Brown corundum is not unfamiliar to everyone. It is the main raw material for producing high-temperature refractory materials, grinding tools, abrasives, and sandblasting. The brown corundum we usually use is obtained through electric melting method, and there are two main production processes for brown corundum: fixed furnace brown corundum and pouring furnace brown corundum.

I estimate that after the smelting of brown corundum, many brown corundum factories have not conducted detailed laboratory analysis and comparison, as well as data statistics and summary. That is to say, the chemical composition indicators, structural characteristics, and features of the fixed furnace brown corundum melt and the pouring furnace brown corundum melt have not been analyzed and summarized. Henan Ruishi Group, as a well-known enterprise in the field of abrasives and grinding tools in China, will share with you today the performance, physical and chemical indicators, and data report analysis of various parts of the brown corundum blocks in the pouring furnace and fixed furnace for your reference. The details are as follows:

1、 Chemical composition of various parts of the fixed furnace brown corundum melt block

Melting point

Sample No

Chemical composition (%)

Al2O3

SiO2

Fe2O3

TiO2

CaO

MgO

bell

１

ninety-four point seven seven

one point four five

zero point zero nine

two point five eight

zero point five four

zero point three seven

２

ninety-five point nine seven

zero point eight six

zero point one eight

two point four five

zero point four three

zero point three one

shrinkage cavity

１

ninety-six point four two

zero point nine nine

zero point one two

one point nine three

zero point three five

zero point two four

２

ninety-six point six eight

zero point five zero

zero point nine

one point eight six

zero point four seven

zero point three one

central section

１

ninety-five point nine two

one

zero point one four

two point two five

zero point four three

zero point two one

２

ninety-six point seven six

zero point five five

zero point one two

one point nine six

zero point three four

zero point two four

Edge

１

ninety-five point eight two

one point zero six

zero point four two

one point eight eight

zero point four seven

zero point two eight

２

ninety-five point nine four

zero point eight one

zero point two three

two point three five

zero point five two

zero point two eight

bottom

１

ninety-six point two five

one point zero six

zero point one five

one point nine five

zero point three eight

zero point two eight

２

ninety-six point zero eight

zero point eight two

zero point six one

one point nine eight

zero point three nine

zero point two three

2、 Chemical composition of various parts of the brown corundum melt in the pouring furnace

Melting point

Sample No

Chemical composition (%)

Al2O3

SiO2

TiO2

Fe2O3

CaO

MgO

gai

one

ninety-five point one three

one point zero three

two point eight four

zero point three one

two

ninety-five point seven two

zero point eight nine

two point five eight

zero point one eight

zero point four nine

zero point two three

three

ninety-four point one four

one point zero five

three point seven two

zero point three three

zero point four two

zero point two zero

Cover the bottom

one

ninety-five point seven three

zero point six three

two point nine four

zero point one six

two

ninety-five point seven two

zero point seven two

two point nine nine

zero point zero eight

zero point six three

zero point one zero

three

ninety-five point one nine

zero point six six

three point four zero

zero point two one

zero point four two

zero point two zero

central section

(Furnace core)

one

ninety-five point six seven

zero point eight nine

two point six eight

zero point one three

two

ninety-six point four

zero point four seven

two point five two

zero point one three

zero point five one

zero point two one

three

ninety-five point three nine

zero point five six

three point three eight

zero point one five

zero point five zero

zero point two zero

Edge

one

ninety-six point seven four

zero point five six

two point zero eight

zero point one one

two

ninety-six point five seven

zero point four seven

two point three three

zero point one five

zero point five six

zero point three four

three

ninety-five point four five

zero point five two

three point four zero

zero point one three

zero point three five

zero point two zero

bottom

one

ninety-six point four five

zero point six six

two point one four

zero point two zero

two

ninety-six point six eight

zero point four two

two point one eight

zero point one seven

zero point four zero

zero point two zero

three

ninety-four point eight eight

zero point seven two

three point six zero

zero point two two

zero point three two

zero point one five

3、 Structural characteristics of various parts of the fixed furnace brown corundum melt block

part

Characteristics of melt block structure

colour

bell

Plate like structure, dense organization

Light gray to dark gray, with some surfaces appearing reddish brown

shrinkage cavity

Multi porous equiaxed granular structure, mostly needle shaped crystals under the cover

Rose color, blue gray, with a few shades of purple brown

central section

Dense equiaxed granular and a small amount of plate-like structure

Purple brown to rose color

Edge

Dense and coarse crystals with a plate-like structure

Dark brown to bluish brown

bottom

Dense crystallization, sometimes in the form of flakes or granules, with irregular silicon iron alloy particles carried in

Dark brown to light rose

Ferrosilicon alloy

compact

The cross-section has a silver white metallic luster

4、 Structural characteristics of various parts of the brown corundum melt block in the pouring furnace

part

Structural characteristics and color of the melt block

gai

Flake and densely structured. Surface soil yellow, thickness 10-15mm

Cover the bottom

Flake, dense in structure, with fine crystals and a very thin layer of pale yellow epidermis. The cross-section is brown or grayish brown. Thickness 20-150mm

central section

Honeycomb shaped, granular structure, coarse crystals, brown or purple red in color

Edge

Medium crystalline dense block with resin luster, brown or brownish color, with yellow crystals about 5mm thick at the contact with the package wall

bottom

Overall dense block, medium to coarse crystals, brown or brownish, resin luster