46% Cr2O3 Chromite sand for ladle stuffing sand

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46% Cr2O3 Chromite sand for ladle stuffing sand
Posting date : Jul 09, 2021
Membership
Free Member Scince Jun 06, 2016
FOB Price
410 USD/TON
Min. Order Quantity
1MT
Supply Abillity
20000MT
Port
Lianyungang
Payment Terms
T/T
Package
1MT/BAG
Keyword :
Category
Contact
Pan Chen
Selling Leads Detail
Company Info
 
Quick Detail
Place of Origin
China [CN]
Brand Name
SICHENG
HS-CODE
2610-00
Package & Delivery Lead Time
Package
1MT/BAG
Delivery Lead Time
10 DAYS
Detailed Description

 Chromite sand for foundry without dust

Description:

Foundry chromite ore sand is a special sand for foundry. It is a natural spinel dominated by chromite sand from South Africa. After crushing, grinding and sieving in our factory in China, it is divided into prescribed grain size.It is suitable for making filler sand for steel ladles.

Chromium drainage sand is made of chromite sand and additives. It has the advantages of high specific gravity, good fluidity, high melting point, and no excessive sintering.

 

Features:

1. Heated Volume Stability

2. High thermal conductivity

3. Strong alkali resistance

4. Solid phase sintering, non-sticking sand

 

Application:

Chromite Sand in the steel industry

In steel production, Chromite Sand is used as well filler for protection of the sliding gate in large steel holding ladles.

In the chromium drainage sand, when the added amount of chromite is greater than 60%, the chromite is continuously distributed, and this distribution helps to form a continuous sintered layer. At high temperature, FeO in the chromite reacts to desolvate and form secondary spinel, which causes the volume of the sintered layer to change and cracks. In this way, when the sliding plate is opened, the unsintered drainage sand under the nozzle will flow out quickly, and the cracks in the sintered layer will rapidly expand , The sintered layer is completely destroyed under the action of the static pressure of molten steel, so that the purpose of automatic pouring can be achieved. Chromium drainage sand is used by most large steel mills, accounting for about 30% of the entire drainage sand for ladle, especially for refined ladle.

 

 CHEMICAL COMPOSITION

Cr2O3

≥46.0%

SiO2

≤1.0%

FeO

≤26.5%

CaO

≤0.3%

MgO

≤10%

AL2O3

≤15.5%

P

≤0.003%

S

≤0.003%

Cr/Fe

1.55:1

TYPICAL PHYSICAL PROPERTIES

Hardness:

Mohs:5.5-6

Melting Point:

Sublimes at 2180 ℃

Sintering point:

>1800℃

Specific Gravity:

4.0-4.8 g/cm3

Bulk density(LPD):

2.5-3 g/cm3

Color:

Black

PH

7-9

Percentage of free acid present in the sand

0%

The amount of the acid

≤2ML

Percentage of soil

≤0.1

Percentage of Moisture

≤0.1

AVAILABLE SIZES

AFS25-35,AFS25-30,AFS30-35,AFS35-40,AFS40-45,AFS45-50,AFS40-50,AFS50-55,AFS55-60,AFS60-65

 

 



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