Technique for firing spinel-type black ceramic material with tunnel kiln

TLDR: In this paper, a spinel-type black ceramic material with a tunnel kiln was fired with a saggar by 70-80% full, and naturally cooling the calcining product, wherein the technological conditions for calcination were as follows: the temperature of the preheating region is 1170-1250 DEG C, the high-temperature region is 1200-1300 DEGC, and the transmission speed is 12-20 hours from charging to discharging.

Abstract: The invention discloses a technique for firing a spinel-type black ceramic material with a tunnel kiln, which comprises the following steps: 1) uniformly mixing 25-40 wt% of chrome oxide green, 30-45 wt% of iron oxide red, 2-25 wt% of cobalt oxide, 10-20 wt% of nickel protoxide and 0-20 wt% of dopant; 2) filling the mixture obtained in the step 1) into a saggar by 70-80% full, calcining in a tunnel kiln, and naturally cooling the calcining product, wherein the technological conditions for calcination are as follows: the temperature of the preheating region is 1170-1250 DEG C, the temperature of the high-temperature region is 1200-1300 DEG C, and the transmission speed is 12-20 hours from charging to discharging; 3) pulverizing and grinding the cooled calcining product; and 4) adding concentrated hydrochloric acid to wash the calcining substance powder obtained in the step 3), stirring to sufficiently react, stirring, washing with water until the pH value is 7, drying and screening The ceramic pigment has the advantages of high color development capacity and low cost