Antton Meléndez

Tecnalia · Casting & Steelmaking

Aerosol size distributions from ferrous foundry cupola furnaces vary depending on semicontinuous process dynamics, time along the tap-to-tap cycle, dilution ratio, and the physical and chemical nature of the charge and fuel. All of these factors result in a highly time-dependent emission of particulate matter (PM) 2.5 pm or less in aerodynamic diam...

The use of optimization algorithms to adjust the numerical models with experimental values has been applied in other fields, but the efforts done in metal casting sector are much more limited. The advances in this area may contribute to get metal casting adjusted models in less time improving the confidence in their predictions and contributing to...

The use of the thermomechanical simulation is very infrequent in the metal casting industry although the associated results are really useful for the manufacturing process. The main reasons are the complexity, the long calculation times and the difficulties to interpret the results. The parts manufactured by metal casting processes cool from its f...

Metallic glasses and high entropy alloys.... is disorder the key to future materials?

http://hdl.handle.net/11556/401 The use of numerical simulation in the metal casting industry has experienced a significant increase during last years and today is quite extended. In spite of that, the true is that obtaining reliable simulations of this type of processes is not a trivial task. The use of the appropriate values for the model paramet...

Development of a new aluminium alloy

Aluminium casting alloy

MELËNDEZ, A. (2016). Aportación a la medición esporal sistemática en ayuda de la determinación de especies mediante una herramienta estadístico-matemática: Cantharellus cibarius Fr. y especies afines. Yesca 28, 2016. With this paper, the author wants to show how the systematic spores print measurements, properly treated by means of statistics, can...

The simulation of the High Pressure Die Casting (HPDC) process is a complex type of simulation. The industrial procedure is based on consecutive manufacturing cycles that must be taken into account in the simulation. Moreover the part geometries use to be complex and the alloy is injected at really high velocities. All of that usually implies long...

In addition to the typical difficulties associated with the numerical simulation of metal casting processes, the special characteristics of the high pressure die casting (HPDC) increase the difficulty of obtaining reliable results. The process followed to define and adjust one HPDC simulation model against experimental measurements by means of inve...

The achievement of reliable simulations, in the case of complex processes as is the investment casting, is not a trivial task. Their accuracy is significantly related with the knowledge of the material properties and boundary conditions involved, but the estimation of these values usually is highly complex. One helpful option to try to avoid these...

With this work the authors want to show how is possible to approach improved simulations to the results of the user’s plants giving a good solution for the increasing needs of accuracy. In this sense, the authors want to present an innovative experience concerning to a recently finished R&D project, which involved the development of two solutions u...

El trabajo que presentan los autores consiste en una revisión de la Sección Granulati Estadès et Lannoy del género Suillus Micheli ex Anderson a partir de la especie Suillus mediterraneensis (Jacquetant et Blum) Redeuilh para lo que se usa un método sencillo e innovador de tratamiento estadístico de las mediciones esporales y una comparación gráfic...

An ephemeral Ascomycete due to its small size and its dependence on a high degree of environmental moisture is described. Although in favorable conditions numerous specimens can be found, its growth on the hidden side of the fallen leafs in contact with the ground moisture, makes it to go unnoticed, what could explain why it is under recorded. With...

This paper presents the adjustment process of a simulation model to improve the correlation between simulation results and parts industrially manufactured. It includes the data registration at foundry plant, the preliminary set-up of the model and the later adjustment process to reach a correlation level according to the industrial necessities. The...

In this article, the author is going to present the results of a large research project related to the particulate matter within the iron foundries melting shops. It was decided to analyze the raw emissions, in other words, emissions produced behind the fabric filters, in order to assure that obtained data could complete the available low quality d...

http://www.revistadyna.com/busqueda/la-medicion-rigurosa-de-emisiones-brutas-de-particulas-en-fusion-de-hierro-como-herramienta-para-su

It is the first time this taxon is described and illustrated in Spain. It was found and collected in the autonomous regions of La Rioja and Castilla-La Mancha, close to the north and the centre of Spain respectively. The described specimen is dangerously toxic with sufficient registered cases in France. It is shown in this article how the authors c...

The emission limit value of the Incineration Directive is being assumed more and more by other industrial sectors. Following this and despite the BREF document developed by the EIPPCB does not establish a limit as an obligation to fulfil, European foundries have decided to tackle this problem which is becoming a common problem for many of them. In...

http://www.revistadyna.com/busqueda/dioxinas-en-cubilotes-hornos-rotativos-y-de-arco-electrico

This paper starts based on an advanced simulation work about casting parts of wind power turbines made in ductile iron of high tenacity. The technical goal was extracted from the a research Project, carried out with Basque Country Foundrymen Association (Spanish Foundrymen Federation), two foundries, TS Fundiciones (Zestoa-Guipúzcoa) and Fundicione...

El presente artículo surge a partir de un trabajo sobre simulación avanzada del proceso de fundición. Por su actualidad, dentro de la fundición se ha elegido un tipo muy singular de piezas como son las grandes piezas de fundición nodular ferrítica de alta tenacidad y alta resistencia a la fatiga fabricadas para aerogeneradores (Norma EN GJS 400 18L...

http://www.revistadyna.com/busqueda/estandarizacion-de-calidad-en-fundicion-de-grandes-piezas-eolicas-mediante-simulacion-avanzada-del-p

Over the years foundries have been looking for ways to improve their process. IBERIA ASHLAND and INASMET TECNALIA, together with BETSAIDE S.A.L. have implemented an innovative solution for methoding castings to ensure the integrity of the finished parts by using their latest development of customized insulating shapes combined with advanced simulat...

IBERIA ASHLAND e INSAMET TECNALIA, implementan con BETSAIDE S.A.L. una solución innovadora para la sanidad de piezas de altos requerimientos de calidad y de geometría difícil, utilizando su último desarrollo en materiales para manguitos aislantes de óptimo rendimiento (EXACTHERM (R)). Este estudio nos muestra como se pueden conseguir mejoras de car...

IBERIA ASHLAND CHEMICAL S.A. and KEMEN RECUPAC S.A. (ASHLAND Group), have been carrying out the ‘Casting Solutions’ project in one of their divisions, as yet another service for the worldwide Foundry market. The information contained herein shows the results of a joint venture between IBERIA ASHLAND CHEMICAL S.A.-KEMEN RECUPAC S.A. (The Process Pat...