| |
Hainan Richin Minerals Co.,Ltd.,authorized with the right to handle the import and export business,is specialized in producing,processing and exporting fused silica, silica sand ,silicon carbide and all kind of glass blocks.
We also deal with the export of the following products:minerals such as olivine sand, kaolin(china clay), brown fused alumina, white fused alumina, cenosphere, barite powder , vermiculite, mica, wollostonite , diatomite, sillimanite, china stone, potassium feldspar, albite, anhydrous sodium sulphate, sepiolite, electrode graphite etc;Chemical products such as calcium chloride,megnesium chloride ,zinc oxide,zinc sulfide,silica gel,disodium phosphate sodium tripoly phosphate etc;metals,tools and cast iron products;nonferrous metals and ferro alloys such as silicon metal,ferro silicon and manganese metal etc.and Building materals such as granlite,marbles and ceramic tiles, glass block and glass beads etc .
Our company is committed to meet and exceed the expectation of our customers.
Our mission is to be a reliable producer and exporter driven by technique ,strict quality control system and exemplary customer service .
Our goal is to excel in the markets we serve through high quality,in time delivery, low cost and excellant service. |
|
 |
 |
|
| |
 |
MINERALS |
 |
| |
|
QUARTZ
There are two types of silica:crystalline and fused silica.According to the usage and customer`s need,using quality quartz stone,with advanced technology and strict quality controll, we can supply various grade and size of fused silica and crystalline cilica.
|
| |
|
| CHEMICAL COMPOSITION |
PHYSICAL PROPERTIES |
|
|
FUSED SILICA
|
FUSED QUARTZ POWER
|
CRYSTAL SILICA
|
|
SiO2
|
≥99.9%
|
≥99.85
|
≥99.7
|
|
Al2O3
|
<0.02%
|
<0.1%
|
<0.05
|
|
Fe2O3
|
<0.004%
|
<0.005%
|
<0.005%
|
|
MgO
|
<0.0005%
|
<0.001%
|
<0.005%
|
|
CaO
|
<0.0005%
|
<0.001%
|
<0.005%
|
|
|
|
FUSED SILICA
|
CRYSTAL SILICA
|
|
Gravity
|
2.21 g/cm3
|
2.65 g/cm3
|
|
Hardness
|
7 New Mohs
|
8 New Mohs
|
|
PH
|
5.0-6.5
|
5.5-7.5
|
|
Thermal expansion
|
0.5×10-6/℃(0-1000℃)
|
0.5×10-6/℃(0-1000℃)
|
|
Thermal conductivity
|
0.003 cal/cm·sec·℃
|
0.03 cal/cm·sec·℃
|
|
Crystal structure
|
Amorphous
|
a-Crystal
|
|
|
| |
|
FUSED SILICA
Quality natural silica stone fused in electricity furnance at 1800 ℃ temperature,with high purity;high chemical and electricity resistance;low thermal expansion and high heat resistance.By crushing,purifying and screening,the fused silica was made to different grade,different size and for different usage,as material for EMC,fly back transfer filler,precision casting and refractories etc.
Size:Available ranging from 40mm to-0.045mm according to customers requirement.Special requirement on size & chemical composition can also be satisfied. |
 |
|
| |
|
QUARTZ CRYSTAL
It is made of quality natural quartz ,with advanced processing line and strict quality control ,The main processing line includes selecting raw material ,crushing ,screeening and purifying ,with high purity ; high chemical and electricity resistance ; and high thermal conductivity .This product is good raw material for EMC(Epoxy Molding Compound) ,fly back transfer filler , paint casting and as refractory materials .
Size : Available ranging from 50mm to -0.045mm according to customer 's requirement , Special requirement on size & chemical composition can also be satisfied. |
 |
|
| |
 |
Nonferrous metals and ferro alloys |
| |
|
SIlicon Metal
1.Si:98.5%min Fe:0.5%max Al:0.5%max Ca:0.3%max
2.Si:99%min Fe:0.4%max Al:0.4%max Ca:0.1%max
3.Si:99%min Fe:0.3max Al:0.3%max Ca:0.1%max
4.Si:99%min Fe:0.3%max Al:0.3%max Ca:0.03%max
Size:10-100mm 90%min Packing:In plastic woven bags of 1MT net each.
Magnesium Ingot
Mg:99%min Size:7.0kg/pc
Packing:In steel bundles of 1MT on strong wooden pallets.
Electrolytic Manganese
1.Mn:99.7%min C:0.04%max S:0.05%max P:0.005%max
2.Mn:99.5% C:0.08%max S:0.1%max P:0.01%max
Packing: in plastic woven bags of 1MT net each. |
|
|
|
