Welcome to HengHeng Trade Co., Ltd in Tangshan. We are an international trading company who are specialized in exporting refractory and thermal insulating materials to foreign countries. We can supply you kinds of high grade Refractory Materials mainly used in coke oven plant. Please find as followings: 1. Silica bricks and silica mortar 2. Fireclay bricks and fireclay mortar. 3. Thermal insulation bricks as request.