CHEMICAL BINDERS Chemical binders are applied in refractory bodies to reduce or even replace hydraulic binding agents. These alternative binders allow a compaction of refractory ramming mixes. After drying, these ramming mixes can be heated faster than hydraulically bonded bodies.
Chemical binders are applied in refractory bodies to reduce or even replace hydraulic binding agents. These alternative binders allow a compaction of refractory ramming mixes. After drying, these ramming mixes can be heated faster than hydraulically bonded bodies.
Wetting agents permit the introduction and dispersion of hydrophobic raw materials in refractory bodies (e.g. soot and graphite). Wetting agents are surface-active preparations exhibiting high surface affinity, which in turn decreases the surface tension of the preparation water.
On account of their swelling capacity, plasticisers increase the plasticity of non-plastic raw materials, which makes it possible to avoid the addition of clay as a plasticiser. Thus, the resistance to temperature variations and the hot strength of refractory pressing, ramming and extrusion bodies can be improved.
The use of splinter porosity-inducing agents serves to adjust the pore size, pore volume and pore distribution in a targeted manner. A typical example of application is the manufacture of abrasive tools. Fibrous porosity-inducing agents are employed to reduce cracks and shrinkage and to permit faster de-watering.
