2023-04-03

The shortcomings and prevention of graphite mold heat treatment process

Several physical and chemical indicators that need to be understood when selecting graphite materials

Graphite is an allotrope of elemental carbon, where each carbon atom is surrounded by three other carbon atoms (arranged in a honeycomb like pattern with multiple hexagons) that are covalently bonded to form covalent molecules. Due to its excellent properties, graphite is used to make many materials. Below are several physical and chemical indicators that need to be understood when selecting graphite materials:1. Average particle diameter of the materialThe average particle diameter of a material directly affects its discharge condition. The smaller the average particle size of the material, the more uniform the discharge of the material, the more stable the discharge condition, and the better the surface quality. For forging and die-casting molds with low surface and precision requirements, it is usually recommended to use materials with coarser particles; For electronic molds with high surface and precision requirements, it is recommended to use an average particle size of 4 μ Mater

2023-08-29

Types of products impregnated with graphite

(1) Small specification graphite electrodes and joint blanks, various specifications of graphite anodes, fine structure, high-strength, and high-density graphite. These products need to have high density and strength, as well as low electrical resistivity, so the baked semi-finished products are first impregnated with coal tar pitch and then graphitized.(2) Diaphragm type salt solution electrolysis cell graphite anode. Graphite anodes impregnated with coal tar pitch can generally last for 8-9 months, while graphite anodes that are not impregnated can only last for 5-6 months. The main reason for affecting the lifespan of graphite anodes is that the electrolyte penetrates into the pores of the anode, while hydroxide ions, sulfate ions, and hypochlorite ions in the electrolyte discharge on the anode, generating primary oxygen. This initial oxidation reaction of oxygen on the anode causes chemical corrosion, which accounts for about half of the loss. Additionally, chemical corrosion weak

2023-04-10

What are the quality characteristics of graphite model

Graphite has a lot of different high -quality characteristics. It is widely used in the metallurgical industry forging, the setting glass of mezzanine, and the industrialization of semiconductor materials. What are the high -quality characteristics of graphite mold? Let's take a look with graphite products manufacturers.1. High -quality heat transfer and conductivity. The conductivity of graphite molds is 100 times higher than that of ordinary mining companies. The heat transfer is beyond metal composite materials such as steel, iron, and lead. The heat transfer coefficient decreases with the temperature, and even at a very high temperature, the graphite becomes anrmal insulation.2. Very good thermal resistance. The solution point of graphite is 385050 ° C, and the melting point is 4250 ° C. Even if it is burned by high temperature, high voltage and electricity, the net damage is not large, and the line expansion coefficient is not large.3. Excellent thermal shock -resistant character

2023-03-08

Introduce the asphalt rubber pendant penetration processing process

The general operating process of graphite immersion is after being loaded into the product, first vacuum packaging (gas in the gas in the pores in the pores of the product) and then put it in the impregnation agent to submerge the product, then pressure it to the liquid level, so that Essence It is used for different intentions, and the standards of impregnation agent processing process are not thorough. Below, I will introduce the asphalt rubber mud impregnation processing process of graphite board in detail.The whole process of processing the processing technology of asphalt rubber -soaking small graphite board, electrode connector and its graphite anode board:First of all, the semi-finished processing surface of the graphite board was burn, and then put it into the product box and put it in the temperature of about 4 hours in the temperature of about 240-Soot. After the heat, the product is quickly installed into the impregnation tank with the iron frame (the immersion can be heate

2023-02-20

It is critical to properly clean up graphite molds

Like other objects, graphite molds must be cleaned up after a long -term application. This is also a key factor in carrying out maintenance of graphite molds, and after cleaning up, the next manufacturing can be carried out immediately. As a result, the cleaning of graphite molds is very critical.If you want to achieve good practical effects and improve work effectiveness, proper operation steps are also crucial. During the entire process of cleaning the graphite mold, professional equipment maintenance management is created in the connection between the requirements and the actual operation. In order to complete the cost benefits, you must pay more attention when cleaning up. Especially for the different positions of graphite molds, the selected cleaning method is also likely to have a difference.Properly grasp the cleaning method of graphite molds and operate in accordance with the actual operation, which can increase the use period of the machine and equipment at a very large level

2023-10-18

What is the purpose of spherical graphite?

Spherical graphite has a wide range of market applications, widely used in industry, agriculture, and mining. It has a wide range of applications and is an important additive material in industrial production. So where are spherical graphite used.1. Spherical graphite as refractory material: The graphite structure and its related products have the properties of high temperature resistance and high strength, and can be mainly used in the metallurgical machinery industry for graphite crucibles and other manufacturing processes.2. Spherical graphite as a conductive material: used for manufacturing electrodes, carbon tubes, positive electrodes for mercury rectifiers, telephone parts, television tubes, etc.3. Spherical graphite as a wear-resistant lubricating material: graphite is commonly used as a lubricant in the mechanical industry. Lubricants typically cannot be used at high speeds, temperatures, and pressures, and wear-resistant materials can be graphite at high sliding speeds.4. The

2023-08-21

The main production process of graphite electrodes

(1) Calcination. Both petroleum coke and asphalt coke need to be calcined at a temperature of 1350 ℃ to fully remove the volatile matter contained in the carbonaceous raw material and improve the true density, mechanical strength, and conductivity of the coke.(2) Crushing, screening, and batching. Crush and screen the calcined carbon raw materials into designated size aggregate particles, grind some coke into fine powder, weigh according to the formula, and aggregate to form a dry mixture of various particles.(3) Mix and knead. Mix and knead the dry mixture of various particles with a certain amount of binder in a heating state to form a plastic paste.(4) Forming. Under external pressure (extrusion molding) or high-frequency vibration (vibration molding), the paste is pressed into a certain shape and high density of raw electrodes.(5) Roasting. Place the raw electrode in a specially designed roasting furnace, and use metallurgical coke powder to fill and cover the raw electrode. At a

2023-03-28

The main characteristics of artificial graphite

Crystal structure

Do you know what is the difference between graphite powder and coal powder?

The chemical elements of the two are the same, but the structure is completely different. The coal is a molecular crystal, and the graphite is a atomic crystal. Usually we usually say that C powder is molecular crystals.Graphite: Natural crystal graphite, shaped like fish phosphorus, is a hexagonal crystal system, with layer -like structure, high temperature resistance, conductivity, heat conduction, lubrication, plasticity, acid and alkaline resistance. The scale graphite is divided into four categories according to the fixed carbon content: high pure graphite, high carbon graphite, medium carbon graphite, low -carbon graphite.Graphite powder is soft, gray -black; raw materials have heat -resistant conductivity, which can be used as refractory insulation materials, conductive raw materials and wear -resistant moisturizing raw materials. Graphite's unique process is processed into milk products. It is smooth and exquisite in viewing. It must use containers such as barrels and other co