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.

　　在生产条件下，6.2的水含量几乎不可能生产半水合物。测量燃烧产生的水量通常小于或大于上述百分比。前者的产物是半水石膏(半水化合物)和硬石膏的混合物;在后一种情况下，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,产品不均匀的原因是,当石膏肘部燃烧时,气体加热到高温蒸,蒸或其他类型的安装在酶窑与石膏粒子或石膏的窑墙,这样,石头颗粒位于汉完全脱水的损失。石膏在长P6扭转过程中自然处于运动状态，因此高温对石膏各阳颗粒的影响是极其短暂的。

　　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.

　　这种效应在较大的石膏颗粒上并不像在小的石膏颗粒上那样明显(只有几微米大小)，但只有在相对较短的时间内，当石膏颗粒完全脱水并变成硬石膏时才会出现。

　　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.

　　石膏中硫酸钙至少有三种变化，即二水合物、夜石膏和半水合物。如果石膏在文澜容器呆一段时间,容器温度大致相同的温度石膏时出窑,石膏的燃烧热将转移到石膏的一步大的颜色,使整个脱水成为,密度和水化能成为普通石膏灰泥。

　　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.

　　这样，就可以产生有限数量的半水合物，可溶性硬石膏只能在高于半水合盐所需温度的温度附近燃烧才能制成。然而，王德彻，研究表明，受控的四钙石膏是在与半水合物相同的温度下形成的。事实上，使用效果较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.