High Quality Graphite Rotor for Aluminum

What is graphite rotor?

The graphite rotor and graphite impeller are made of high-purity graphite. The surface is treated with special anti-oxidation, and the service life is about 3 times that of ordinary products. It is widely used in aluminum alloy casting industry.

The purification process of liquid aluminum alloy is the main method to improve the comprehensive performance of aluminum alloy. In the purification process, the method of mixing the purification gas and the solvent and spraying the graphite rotor to the aluminum melt for purification is the most advanced treatment method in the world. The working principle of the graphite rotor is: the rotating rotor breaks the nitrogen (or argon) blown into the aluminum melt into a large number of dispersed bubbles and disperses them in the molten metal. Bubbles in the melt rely on the gas partial pressure difference and the principle of surface adsorption to absorb hydrogen in the melt, adsorb oxidized slag, and be taken out of the melt surface as the bubbles rise, so that the melt can be purified. Because the bubbles are small and dispersed, they are evenly mixed with the rotating melt, and then they rotate in a spiral shape to float slowly. The contact time with the melt is long, and the air flow generated by continuous linear rise will not be formed, thereby removing the harmful hydrogen in the aluminum melt. Improved purification effect.

Applications of graphite rotor:

1. Reduce the processing cost
2. Reduce the consumption of inert gas
3. Reduce the aluminum content in the slag
4. Reduce labor costs 5. Improve performance, longer replacement cycle
6. Improve reliability and reduce maintenance costs.

Why and how to propose a suitable anti-erosion resistance oxidation treatment program of graphite rotors?

Because the specifications of graphite rotors used in each casting or casting-rolling production line are not the same. First, the customer provides the original design drawings and fills in the complete graphite rotor field use environmental survey form. Then, according to the drawings, combined with the graphite rotor speed, direction of rotation and its relative position to the aluminum liquid level, the technical analysis is carried out, and a suitable anti-erosion resistance oxidation treatment program is proposed.

The graphite rotor rotating nozzle is made of high-purity graphite. In addition to considering the need to break up the bubbles, the nozzle structure also uses the centrifugal force generated by stirring the aluminum alloy melt to make the melt enter the nozzle and evenly mix with the horizontally ejected gas to form a gas /The liquid jet is sprayed to increase the contact area and contact time of the bubble and the aluminum alloy liquid, and improve the degassing purification effect.
The speed of the graphite rotor can be steplessly adjusted by the frequency converter speed control, up to 700r/min. The specification of graphite rotor is Φ70mm~250mm, and the specification of impeller is Φ85mm~350mm. The high-purity anti-oxidation graphite rotor has the characteristics of high strength, high temperature resistance, and aluminum flow corrosion resistance. In the process of purifying and degassing, the surface of the aluminum alloy liquid in the box is covered with nitrogen for protection, so that the part of the graphite rotor exposed from the aluminum alloy liquid is in an inert gas to prevent high temperature oxidation of the rotor and prolong the service life of the rotor.
The shape of the impeller is streamlined, which can reduce the resistance during rotation, and the friction and scouring force between the impeller and the aluminum alloy liquid is relatively small. So that the degassing rate is above 50%, shortening the smelting time and reducing the production cost.

Company Profile

Established in 2017, located in Fengxin Industrial Area, Yichun City, Jiangxi Province, China, Jiangxi Ningheda New Material Co., Ltd. is the subsidiary company of Jiangxi Ningxin New Material Co., Ltd.

Jiangxi Ningxin New Material Co., Ltd. is an enterprise which specializes in R&D, production and sale of special graphite. The total investment is RMB 180 million. It covers an area of more than 70000 square meters and produces 10000 tons of special graphite annually, which makes Ningxin to be the leading enterprise in the domestic industry.

On November 8th, 2016, Ningxin was listed of Chinese new third board. The stock abbreviation is Ningxin New Material, and stock code is 839719.
Jiangxi Ningheda New Material Co., Ltd. is mainly engaged in graphite product processing, graphite product matching service, providing graphite materials, graphite electrode and graphite products for the lithium industry, rare earth industry, machinery industry, aerospace, semiconductor and solar photovoltaic industry, together with the corresponding products technical service and technical application of update program.


With excellent production technology, good customer service, high market share, and relying on the advantage of new material, capital and management of parent company (Jiangxi Ningxin New Material Co., Ltd.), Jiangxi Ningheda New Material Co., Ltd. develops quickly. We devote to the extension of the special graphite industry chain, and make contributions for building the future whole graphite industry strategy.

Ningheda Graphite Technical Characteristic:

Grade	NX601	NX602	NX603	NX604	NX605
Grain Size (≤μm)	25	25	25	25	25
Bulk Density (≥g/cm3)	1.55	1.72	1.80	1.85	1.90
Compressive Strength (≥MPa)	35	45	60	65	70
Flexural Strength (≥MPa)	15	20	30	33	35
Porosity (≤%)	23	20	17	14	11
Specific Resistance (≤μΩm)	12	12	12	12	12
Ash Content (≤%)	0.08	0.07	0.06	0.05	0.03
Shore Hardness	35	45	50	55	60

Advantages of Ningheda graphite raw material

1. The processing materials are ultrafine granule structure, high purity and graphite with high graphitization degree.
2. High hardness, good anti-oxidation performance and high machining accuracy
3. Good conductivity, high resistivity, sufficient mechanical strength
4. Small porosity and dense structure.
5. Excellent thermal shock resistance, conductive and thermal conductivity.
6. High temperature resistance, corrosion resistance, acid and alkali resistance, good wear resistance.
7. Surface can be treated with anti-oxidation.

Why choose graphite of Jiangxi Ningheda New Material Co., Ltd.?

1. Stable quality, reasonable price, efficient communication, timely delivery.
2. Many experts with more than 20 years of experience in graphite industry, we not only provide graphite products, but also provide application solutions for the corresponding industry.
3. The companys strength and scale are in a leading position in China, with emphasis on reputation and worry-free after-sales.
4. The products sell well in many countries worldwide, with rich experience in import and export, and complete various certificates to ensure that the goods reach the customer smoothly.
5. With professional designers, OEM and ODM are available.
6. Fast and convenient delivery method, which can guarantee the timeliness.

High Quality Graphite Rotor for Aluminum

For more details, pls contact Alisa!