- 埃肯
- 先进的制造业和工业领域
- 耐火材料
- 微硅粉在定型制品中的应用
微硅粉：定型耐火材料制品的首选原材料之一
耐火材料: 采用各种材料和形式来应对各种挑战
耐火材料用于提供各种高温处理装置的内衬材料 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： 浇注料 、 预制件 和定型制品。本文研究的后者是以不同尺寸和形状交付的耐火材料。这些 " 模块 " 是预先烧制的，并使用标准的砌筑技术进行安装。这与浇注料不同，浇注料是在交货状态下直接使用的散状耐火粉料（通常转化为整体或无缝耐火内衬），与液体混合，在需要时加入一种或多种添加剂。定型制品也与预制件不同，预制件是模制或预铸组件，其形状通常很复杂，用于直接安装在熔炉和窑炉的功能部件中。
埃肯微硅粉 (MICROSILICA®)：高性能定型制品的质量标杆
定型制品或耐火砖的优点在于，其尺寸和成份含量可以定制，以适应温度分布和热变化，防止腐蚀和炉渣，排斥与耐火内衬接触的熔融材料，并适应外壳的几何参数。定型制品还可在安装过程进行广泛的选择，同时还考虑经济因素，如材料成本、所需设备、人工成本、劳动法规和合同或监管要求，以及时间限制、安装技能和当地服务提供商的可用性。
定型制品的性能可用 微硅粉 来定制，以满足特定的加工和最终产品特性，并为耐火材料制造商提供额外的优势，即在安装前进行场外预测试，确保满足客户的应用要求。这使得制造商可以根据耐火外壳的尺寸、规格、物理性能和耐化学性方面准确选择所需的形状，以确保关键部件在高温和可变加热 / 冷却循环下的完整性，并能耐化学腐蚀和机械应力。定型产品制造商还可用添加剂来改善干粉的流动性、提高密度，并在高温下获得毫石 / 镁橄榄石的形成。
微硅粉
埃肯是微硅粉技术的全球领导者，为定型耐火材料提供多种 ELKEM MICROSILICA® 产品。这些硅或硅铁生产工艺中产生的副产品由超细无定形二氧化硅（SiO2）球体组成，具有纯度高的特性，可对各种高温应用的特定性能要求产生重大影响。
以下是我们用于制作定型制品的产品非详尽列表，其中许多产品也适用于浇注料（非成型产品）和预制件。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：
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
了解用于耐火应用的不同硅基材料，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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