In modern industrial production, refractories play a vital role, especially in high temperature environment, they can withstand extreme temperature and chemical erosion, and ensure the smooth progress of various technological processes. Molybdenum powder, as a high-performance refractory, has been widely used in many fields because of its unique physical and chemical characteristics, and has become an indispensable and important material in industrial production.

I. Characteristics of Molai Powder

The main component of Mo Lai powder is Mullite, and its chemical formula is [ALSIO], which is an aluminosilicate mineral. Molybdenum powder has the following remarkable characteristics:

(1) High fire resistance

The fire-resistant temperature of Molai powder is extremely high, usually above 1700℃, and even can withstand higher temperatures in some special cases. This characteristic makes it stable in high temperature environment without melting or deformation, thus providing a reliable guarantee for high temperature process. For example, in iron and steel smelting, glass manufacturing and other high-temperature industries, the refractory made of Molai powder can withstand the long-term erosion of high temperature in the furnace, ensuring the integrity and stability of the furnace structure.

(2) Low expansion coefficient

The thermal expansion coefficient of Molybdenum powder is very small, which means that when the temperature changes, the size of products made of Molybdenum powder changes very little, and cracks or deformation will not occur due to thermal expansion and cold contraction. This characteristic is particularly important for high-temperature equipment and processes that need accurate size control. For example, in precision casting, using Molybdenum powder as mold material can ensure the dimensional accuracy of castings and reduce the rejection rate caused by mold deformation.

(3) High purity and low impurity

Molai powder is pure in chemical composition, and its iron content and impurity content are extremely low. Low iron content can effectively reduce the oxidation reaction at high temperature and reduce the loss of materials; However, low impurity content can improve the corrosion resistance and erosion resistance of materials. This makes Molybdenum powder perform well in high-temperature processes with complex chemical environment. For example, Molybdenum powder can resist the corrosion of various acid and alkali substances and prolong the service life of refractories in high-temperature reaction furnaces in chemical industry.

(4) Good bulk density

Molai powder has a high bulk density, which makes the refractories made of it have good compressive strength and wear resistance. In high temperature environment, refractories often need to bear greater mechanical pressure and wear. Molybdenum powder with high volume density can effectively resist these external forces and maintain the integrity and stability of materials. For example, in the cement rotary kiln, the refractory brick made of Mo Lai powder can withstand the impact and wear of materials, and at the same time resist the erosion of high temperature to ensure the normal operation of the rotary kiln.

II. the application of Molai powder

Molybdenum powder has been widely used in many fields because of its excellent characteristics, especially in the fields of high temperature industry and precision casting, and its importance is self-evident.

(1) Precision casting

Molybdenum powder is one of the important raw materials in precision casting industry. In the precision casting process of stainless steel, alloy steel, carbon steel and other metals, Mo Lai powder is used to make the shell of casting mold. Its high fire resistance and low expansion coefficient can ensure the dimensional accuracy and stability of the mold at high temperature, thus improving the quality and yield of castings. For example, in the aerospace field, many complex metal parts need to be manufactured by precision casting, and the mold made of Molybdenum powder can meet these high-precision requirements and ensure the dimensional accuracy and performance of the parts.

(2) High temperature furnace lining

Refractory bricks and castables made of Molai powder are widely used in various high-temperature furnace linings, such as industrial furnaces, boilers and glass melting furnaces. Its high fire resistance and good corrosion resistance can effectively protect the furnace structure and prolong the service life of furnace lining. In the steelmaking furnace of iron and steel industry, Molai powder refractory can withstand the erosion and impact of high-temperature molten steel, ensuring the smooth progress of steelmaking process; In the glass manufacturing industry, the refractories made of Molybdenum powder can withstand the high temperature and chemical erosion in the glass melting process, ensuring the quality and production efficiency of glass.

(3) Ceramic industry

Molybdenum powder also has important applications in ceramic industry. It can be used as an additive of ceramic raw materials to improve the performance of ceramic products. For example, in the production process of ceramic tiles, ceramic tubes and other products, adding a proper amount of Molybdenum powder can improve the mechanical strength, wear resistance and heat resistance of ceramic products, reduce the firing temperature of ceramic products and save energy. In addition, Molai powder can also be used to make high-performance ceramic materials such as ceramic fibers, which are applied to aerospace, electronics and other high-tech fields.

(4) Other fields

In addition to the above main application fields, Molai powder also plays an important role in some special fields. For example, in the electronic industry, Molybdenum powder can be used to make insulating materials for high-temperature electronic components; In the field of chemical industry, Molai powder can be used to make pipelines and containers resistant to acid and alkali corrosion; In the construction industry, Molai powder can be used to make refractory coatings and fireproof materials to improve the fireproof performance of buildings.

III. Production Technology of Molai Powder

The production technology of Molai powder mainly includes the steps of raw material selection, calcination, crushing and screening. Firstly, high-quality aluminosilicate minerals are selected as raw materials, and after high-temperature calcination, impurities in the raw materials are volatilized to generate mullite crystals. Then, the calcined materials are crushed and screened to obtain products with different particle sizes. In the production process, strictly controlling the calcination temperature and time, as well as the accuracy of crushing and screening, is the key to ensure the quality of Molai powder. High-quality Molai powder should have uniform particle size distribution, high purity and good crystallinity to meet the requirements of different application fields.

IV. Market Prospect of Molai Powder

With the continuous development of industrial technology and the increasing complexity of high-temperature technology, the performance requirements of refractories are getting higher and higher. As a kind of high-performance refractory, the market demand of Molai powder shows a steady growth trend. Especially in the fields of precision casting, high-temperature furnace lining and ceramic industry, Mo Lai powder has a broad application prospect. In addition, with the increasingly stringent requirements of environmental protection, Molai powder, as a refractory material with low impurity and low energy consumption, also meets the requirements of sustainable development and will occupy a more important position in the future market.

V. Summary

Molybdenum powder stands out in the field of refractories because of its excellent characteristics such as high fire resistance, low expansion coefficient, high purity and good bulk density, and has become the first choice for many high-temperature processes and precision casting industries. Its extensive application fields and increasing market demand fully prove the important value of Molai powder. With the continuous progress of science and technology and the continuous improvement of production technology, the performance of Molai powder will be further improved, and its application scope will be continuously expanded, providing a more reliable guarantee for the development of industrial production.