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exploitation of limestone is made by the "open pit" system or under the open sky. The work begins with prospecting and assessment to quantify and learn about the quality of the deposits of limestone, if necessary, the opening of roads and subsequently prepare the beaches or banks of export.

Exploitation

mining work in the quarries is of open pit mining, being the exploitation of selective type, the production banks they are descendants of approximately 3.5 m to 4.0 m in height, has several levels or exploitation such as beaches: hope, Vico, PlasuLlallaguani Island, Chuñuni, San Severino and quarry B.

startup is using drilling and blasting, drilling is used 14 feet boreholes and 3.5 inches in diameter and a

punch TAMROCK RANGER 600, used explosives include dynamite, detonating cord and ANFO.

blown up material is removed and acopiado by two tractors Komat´su D-155AX and a tractor CAT D8-R, loaded by two Chargers front CAT 988F and 966 G private trucks of approximately 14 cubes that are responsible for transporting from labour fronts to the crushing plant.

daily transport that is carried out is of 2500 to 3000 tons day fed to crushing.

Reception

the raw usually shows fluctuations in its membership therefore COBOCE IRPA-IRPA carries out measurements of quality to all material that enters the plant, thus guaranteeing a controlled process and the quality of the product end.

Shredding

is the process of reduction in size of the raw material to diameters suitable for the next stage. The limestone is crushed in the quarry about 20 km from the plant, and the rest of the raw materials (iron, clay, plaster and pozzolana) are crushed in the plant. In the process of crushing the thick material enters the camera of grinding where is reduced in size until the residue on sieve of pl. 1 not exceeding 25%.

crushed limestone is stored in silos and after the respective quality control, sent to plant through volquetas.

Pre-homogenization

the chemical composition of limestone depends on the area of operation, this fluctuation causes the crude milling process is more difficult the preparation of the components (limestone, clay, iron) in such a way of having a stable process and a clinker in high quality in the process of calcination.

to do this is, the process of prehomogeneización that offers the following advantages: "Best use of quarry materials"; "Greater uniformity of raw flour and therefore greater regularity of the clinker".

pre-homogeneización method, used is the longitudinal stacking or mixing layers (method Chevron). The material that falls to the base is picked up and moved by a conveyor of buckets that download in a tape that leads him to the hangar downloading directly to the dosing hopper of the mills of crude oil.

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Technical assistance to the client, Telfs: 4453702/04411-7296 Cochabanba Office Central: Av. Libertador Boliviar N 1638 are/fax: 4451507-4457508 email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it. . Central distribution: Avenida Blanco Galindo km. 10 1/2 area Piñani Tel: 4350552-4350518