Simulación del proceso de trituración con la aplicación del software METSIM en las operaciones de la Planta de Beneficio León con el material de la Sociedad Minera la Ponderosa, código 390190, Provincia del Oro, cantón Portovelo, sector El Salado.

The present Curricular Integration Work called “Simulation of the crushing process with the application of METSIM software in the operations of the León Beneficiation Plant with the material of Sociedad Minera La Ponderosa, Code 390190, Province of El Oro, canton Portovelo, sector El Salado”, was developed based on bibliographic and experimental analysis. The “León” beneficiation plant has an area of 1237 m2 and is divided into three infraestructures dedicated to administration, mineral processing, mineral concentration and tailings. The pkant provides services to mine owners for the recovery of valuable minerals through and in order to whose sequence starts with mineral crushing, grinding, cyanidation, refining and smelting. “Sociedad Minera La Ponderosa, Minera Bomba de Pacchapamba Unificada”, is one of the companies that makes the most use of the service provided by the plant, so the stock available for the mining company to accumulate the material has a capacity of 755 tons, although they normally store 84 tons. Firstly, the material in stock of La Ponderosa Mining Company was characterized in a physical, mechanical, mineralogical and mining-metallurgical way, so 3 samples were analyzed in the part of physical-mechanical properties where a density of 2.96 gr/cm3 was obtained with a humidity percentage of 1.51% and a compressive strength of 96.71 MPa. On the other hand, the microscopic mineralogical description by means of X-ray diffraction analysis, thin slices and polished sections, denoted the presence of quartz minerals, calcite, kaolinite, clinoclore, muscovite, gypsum, anhydrite and metallic minerals such as galena, pyrite, chalcopyrite and gold. By determining the metallurgical mining properties in which the rock was classified as very abrasive and a Bond index adjusted to crushing of 18 kWh/ton, were indispensable for the evaluation and selection of the crushers to be implemented in the proposed crushing circuit. The crushing process currently carried out by the "León" Beneficio plant was described, which begins with the conditioning of the material with a tool called “combo”, this preparing the material for its entry into the 320 x 400 mm jaw crusher. The resulting product has a size that varies between 6 and 8 cm. It works at a capacity of 10 tons per day, operating with a power of 10 HP. However, this work is performed intermittently. The proposed circuit was simulated, but before carrying it out, the different alternatives were evaluated and certain criteria were established to select the type of crushing circuit, crushing stages, types of crushers, types of liners and other secondary equipment that helps the automation of the new crushing circuit. Based on the calculation of the global reduction rate 5 (i=20), two crushing stages were established (primary and secondary). The implementation of a closed circuit versus an open circuit was evaluated, the latter being selected because the closed circuit presented a high percentage of circulating load (213%). As mentioned previously, since it is an abrasive and highly resistant material, the 400x600 jaw crusher was chosen for the first stage of reduction, with a projection for 15 tons per hour, a power of 15 HP and corrugated toothed sleeves. Because the mineralogical characterization indicated 15% kaolinite (clay), the use of a conical crusher was ruled out in the second stage, so a 250x400 jaw crusher with a clearance adjusted to 17mm was chosen. 30 HP power and serrated and beak-shaped coatings. The other secondary equipment involved in this process begins with the implementation of a hopper designed for a projected capacity of 150 tons, with bars at the upper place separated every 32 cm, which help a plate feeder as the first classification stage. 61.34 tons per hour, vibrating screen as a second stage of classification, whose retained material will be transferred through the use of a conveyor belt to the primary crusher and the material that passes is transferred together with the product of the first crushing to the secondary crusher with the help of a conveyor belt. The economic valuation of the entire circuit showed a value of 59,652.5 USD METSIM through the simulation of the crushing circuit, gave as results correct mass balances, distribution and granulometric curves, and passing percentages (80) in the 13 streams established for this circuit that comply with the conditions required to improve the crushing efficiency. Keywords: Crushing, reduction degree, circulating load, open circuit, jaw crusher, METSIM.

• 1. autor: Jiménez Chocho, Laura Araceli (author)
• Format: bachelorThesis
• Język: spa
• Wydane: 2024
• Hasła przedmiotowe: TRITURACIÓN; GRADO DE REDUCCIÓN; CARGA CIRCULANTE; CIRCUITO ABIERTO; TRITURADORA DE MANDÍBULAS; METSIM
• Dostęp online: https://dspace.unl.edu.ec/jspui/handle/123456789/31635