2023-10-23

Operating Techniques for Graphite Crucibles

Graphite crucible is a very excellent smelting tool that has been praised by people in the metal smelting industry. Its usage method is simple. Below, we will introduce some matters that need to be mastered when using it.The main uses of graphite crucibles include evaporation, concentration or crystallization of solutions, and burning of solid substances. It should be noted that although graphite crucibles have strong temperature adaptability and can be directly heated, they cannot be suddenly cooled after heating. If necessary, use crucible pliers to remove the crucible instead of using technical means to quickly cool it. Because it is directly heated and the heated contents are metals with extremely high dissolution temperatures, the required energy and safety requirements are relatively high. Therefore, during the heating process of the crucible, it is necessary to have a stable environment to ensure the safety and effectiveness of the operation. In general, manufacturers choose to

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

2023-02-08

Graphite flotation method

Floating is a commonly used and important mineral method. Graphite has good natural floating. Basically, all graphite can be purified by floating methods. In order to protect graphite scales, most of the graphite flotation uses multiple sections of processes. Graphite flotation collecting agents are generally used for kerosene, with a dosage of 100 to 200g/t. The foaming agent is generally used with pine or butad ether, and the amount is 50 to 250g/t.

The difference between expanded graphite and graphene

Graphene and expanded graphite exhibit different behaviors in both material structure and application fields. Expanded graphite can be used as a raw material for the production of graphene. For example, the Hummers method can be used to obtain graphene oxide through ultrasonic expansion of graphite oxide. When the expanded graphite is peeled off into a single piece, it becomes graphene. Peeling off into several layers is a few layers of graphene, and graphene nanosheets can be prepared from about ten to thirty layers.Practical application fields of expanded graphite1. Application of Medical MaterialsMedical dressings made of expanded graphite have many excellent properties and can replace most traditional gauze.2. Application of Military MaterialsCrushing expanded graphite into micropowders has strong scattering and absorption properties for infrared waves, making it an excellent infrared shielding material and playing an important role in modern optoelectronic warfare.3. Application

2023-10-09

Application characteristics and advantages of self-lubricating bearings

1. Good wear resistance, low friction coefficient, and long service life.2. Having an appropriate amount of elasticity and plasticity can distribute stress over a wider contact surface, improving the bearing capacity.3. It can reduce vibration, reduce noise, prevent pollution, and improve labor conditions for machinery.4. During operation, a transfer film can be formed to protect the grinding shaft without any biting phenomenon.5. The hardness requirements for grinding shafts are low, and shafts that have not been quenched and tempered can be used, thereby reducing the difficulty of machining related parts.6. Thin walled structure, lightweight, can reduce mechanical volume.7. At present, it has been widely used in various sliding parts of machinery, such as printing machines, textile machines, tobacco machinery, micro motors, automobiles, motorcycles, and agricultural and forestry machinery.

2023-05-10

Application of Chinese carbon graphite

With the development of social industry, graphite has been regarded as one of the important industrial minerals at home and abroad. In recent years, with the development of graphite processing technology, graphite parts have played an important role in all walks of life.China-carbon graphite workpiece maintains the original scales graphite original resistance, corrosion resistance and physical properties, high temperature resistance of 3000 degrees, low temperature-204 degrees, pressure resistance is greater than 800kg/cm2, and the pressure resistance is large in 450 degrees air. Lost 1%, rebound rate of 15-50%, strong self-lubrication performance.According to the needs of different industries, the graphite materials are made into different Chinese carbon graphite pieces. In order to improve the performance of graphite, graphite tablets are specially treated. It plays an important role in many fields such as wear -resistant and antioxidant.With the continuous development of science an

2023-08-14

What are the processing methods for different types of carbon materials

(1) Processing of graphite electrodes. The processing of electrodes can be divided into three processes: boring and rough flat end faces, turning outer circles and fine flat end faces, and milling threads.(2) Processing of conical joints. The processing of conical joints can be divided into six processes: cutting, flat end face, turning conical surface, milling thread, drilling and installing bolts, and slotting.(3) Processing of cylindrical joints. The cylindrical joint can be divided into three processes: cutting, flat end face, and thread milling.(4) Processing of carbon blocks. The processing of carbon blocks mainly involves flat six surfaces.(5) Processing of special-shaped carbon materials. According to user needs, perform cutting, turning, grinding, boring, slotting, and planing. For products with special requirements, more precise processing is required after normal processing.

2024-03-06

Graphite: Uncovering the unique properties and wide applications of this amazing material

Graphite, a seemingly unremarkable mineral, hides a multitude of amazing properties and applications. It is not only an ancient material for writing and painting, but also a key element of modern industry and technology.The unique properties of graphite stem from its layered structure. Each layer of graphite is tightly bound by carbon atoms through covalent bonds, while the layers interact with each other th

2023-11-20

Inspection of graphite crucibles before application

Graphite crucibles have excellent thermal conductivity and heat resistance during the pre application inspection work. During the entire high-temperature application process, the linear expansion coefficient is small, and they have certain strain resistance performance for rapid heating and quenching. Strong corrosion resistance to acid and alkaline solutions, with high-quality organic chemical reliability. It is widely used in metallurgical industry, forging, mechanical equipment, chemical plants and other industries for smelting alloy tool steel, rare metals, and aluminum alloys, and has good practical safety engineering effects.Generally speaking, in the inspection work of graphite crucibles before application, the following key aspects should be ensured:1. The first step is to check the graphite crucible for cracks before work. If there are no cracks, the graphite crucible needs to be heated to 600 ° C and dried sufficiently.2. There should be no water stored around the furnace or

2023-08-08

Varieties and uses of carbon rods

Carbon rods are made from carbon or graphite materials as the substrate. Carbon rods can be used as electrodes for arc discharge in various electrical equipment that generate thermal or light energy. During arc discharge, high temperature and strong luminous intensity are generated.Carbon rods can be divided into film projection carbon rods, high color temperature photography carbon rods, ultraviolet linear and sunlight type carbon rods, photographic plate making carbon rods, carbon arc air gouging carbon rods, precision casting carbon rods, electrolytic carbon rods, arc lighting carbon rods, spectral carbon rods, battery carbon rods, and welding carbon rods according to their purposes.Arc lighting carbon rods are used in searchlights, as well as in strong arc lamps for film projection, photography, plate making, and ultraviolet light sources. Carbon arc air gouging carbon rods are used for arc cutting of metal materials, drilling, eliminating casting risers and other defects. Spectra