Nov 22 (Reuters) - KGHM KGH.WA :
* SAYS OCT. PAYABLE COPPER PRODUCTION AMOUNTED TO 56.7 THOUSAND TONNES, DOWN 0.5% YOY
* SAYS KGHM INTERNATIONAL RECORDED A DECREASE IN PRODUCTION OF 36% MAINLY DUE TO THE LOWER QUALITY OF ORE EXTRACTED BY THE ROBINSON AND SUDBURY BASIN MINES
* KGHM POLSKA MIEDZ SA AND SIERRA GORDA REPORTED +4% AND +39% INCREASES IN PRODUCTION RESPECTIVELY
* SAYS OCT. SALES OF PAYABLE COPPER AMOUNTED TO 61.9 THOUSAND TONNES AND WERE SIMILAR TO THE LEVEL OF SALES IN OCTOBER 2017
* SAYS OCT. SALES OF SILVER AMOUNTED TO 151.2 TONNES AND WERE HIGHER BY 10% COMPARED TO OCTOBER 2017