Brief Introduction
The ramming mass is an unshaped refractory material that is constructed by ramming and hardened under the action of heating above normal temperature. It is made by mixing refractory aggregate, powder, binder, admixture and water or other liquids with a certain grade. According to the classification of materials, there are high alumina, clay, magnesia, dolomite, zirconium and silicon carbide-carbon refractory ramming materials. 
Technical Datas
| Name | Composition | Application | Note |
| Silica ramming mass | Al2O3: 0.8%, SiO2: 98.5%, Fe2O3: 0.1%, CaO+MgO: 0.2% Thermal conductivity(1000°C): 1.87 0.5% boric acid—-1650°C, 1.0% boric acid—1550°C 1.5 boric acid—-1450°C | Mainly used for working furnace of coreless induction furnace for melting, insulation, cast iron, cast steel. | (mass ratio) |
| Carbon packing material | Metallurgical coke powder(less than 4mm) 80%
Dehydrated coal tar 15% Coal pitch 5% |
The gap between blast furnace base clay brick masonry and furnace shell, blast furnace hearth, the gap between furnace hearth clay brick or high alumina masonry and surrounding cooling wall | Volume ratio |
| Carbon ramming mass | Metallurgical coke powder(less than 4mm) 85%
Dehydrated coal tar 5% Coal pitch 10% |
Blast furnace lining | (mass ratio) |
| Magnesia ramming mass | Magnesia sand (granularity ≤5mm) 85% dehydrated coal tar 15% |
Lateral lifting open hearth furnace bottom | (Volume ratio) |
| Magnesia ramming mass | Magnesia sand 89%~91.5% dehydrated coal tar 7%~9% coal pitch 1.5%~2% |
Electric furnace bottom | (mass ratio) |
| Magnesia ramming mass | Magnesia sand 89% iron oxide powder 2% dehydrated coal tar 9% |
Electric furnace bottom and ramp | Mass ratio |
| Chrome plastic refractory | Chromite 97% binding clay 3% water glass 7% |
Soaking pit hearth central part, burner nozzle surrounding | (mass ratio) |
| Magnesia ramming mass | Magnesia sand 50% clay refractory mortar 30% laterite 5% coke powder 5%Iron oxide powder 10%Brine (for extra addition) |
Soaking pit hearth central part, burner nozzle surrounding | (mass ratio) |
| Chrome oxide ramming mass | Chromite (granularity ≤3mm) 90%
Iron oxide (granularity ≤3mm) 5% |
Circular heating furnace bottom | (volume ratio) chromite ingredient requirement: Cr2O3>35% |
Application
Acidic, neutral and alkaline ramming materials are widely used in coreless intermediate frequency furnaces and cored induction furnaces as intermediate frequency furnace ramming materials to melt gray cast iron, nodular cast iron, malleable cast iron, vermicular graphite cast iron and cast iron alloys , melting carbon steel, alloy steel, high manganese steel, tool steel, heat-resistant steel, stainless steel, melting aluminum and its alloys, melting copper alloys such as copper, brass, white copper and bronze, etc.