硅藻土
分子式(Formula)： SiO2
分子量(Molecular Weight)： 60.08
CAS No.： 61790-53-2 硅藻土是一种硅质岩石，主要分布在中国、美国、丹麦、法国、苏联、罗马尼亚等国。我国硅藻土储量3.2亿吨，远景储量达20多亿吨，主要集中在华东及东北地区，其中规模较大，资源优为丰富，其他矿床大多数为3~4级土，由于杂质含量高，不能直接深加工利用。
硅藻土由无定形的SiO2组成，并含有少量Fe2O3、CaO、MgO、Al2O3及有机杂质。 硅藻土通常呈浅黄色或浅灰色，质软，多孔而轻，工业上常用来作为保温材料、过滤材料、填料、研磨材料、水玻璃原料、脱色剂及硅藻土助滤剂，催化剂载体等。
显微镜下可观察到天然硅藻土的特殊多孔性构造，这种微孔结构是硅藻土具有特征理化性质的原因。
硅藻土作为载体的主要成分是SiO2。例如工业钒催化剂的活性组分是V2O5，助催化剂为碱金属硫酸盐，载体为精制硅藻土。实验表明，SiO2对活性组分起稳定作用，且随K2O或Na2O含量增加而加强。催化剂的活性还与载体的分散度及孔结构有关。硅藻土用酸处理后，氧化物杂质含量降低， SiO2含量增高，比表面积和孔容也增大，所以精制硅藻土的载体效果比天然硅藻土好。
硅藻土一般是由统称为硅藻的单细胞藻类死亡以后的硅酸盐遗骸形成的，其本质是含水的非晶质SiO2 。硅藻在淡水和咸水中均可生存，种类很多，一般可分为“中心目”硅藻和“羽纹目”硅藻，每一目中，又有许多“属”，相当复杂。
天然硅藻土的主要成分是SiO2，优质者色白，SiO2含量常超过70％。单体硅藻无色透明，硅藻土的颜色取决于粘土矿物及有机质等，不同矿源硅藻上的成分不同。
硅藻土，是被称之为硅藻的单细胞植物死亡后经过1至2万年左右的堆积期，形成的一种化石性的硅藻堆积土矿床。硅藻是最早在地球上出现的原生生物之一，生存在海水或者湖水中。正是这种硅藻，通过光合作用向地球提供氧，促进了人类和动植物的诞生。
这种硅藻土是由单细胞水生植物硅藻的遗骸沉积所形成，这种硅藻的独特性能在于能吸收水中的游离硅形成其骨骸，当其生命结束后沉积，在一定的地质条件下形成硅藻土矿床。它具有一些独特的性能，如：多孔性、较低的浓度、较大的比表面积、相对的不可压缩性及化学稳定性，在通过对原土的粉碎、分选、煅烧、气流分级、去杂等加工工序改变其粒度的分布状态及表面性质后，可适用于涂料油漆添加剂等多种工业要求。
1.Introduction:
Product Name:Diatomite
White/yellowish: nonmetallic mineral
Fossil material:100% natural
Density: 0.47 g/cm3
2.Property:
It has the special features of lacunaris structure, small density, big specific surface area, strong absorbability, good suspension property, stable physical and chemical capabilities, sound & heat insulation, abrasion proof, acid-resistant, non-toxic and odorless, etc.
3.The Quality Grade of Diatomite Minerals:
SiO2 (% , ≥) | 85 | 80 | 75 | 70 | 60 | 50 |
Al2O3(% , ≤) | 6 | 8 | 12 | 14 | 16 | 18 |
Fe2O3(% , ≤) | 1.5 | 3 | 5 | 6 | 7 | 8 |
CaO(% , ≤) | 1 | 1.2 | 1.5 | 2.0 | 3.0 | 4.0 |
MgO(% , ≤) | 0.8 | 1.2 | 1.2 | 1.5 | 2.5 | 3.5 |
Ignition loss (% , ≤) | 5 | 7 | 8 | 10 | ||
moisture (% , ≤) | 10 | |||||
bulk density (g/cm, ≤) | 0.40 | 0.45 | 0.50 | 0.55 | 0.60 | 0.70 |
Weight of screen residue (%,≤) | 10 | 15 | ||||
4.Physical Index:
SiO2 | ≥89% |
Al2O3 | ≤4% |
Fe2O3 | ≤1.5% |
CaO | ≤0.6% |
MgO | ≤0.5% |
Others | ≤0.8% |
Pb, mg/kg | <0.3 |
Water Diffluence | <25mg/l |
Arsenite | <4 ppm |
Heavy Metal | <0.005% |
5.Application:
The diatomite can be used in many important industries.
1.Diatomite is widely used as drainage agent in solid-liquid separation in the such industries as food, beverage, pharmaceutical, petroleum, chemical, dyestuff and water treatment, etc..
2.Diatomite is widely used as carrier in van adic sulfate catalyst, phosphoric acid catalyst, pesticide and fertilizer.
3.Diatomite is widely used as coagulant aid in wastewater treatment. Diatomite is also called industrial monosodium glutamate. It is one of indispensable raw material in modern industry because it can meet the need in many industries.
4.Diatomite is widely used as functional fillings in rubber, plastics, coatings , anti-mosquito incense, paper, abrasive material, polishing paste, toothpaste, cosmetics, asphalt, cement, ceramic product, etc..
5.Diatomite is widely used as thermal insulation material in thermal insulation mortar for inner and outer walls, calcium silicate board, industrial kiln, etc., in the building material industry.
6.Diatomite is widely used as antiagglomerant in food deoxidation fresh-keeping agent; as soil improvement agent in grass of playground and green meadow; as Environmental dessicant in food, pharmaceutical, electric appliances, instrument, garment, etc.; and as oil absorbent (ground absorbent) in environmental protection projects.
6.Absolute advantage:
No toxic chemicals-- Green Chemistry ,Environment
The Wide Various Application:
1 . Activated silica asphalt modifier
2. Filter aid: Food industry ,Wine industry,Chemicals,Industrial oil,Waste-water treatment,Day of supplies,Enzymes are processed purification and filtration to assure high levels of quality.
3. Diatomite Packing &Carrier:
Farm pesticides/chemical manure/coating,paint/plastics/robber/ New Building Materials/paper industry/abrasive/ Cosmetics/ ceramics/remover and so on.
4. Constant temperature desiccant.
7.The Advantage of Asphalt Pavement after Use Activated silica:
Diatomite is a kind of performance is stable industrial mineral, rough surface, with a rigidity of 5.6-6.5, acid-base resistant, wear-resisting, sliding, the unique microporous structure and active ingredients greatly improve the way of the asphalt’s Pavement Performance.
1 Good Compatibility
2 Strong adhesivity
3 High-temperature stability and Low temperature anti-cracking resistance
4 Wide range of application:
1) Apply to new highway reconstruction project at all levels
2)apply to the modify of domestic and import’s asphalt
5 The influence of asphalt ‘s pavement performance:
1) mate: It improves the walking and riding more safe and comfortable.
2)Vibration Absorption ,tyre denoising
8.The Feature of Coating &Paint:
1. big porosity, strong absorbability,stable chemical property,easily dissolved and enhance adhesion .
2. rapid drying on the wall, and deduction of resin consumption to lower the cost.
3. It controls the surface gloss of film uniformly, improves the capacity of wear-resisting,mar resistance,drying,deodorization,clean the air ,sound-proof,water-proof,warm-proof,permeability.
1) Diatomite coating can regulate the temperature of the room. Silicic is the basis of diatom, which has the ultra micro hole are more than charcoal 5000 to 6000 times. Diatomite coating can storing moisture when indoor humidity rise; certainly, it can releasing the storage of moisture when indoor humidity reduce.
2) The function of eliminate odors. Even if there are smokers at home, the wall won’t turn to be yellow. And keep the wall clean.
3) Some medicine and bacterial function, diatom can absorb the toxic chemicals in the room.
9.The Advantage in Pesticides& Compound Fertilizer:
Neutral PH value,non-toxic,good suspension property,strong adsorption, fineness uniform, good uniformity of mixture ,keep soil temperature,fertile soil, loose soil suitable for farming,long validity and bring on the crops,improve soil etc.
Sichuan Honghui Technology Co.,Ltd. owns diatomite mineral which is large-reserve,high tenor and high-purity silicon,besides, our senior expert team and R&D center assure that the high-tech and high-quality products.
10.New rubber--packing
High purity amorphous SiO2 as raw material, which through the professional processing. Our goods have following excellent characters: non-toxic, tasteless, light weight , handling soft ,porous Si ,sound insulation,heat-resisting,acid-resisting,stable chemical property etc. Especially suitable for FKM,silicon rubber,acrylic rubber and so on.
Due to the special grain pattern, diatomite can be reinforcing material in Silicone rubber and machinery rubber, and partly substitute for Carbon soot.
11.The Feature of Diatomite adsorbent& Diatomite Desiccant:
1.It’s made from natural materials. It convenient to recycle due to when in use, no dusts flies.
2. Oil and water adsorption reach to 150-220%.
3.Besides,the oil absorption can be fuel, non-pollution.
12.Package:25kgs or 1000kgs PP woven bag with PE inner liner.
13.Data Sheet:
