Abstract: The present invention provides a coking plant. The coking plant includes a series of coke ovens, each oven including a coking chamber provided with side unloading doors. The chamber communicates with a riser provided with a coking-gas discharge pipe. The discharge pipes of each oven lead into a collecting cylinder, which is in turn connected to a coking gas treatment circuit. At least one discharge pipe of one of the ovens further includes a device for spraying pressurized liquid onto the wall of the discharge pipe. The liquid flows counter-current with respect to the direction of the flow of the gases exiting the chamber. The present invention also provides a method for controlling such a plant.

Abstract: A vacuum deposition process suitable for coating discrete articles with a zinc-rich, fully alloyed layer is described. In a process step of contacting the article with metallic Zn vapor, the temperature of the article is equal to or higher than the dew point of the Zn vapor. The process results in a coating having a uniform thickness, even on less accessible surfaces. Additionally, the roughness of the steel substrate is essentially preserved. By properly engineering the surface of the substrate, coated articles can be obtained having a roughness providing for optimal paint adhesion.

Abstract: A vacuum deposition process suitable for coating discrete articles with a zinc-rich, fully alloyed layer is described. In a process step of contacting the article with metallic Zn vapor, the temperature of the article is equal to or higher than the dew point of the Zn vapor. The process results in a coating having a uniform thickness, even on less accessible surfaces. Additionally, the roughness of the steel substrate is essentially preserved. By properly engineering the surface of the substrate, coated articles can be obtained having a roughness providing for optimal paint adhesion.

Abstract: The present disclosure concerns a process suitable for coating discrete articles with a zincrich, fully alloyed layer. A known method for the corrosion-protection of such articles comprises the steps of hot-dip galvannealing, typically followed by painting. This hot-dip process has however to be performed at a high temperature, thereby submitting the articles to severe thermal stress. A novel vacuum deposition process of Zn is therefore presented. It is characterized in that, in the step of contacting the article with metallic Zn vapor, the temperature of the article is equal to or higher than the dew point of the Zn vapor. The process results in a coating having a uniform thickness, even on less accessible surfaces. The surface roughness is well adapted for the adhesion of paint.

Abstract: The present disclosure concerns a process suitable for coating discrete articles with a zinc-rich, fully alloyed layer. A known method for the corrosion-protection of such articles comprises the steps of hot-dip galvannealing, typically followed by painting. This hot-dip process has however to be performed at a high temperature, thereby submitting the articles to severe thermal stress. A novel vacuum deposition process of Zn is therefore presented. It is characterized in that, in the step of contacting the article with metallic Zn vapor, the temperature of the article is equal to or higher than the dew point of the Zn vapor. The process results in a coating having a uniform thickness, even on less accessible surfaces. The surface roughness is well adapted for the adhesion of paint.

Abstract: The present invention provides a coking plant. The coking plant includes a series of coke ovens, each oven including a coking chamber provided with side unloading doors. The chamber communicates with a riser provided with a coking-gas discharge pipe. The discharge pipes of each oven lead into a collecting cylinder, which is in turn connected to a coking gas treatment circuit. At least one discharge pipe of one of the ovens further includes a device for spraying pressurized liquid onto the wall of the discharge pipe. The liquid flows counter-current with respect to the direction of the flow of the gases exiting the chamber. The present invention also provides a method for controlling such a plant.

Abstract: The present disclosure concerns a process suitable for coating discrete articles with a zinc-rich, fully alloyed layer. A known method for the corrosion-protection of such articles comprises the steps of hot-dip galvannealing, typically followed by painting. This hot-dip process has however to be performed at a high temperature, thereby submitting the articles to severe thermal stress. A novel vacuum deposition process of Zn is therefore presented. It is characterized in that, in the step of contacting the article with metallic Zn vapor, the temperature of the article is equal to or higher than the dew point of the Zn vapor. The process results in a coating having a uniform thickness, even on less accessible surfaces. The surface roughness is well adapted for the adhesion of paint.