or alkaline slag, which can effectively resist chemical corrosion and prolong the service life of furnace lining.

(3) Construction performance

Convenient construction: Refractory plastic refractory can be formed manually or mechanically with simple tools without complicated equipment. Its plasticity enables it to adapt to various complex construction environments, with fast construction speed and high efficiency.

Good integrity: after construction, the refractory plastic refractory forms a whole, which reduces the existence of brick joints, thus reducing the risk of heat loss and slag penetration, and improving the sealing and heat preservation performance of the furnace lining.

III. Application fields of refractory plastic refractory

(1) Metallurgical industry

In metallurgical industry, refractory plastic refractory is widely used in lining construction of blast furnace, hot blast stove, converter and electric furnace. Its good corrosion resistance and thermal shock resistance can effectively resist the corrosion of high temperature slag and furnace gas, prolong the service life of furnace lining and improve production efficiency.

(2) Building materials industry

In building materials industry, refractory plastic refractory is mainly used for lining of high-temperature equipment such as glass kilns and cement rotary kilns. Its excellent thermal insulation performance and thermal shock resistance can effectively reduce energy consumption, improve product quality, and reduce maintenance times and maintenance costs of equipment.

(3) Chemical industry

In the chemical industry, refractory plastic refractory is used as the lining of various high-temperature equipment such as reaction furnaces and cracking furnaces. Its good chemical stability and corrosion resistance can effectively resist the corrosion of chemical media and ensure the smooth progress of the production process.

(4) Other fields

Refractory plastic refractory is also widely used in lining of high-temperature equipment such as ceramic sintering furnace, heating furnace and annealing furnace, as well as sealing and heat preservation of high-temperature pipes, valves and other components. Its diversified performance enables it to meet the needs of different industrial fields.

IV. Development Trend of Refractory plastic refractory

(1) High performance

With the continuous development of industrial technology, the performance requirements of refractory plastic refractory are getting higher and higher. In the future, the refractory plastic refractory will develop in the direction of higher refractoriness, higher strength and lower thermal conductivity, so as to meet the requirements of harsh working conditions such as high temperature, high pressure and strong corrosion.

(2) Environmental protection

Under the background of increasingly strict environmental protection policies, the production of refractories in plastic refractory will pay more attention to environmental protection. By optimizing raw material formula and production process, energy consumption and pollutant emission are reduced, and more environmentally friendly refractory plastic refractory products are developed.

(3) intelligence

Combined with modern information technology, the production and construction of refractory plastic refractory will be intelligent. By means of sensor technology and automatic control technology, the parameters such as temperature and stress of furnace lining can be monitored in real time, so as to realize real-time monitoring and early warning of furnace lining state and improve the safety and reliability of furnace lining.

V. Conclusion

Refractory plastic refractory, as an important unshaped refractory, has been widely used in high-temperature industry because of its excellent plasticity, high-temperature performance and construction performance. With the continuous progress of industrial technology, refractory plastic refractory will develop in the direction of high performance, environmental protection and intelligence, which will provide more reliable guarantee for the development of high temperature industry.