TECHNICAL CERAMICS FOR INDUSTRIAL ELECTRIC FURNACES
SIM S.r.l. is a company specialized in the manufacturing of technical ceramics for high temperatures. These products are used in several industries, such as: ceramics, jewelry, dental equipment, nonferrous alloy foundries, metallurgy, glass, food and petrochemical. With these technical ceramics, we produce pipes, tubes, supporting plates, pressed/extruded and cast shaped materials.
The production run is carried out on three different processing: extrusion (pipes and tubes), pressing (plates, hollow tiles, circular sectors) and casting (molded parts of any shapes, non-mechanically feasible). Innovative is also the under-vacuum casting department by means of de-pressurized tanks, to make mixtures in complete absence of air and in closed porosity (metallurgy, foundry and petrochemical industries).
Continuous studies applied in the manufacturing departments led us to optimize the production of standard mixtures on presses, with low and medium levels of alumina, eliminating long necessary steps of material sedimentation and reducing labor costs.
To produce tubes and special items with different diameters and shapes with medium and high alumina content, we are equipped of specific drawbenches. Continuous improvements within the mixtures and wire-drawing technologies department made possible the development of high quality technical ceramics, both for mechanical properties and for structural properties.
For production of high alumina content ceramics, as well as ceramics on customer’s drawing and ceramics of Mullite, Zirconium-Mullite, Silicon Carbide and Cordierite, we have set up a casting department where, in addition to a large investment in molds and equipment, we have invested in highly qualified workers.
We have gas and electric furnaces so we can choose the best firing cycle for each single product. The target reached is the perfect sintering of the technical ceramics.
These mixtures are used for manufacturing of electric and/or gas industrial furnaces; they are iron removed and for this reason they guarantee an excellent support for bare wire and / or armored electric heating elements. In addition to a wide range of items presents in our brochure, we can also produce molded parts on customer’s drawing, with different alumina content to increase the performances.
MELTED SILICA SIM.SIO2, SIM.SIO2/SV e SIM. SIO2/STEEL
This is a highly resistant preformed refractory (“T” runners, casting vases, pouring cups, shells) and thermal insulator with high resistance to metal corrosion. It is used to transport and dose liquid aluminum in casting processes. Thanks to its specific features, this product is treated in vibrating tables and special furnaces with special temperatures for a complex thermal sintering process. After the firing, a liquid preparation made from boron nitride is added.
The “SV” mixtures are produced by vacuum-casting technology that guarantees complete absence of porosity to the mixture. Thanks to this production process, we can introduce a 86% of melted silica in the mixture, providing better resistance to the product itself.
The “STEEL” mixtures are produced by vibrating / jet and AISI 310/S metal needles are added to reduce the erosion caused by the passage of nonferrous alloys in the molten state.
SILICON CARBIDE SIM.SIC 70 – 80
Traditional refractory mixture in Silicon Carbide, used in the manufacturing of technical ceramics parts for the foundry industry or for the manufacturing and maintenance of industrial furnaces. The SIC70 mixture is used in the production of thermocouples protective shields and of riser pipes used in dosing furnaces. The SIC80 mixture is used in the production of soles and tiles for industrial electric furnaces. Both the mixtures can be “engobed”, that means treated with 99% alumina to increase the mechanical strength.
STABILIZED ZIRCONIUM SIM.ZIRK 70 – 80 – POT – SV
Used in the production of:
- nozzles for the manufacturing and petrochemical industries;
- tubes of different diameters and length used as receptors of smoke and unburned products;
- crucibles, tubes and shaped materials for the steel industry;
- riser pipes, measuring tubes and low pressure tubes for the non-ferrous metals industry.
In addition to the traditional ZIRK70 and 80 mixtures, we have added two new generation mixtures:
- POT alumina enriched mixture to increase high temperature resistance;
- SV mixture produced with vacuum-casting technology to eliminate products porosity.
INSULATING CERAMIC SIM.CAST 120 – 140 – 170
Pre-shaped fibrous refractory (hot boxes, floats, nozzles) to transport and dose liquid aluminum in the casting processes. This product is also used by furnaces manufacturers as an insulating material, where they need more rigid and solid products than the fiber. Given its specific features, this product is treated on vibrating tables and fired in a special ventilated furnace, at controlled temperature. The CAST.120 mixture is dedicated to the production of nozzles, floats and hot-tops, the CAST.140 is dedicated to the production of ducts, while the CAST.170 mixture is dedicated to the production of ladles.
SILICON NITRIDE SIM.NSIC
Mixture composed of a mix of Silicon Nitride and Tabular Alumina (Aluminum Oxide). This mixture is premixed dry and then kneaded and extruded using a special depressurized drawbench.