Calcination temperature influence on the quality of ceramic proppant of

  Firing a ceramic proppant production in the last process, have a great impact on its microstructure and macroscopic proppant suppliers . After determining the ratio of the sample will produce a fine powder in the firing process at a lower temperature between the liquid phase, while also British to the reaction and petrochemical corundum phase transformation occurs, it is necessary to control the firing temperature, so that maintained in an optimum temperature range, thus ensuring after firing has an excellent overall performance. If the temperature is too high there will be over-burning phenomenon, and ferric oxide (Fe203) of content. After generating the liquid surface, hindering oxygen diffusion to the center, then it will happen Fe203 = 2Fe0 + I / 20z reaction. Due to the volume effect of the strength and density of the reaction products are reduced. If the calcination temperature is too low there will be less burning phenomenon, due to insufficient sintering, its intensity is reduced. In the production process of the actual situation shown in Figure 4.5.
The figure shows that the firing temperature has little effect on the bulk density, but have a greater impact on the fragmentation rate and acid solubility. Minimum breakage rate corresponding firing temperature was 1360 ℃, while the corresponding acid solubility best when firing temperature is 1350 ℃. Therefore, in order to obtain the desired combination of properties, the firing temperature must be controlled at between 1350-1370 ℃; to producing a high strength low density proppant , the firing temperature should be controlled at about 1360 ℃, the solubility of the acid <5%, can meet Claim.