Because of the effective low thermal conductivity of gypsum powder, the Lai of Dashitai needs a long time of acidity to burn through uniformly, so in combustion, the Lai should be amplified by gypsum, and the core combustion distance is not too far. In order to avoid this situation, gypsum should be burned to the Long Elbow threshold at high temperature, but in this case, most products become "soluble" and "insoluble" broken gypsum.

　　在生產條件下，6.2的水含量幾乎不可能生產半水合物。測量燃燒產生的水量通常小于或大于上述百分比。前者的產物是半水石膏(半水化合物)和硬石膏的混合物;在后一種情況下，你得到了半水合物和二水合物的混合物。

　　Under production conditions, it is almost impossible to produce semi-hydrate with 6.2 water content. Measuring the amount of water produced by combustion is usually less than or greater than the above percentage. The product of the former is a mixture of hemihydrate (hemihydrate) and anhydrite; in the latter case, you get a mixture of hemihydrate and dihydrate.

　　因此,產品不均勻的原因是,當石膏肘部燃燒時,氣體加熱到高溫蒸,蒸或其他類型的安裝在酶窯與石膏粒子或石膏的窯墻,這樣,石頭顆粒位于漢完全脫水的損失。石膏在長P6扭轉過程中自然處于運動狀態，因此高溫對石膏各陽顆粒的影響是極其短暫的。

　　Therefore, the reason for the uneven product is that when gypsum elbow burns, the gas is heated to high temperature steam, steam or other types of kiln wall installed in enzyme kiln with gypsum particles or gypsum, so that stone particles are located in the loss of complete dehydration in Han Dynasty. Gypsum naturally moves during the torsion of long P6, so the influence of high temperature on the positive particles of gypsum is very short.

　　這種效應在較大的石膏顆粒上并不像在小的石膏顆粒上那樣明顯(只有幾微米大小)，但只有在相對較短的時間內，當石膏顆粒完全脫水并變成硬石膏時才會出現。

　　This effect is not as obvious on larger gypsum particles as on the smallest ones (only a few microns in size), but only in a relatively short period of time when the gypsum particles are completely dehydrated and become anhydrite.

　　石膏中硫酸鈣至少有三種變化，即二水合物、夜石膏和半水合物。如果石膏在文瀾容器呆一段時間,容器溫度大致相同的溫度石膏時出窯,石膏的燃燒熱將轉移到石膏的一步大的顏色,使整個脫水成為,密度和水化能成為普通石膏灰泥。

　　There are at least three kinds of changes in calcium sulfate in gypsum, namely dihydrate, nocturnal gypsum and hemihydrate. If the gypsum stays in the Wenlan container for a period of time, when the temperature of the container is approximately the same, the heat of combustion of gypsum will be transferred to a step-by-step color of gypsum, so that the whole dehydration becomes, density and hydration can become ordinary gypsum mortar.

　　這樣，就可以產生有限數量的半水合物，可溶性硬石膏只能在高于半水合鹽所需溫度的溫度附近燃燒才能制成。然而，王德徹，研究表明，受控的四鈣石膏是在與半水合物相同的溫度下形成的。事實上，使用效果較差的石膏制作石膏桌是可取的。

　　In this way, a limited number of semi-hydrates can be produced, and soluble anhydrite can only be produced by combustion at temperatures higher than the required temperature for semi-hydrated salts. However, Wang Deche showed that the controlled tetracalcium gypsum was formed at the same temperature as the hemihydrate. In fact, it is advisable to make gypsum tables with less effective gypsum.