Raw vermiculite after high temperature roasting, the volume can be rapidly expanded several times to dozens of times, volume expansion after expansion vermiculite vermiculite is called. Expanded vermiculite series of products: product category has golden silver white vermiculite, vermiculite; a variety of vermiculite, vermiculite, horticultural vermiculite, expanded vermiculite mixture. The main models are:1-3mm,2-4mm,10-20,20-40,40-60,80-120head 100 head,150 head,200 order,325order, specifications can be according to the requirements of production.