2023-03-14

Introduction to the use of expansion graphite

The expansion graphite was discovered in the early 1960s. Many countries like to use it to study, so that many unexpected results can be achieved. The so -called expansion can be increased by more? That's right, more than double or even double! It is new carbon material! Many people don't know much about expansion graphite!Graphite crystals are two -way large -molecular layer -like structures. The C atom in each plane is combined with the C -C co -price bond, and the layer is combined with weaker Van Dehua.The layered structure of graphite is very typical. Each layer is a carbon atomic layer. The carbon atom in the layer is a strong covalent bond with SP2 hybrid orbit, that is, 1 2S electronics and 2 2P electronic hybridization, etc. The hybrid track of the price is located on the same plane and forms σ bonds each other, while the two unsteady 2P electrons are perpendicular to the plane to form a two -key π. This layered structure of graphite makes a certain gap between layers. Theref

2023-11-08

Graphite purification method

Graphite is a high-energy crystalline carbon material, which has high application value in high-performance materials due to its unique structure and characteristics such as conductivity, thermal conductivity, lubrication, high temperature resistance, and chemical stability. It is widely used in fields such as metallurgy, machinery, environmental protection, chemical engineering, fire resistance, electronics, medicine, military industry, and aerospace, and has become an essential non-metallic material for modern industry and the development of high, new, and cutting-edge technologies, The position in the development of the national economy is becoming increasingly important, and international industry experts predict that the 20th century will be the century of silicon, and the 21st century will be the century of carbon.Natural graphite in China has good geological conditions, wide distribution, abundant resources, and good quality, with reserves and production ranking first in the wo

2023-08-25

Chemical properties of graphite and carbon materials

Carbon materials are chemically inert in non oxidizing media. Under normal temperature and pressure, no chemical changes will occur. Except for long-term immersion in nitric acid, hydrofluoric acid, or in fluorine, bromine, and other strong oxidizing atmospheres, interlayer compounds will slowly form. It is not corroded by other acids, bases, and salts, and does not interact with any organic compounds. There is no significant oxidation phenomenon of graphite within 450 ℃ in the air. It only reacts with water vapor above 700 ℃ and with CO and CO2 above 900 ℃. The temperature at which graphite produces carbides with certain metal and oxide powders is mostly above 1000 ℃.The chemical reactions of carbon materials can be divided into the following three types:(1) Gasification reaction and high-temperature oxidation reaction;(2) Solid solid reactions with metals, ceramics, etc;(3) Formation reaction of interlayer compounds.

2023-05-24

Graphite application

1. The oxidation and reduction method is used to synthesize graphene to prepare graphene modified electrodes to detect the four bases of DNA. Electrochemical research has found that graphene modifiers can achieve the four bases of DNA at the same time. The graphene and carbon nanotubes and β-cyclic paste are compounded. The carbon nanotuba effectively reduces the gathering of graphene. For high -sensitivity testing for berin nucleoside, the modified electrode can be promoted and applied to the determination of other biomolecules.2. The functionalization of biomolecular single-chain DNA (SSDNA) and graphene, and the prepared SSDNA-graphene composite materials can Stability. SSDNA-graphene composite material is larger than the surface area and has good biocompatibility. It is an excellent oxidation and restorease fixed material. Fix the SSDNA-graphene composite material to prepare glucose sensors for glucose oxidase. Glucose oxidase is realized directly electrochemical and maintains bio

2023-04-19

The difference between scales graphite and expansion graphite

Scales graphite is a kind of natural graphite. After the mines, it is pure. The general shape is fish -like, so it is called scale graphite. The expansion graphite is that the scales graphite is washed by sourness and after interlocketing, and it can be used as a previous graphite to expand 300 times. You can make rolls and flexible graphite raw materials. Let me introduce you in detail the scales graphite and expandable graphite. the difference:1. The use of scales graphite is more widely used than expandable graphiteIn industrial production, in addition to the function of expanding graphite, scales graphite is much better than expanding graphite. Therefore, the practice of industry is more widely used.2. The production process of scales graphite and expansion graphite is differentScales graphite is mainly made of mechanical damage and grinding. The expansion graphite is mainly made of processing methods such as chemical acidic liquid impregnation, and the production process is more

2023-03-07

Graphite products manufacturers introduce the use of graphite block on cement back kiln in detail

The concrete flip kiln is the insulation machinery and equipment that conducts actual operation under negative pressure. The sealing situation on both sides is immediately associated to the production of cement clinkers, quality and energy consumption. In the work of improving and improving kiln heads and kiln tails, it is one of the effective ways to flip the high -yield and energy -saving of the kiln chemical plant. However, because the working conditions on both sides of the flip kiln are extremely high, not only the temperature is high, but also has flipping and shaking together. Therefore, the sealing work of the flip kiln chemical plant is both the key and difficult. Graphite block has the inevitable heat resistance characteristics and excellent authenticity characteristics, which can achieve a good regulation of flip kiln sealing. Therefore, in China, the graphite block has been used as a sealed material in the early 1950s. At this stage, the current stage. The use of use is st

2023-04-03

The shortcomings and prevention of graphite mold heat treatment process

Introduction to Graphite Electrodes

Graphite electrodes are made of petroleum coke and asphalt coke as aggregates, coal tar pitch as binder, and undergo raw material calcination, crushing and grinding, batching, kneading, forming, roasting, impregnationA high-temperature resistant graphite conductive material made by graphitization and mechanical processing, called artificial graphite electrode (referred to as graphite electrode), to distinguish it from using natural graphiteA natural graphite electrode prepared from raw materials.Graphite electrodes are mainly used as conductive electrode materials for arc steelmaking furnaces.

2023-03-14

Is ultra -fine graphite powder be microflashed?

The size of the material particles determines its name. As you ask questions, micro powder is micron -level powder. In the graphite industry, micro powder generally refers to the diameter of 10 ~ 45 microns. Inside, special graphite powder below 5 microns.Ultra -fine graphite generally refers to graphite with fine particle size. Its particle size is thinner than ordinary microflower graphite. It is generally less than 5um, and the general particle size of microflower graphite is about 10 microns. Qingdao Risheng graphite focuses on ultra -fine graphite production.The specifications of ultra -fine graphite powder are generally between them, mainly used in powder metallurgical destruction agents, graphite, battery negative electrodes, and additives for conductive materials.Graphite powder is divided into: nano graphite powder, colloid graphite powder, scales graphite powder, ultra -fine graphite powder. The number of graphite powder specifications from 50 mesh, and the types of graphite

2023-09-05

How is the steelmaking electric arc furnace equipped with graphite electrodes?

Ordinary power electric furnaces are equipped with ordinary power graphite electrodes, high-power electric furnaces are equipped with high-power graphite electrodes, and ultra-high power electric furnaces are equipped with ultra-high power graphite electrodes.For AC steelmaking arc furnaces,The 10-30t electric furnace is equipped with graphite electrodes with a diameter of 300-400mm,30-50t electric furnace equipped with 450mm diameter graphite electrode,60-80t electric furnace equipped with 500mm diameter graphite electrode,100-170t electric furnace is equipped with graphite electrodes with a diameter of 550-600mm,The 200t electric furnace is equipped with graphite electrodes with a diameter of 600-700mm,250-300t electric furnace is equipped with 700mm diameter graphite electrodes.For DC steelmaking arc furnaces,30t electric furnace equipped with 450mm diameter graphite electrode,A 60t electric furnace is equipped with a 500mm diameter graphite electrode,70-80t electric furnace equipp