D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
9/36.7
D21C 11/04 (2006.01) D21C 11/00 (2006.01) D21G 9/00 (2006.01)
Patent
CA 2003112
Method and apparatus for the treatment of calcium carbonate slurry as residue from the manufacture of paper. ABSTRACT In a method and using an apparatus for carrying out the method for the treatment of calcium carbonate slurry ("mesa"), which is a re-utilizable residue from the causticisation of sodium carbonate with burnt lime in the manufacture of paper after the sulphate process, the lime sludge or "mesa cake" is conditioned in a mixer (21) with dry, powderous raw material (CaCO3) to a loose, moist mesa pulp which is fed to the lower end of a riser pipe (17) constructed as a flash duct wherein the mesa pulp is suspended, dried and pulverized by means of hot smoke gas from a kiln (1), whereupon the dry, powderous product is separated from the smoke gas in a separa- tor (18) and fed to the kiln (1) for further treatment in same. (Figure 3)
Borden Ladner Gervais Llp
F.l. Smidth & Co. A/s
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