Microsilica (silica fume) is a byproduct from silicon metal or ferrosilicon industries,is an amorphous silicon dioxide - SiO2 which is generated as a gas in submerged electrical arc furnaces during the reduction of very pure quartz. As the molten metal is produced, a silica-based gas is emitted. This gaseous fume, as it rises, cools rapidly and forms extremely minute,Amorphous, spherical particles. The microsilica is collected in a bag house, a system for filtering the hot air and gases vented from the furnace. This gas vapor is condensed in bag house collectors as very fine powder of spherical particles that average 0.1 to 0.3 microns in diameter with a surface area of 17 to 30 m2/g.
Want more information on 85% Densified Silica Fume? Feel free to contact us.
Physical characteristics:
Color: gray or gray white powder
Refractoriness: >ºC
Bulk density: 320-700 kg/m3
Chemical composition:
Fineness: the fineness of the silica fume is less than 1μm, and the average particle size is 0.1 - 0.3 μm, and the specific surface area is 20 - 28 m2/g. The fineness and specific surface area are about 80-100 times of cement and 50-70 times of fly ash.
Particle morphology and mineral structure: during the formation process of silica fume, the amorphous phase is formed by the action of surface tension due to the effect of surface tension during the formation of phase change, and the surface is smooth. Some are aggregates with multiple spherical particles adhered together. It is a very high surface area and highly active volcanic ash. With silica fume, tiny spheroids can be lubricated.
Applications for Silica Fume:
Application of micro silicon powder in refractories
As a new material, microsilica powder is widely used in the refractory industry. It has an important effect on the improvement of the amorphous refractory. The practical application is in the following aspects:
1. Instead of pure aluminum oxide as refractories.
2. The production of amorphous and shaped refractory products as additives makes the strength and high temperature performance greatly improved.
3, the overall casting ladle coagulant.
4, other cohesive agents, binders, coagulants and additives for other refractory products
Application of microsilica fume in concrete
The micro silica fume powder can be well filled in the cement particle space and make the slurry more dense, mainly in the following:
1, increase strength: make the compressive strength and flexural strength of concrete increase greatly, adding 5-10% micro silica fume, the compressive strength can be increased by 10-30%, and the flexural strength will be increased more than 10%.
2. Increase the density: the impermeability is increased by 5-18 times, and the anti chemical ability is increased by more than 4 times.
3, frost resistance: after 300-500 rapid freeze-thaw cycles, the relative elastic modulus of micro silica powder decreased by 10-20%, while ordinary concrete decreased to 30-73% through 25-50 cycles.
4. early strength: micro silica concrete makes the induction period shortened and has the characteristics of early strength.
5, anti abrasion and anti cavitation resistance: punching resistance of micro silicon fume concrete improve 0.5-2.5 times than ordinary concrete, and anti cavitation ability is improved 3-16 times.
Other application:
ELASTOMERS/POLYMERS - used as a filler in rubber or plastic.
FERTILIZER - used in the defluorination process during the production of dicalcium phosphate (animal feed).
Are you interested in learning more about 90% Undensified Silica Fume? Contact us today to secure an expert consultation!
OIL & GAS WELL - used in down hole grouting operations, improves flow (lightweight) and decreases permeability.
FIBER CEMENT - used to improve strength and permeability of corrugated roofing panels.
SHOTCRETE - is sprayed concrete, silica fume reduces rebound & increases bonding strength, productivity and savings in material cost.
Ordering silica fume cost can be a crucial decision for any construction project. It is important to ask the right questions to ensure that you get the best quality product at the best price. Here are some key questions to consider before making a purchase:
1. What is the price per ton of silica fume?
Before placing an order, it is essential to know the cost per ton of silica fume. This will allow you to compare prices from different suppliers and choose the one that offers the best value for your money.
2. Are there any additional fees or charges?
In addition to the price per ton, make sure to ask about any additional fees or charges that may be associated with your order. This could include delivery fees, handling charges, or taxes that might affect the overall cost of the silica fume.
3. What is the minimum order quantity?
Some suppliers may have a minimum order quantity that you must meet in order to make a purchase. Make sure to ask about this requirement so that you can plan your order accordingly.
4. What is the delivery time?
It is important to know how quickly the supplier can deliver the silica fume to your construction site. This will help you determine if the supplier can meet your project timeline and avoid any delays in your construction schedule.
5. Can the supplier provide references or testimonials?
Before placing an order, it is a good idea to ask the supplier for references or testimonials from previous customers. This will give you an idea of the quality of their products and services and help you make an informed decision.
6. What is the quality of the silica fume?
Make sure to inquire about the quality of the silica fume being offered by the supplier. This includes the particle size, chemical composition, and any other specifications that might be relevant to your project.
7. Is the supplier able to provide technical support or assistance?
If you have any questions or concerns about the silica fume or its application, it is important to know if the supplier can provide technical support or assistance. This will ensure that you have the necessary guidance to use the product effectively.
In conclusion, ordering silica fume cost requires careful consideration and attention to detail. By asking the right questions, you can ensure that you are getting the best quality product at the best price. Remember to contact us for more information or to place an order with a reliable supplier.
Are you interested in learning more about Silica Fume Cost, Fresh Silica Fume Concrete, Silica Fume for Cementitious Applications? Contact us today to secure an expert consultation!
The company is the world’s best 94% Densified Silica Fume supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.