Filling materials for steel production Chromite sand/Chromium ore/Chromium foundry sand
- $515.00 /piece
- 1 piece
- Chifeng Fuyue Activated Carbon Factory
- Inner Mongolia, China
- Ms Ava Han
Product Detail
| Place of origin: | Inner Mongolia, China | Moisture (%): | 0.2% |
| Refractory: | 1800 minutes | model: | 46% |
| product name: | Chrome foundry sand | iron: | Maximum 27% |
| Packaging details: | 25kg/bag, 50kg/bag, 1 ton | application: | foundry |
| Supply capacity: | 3000 tons per month | Calcium Oxide: | 0.4% or less |
| port: | Tianjin, Qingdao, Shanghai | sample: | free |
| Cr2O3 (minimum value): | 46% | size: | 40-70/70-140/200 mesh |
| chemical composition: | Chromium trioxide | type: | fine |
| To concentrate or not to concentrate: | Not concentrated | payment terms: | L/C, Western Union, T/T, MoneyGram |
| brand: | CFFY | Silica 2: | Maximum 1.3% |
Filling materials for steel production Chromite sand/Chromium ore/Chromium foundry sand
Chromite Ore 46% Cr2O3 Chromite Sand
Chromite sand is special sand for foundry. It is a natural spinel mainly composed of chromite. After crushing, grinding and screening, it is divided into specified particle sizes, suitable for sand for modeling (core making). Chromium ore can be divided into two grades according to its chemical composition, first-grade Cr2O3 (>45%) and second-grade Cr2O3 (>35%).
Commonly used sizes: 40-70/70-140/200 mesh
feature:
1. Heating volume stability
2. High thermal conductivity
3. Strong alkali resistance
4. Solid phase sintering, no sand sticking
Advantages of Chromite Ore
Compared with silica sand, chromite sand can avoid sand sticking to most castings, so it can also save the cost of surface treatment. Furthermore, chromite can be recycled multiple times through different technologies.
application:
1. Chromite sand in foundry industry
Its properties allow the material to be used as cores and molding sand in high-strength gray iron and steel foundries.
Its high thermal conductivity gives it good cooling properties, and its low thermal expansion gives it good dimensional stability.
Its alkalinity is close to neutral, it can be used with a variety of resin bonding systems and inorganic binders, and it has high refractoriness and wide screening distribution.
2. Chromite sand 20-70# in the steel industry
In steel production, chromite sand is also used as filler to protect sliding nozzles in large ladles.
Chromium drainage sand is made from chromite sand and additives. It has the advantages of high specific gravity, good fluidity, high melting point, and no excessive sintering. In chromium diversion sand, when the addition amount of chromite is greater than 60%, the chromite is continuously distributed, and this distribution helps to form a continuous sintered layer. At high temperatures, FeO in chromite reacts to remove the solvent and form secondary spinel, which causes the volume of the sintered layer to change and cause cracks. In this way, when the slide plate is opened, the unsintered drainage sand under the nozzle will flow out quickly, and the cracks in the sintered layer will expand rapidly. Under the action of the static pressure of the molten steel, the sintered layer will be completely destroyed. , thereby achieving the purpose of automatic pouring. Most large steel plants use chromium drainage sand, which accounts for about 30% of the entire ladle drainage sand, especially refining ladle drainage sand.
3. Chromite sand in glass industry
When ground into a fine powder, chromite sand is used as a colorant in the production of green glass beverage containers.
Chromite sand specifications:
| chemical composition | |
| Chromium trioxide | ≥46.0% |
| Silica | ≤1.0% |
| ferrous oxide | ≤26.5% |
| Calcium Oxide | ≤0.3% |
| magnesium oxide | ≤10% |
| Aluminum oxide | ≤15.5% |
| phosphorus | ≤0.003% |
| S | ≤0.003% |
| Chromium/Iron | 1.55:1 |
| Typical physical properties | |
| hardness: | Mohs: 5.5-6 |
| Melting point: | 2180℃ sublimation |
| Sintering point: | >1800℃ |
| sintered | 1600℃ |
| proportion: | 4.0-4.8g/cubic centimeter |
| Bulk Density (LPD): | 2.5-3g/cubic centimeter |
| color: | Black |
| pH value | 7-9 |
| Percent free acid in sand | 0% |
| Amount of acid | ≤2ML |
| soil percentage | ≤0.1 |
| Moisture percentage | ≤0.1 |
Iron sand specifications%:
|
iron |
60-98% |
|
C |
0.5% |
|
silicon |
2.2 |
|
manganese |
2.2 |
|
hardness |
5.1-5.2 |
|
Weight BalanceHigh DensityPack Density |
4.2-7.2/2.5-4.8 |
|
6.2-6.5T/m3/4.1-4.3T/m3 |
|
|
6.8-7.2T/m3/4.8-5.2T/m3 |
Magnetite sand specifications:
|
Bulk density |
4.58 g/cm3 |
|
volume and weight |
2.6 g/cm3 |
|
hardness |
5.5-5.6 |
|
iron |
23.85% |
|
ferric iron |
40-42% |
|
Iron oxide |
4.45% |
|
Aluminum oxide |
0.165% |
|
S |
0.26% |
Packaging and shipping:
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