Products Parameters
|
Item |
Unit |
Ca30Si60 |
Ca28Si55 |
|
|
Si |
(min)(%) |
60 |
55 |
|
|
Ca |
(min)(%) |
30 |
28 |
|
|
C |
(max)(%) |
1.0 |
1.0 |
|
|
S |
(max)(%) |
0.05 |
0.05 |
|
|
Al |
(max)(%) |
2.4 |
2.4 |
|
|
P |
(max)(%) |
0.04 |
0.04 |
|
|
Size |
10-30mm 90%min,10-50mm90%mm,10-100mm or required |
|||
Products Description
In the complex process of steel and nonferrous metal smelting, silicon-calcium alloy is a seemingly ordinary but indispensable auxiliary material. It is composed of two elements, silicon and calcium, and usually exists in the form of blocks or powder. Although it is not as eye-catching as molten iron or aluminum ingots, it plays a key role behind the scenes of metallurgical reactions.
The core value of silicon-calcium alloy lies in its excellent deoxidation and desulfurization capabilities. During the steelmaking process, the residual oxygen and sulfur in the molten steel will significantly reduce the toughness and strength of the steel, while the calcium element in the silicon-calcium alloy can form stable compounds with oxygen and sulfur to form slag that can be removed. Compared with simple ferrosilicon or aluminum deoxidation, the deoxidation products of silicon-calcium alloy are easier to float, reducing the residual inclusions in the steel, thereby improving the purity of the steel. This "purification" effect is particularly suitable for the production of high-grade special steels, such as bearing steel or pipeline steel. In addition, in cast iron production, silicon-calcium alloy can effectively promote graphite spheroidization and improve the mechanical properties of cast iron. Its unique "blending" ability makes the microstructure of metal materials more uniform and reduces casting defects.
The addition method of silicon-calcium alloy is very flexible. In converter or electric furnace smelting, it can be directly added with raw materials; in the refining stage, silicon-calcium powder can be injected into molten steel by injection. This adaptability makes it a common additive in continuous casting and die casting processes. It is worth mentioning that silicon-calcium alloy is also useful in non-ferrous metal smelting. For example, adding silicon-calcium alloy during magnesium alloy smelting can refine grains and improve creep resistance.
As the metallurgical industry's requirements for material performance increase, the formula and use technology of silicon calcium alloy are also continuously optimized. Low aluminum and low titanium high-purity silicon calcium alloy has gradually become the choice of the high-end market to meet the stringent standards of nuclear power steel or aerospace materials. At the same time, the trend of environmentally friendly smelting has promoted the application of silicon calcium alloy in reducing fluoride emissions - it partially replaces the function of traditional fluorite and reduces the impact of slag on the environment. The value of silicon-calcium alloy is just like an experienced mediator: it does not take over the main role, but uses precise chemical reactions to bridge the gap in metal performance.
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