Method and tower for batching the aggregates in a plant for producing bituminous concretes and related production plant

Abstract

A method of batching the aggregates to be introduced into a mixer in a plant for producing bituminous concretes comprises the steps of, for each aggregate to be batched, filling a weighing hopper with the aggregate to be batched and operating discharge of the hopper into the mixer in a batching cycle, through a computerized control system, until the hopper weight that is detected by the computerized control system has decreased by a value that has been previously established to correspond to the aggregate amount to be introduced into the mixer. A mixing tower (12) according to the method comprises a mixer (19) and, for each aggregate, a hopper (18) provided with weighing means and fed with the aggregate to be batched. The computerized control system in a batching cycle operates discharge of the hopper (18) into the mixer (19) until the hopper weight that is detected by the computerized control system has decreased by a value that has been previously established to correspond to the aggregate amount to be introduced into the mixer. Also described is a plant (10) equipped with such a mixing tower.

Description

technical field [0001] The invention relates to a method and a tower for metering aggregates for the production of asphalt concrete, and also to a plant for the production of asphalt products. Background technique [0002] As is well known, bitumen is essentially formed from several different components such as gravel, sand, filler, binder (usually bitumen) and other substances (cork, cellulose, latex, resins, etc.) The main characteristics of the base product or the enhancement of the above characteristics. [0003] For each particular application (paving, airport runways, embankment covering, ground insulation, sports fields, etc.), asphalt is required to have different physical properties, but once these physical properties are planned and determined by the designer, the period must be complied with. For example, there is a characteristic property that distinguishes and correlates most of the different types of asphalt; this property is a particle size curve, ie a funct...

AI Technical Summary

Problems solved by technology

[0025] The use of a lower metering hopper that receives the material discharged from all the waiting silos also raises the problem that the standardization of the waiting silos is not possible since the materials are preferably The ground is considered to be part of the same silo, also due to the reduced path between the ram and the metering hopper and limits the above-mentioned excess metering error

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