December 06 , 2023

The role of alumina powder in refractory castables

The role of alumina powder in refractory castables 1. To enhance the quality of refractory castables, it is crucial to minimize the calcium aluminate cement content while maintaining satisfactory strength and high-temperature mechanical properties. The key lies in optimizing particle packing density. 2. Incorporating alumina micro powder, submicron powder, or even nano-alumina powder into refractory castables effectively reduces the CaO content, minimizing the formation of low melting phases at high temperatures and improving the castables’ high-temperature mechanical properties. It also enhances the medium temperature strength, reduces water usage, and increases the castables’ density. 3. Alumina micro powder plays a vital role among different types of castables. Its particle size, distribution, and specific surface area significantly impact the performance of refractory castables. Adding alumina micro powder to fill the gaps between aggregates greatly influences the castables’ performance by increasing bulk density. 4. Numerous refractory castable manufacturers have devoted extensive efforts to micro-powder technology. Utilizing composite micro-powders with diverse particle size distributions remarkably enhances packing density and reduces water consumption, benefiting mechanical properties like high-temperature flexural resistance and post-thermal shock strength. Smaller micro powder particles tend to increase fluidity and setting time of refractory castables. You are welcome to leave your comments...

Learn More >

August 29 , 2023

Shenzhen World Exhibition & Convention Center(Hall 7) Booth 7A68—WELCOME TO YUFA’S Booth

Shenzhen World Exhibition & Convention Center(Hall 7) Booth 7A68—WELCOME TO YUFA’S Booth Zhengzhou YUFA High-tech Materials Co., Ltd.  attends  the 10th Shenzhen International Thermal Conduction and Heat Dissipation Materials Exhibition! (Booth 7A68) This prestigious event, held from August 29-31, 2023, at the Shenzhen World Exhibition & Convention Center(Hall 7), brings together industry leaders and experts in the field of high-temperature materials and thermal conduction. YUFA Abrasives GROUP is proud to showcase our high-quality alumina series products, aimed at meeting the demanding needs of our top customers in the field of abrasives, abrasive tools, and beyond. At YUFA’s Booth (7A68), visitors can discover our stellar range of calcined alumina products from the Alumina for Heat Conduction (FA) Series. These highly sought-after materials are produced through a meticulous process, including high-temperature calcination, deep grinding, and careful particle distribution. The result is a product with exceptional qualities, such as a well-defined crystal shape, outstanding flowability, and a large apparent density, making them a preferred choice for various applications. Among the standout features of our FA Series is its excellent thermoconductivity. This property makes it ideal for use in thermal conductive materials, allowing for efficient dissipation of heat and ensuring the stability of crucial...

Learn More >

June 07 , 2023

YUFA Group Attend Various Exhibitions To Show High Quality Alumina To Customers Wordwhile

YUFA Group Attend Various Exhibitions To Show High Quality Alumina To Customers Wordwhile As a leader in the production and supply of high-quality alumina powders, YUFA Group is excited to showcase its exceptional range of products at the 21st China International Metallurgical Industry Exhibition. The event is taking place from June 14th to June 16th, 2023, in Shanghai. YUFA Group’s subsidiary, Zhengzhou YUFA High-tech Materials Co., Ltd, will be attending this prestigious event to present its latest range of alumina powders that will revolutionize the metallurgical industry. As one of the most significant events on the calendar for the metallurgical industry, the China Metallurgical Industry Exhibition is an excellent opportunity for YUFA Group to showcase its full range of products. With over 180,000 visitors expected to attend, it is the perfect platform for them to interact with both new and existing customers. Zhengzhou YUFA High-tech Materials Co., Ltd specializes in the production of high-density WFA, low-sodium white fused alumina, dense fused alumina, monocrystalline abrasive alumina, and magnesia-aluminum spinel. The company’s range of products will significantly enhance the productivity and performance of its customers, and it is excited to display them at the exhibition. In addition to its range of alumina...

Learn More >

July 12 , 2022

The 18th National Seven-year Academic Conference on Refractories Was Successfully Held

The 18th National Seven-year Academic Conference on Refractories Was Successfully Held   The 18th National Seven-year Academic Conference on Refractories was held in Changsha, Hunan, for three days from July 11 to July 2022. As one of the organizers, Zhengzhou Yufa Abrasives Group Co., Ltd. actively participates in the conference every year, and constantly exchanges and learns about refractory materials, improves itself, and caters to the needs of the market, in order to produce better quality and more types of refractory materials product.       The National Youth Academic Report on Refractory Materials” is a brand conference held by the Refractory Materials Branch of the Chinese Society for Metals and the Sinosteel Luoyang Refractory Institute. It is held every two years and has been successfully held for 17 consecutive sessions. The positive response and strong support from research institutes, universities, production enterprises and other units in the downstream industry, the number of participants has reached more than 500 in recent years.             Organizer:   Refractory Branch of Chinese Society for Metals   Sinosteel Luoyang Refractory Research Institute Co., Ltd.   State Key Laboratory of Advanced Refractories   Refractory Magazine Edit: Jenny Lee Email: Jenny@yfml.com...

Learn More >

May 28 , 2021

Yufa Group Won The Title Of “High Quality White Fused Alumina” Again

Yufa Group Won The Title Of "High Quality White Corundum" Again Co-sponsored by China Iron and Steel Industry Association and China Council for the Promotion of International Trade Metallurgical Industry Branch, and hosted by the International Exchange and Cooperation Center of Metallurgical Industry, the "Refractory Industry Chain Modernization Coordination Development Summit Forum and the 7th Aluminum and Silicon Refractory Materials Expo" was held at the Shanghai National Convention and Exhibition The center was held successfully today.

Learn More >