It is observed that only the best high-temperature resistant materials are used as refractory materials. The refractory materials are made from a mixture of silicon, 铝, 和钙. Their low thermal conductivity properties help prevent heat from being transferred away from the furnace. This is important because it results in less energy being needed to maintain a desired temperature for the furnace.
Basis their chemical composition, refractory materials expand when they are exposed to heat. Magnesium oxide is by far the most commonly used material and it has a high coefficient of expansion. A typical manufacturing process for refractory materials involves steps like crushing and grinding, followed by forming, firing, and final processing.
The Best Refractory Material Uses for Silica Fume
Silica fume is a by-product of the manufacturing process of silicon. Elemental silicon is produced by heating quartz at extremely high temperatures, the SiO2 (二氧化硅) thus produced further oxidizes and condenses to give out silica fume. This article will discuss how refractory material can be made from silica fume.
Refractory materials are used to make metal-casting molds and foundry equipment for metal production. They are also used in high-temperature furnaces for making steel or other metals by melting the castings.
Manufacturers use this material mainly to produce ceramic products. Many types of refractory materials can be created using silica fume, including castable refractories, nonwoven fiber materials, and fluxes that can withstand high temperatures without breaking down over time.
Silica sand is widely used in the production of refractory castables thanks to its ability to provide better packing. 在保持相同的流动特性的同时，它比沙子需要更少的水, 使其非常适合低温烧结. Silica sand is also great for facilitating the formation of mullite, 这有助于使您的浇注料更加耐用.
浇注料坚固且可阻止气体, 矿渣, 和金属穿过它. 硅粉浇注料最强, 尤其是在高温下 & 高密度. 您在食谱中使用硅粉的次数越多, 对您的选角项目越好.
什么是微硅粉?
微硅粉 is essentially the by-product obtained from ferrosilicon alloys and silicon metal production processes. Silica fume is popular for its use in concrete. It’s not just ground-up glass – it has other minerals mixed into it as well.
Silica Fume is light and porous, so it’s easy to process with other materials. Silica fume can be used for insulation or as a filler in rubber products because it helps the material resist heat and moisture.
这种多功能性和提供更均匀产品的能力使微硅粉成为制造高质量耐火浇注料的理想添加剂. 这是由于硅粉对 pH 值具有稳定作用, 减少杂质, 并提高最终产品的可加工性.
为什么使用微硅粉代替其他耐火材料?
工业环境中使用耐火材料并不罕见. 然而, 并非所有耐火材料都是一样的. 最常用的材料是硅砂, 砖, 水泥, 和粘土. 然而, these materials can take up excessive space and produce harmful gases.
Silica fume is a type of industrial mineral that can be found in abundance – it is an offshoot of the production process for silicon metal. Because it takes up less space than other materials and its production process does not release harmful gases into the environment, silica fume has been becoming more popular as a choice for industrial minerals over time.
Modus Operandi for bonding
Silica fume reacts with water to form silanol groups (Si-OH) on the surface. These groups condense at 80°C to form siloxane bonds (Si−O−Si). This siloxane network that is formed under low temperature at room temperature starts to break down at 250°F.
此外, silica fume provides high strength under different temperatures. Silica fume helps increase the strength of castable products at low and high temperatures.
Silica fume is so special because it can actually react with Al2O3 at high temperatures to form mullite, thanks to its high activity. This improves the strength and stability of your ordinary refractory castables. Thanks to the combination of its design and materials, the product can have ab cold crushing strength that is more than 100 MPa after being fired at around 1000°C.
Silica Fume Uses in Refractory Materials
Silica Fume is a by-product of the production of Portland cement and has been used in refractory materials for centuries.
Silica fume has a number of applications:
– 耐火材料: 正确比例的硅粉可使蜂箱内衬承受高达 2100°C 的温度而不变形或熔化. 这使其成为某些烤箱和熔炉最常见的衬里形式.
– 硅粉是一种直接影响其流动性的物质. 该物质的二氧化硅含量越高, 它流动得越好. 使用低 SiO2 含量硅粉可能会导致浇注料中含水量较高.
– Structural Insulators: Silica fume particles can help with heat insulation, as it is thermally stable and doesn’t melt until 2100°C.
– 陶瓷: Silica fume also helps improve the properties of ceramic materials.
– Silica fume is a very reactive material because of its high surface free energy. 为此原因, silica fume usually collides with other particles and agglomerates easily. In order to improve its reactivity, some types of undensified silica fume are often used as binders as they have a greater dispersion efficiency. Silica fume is an effective secondary reactant in the production of lower-strength, high-density pouring cement.
Effect of the presence of silica fume on castable containing magnesium oxide
The use of silica fume in magnesium oxide castables has been studied extensively. The potential benefits are reduced porosity, 渗透性降低, reduced gas leakage, reduced shrinkage, better strength at elevated temperatures, and improved thermal properties. This experiment aims to determine how the presence of silica fume affects the properties of castable containing magnesium oxide. A castable is a type of concrete that cures to produce no surface tension.
Silica Fume and Its Effect on Refractory Materials
Silica fume is a by-product of silicon dioxide, 也称为微硅. In the manufacturing process, sand is heated to 2,200 degrees Celsius in a furnace to produce silicon and silica fume.
This silica has been used in refractory materials because it has a high melting point and low thermal conductivity properties. Refractory materials are used in processes such as steelmaking and glass production for their resistance to heat and oxidation.
Silica fume is often used for this reason in the production of bricks and mortar for construction purposes.
The Pros and Cons of Silica Fume in Refractory Materials
Silica fume has been used as an additive in refractory materials for over a decade. It is still widely used today, but there are some arguments for the use of silica fume. Silica fume is cheaper than other alternatives, it reduces sulfur dioxide emissions and produces less smoke. 然而, there are cons to using silica fume too. Silica fume can cause pollution when it is created at high temperatures, but this can be mitigated with the use of binders to create a more solid form of the material.
结论: Why Silica Fume is a Good Choice for Refractory Materials
Silica Fume is one of the most popular refractory materials for brick making. It is an important source of silicon dioxide, which forms strong bonds with calcium oxide and aluminum oxide in clay bricks. This makes it a perfect material for use in refractory materials. 此外, it has excellent insulating properties that make it heat resistant and resistant to corrosion. Another key feature is its low density, which means it takes up less space than other refractory materials like finely ground coal or lime mortar. In addition to these benefits, 由于二氧化硅能够将热能快速从一处传导至另一处，硅粉还具有良好的热容量和导热性.
总而言之, 微硅粉具有众多优点，使其成为耐火材料的完美选择:
• 该材料耐热, 火, 和震惊.
• 具有高热容和低导热率, 这种材料是需要耐高温应用的最佳选择.
• The refractory material offers outstanding thermal stability. It does not crumble under thermal shock.
It is important to choose a trusted silica fume supplier, 如河南高级磨具进口 & 出口贸易公司, 有限公司. 立即购买我们的高品质硅粉产品.
