- 埃肯
- 先进的制造业和工业领域
- 耐火材料
- 微硅粉在浇注料中的应用（不定形耐火材料）
微硅粉：耐火浇注料的关键原材料之一
耐火材料：掌握多功能和复杂的流程
耐火材料用于提供衬里
Elkem for refractories: lets make a castable
在各种高温处理装置中：从温度为 600 °C 的烹饪烤箱到 1700 °C 以上的铁水处理，再到 温度为 1100 °C 的石化加工、1450 °C 的水泥熟料烧结等。根据不同的矿物和化学特性，耐火材料以不同的形式设计和供应：预制件、定型制品和浇注料（也称为不定形耐火材料）。后者是本文的主题，在交货状态下或添加一种或多种适当的液体或添加剂后直接使用。
耐火材料必须符合一些技术要求，这些要求有时相互矛盾：
- 保护炉体或炉壳的完整性免受高温的影响，同时尽量保持连续高温并减少热损耗
- 防止在炉壳、原材料和最终产品之间发生不良反应，如磨损或化学反应
- 耐抗极端高温或周期性加热 / 冷却循环引起的化学侵蚀和机械应力。
微硅粉已成为硅灰的通用术语，是解决这些复杂加工挑战的关键成分。得益于其亚微米级颗粒，它为耐火产品提供了若干有益的特性，这有助于在混凝土和耐火混合物中实现高效的颗粒填充，以便添加最少的水来生产自流浇注料，并可以提升耐高温和耐机械冲击等性能。
Refractories: main industrial applications
在不同的工艺中选用适当的耐火浇注料
自 20 世纪 80 年代以来，埃肯硅产品一直是微硅粉技术的全球领导者，在耐火技术的开发方面处于领先地位。 埃肯 MICROSILICA® 粉体是硅或硅铁生产工艺的副产品，主要由超细无定形二氧化硅（SiO2）球体组成。他们具有高纯度的特性，这会对耐火浇注料的性能有较大的影响，尤其是在温度高于 1250 °C 耐火材料的高温结合相的形成阶段。
埃肯 MICROSILICA® 对粒度分布（PSD）还具有控制作用，这是开发致密性耐火浇注料的重要因素。埃肯 MICROSILICA® 在各种类型的耐火材料方面都具有特定的性能和优势，包括低水泥浇注料（LCC）、超低水泥浇注料（ULCC）和无水泥（NC）浇注料。
埃肯 MICROSILICA® 耐火浇注料的优点包括：
- 改善了流动性、颗粒填充和调节致密性，便于浇注
- 烧结过程的反应活性，有助于在较低的燃烧温度下改善陶瓷的相结合
- 产生的气体少
- 应用广泛，包括干法喷涂料，湿法喷涂料等
- 凝胶结合
- 改善高温强度性能，确保产品稳定性
这是我们用于耐火浇注料加工的产品的非详尽列表。埃肯专家、技术人员和销售人员可以为您的特定应用探索适当的解决方案：
Silicon based materials for refractories
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
耐火技术：通过持续的技术改进保持埃肯的领先地位
耐火材料技术在不断发展，使用替代材料和产品配方，如不断发展的原材料和更多的增强和合成矿物。更高热效率、成本效益和可持续性的需求推动了变革，例如使用回收金属和更少的能源，向更低碳和可再生燃料的转变，包括在冶金中使用氢和电弧炉（EAF）等新技术。在产品研发方面，埃肯耐火材料产品的设计也注重更长的使用寿命，提高人员和工厂的安全性。
了解用于耐火材料的不同硅基材料，每种材料都具有独特的特性，专为满足高温环境的需求而制造。
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