FIELD: process engineering.
SUBSTANCE: invention relates to foundry. Proposed mix comprises the following components, wt %: orthophosphoric acid - 18-30, saw dust - 2-10, coal ash, flue dust of thermal electric power station with fusibility of at least 1300°C and total content of Na2O, K2O, CaO not exceeding 5% that makes the rest. Discard head of mould inside is lined by aforesaid heat-insulation mix, mix layer thickness making 0.2 to 0.25 of discard head diametre.
EFFECT: high heat-insulation properties that ensures higher yield of suitable metal and savings of liquid metal.
3 dwg, 4 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| HEAT INSULATING SAND FOR MAKING CASTING AND INGOT HEADS | 0 |
|
SU1364387A1 |
| HEAT-INSULATING COMPOSITION FOR INGOT AND CASTING HEADS | 0 |
|
SU1196113A1 |
| HEAT-INSULATION MIXTURE FOR WARMTH KEEPING OF CASTING HOT TOP | 1995 |
|
RU2093306C1 |
| HEAT INSULATION MIXTURE FOR PROTECTION AND HEAT INSULATION OF METAL IN INTERMEDIATE AND STEEL CASTING LADLES AT STEEL CONTINUOUS CASTING | 2005 |
|
RU2308350C2 |
| MIXTURE FOR PRODUCING EXOTHERMIC INSERT | 0 |
|
SU1764807A1 |
| METHOD FOR MANUFACTURING MOLD HOT TOP | 1996 |
|
RU2108893C1 |
| HEAT INSULATION COMPOSITION FOR WARMING HEADS OF CASTINGS | 2006 |
|
RU2296646C1 |
| METHOD OF PRODUCING EXOTHERMAL AND INSULATION GATE SYSTEM INSERT | 2012 |
|
RU2492960C1 |
| MIX FOR THERMAL INSULATING SHELLS | 0 |
|
SU1166886A1 |
| COMPOSITION FOR PREPARING HEAT-INSULATING MATERIAL | 2000 |
|
RU2165908C1 |
