2023-11-06

Advantages and disadvantages of high carbon graphite purification methods

The flotation method is one of the conventional mineral purification methods that consumes less energy and reagents, and has a lower cost. This is a major advantage of the flotation method for purifying graphite. However, using flotation to purify graphite can only achieve a limited increase in its grade. For flake graphite, using multi-stage grinding not only cannot completely dissociate its monomer, but also is not conducive to protecting the large scale of graphite. Therefore, using flotation to further improve graphite grade is neither economical nor scientific. To obtain high carbon graphite with a carbon content of over 99%, chemical methods must be used to purify the graphite.（1） Chlorination roasting method. The low roasting temperature and low chlorine consumption of the chlorination roasting method significantly reduce the production cost of graphite. At the same time, the carbon content of graphite products is equivalent to that after treatment with hydrofluoric acid, and t

2023-12-07

Isostatic pressing graphite

Isostatic pressing graphite is a new product developed internationally in the past 50 years, closely linked to today's high-tech industry. It is an irreplaceable material for manufacturing single crystal furnaces, metal continuous casting graphite crystallizers, graphite electrodes for electrical discharge machining, and is also an excellent material for manufacturing rocket nozzles, graphite reactors, deceleration materials, and reflection materials. Its structure is fine and dense, the roasting process requires a particularly slow speed, and the temperature inside the furnace needs to be very uniform. This process takes about 1-2 months. The preparation process of isostatic pressing graphite includes filling the raw material powder into the mold, compacting the powder through high-frequency electromagnetic vibration, sealing and vacuuming, discharging the air between the powder particles, placing it in a high-pressure container containing liquid medium for pressure pressing, and fin

2023-03-07

Many new main uses of graphite have been developed and designed

Many new main uses of graphite have long been developed and designed with the development trend of scientific and technological progress. Graphite has many new main uses. High -purity graphite products are used for high -purity metallurgical industry, electronics industry, Chinese nuclear industry and mold processing; general graphite products can be used as a wall -building raw material for mining with aluminum electrolytic grooves, non -metallurgical tunnel furnaces, and non -ferrous metal furnaces. Calcium residual raw materials can be used as carbon increases for ironmaking industry. There are many types of carbon quality raw materials used to seepage nitrogen, including artificial synthesis of graphite, petroleum coke, casting focus, and pure natural graphite.Graphite products are at least within 2000 degrees. This is because carbon must be graphite at a high temperature natural environment of 2000-3300 degrees at a high temperature and natural environment of at least 10 days and

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 production process and use of expansion graphite

The expansion graphite is a loose and porous worm -like substance prepared by the procedure of graphite scales through the intervening, washing, drying, and high temperature. When the expansion graphite encounters high temperature, it can instantly swell 150 ~ 300 times in volume, which changes from sheet to worm -shaped, thereby loose structure, porous and bending, expanded surface area, improved surface can be enhanced. In this way, it increases its softness, return elasticity and plasticity.The expansion graphite is widely used, and the main development directions are as follows:1. Granules expand graphite: Small particles expand graphite mainly refer to 300 purposes that can expand graphite, and its expansion volume is 100ml/g. This product is mainly used for flame retardant coatings, and its demand is very large.2. Expansion of the swelling temperature at height: The starting expansion temperature is 290-300 ° C, and the expansion volume is ≥230ml/g. This type of expansion graphi

2023-11-10

Graphite high-temperature purification method

Graphite is one of the substances with the highest melting and boiling points in nature, with a melting point of 3850 ± 50 ℃ and a boiling point of 4500 ℃. However, the boiling points of silicate minerals are all below 2750 ℃ (quartz boiling point), and the boiling point of graphite is much higher than the boiling point of the impurity silicate it contains. This characteristic is the theoretical basis for high-temperature purification of graphite. Fill the graphite powder directly into a graphite crucible and heat it in a purification furnace filled with inert gas and Freon protective gas to 2300-3000 ℃ for a period of time. Impurities in the graphite will overflow, thus achieving the purification of the graphite. The high-temperature method generally uses high carbon graphite containing over 99% carbon purified by flotation or chemical methods as the raw material, which can purify the graphite to 99% 99%. By further improving the process conditions and improving the quality of the cr

2023-05-17

Graphite Product Materials advantage

Graphite products (including graphite rods, graphite products, graphite blocks, graphite boards, graphite carbon pipes, graphite rings) are important strategic resources. Graphite is a degeneration of carbon substances, which is most common in Dali, sliced rocks, or hemp rocks. The coal seam can form graphite through the thermal deterioration, while a small amount of graphite is a native mineral of fire rock.The industrial graphite ore is divided into two categories: crystal (scale) graphite ore and steady crystal (earth -shaped) graphite ore. Crystal graphite ore can be divided into two types: scale -like and dense. Chinese graphite ore is the type of scales -like crystal, followed by hidden crystal type, and dense crystal graphite is only seen in individual mining plants such as Tocobra, Xinjiang.Due to its special structure, graphite products are resistant to high temperature resistance, heat shock resistance, conductivity, lubrication, chemical stability, and plasticity. Important

2023-11-16

Classification of Graphene

There are two classification methods for graphene. One is based on the number of layers, which can be divided into four categories: single-layer, double-layer, few layer, and multi-layer products; Another type of product can be divided into three categories according to its form: powder, slurry, and film. Graphene powder and graphene thin film are currently the two main forms of graphene materials. The former is mostly doped in other materials and is widely used in coatings and lithium-ion batteries; Graphene thin films are widely used in the fields of electronics, photons, and optoelectronic devices due to their advantages of transparency, conductivity, and flexibility. Different graphene products have certain differences in raw materials due to different preparation methods. Graphene powder is mainly formed by physical or chemical methods, and the main raw material is natural graphite. Graphene thin films are mainly deposited by chemical vapor deposition, and their raw materials are

2023-05-24

Graphite artificial synthesis

(1) Taking natural scales graphite as raw materials, use Hummers legal oxygen graphite, and use thermal peeling into graphene, or use ultrasonic dispersion to divert into graphene, and then chemically restore into graphene. Use SEM, TEM, HRTEM, XRD, and RAMAN systems to examine the appearance and structure of graphene.(2) Taking graphene as the basis, titanate tetraododes as titanium sources. First, the solution-water thermal legal system is used to prepare titanium dioxide/graphene nano-composite materials. Use XRD, SEM, TEM, and RAMAN to characterize the crystal structure, granular appearance and chemical composition of titanium dioxide/graphene nano -composite materials. The results show that the synthetic titanium dioxide nanocrystal is a sharp titanium structure, the crystalline condition is good, titanium dioxide and graphite The composite effect is better. The photocatalytic performance of nano crystals was studied, and the results showed that titanium dioxide/graphene catalyti

2023-10-19

The Price of Spherical Graphite and Its Use

The price of spherical graphite is related to the use of graphite, which is widely used in many industrial fields.1. The price of spherical graphite is related to the use of graphite for refractory purposes, including bricks, crucible disasters, continuous casting powder, mold cores, molds, and refractory material detergents. Two important changes in the refractory industry are the widespread use of magnesium carbon bricks for steelmaking furnace lining and the application of aluminum carbon bricks in continuous casting. Graphite refractory materials, steel and other industries are closely related, and magnesium's MgO-C in the world has been widely used for steelmaking and has become a traditional use of graphite. Aluminum carbon bricks are mainly used for continuous casting of carbon refractory materials, and for flat protection of slabs such as pipelines and underwater nozzles. Molded refractory crucibles and related products produced from graphite crucibles and related products, su