Properties and preparation of manganese carbide Mn3C powder

Manganese carbide Mn3C powder properties

The physical and chemical properties of Mn3C: soft crystalline solid or bright needle-like crystals, the relative density is 6.89. It is insoluble in concentrated sulfuric acid and nitric acid, but can be decomposed by water or dilute acid to produce manganese hydroxide, hydrogen and hydrocarbons. It burns quickly in oxygen and easily reacts with fluorine and chlorine.

 How is manganese carbide Mn3C powder produced?

A method for preparing manganese carbide by gas-based reduction of manganese oxide. After mixing manganese oxide, binder and water, the agglomerates are dried, and the obtained dry agglomerates are placed in a mixed atmosphere containing H2, CH4, CO and N2, and calcined at a temperature of 1100-1300°C, which is manganese carbide. Products. The specific steps are as follows: -325 mesh mass percentage is 90% analytically pure manganese dioxide and trimanganese tetroxide, 0.5% CMC and 7.5% moisture are mixed, granulated, and dried. The dried sample was calcined in an atmosphere of 10% CH4, 30% H2, 10% CO, and 50% N2 at a calcination temperature of 1150°C and a calcination time of 120 minutes, and then calcined in a N2 atmosphere. Cooled to room temperature, the calcined product obtained is a manganese carbide product,

Overview of manganese carbide Mn3C powder

Manganese carbide is a stable compound formed from manganese and carbon. The molecular formula is Mn 3 C, the melting point is about 1520°C, and the density is 6.89 g/cm 3. Manganese carbide burns rapidly in oxygen and decomposes in water to produce manganese hydroxide, methane and hydrogen. It is easy to react with acid to decompose, easy to react with chlorine and fluorine, and easy to decompose into manganese and carbon at high temperature.

The heat of formation of manganese carbide is △from(298K)=-(15.06±12.55)kJ/mol. When smelting high-carbon ferromanganese or manganese-silicon alloy in a blast furnace or electric furnace, what is obtained is not pure manganese or manganese silicide, but manganese carbide. Therefore, the heat absorbed by the reaction is less than the heat reduced to metallic manganese or manganese silicide. That is, the reaction initiation temperature is relatively low. Therefore, high-carbon ferromanganese contains more carbon. When smelting the silico-manganese alloy, the generated manganese carbide Mn3C encounters silicon to generate silicide MnSi, which is more stable than Mn3C, and extrudes the carbon in Mn3C to obtain a manganese-silicon alloy.

Due to the complicated preparation process of electrolytic manganese metal, manganese carbonate ore and manganese oxide ore are mainly obtained through acid hydrolysis, impurity removal and electrolysis. The manganese carbonate ore acid leaching method can directly use sulfuric acid and manganese carbonate to produce a manganese sulfate solution, and then prepare electrolyte through a series of processes such as neutralization, purification, and filtration, and add selenium and other additives. Sulfur dioxide, ammonium sulfite, etc. can enter the electrolytic cell for electrolysis; the process of manganese oxide reduction-acid leaching method to produce electrolytic manganese is different from the production process of manganese carbonate. The main reason is that manganese dioxide does not react with sulfuric acid under normal conditions and must be treated as divalent manganese, and then reacted with sulfuric acid to prepare a manganese sulfate solution. The treatment method is generally roasting, which is to mix manganese dioxide with a reducing substance (usually coal), and then heat it in an airtight manner. C reduces tetravalent manganese to divalent at a certain temperature. Manganese is pulverized and acid leached to remove impurities to obtain electrolyte. 2) The melting temperature is high, as high as 1300℃～1500℃. According to the analysis of the Mn-C binary phase diagram, the melting point of the Mn-C system is as high as 1300°C. In order to make the reaction complete, high temperature must be ensured, and induction furnace smelting is often used. 3) Since the whole process is in a molten state, the requirements for the materials and refractories of the roasting equipment are relatively high. At present, my country's industry is developing in the direction of environmental protection and energy conservation. Therefore, it is of great practical significance to develop new technologies for low-temperature, economical, clean, and efficient preparation of manganese carbide.

Application of manganese carbide Mn3C powder

Manganese carbide Mn3C powder is used in hard coatings, indicators, welding materials, spray tools, steelmaking industry, aerospace and other fields.

As a grain refiner for cermet and tungsten carbide, manganese carbide can significantly improve the properties of the alloy.

Manganese carbide can be used to prepare trimanganese tetroxide. Manganese tetroxide is one of the important raw materials for the production of manganese-zinc ferrite soft magnetic materials in the electronics industry and has a wide range of uses. According to reports, the manganese carbide hydrolysis method is one of the preparation methods of manganese tetroxide powder. The research discloses a method for producing trimanganese tetroxide with carbon-manganese alloy, a one-step method for producing trimanganese tetroxide with low selenium and high specific surface area from carbon-manganese alloy, and a method for preparing Mn3O4 nano powder by hydrolysis and oxidation of manganese carbide. Manganese (transition metal carbide) hydrolysis oxidation method to prepare Mn3O4 powder does not involve catalysts, acids, alkalis and other chemical reagents. Compared with the electrolytic metal manganese powder suspension oxidation method to prepare Mn3O4, it is obviously a veritable green process. However, the preparation of manganese carbide is the key to the hydrolysis of manganese carbide to prepare Mn3O4 materials. This method melts 92% electrolytic metal manganese (high purity) and 8% graphite in a 50kg induction furnace (temperature up to 1500°C), puts the metal manganese and graphite in a graphite crucible, and the graphite is broken into fine particles . The pellets are melted in the liquid phase alloy as much as possible. After the charge is fully melted, it is kept for a certain period of time, and then rapidly cooled to obtain a manganese carbide alloy block. The alloy block is pulverized into powder.

Manganese tetroxide is one of the important raw materials for the production of manganese-zinc ferrite soft magnetic materials in the electronics industry and has been widely used.

Manganese carbide can be used to prepare transformer oil. The method is simple and easy to implement, suitable for large-scale production, can prolong the replacement time of transformer oil, and reduce potential safety hazards.

Manganese carbide Mn3C powder price

The price of manganese carbide Mn3C powder varies randomly with factors such as production cost, transportation cost, international situation, exchange rate, and market supply and demand of manganese carbide Mn3C powder. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for manganese carbide Mn3C powder, please feel free to contact us for the latest price of manganese carbide Mn3C powder.

Suppliers of manganese carbide Mn3C powder

As a global supplier of manganese carbide Mn3C powder, Tanki New Materials Co., Ltd. has extensive experience in advanced engineering material properties, applications and cost-effective manufacturing. The company has successfully developed a series of powder materials (including boron carbide, aluminum carbide, titanium carbide, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.