Abrégé

A high-thermal-conductivity molten iron trough castable, prepared from the following raw materials in certain parts by weight: fused brown fused alumina, fused dense corundum, special-grade bauxite, silicon carbide, pure calcium aluminate cement, silica powder, bimodal activated alumina powder, spherical asphalt, nano carbon black powder, carbon resin powder, a carbon dispersing agent, an antioxidant, organic fibers, an explosion-proof agent and a high-efficiency water reducing agent. In response to the problem of poor heat-conducting property of traditional castables, the proportion of each basic raw material is scientifically adjusted, the nano carbon black powder, the carbon resin powder and the spherical asphalt are introduced for reasonable grading, and castable is supplemented by the carbon dispersing agent and a composite antioxidant, so that the heat conductivity of the molten iron trough castable is greatly improved. Meanwhile, the finished high-thermal-conductivity molten iron trough castable has good oxidation resistance, high-temperature strength, volume stability and anti-scouring properties. The service life of the molten iron trough may be greatly prolonged in cooperation with a cooling device, and economic benefits and environmental protection benefits of blast furnace iron making are improved.

Classes IPC  ?

• C04B 35/103 - Réfractaires obtenus à partir de mélanges à granulométrie contrôlée contenant des matériaux réfractaires non oxydes, p. ex. du carbone
• C21B 7/14 - Dispositifs de déchargement, p. ex. pour le laitier
• C21B 7/04 - Hauts fourneaux avec des réfractaires particuliers

Abrégé

A water-cooled iron storage type molten iron trough structure, comprising: a working layer (1) in direct contact with a high-temperature mixed molten liquid, and a permanent layer (2) and a steel housing (3) covering outside the working layer (1); the permanent layer (2) is formed by building carbon-containing refractory bricks; and a water cooling device is provided on at a position, corresponding to the trough depth of the molten iron trough, on an outer side wall of the steel housing (3). The water-cooling device is attached on the outer wall of the steel housing (3), and high-aluminum casting materials or high-aluminum bricks used in a permanent layer of a traditional iron storage type molten iron trough are changed into carbon composite brick building having excellent thermal conductivity. Cooling water circularly flowing in the water cooling device takes away abundant heat from the molten iron trough, and keeps the temperature inside the molten iron trough constant, so that destructive effects, such as penetration, abrasion and erosion, caused by slag iron acting on a lining of the molten iron trough are kept within rational ranges; in addition, the water cooling device is mounted on the outer side of the steel housing of the molten iron trough, and even if water leakage occurs, the water still cannot enter the interior of the molten iron trough, thereby ensuring that the molten iron cannot meet water, achieving safe water cooling.

Classes IPC  ?

• C21B 7/14 - Dispositifs de déchargement, p. ex. pour le laitier
• C21B 7/10 - RefroidissementDispositifs à cet effet