Refractory binder system
A refractory formulation containing an anhydrous solvent, an oleophilic rheology modifier and a refractory aggregate exhibits non-thermoplastic behavior, and remains plastic and formable at temperatures in the range of 10 degrees Celsius to 180 degrees Celsius. The oleophilic rheology modifier may effectively bind with the solvent to create a gel-like structure with organic solvents with moderate to high polarity. A phyllosilicate clay that has been treated with a quaternary fatty acid amine may be used as the oleophilic rheology modifier.
1. A refractory aggregate system, comprising:
a refractory aggregate;
an anhydrous liquid;
an oleophilic rheology modifier; and
a carbon binder selected from the group consisting of coal tar, coal tar pitches, petroleum tar, petroleum tar pitches, phenolic resins, and combinations thereof;
wherein the anhydrous liquid is selected from the group consisting of tall oil, propylene glycol, linseed oil, soybean oil, and combinations thereof.
2. The system of claim 1 , wherein the anhydrous liquid is present in the formulation in an amount in the range from and including 2 wt % to and including 40 wt % as a percentage of the total batch of liquids and solids.
3. The system of claim 1 , wherein the anhydrous liquid exhibits a change in viscosity that is less than a factor of 10 in response to a temperature change from 10 degrees C. to 100 degrees C.
4. The system of claim 1 , wherein the oleophilic rheology modifier is present in the formulation in an amount in the range from and including 0.2 wt % to and including 50 wt % as a percentage of the total batch of liquids and solids.
5. The system of claim 1 , wherein the oleophilic rheology modifier is selected from the group consisting of organoclays, phyllosilicates, smectities, hectorite, montmorillonite, and combinations thereof.
6. The system of claim 1 , wherein the oleophilic rheology modifier comprises organoclay.
7. The system of claim 1 , wherein the anhydrous liquid comprises propylene glycol.
8. The system of claim 1 , wherein the carbon binder comprises phenolic resins.
9. The system of claim 1 , wherein the refractory aggregate is selected from the group consisting of brown fused alumina, bauxite, clay, silica sand, silica, fumed silica, silicon carbide, and combinations thereof.
10. The system of claim 1 , wherein the refractory aggregate is present in the wet formulation in an amount in the range from and including 5 wt % to and including 90%.
11. The system of claim 1 , wherein the weight ratio of oleophilic rheology modifier to anhydrous liquid is equal to or between a ratio of 1 part modifier to 50 parts liquid and 1 part modifier to one part liquid.
12. The system of claim 1 , wherein the carbon binder comprises phenolic resins, and further comprises coke.
13. The system of claim 12 , wherein the carbon binder is present in the wet formulation in an amount ranging from and including 0.01 wt % to and including 20 wt %.
14. The system of claim 1 , further comprising a metal-containing substance selected from the group consisting of aluminum, silicon, ferrosilicon, ferrosilicon nitride, titanium dioxide, and combinations thereof.
15. The system of claim 14 , wherein the metal-containing substance is present in the wet formulation in an amount in the range from and including 0.01 wt % to and including 10 wt %.
16. The system of claim 1 , further comprising fumed silica.
17. The system of claim 16 , wherein the fumed silica is present in the wet formulation in an amount in the range from and including 0.01 wt % to and including 10 wt %.