试验在ф300×2029毫米和ф250×1959毫米、中间有溢流管连接的双级串联沸腾炉中进行,共处理自然结晶人造光卤石8吨。制得一次脱水光卤石4.5吨。所制得的一次脱水光卤石中含水3%、氧化镁1.5～2.0%。氧化镁44～46%。产品平均粒度组成为:-6.3～+4.0毫米0.77%,-4.0～+2.0毫米7.90%,-2.0～+1.0毫米22.82%,-1.0～+0.63 The test was carried out in a two-stage tandem-type boiling furnace of ф300 × 2029 mm and ф250 × 1959 mm with an overflow pipe in the middle, and a total of 8 tons of natural crystalline man-made carnallite were treated. Preparation of dehydrated carnallite 4.5 tons. The obtained dehydrated carnallite contains 3% water and 1.5-2.0% magnesium oxide. Magnesium oxide 44 ~ 46%. The average particle size of the product was: -6.3 to + 4.0 mm 0.77%, 4.0 to 2.0 mm 7.90%, 2.0 to + 1.0 mm 22.82%, -1.0 to +0.63