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从保护渣熔融特性出发,研究了有关因素对保护渣形成三层结构的影响。研究结果如下:1.保护渣的熔融温度应低于1250℃。2.测定了七组保护渣在各种配比下的熔融温度。熔融温度除取决于化学组成外,还受渣料颗粒大小的影响。3.助熔剂降低保护渣的熔融温度的影响次序,对于B-4型保护渣为NaF>Na_3AlF_6(冰晶石)>Na_3CO_3>NaCl>CaF_2。4.碳是有效控制保护渣熔融速度的一个因素,对G-2型保护渣而言,其含碳量与熔融速度的关系式为lgt_s=4.160(C％)+1.0334。5.熔融温度在1100～1200℃范围内的各种保护渣,其熔融温度与熔融速度无对应关系。6.渣料的粒度越细,熔融速度就越快,特别在60～100网目之间变化时,这种影响更为显著。7.不同锭型对保护渣熔融速度要求是不同的,经初步研究确定,在实验室1450℃下保护渣熔融速度为4～7吨锭型——30秒左右,<1吨锭型——5秒左右为好。
Based on the melting characteristics of the flux, the influence of the relevant factors on the three-layer structure of the flux was studied. The results are as follows: 1. Molten slag melting temperature should be lower than 1250 ℃. Determination of the melting temperature of seven groups of protective slag in various proportions. In addition to melting temperature depends on the chemical composition, but also affected by the size of the slag particles. 3.Fluxes reduce the order of influence of the melting temperature of the flux, which is NaF> Na_3AlF_6 (cryolite)> Na_3CO_3> NaCl> CaF_2.4 for the flux B-4. Carbon is a factor that effectively controls the flux melting rate, For the G-2 type mold flux, the relationship between the carbon content and the melt rate is lgt_s = 4.160 (C%) + 1.0334.5. Various mold fluxes having a melting temperature in the range of 1100 to 1200 ° C melt There is no correspondence between temperature and melting rate. 6. The smaller the grain size of the slag, the faster the melting rate, especially in the 60 to 100 mesh changes, this effect is more pronounced. 7. Different types of ingot mold flux melting rate requirements are different, after preliminary research to determine, in the laboratory 1450 ℃ mold flux melting rate of 4 to 7 tons ingot - about 30 seconds, <1 ton ingot - 5 seconds or so as well.