用于可铸造耐火材料的微硅
提升铸造耐火材料的高温和机械耐久材料
耐火材料：掌握一个多功能且复杂的工艺
可铸型耐火材料要么按原浇送使用，要么在添加一种（或多种）液体或添加剂后使用。它们必须满足多个有时相互矛盾的规范：
- 保护窑体或炉壳免受高温影响，同时保持持续高温并尽可能减少热量流失
- 防止壳体、原材料和最终产品之间产生不必要的反应，如磨损或化学反应
- 能够抵抗化学攻击以及因极端高温或周期性加热/冷却循环引起的机械应力。
微硅（Microsilica）已成为硅气的通用名称，是解决这些复杂加工挑战的关键成分。它通过亚微米颗粒为耐火材料增添了多项有利特性，有助于混凝土和耐火混合物中的高效颗粒填充，便于以最小加水量生产自流动的铸料，并具有高温度和高机械耐受性。
为可浇筑耐火材料做出正确决策
自20世纪80年代以来，Elkem 硅产品一直是微硅技术的全球领导者，一直走在耐火材料技术开发的前沿。Elkem 微硅®粉末是硅或铁硅制造的副产品，主要由超细、非晶态的二氧化硅球体（SiO2）组成。它们具有高纯度性能，对耐火铸物的性能有显著影响，尤其是在耐火材料结合阶段，温度高于1250°C。
Elkem MICROSILICA®还具备颗粒粒径分布（PSD）的控制功能，这是开发致密耐火铸料的重要因素。它还提供了所有类型耐火材料的具体性能和优势，包括低水泥浇注材料（LCC）、超低水泥注浆（ULCC）和无水泥（NC）铸造物。
Elkem MICROSILICA®耐火铸造产品的优点包括：
- 改进流动、颗粒填充和调整密度水平，便于铸造
- 烧结过程中的反应性，有助于降低烧制温度下的陶瓷结合力
- 下层气体形成
- 应用多样性，包括喷射混合物、喷射混凝土等。
- 凝胶键合
- 提升热强度性能和保证稳定性
以下是我们用于铸造耐火材料加工的产品非详尽列表。Elkem 专家、技术人员和销售人员随时为您提供针对您具体应用的合适解决方案：
耐火材料用硅基材料
Elkem Microsilica® 971
The ELKEM MICROSILICA® 971 product, a high quality, purpose-made, low-impurity grade, for versatile applications in refractories, available in densified (D) or undensified (U) form, to be used in advanced refractory products such as self-flowing, low, ultra-low and no-cement castables.
Product data sheet
Elkem Microsilica® HQ
The Elkem Microsilica® HQ product is a cost-effective alternative for low cement castables, with controlled and stable chemical composition, based on low alkalis and higher reactivity.
Elkem Microsilica® 968
The ELKEM MICROSILICA® 968 product, a cost-effective alternative for low cement castables, featuring a controlled and stable chemical composition.
Product data sheet
Elkem Microsilica® 955
The Elkem Microsilica® 955 product, a medium-quality grade silica fume with tight specification limits based on in-process control, resulting in higher silica content and reduced impurities.
Product data sheet
SioxX®
Designed for microsilica-containing LCC and ULCC, based on Al2O3 - SiO2 system with quick wet-out and low water demand.
SioxX®-Quick
Designed to act as an accelerator in undispersed aluminosilicate systems like dry gunning LCC and ULCC mixes without clay.
SioxX®-Zero
Designed for microsilica-gel bonded systems (NCC) to control the working and demoulding time and to develop high green-strength at room temperature.
SioxX®-Flow
Designed to work as a multi-functional microsilica dispersant, for aluminosilicate LCC, ULCC and NCC, giving customers freedom to fine-tune their products with other additives (accelerators, retarders, etc.). It enhances the rheological properties, reduces the water demand and increases the flow. Suitable also for shotcreting.
By combining both SioxX®-Flow and SioxX®-Set products, setting can be controlled. SioxX®-Flow product will also work in combination with Silica-Sol (colloidal silica) in NCC to control flow, working and setting time.When used in silica-sol systems a separate gelling agent needs to be added.
SioxX®-Set
Designed for undispersed systems mainly for NC gunning mixes. Can also be used for LC and ULC gunning. In castables and shotcrete (dispersed systems) SioxX®-Set can be used as accelerating agent.
SioxX®-Ten / SioxX®-Ten PLUS
SioxX®- Ten and SioxX®- Ten PLUS are primarily designed for ultra low cement alumina-based or microsilica-gel bonded no-cement castables.
SioxX®- Ten mainly works at the range of 800-1100ºC, while SioxX®- Ten PLUS is recommended to work at the range of 600-900ºC.
Both of them enhance the rheological properties, reduce the water demand, increase the flow, control the working and de-moulding time, help develop high green strength as well as high strength at the indicated working range of temperature.
SioxX® Mag
Designed for basic (MgO-based) refractory castables, to help avoid inherent problems of crack formation and poor workability. For advice how to best use our Specialties, contact our competent technical staff.
如果您正在寻找我们的产品安全数据表，也可以到我们的产品安全数据表中心查询
耐火材料技术：通过可持续技术保持Elkem的领导地位
耐火材料技术不断演进，采用替代材料和产品配方，如原材料开发和更强化合成矿物。这些变化源于对更高热效率、成本效益和可持续性的需求，例如使用回收金属和减少能源，转向更多低碳和可再生燃料，包括在冶金中使用氢气和电弧炉（EAF）等新技术。在研发方面，Elkem 耐火材料产品设计还注重延长使用寿命，提升人员和工厂的安全。
了解适用于耐火材料的不同硅基材料，每种材料都有独特的性能，专为高温环境需求而设计。
关于耐火材料的更多应用信息
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