湖北宜都金科高岭土有限公司

湖北宜都金科高岭土有限公司

精铸莫来石型砂粉的技术数据

   GPC产品铝组分含量高，铁组分含量低，膨胀系数小，耐火度高，热化学稳定性好。以其制备型壳，湿强度、高温强度、溃散性等指标均达理想要求。浇注的铸件，易脱壳、不变形、不易缩尺。光洁度好，成品率高。

产品适用碳素钢、不锈钢、耐热钢等的复杂精密铸件，也适用于铝合金、钛合金的熔模铸造。

规格与性能

粒度（砂品）              16-30目                         30-60目等

粒度分布（16-30目%）目：+16    16~30    30~40         -40

                                 %：0.5         77        21.5            1

粒度（粉品）           200目              270目             325目

耐火度                                                                                   ≥1790℃

体积密度                                                      ≥2.5

灼减                                                          ≤0.25%

莫来石相                                                      56～65%

水分                                                          ≤0.3%

砂中含粉量                                                    ≤0.3%

硬度（摩氏）                                                   7～8

PH                                                             6～8

化学分析

A1203                                                         45～46%

Si02                                                          52～53%

Fe203                                                        ≤0.74%

Ti02                                                         ≤0.6%                                                                                                                            

K20                                                            0.2%

Na20                                                           0.2%

Ca0                                                            0.3%

Mg0                                                            0.3%