2 декабря, 2015 
Pokraskin The lamp black process (Figure 4.7) is the oldest commercially used carbon black production process [4.8, 4.15].
However, besides the general principle, today’s lamp black production units have very little in common with the ancient carbon black ovens. Smoking chimneys and settlement chambers have been replaced by highly sophisticated filtering systems.
The lamp black apparatus consists of a cast-iron pan that holds the liquid feedstock, which is surmounted by a fireproof flue hood lined with refractory bricks. The air gap between the pan and the hood, as well as the vacuum present in the system, help to regulate the air supply and thus enable the manufacturer to fine-tune the carbon black’s ultimate properties. Though radiant heat from the hood causes the raw material to vaporize and partially combust. Most of it is converted into carbon black.
In order to separate the solids, process gases containing carbon black are passed through a filter after the cooling stage. Onward processing is similar to that of the furnace black manufacture.
These carbon blacks are characterized by a broad primary particle size distribution, ranging from approximately 60 to over 200 nm and are widely used in a number of specialized applications.
4.4.4
Опубликовано в рубрике 