초록 ▼

A process for the production of heated aggregate mix, such as bituminous mix, and a reactor for carrying out the process. In one aspect, the process entails the control of gas flow through a tumbler drum, preferably by controlling exhaust from the drum, in dependence upon the continuous monitoring o

A process for the production of heated aggregate mix, such as bituminous mix, and a reactor for carrying out the process. In one aspect, the process entails the control of gas flow through a tumbler drum, preferably by controlling exhaust from the drum, in dependence upon the continuous monitoring of a parameter, such as gas pressure within the drum. In a second aspect the aggregate contents of the drum are heated by using a burner to preheat the gas flow, a technique which permits admission of the drum feed as a homogenous stabilized mix.

대표청구항 ▼

A method of producing a heated aggregate mix comprising the steps of: feeding base products including an aggregate mix into a closed treatment chamber via a base products feed port; maintaining a flow of gases through the chamber; tumbling the base products in the chamber while heating them, by mean

A method of producing a heated aggregate mix comprising the steps of: feeding base products including an aggregate mix into a closed treatment chamber via a base products feed port; maintaining a flow of gases through the chamber; tumbling the base products in the chamber while heating them, by means of a burner disposed at one end of the treatment chamber, to a temperature sufficient to convert the base products to a heated mix of desired specification; and retrieving the heated mix from the chamber via a heated mix retrieval port; and further comprising the step of supplying air to the treatment chamber at a rate which is determined automatically in direct dependence upon the rate at which fuel is supplied to the burner, and wherein said flow of gases through the chamber is controlled automatically in direct dependence upon the gas pressure monitored in the treatment chamber in the vicinity of whichever of the base products feed port and the heated mix retrieval port is nearer the burner.