Cr2O3 chromite fume Glass container pigment green
Product introduction of Cr2O3 chromite fume Glass container pigment green
Chromite flour 325 mesh is a natural chromite material, which is selected from natural chromite ore through screening. Compared with high-purity green chromium oxide powder, natural chromite powder has a cost advantage.
Chromite flour has the following properties in terms of performance:
》》The refractory temperature is high, with a melting point of 2180 ° C for 325 mesh chromite flour and a refractory temperature of 1800 ° C. Therefore, it can be used as a high-temperature refractory coating for casting and refractory castables.
》》The chemical composition contains over 46% Cr2O3. The grade of natural chromite is generally divided into purity levels such as 38%, 43%, 46%, and 48%. After grinding into powder, impurities in chromite are released, and the Cr2O3 purity of chromite powder is reduced by 325 mesh. As a professional chromite flour manufacturer, our company uses 48% chrome ore as the raw material to produce chromite flour 325 mesh. It ensures the Cr2O3 content of 325 mesh (45 microns) is higher than 46% to meet the needs of glass colorants.
》》The color of chromite flour 325 mesh. Chromium element is a commonly used raw material for green pigments and colorants in industry. Chromite flour contains 46% chromium oxide. Although it appears black brown or black green, it can produce an Emerald Green or Georgia Green when added to soda-lime glass and fired in a kiln. Therefore, chromite flour can be used as a pigment for dark brown or green glass containers.
》》The pH value is neutral and will not affect the acidity or alkalinity of coatings or other products.
》》The thermal expansion coefficient is low, and the thermal expansion coefficient of chromite flour at high temperatures is 0.6×10-6/℃. As an addition to casting coatings, it is beneficial for casting precision.
》》High thermal conductivity, with a thermal conductivity of 0.63W/(M · K) for 325 mesh chromite flour. Therefore, refractory and casting materials made from chromite flour can transfer heat quickly.
》》The particle size of chromite flour is smaller than 325 mesh(45 microns). And the screening of chromite flour is carried out using a 325-mesh sieve. The residue rate below 45 microns is over 95%, with high particle size uniformity.
》》The particle shape of chromium ore powder is quasi-spherical, and even after grinding. Thus there will be no needle-like or Columnar particles.
》》Chromium is a heavy metal substance that is harmful to human health. When using it, operators should pay attention to the protection.
Chemical Composition of Chromite flour 325mesh from China
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 of Chromite flour 325mesh from China
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 |
Particle size distribution of Chromite flour 325mesh from China
D10 Value(um) | D50 Value(um) | D90 Value(um) | D(3,2) (um) | D(4,3) (um) |
7.5 | 22.2 | 44.5 | 15.5 | 24.4 |
Applications of Chromite flour 325mesh from China
Glass colorant of green & dark brown glass.
Pigment.
Refrectory coating for casting.
Other chemical additives.
Production details of Chromite flour 325mesh from China
Package of Chromite flour 325mesh from China
FAQ:
Q: Where are you located?
A: Our factory is located in a tariff-free Zone at Lianyungang port. So it will be convience to export.
Q: How do you control the chromite powder particle size?
A: We control the particle size by set milling time period and make proper sieve passing rate.
Q: What is the quality control process of chromite powder?
A: Step 1,check chemical content with the chromite raw blocks. Step 2,Monitor the cleaness and Magnetic content during the production process. Step 3, Check the particle size during sieve process. Step 4, Inspect all index in our lab before delivery.
Q: Can you provide free samples?
A: Yes, free samples within 25 kgs are available. You only have to bear the express cost.
Q: What is the delivery time for one container?
A: Generally the lead time of FCL is 7-10 days. A bigger quantity will get a longer delivery time.
Q: What is the HS code of Chromite powder?
A: The chromite powder HS code is 2610000000.
Q: Do you get MSDS of chromite powder?
A: Yes. You could download it from our website or get it from our sales team.