The granite fire board, the five lotus fire board, fire board, fire board manufacturers in Shandong Province Wulian County street the town Yeonsan stone factory specializing in processing: five lotus Wulian red, the Wulian gray, piedmont gray, green sandstone, purple rock etc. granite stone, stone products factory compact structure, polycrystalline, stone hardness, acid and alkali, high temperature resistant, good color, sun and rain resistance, durable. The five Lotus Wulian red mineral composition and physical properties: a: a small amount of K-feldspar, plagioclase, quartz, hornblende biotite. Second: the chemical composition of SiO2-68.28% AIO3-14.81% Fe2 O3-1.78% CaO -2.19% MgO - 1.30% K2O -4.95% Na2O - 3.62% three physical properties: average compressive strength of 1400-2400Kg / cm2 average flexural strength :130-140 Kg / cm2 abrasion resistance: 0.6 g / cm2 Water absorption: 0.36% Acid rate: 96.5% alkali rate: 98.42% Hardness: Mohs 7.4 Specific Gravity: 2.65g/cm3. Manager: Bi both military 13606330510