From power generation to cement cyclones and coolers, steel ladle covers to petrochemical plants, the balance between minimizing energy loss while maintaining high strength and volume stability in applications above 1300C inevitably means making a tradeoff between a two component lining or accepting high heat losses. Traditional light-weight materials based on vermiculite, cenospheres or other light-weight aggregates typically suffer from needing high cement contents and high water demand to allow for good casting properties. The trade-off is extreme shrinkage when put in use above 1300C or alternatively very poor wear resistance, forcing alternative solutions that are not optimized for thermal efficiency.
Can you imagine a light weight aggregate that allows you to produce a range of castable formulations that can have a similar ultimate refractoriness to the benchmark MULCOA® 47?
To understand the performance, the first step is to understand the production process of typical light weight aggregate. Density is linked to the true density and porosity of a material, so to create a light weight chamotte, you simply add pores. However, it is the internal structure of these pores that limit suitability for monolithic applications as they have a very high proportion of open porosity and this leads to large water demands and an aggregate and final product that typically low crushing strength.
Introducing MULCOA® 43LW, not just your average lightweight material. Using a proprietary industrial process, Imerys Aluminates are able to create a refractory aggregate that seals a high proportion of the open porosity leaving a high strength refractory aggregate that has an improved insulative behavior but is still suitable for a range of monolithic applications.
Capable of being used in low-cement castables, pumping grades, dry and wet gunning grades and high strength insulation grades and suitable for use in products rated to 1450C and beyond, MULCOA 43LW based castables maintain hot strengths compared to equivalent alumina products while lowering density, thermal conductivity and maintaining CO resistant behavior.
Offering the opportunity in specifically adapted castables to reduce surface temperatures and increase thermal efficiency, MULCOA® 43LW opens possible new lining concepts to better meet the changing needs of modern refractory applications giving refractory lining designers the chance to save time or reduce risk via new solutions.
For more information on MULCOA® 43LW contact your local Imerys Aluminates contact or visit us at Ceramitec 2018 on booth 209/310 in Hall A6.
Next Wednesday, March 7th IREFCON 18 will open its doors for the 12th India International Refractories Congress to share information, refractory experts experiences and ideas, to learn and to update the refractory industry in as many aspects of refractories development and applications as possible. Our refractory experts will of course attend this major Indian event and contribute with two technical works.
March 8th at 2 pm, Dr. Danilo Frulli, will lecture “Natural and synthetic aluminas and aluminosilicates: properties and characteristics of the main classes of refractory raw materials”.
March 9th at 3.30 pm Florian Ahouanto will present “Andalusite based raw materials for refractory castables: properties and application”
The two speakers, as well as Ananth Nonavinakere and Dirk van den Heever shall be very pleased to answer any questions you may want to address during the event.
This biannual conference is organized by IRMA, the Indian Refractory Makers Association which is the national organization for the refractory manufacturing companies in India. It currently has 75 manufacturing units in its membership which produce a wide range of insulating, abrasion-resistant and corrosion-resistant refractories, ranging from firebricks, insulating refractories to a wide variety of high alumina, silica, magnesite and specialty refractories.
IREFCON 2018 takes place at the well-known Hotel Vivanta by Taj – Dwarka New Delhi, Sector 21 Metro Station Complex, Dwarka, New Delhi.
Today, the 2017 results for the Imerys Group have been commented on by Gilles Michel, our CEO, to the financial community. During this communication, he announced the creation of a new division resulting from the combination of the Refractory Minerals and Kerneos divisions: Imerys Aluminates!
In turn, I am pleased to announce the birth of our division, «Imerys Aluminates», one of the Group’s twelve divisions. Imerys Aluminates!
Firstly, it is under this name that the smart alignment I have been talking about over the past months will be achieved;
Secondly, under this name that we will, together, combine the skills of over 2,350 professionals;
Thirdly, under this name we will together strengthen our expertise, to better serve our customers and support our growth through geographic development and innovation.
Imerys Aluminates: It’s not only our name, it’s also a unified management frame that will drive and direct the legal entities forming Refractory Minerals and Kerneos, without changes to your employment conditions or contracts. Each
company therefore retains its legal autonomy, as is the usual case within Imerys Group divisions. A deployment plan for this new name is currently being prepared. It will be soon communicated to properly structure this change of identity and its impact on our various internal and external communications.
To conclude this short message, I wish to express once again my enthusiasm and my conviction that this combination of Imerys Refractory Minerals and Kerneos is a great opportunity for all of us and for our customers: we are complementary and together we will be even better !
14th edition of International Exhibition on Foundry Technology, Equipment, Supplies, Services will open tomorrow! Come and meet us on our stand L05 in hall 9 during the two days of the event. Philippe Diaz, our foundry expert from France and Arpan Shah, our foundry sales manager India shall be happy to welcome you. Take time to discover a major new product we present at the fair: Kersand 100-400, a new refractory sand our laboratory designed as an alternative material for massive casting in iron and steel. The product matches all foundry requirements.
Over the years IFEX has emerged as the most important platform for the foundry industry of the Indian Sub-Continent. IFEX with its rotational policy to organize the fair in different zones of India (North, South, East & West) on a pre-defined cycle helps its exhibitors to reach their potential customers from all over the country.
St. Louis Section and the Refractory Ceramics Division of the American Ceramic Society sponsor the 53rd annual St. Louis spring meeting on refractories with the theme, “Real World Applications of Refractory Testing”. This year, Imerys Refractory Minerals’ contribution to ACerS will come through Scot Graddick, Technical Director and Product Manager of Mulcoa and Teco. He will address “The effect of aluminosilicate calcine quality on finished monolithic refractory hot properties” at 8.45 am, Wednesday 29th March.
The study was undertaken by Scot Graddick, Dave Tucker, Chris Beiter, Danilo Frulli from Imerys Refractory Minerals and Steffen Möhmel refractory engineer from the Center for Abrasive & Refractory Research & Development C.A.R.R.D The outcomes and results will be presented for the first time during the ACerS spring meeting.
The event will take place March 29 – 30, 2017 at the Hilton St. Louis Airport Hotel 10330 Natural Bridge Rd St Louis, Missouri 63134 United States.
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During ICRJ 2017, Danilo Frulli, Marketing & Innovation Director of the Imerys Refractory Minerals division will contribute to the event with an abstract entitled “Properties of Andalusite and Mullite minerals and their applications in the steel & iron industry”.
Dr. Frulli will be speaking Thursday, 8thFebruary at 9.45 am at the Wave International in Jamshedpur. Feel free to join the conference. For any specific information, please contact our local Sales Director, Ananth Nonavinakere : firstname.lastname@example.org
In its December edition Casting, Plant and Technology International published the following article about the key role of Kerphalite KF for precision casting written by Joachim Wolff (Imerys Refractory Minerals), Sabine Umla-Latz and Martine Dahlmann (Hüttenes-Albertus).
Complex cast parts such as turbocharger housings play a central role in the design of modern high-performance engines. Due to its particular characteristics, silica sand has its limits as a moulding material when it comes to casting finely structured components, reduced wall thicknesses and perfect surfaces. Thanks to its high temperature load strength and a strong resistance to metal penetration, Kerphalite™ KF, a special sand produced in Brittany for special applications in the foundry industry, has proven itself suitable for these types of applications in many foundries.
In central Europe, silica sand is available in large quantities and in good qualities, and is widely used in foundries as an economical basic moulding material. But it also has negative properties, which may lead to problems when producing sophisticated castings. These particularly include the so-called quartz inversion, i.e. the abrupt expansion of the specific volume at 573°C. It occurs during virtually every casting process and may lead to sand expansion defects, mainly in the form of finning (also called veining). The moulding material can crack under high temperature load, allowing liquid metal to seep into the resulting cracks and cavities. To read the article on pages 14 click on following title “Kerphalite™ KF : high performance moulding material for precision casting”