1·Andalusite is a polymorph with two other minerals, Kyanite and Sillimanite.
红柱石属多晶型物，含蓝晶石和硅线石两种不同矿物。
2·Sillimanite refractory castable is good in use at combustion zone in CFB boilers.
硅线石耐火浇注料适用于流化床锅炉的燃烧部位。
3·Construction Content: Sillimanite is the raw material of high-class refractory materials and products.
建设内容：硅线石是生产高级耐火材料及制品的原料。
4·The project plans to conduct technical reconstruction to the existing production line so as to reach the original design capacity of annually producing 7000 tons of sillimanite fine powder.
拟对现有的生产线进行技术改造，达到原年产 7000吨硅线石精矿的设计生产能力。