Factory Direct Sales of High Hardness Top Quality Abrasive Black Fused Alumina/Black Aluminum Micropowder Industrial Grinding Sand

Product Description

 

Product Description

JUNDA Black Corundum (Al2O3) is a crystal shape of aluminum oxide, or is also known as iron bauxite cuz it contains traces of iron as well. It is melted at high temperature in the arc furnace, which is further smelted and then cooled in order to get the metal (α-Al2O3) from its ore. Which is environmentally friendly, alternative wear resistant material. On the flip side, it contains the impurities of silicon oxide and titanium oxide.
 According to the various levels of alumina content, black alumina abrasives can be divided into two types. The higher the aluminum content, the higher the hardness of black alumina and the stronger its grinding performance

Grinding and polishing of stainless steel, optical glass, bamboo or other materials.
For polishing various spare parts: bicycles, sewing-machine, hard metal tools,medical apparatus, timepieces, glass products and stone grinding.
For making abrasive tools: fiber-reinforced cutting wheels, grinding wheels, sand cloth,paper and paste

 

Product Parameters

Grade	Leading indicator
	AI2O3	Fe2O3	SiO2	TiO2
A	≥62	6-12	≤25	2-4
B	≥80	4-8	≤10	2-4

Density	maximum service temperature	Hardness(mohs)	Melting point	Application	Size	Crystal shape
3.5g/cm3	1850ºC	9	2050ºC	Polishing, grinding, sanding, sandblasting	12--320mesh	Trigonal crystal system

Product Feature

Key differences between various types.

1)Aluminum content is one of the vital differences between white, brown and black corundums. White corundum contains more than 99% aluminum. Black corundum contains 45-75% aluminum. Brown corundum contains 75-94% aluminum.
2) Hardness. White corundum has the highest hardness. Brown corundum has average hardness. The hardness of black corundum considered to be minimal among these three types of corundum.
3) Different colors. Black corundum has metallic black color. Brown corundum is brownish red. White corundum is transparent and has white color.
4) Different Uses. White one is used for the manufacturing of advanced refractory materials and precision polishing and grinding. Brown corundum is used for sandblasting and rust removal. Black corundum is cost effective and mainly used for rough polishing and non-slippery and wear resistant floor aggregates.

Product Applications

Black Fused Alumina selects and uses bauxite, iron oxide raw materials and adds to other microelement aborative smelt by tilting arc furnace, ensuring all the piece shape black corundum were high grade product. Few impurity, high grade and stable quality, which prepares the ground for producing grain-size sands and micro-powder with moderate rigidity, fine tenacity and excellent service performance.

It's suitable for polishing various spare parts such as: Bicycles, sewing-machine, hard metal tools, medical apparatus, timepieces, glass products and stone grinding. It's also the right material for making abrasive tools: Fiber-reinforced cutting wheels, grinding wheels, sand cloth, paper and paste.

Company Profile

 

Exhibition

Buyer's praise

Packaging & Shipping

FAQ

1. Are you a factory or trading company?
Jinan Junda Industrial Technology Co.,Ltd, established in 2005, is specialized in the development,manufacture, marketing and service-supplying of abrasives and sand blasting equipment, spare parts & protective tools. With its headquarter in Jinan city, Shandong province, Junda is becoming the leading enterprise in the field of metal surface finishing. 

2. Can you provide ODM or OEM service?
We have complete lines for design and produce,we do many OEM and ODM service for our customers. 

3. Can you provide samples?
We can provide paid samples. 

4. What is the lead time for regular orders?
It depends on the order quantity and the season you place the order. The lead time is about 5-15 days. 

5. what services can we provide?
Accepted Delivery Terms: FOB,CIF,FCA; Accepted Payment Currency:USD,EUR,JPY; Accepted Payment Type: T/T,L/C,Cash; Language Spoken:English,Chinese

More details, please contact 

Our team has high quality, prompt and patient service, patiently answer your questions about the product, and provide you with the most suitable purchase plan for you.
If any need, please contact us any time!