Patent ID: 8236720

Claim:
An unshaped refractory material having a. a refractory base component and b. a binder component, the binder component comprising, related to the refractory material: b1. an acidic component in the form of at least one weak to moderately weak organic acid selected from the group comprising: citric acid, malic acid, and tartaric acid, in an amount of ≧1.5 wt.-% and ≦6 wt.-%, and b2. a basic component selected from the group comprising: magnesium oxide, caustic MgO, and magnesium hydroxide, in an amount of ≧1 wt.-% and ≦4 wt.-%, and c: which receives an earth-moist, crumbly consistency by addition of 1 to 5 wt.-% of water and which hardens after an exothermic reaction of the binder component.