13results about "Monolithic linings" patented technology

The application discloses a construction method for prolonging the service life of a large titanium slag smelting furnace, and belongs to the technical field of smelting production equipment maintenance and repair processes. The method is convenient to operate, can effectively guarantee the repair quality, and can effectively prolong the service life of the electric furnace by 3-5 years. The method comprises the following steps: discharging molten iron, slag and a dead iron layer with a specified thickness before stopping power supply and furnace, reinforcing the furnace body, removing a sealing steel platform on an upper furnace shell and corresponding auxiliary dust removal pipelines, protectively removing the furnace shell, furnace wall lining and furnace bottom lining that need to be replaced, manufacturing a new furnace shell, sequentially assembling and welding the new furnace shell, protectively recovering the furnace bottom lining and the furnace wall lining, finally recovering the sealing steel platform around the upper furnace shell and the auxiliary dust removal pipelines, and performing the normal metallurgical production after furnace baking, preheating and slag hanging, so that the repair work of prolonging the service life of the titanium slag smelting furnace is completed.

The utility model discloses a medium frequency furnace furnace lining structure relates to medium frequency furnace technical field. This medium frequency furnace furnace lining structure, medium frequency furnace furnace lining structure, including at least two groups of firebrick furnace lining, refractory layer and reinforcing structure, firebrick furnace lining is by brick block one, brick block three and at least one group's brick block two, and the refractory layer sets up on two groups of firebrick furnace lining, and the refractory layer is by brick block four, brick block six and at least one group's brick block five, and the reinforcing structure sets up between two groups of firebrick furnace lining. This medium frequency furnace furnace lining structure can divide furnace lining structure into multiple parts, and the different thermal stress, mechanical stress and chemical corrosion degree that furnace lining different parts bear are carried out the maintenance and the maintenance of differentiation, avoid the furnace lining upper part condition to be good, only because the lower part serious erosion is whole replacement entire furnace lining, effectively reduced the use cost, and when dismounting, because multiple firebrick furnace linings have the gap, only need to dismount refractory layer and can operate by sawing reinforcing structure.

The present invention provides a castable material for a firing furnace, which is capable of eliminating the need for a drying step after casting, and of suppressing alkali attack and physical impacts from furnace contents. The castable material according to the present invention comprises: a refractory raw material mixture containing: 75% by mass or more in total of one or more selected from the group consisting of an alumina raw material, an alumina-silica raw material, and a silicon carbide raw material; and 1% by mass to 15% by mass of silica flour, with a remainder in which a content rate of a CaO component derived from alumina cement is 0.5% by mass or less (including zero); and colloidal silica added to the refractory raw material mixture at an addition rate of 0.5% by mass to 5% by mass in terms of an SiO2 component thereof.

This utility model discloses a furnace lining structure, comprising a heat storage outer lining, a refractory brick lining, and an inner lining. The refractory brick lining is located between and fixedly connected to the heat storage outer lining and the inner lining. The heat storage outer lining includes a stearic acid lining, a bentonite nanocomposite lining, and a frustum-shaped connecting portion. The top of the frustum-shaped connecting portion is connected to the stearic acid lining and the bentonite nanocomposite lining, and the bentonite nanocomposite lining is fitted inside the stearic acid lining. By setting the heat storage outer lining to include a stearic acid lining, a bentonite nanocomposite lining, and a frustum-shaped connecting portion, with the top of the frustum-shaped connecting portion connected to the stearic acid lining and the bentonite nanocomposite lining, and the bentonite nanocomposite lining fitted inside the stearic acid lining, this utility model ensures the heat storage density and stability of the entire white corundum smelting furnace, reduces heat loss during heat storage, and lowers energy consumption.

The present application belongs to the technical field of rotary kiln, more particularly, it relates to a rotary kiln refractory brick lining structure, and also relates to a rotary kiln refractory brick lining structure forming method. A plurality of refractory bricks form an annular refractory brick lining, the refractory brick lining comprises a lining body (1) and a sealing area (2), the side surface (3) of the refractory brick is in a trapezoidal structure, the upper width b (4) of the refractory brick is smaller than the lower width a (5), the refractory brick comprises a basic refractory brick (6) and a sealing refractory brick (7), the sealing refractory brick (7) comprises a plurality of groups, the upper width b (4) of the plurality of groups of sealing refractory bricks (7) decreases successively, and the lower width a (5) of the plurality of groups of sealing refractory bricks (7) decreases successively. The rotary kiln refractory brick lining structure can simplify the brick type arrangement, only arrange the brick type of the sealing area, reduce the construction process difficulty, guarantee the construction process quality, and improve the construction efficiency.

The present invention relates to a method for repairing a refractory wall (2) of a furnace (1) by replacing at least one wall section (3) thereof, the method comprising: (a) demolishing the wall section (3); (b) installing in situ an outer form (4) defining a new wall section (3) and installing an inner form (5) defining a new flue in the new wall section (3); (c) casting a castable refractory material in the volume defined by the outer form (4) and the inner form (5) and allowing the material to harden; (d) removing the outer form; the invention also relates to a wall section for a furnace and to the furnace.

The application provides a lime kiln body lining structure and a kiln body lining construction method, and belongs to the technical field of lime kilns, which solves the technical problem that the existing lime kiln cannot stir the materials. The lime kiln body lining structure comprises a kiln inner cylinder, connecting rings fixed at both ends of the kiln inner cylinder, a kiln outer cylinder fixed between the two connecting rings and sleeving the kiln inner cylinder, a plurality of movable aluminum bricks slidingly connected in the kiln inner cylinder, a plurality of stirring seats rotationally connected in the kiln inner cylinder, a movable annular frame rotationally arranged between the kiln inner cylinder and the kiln outer cylinder, two ends of the movable annular frame rotationally connected with the corresponding connecting rings, a plurality of inner conical gear rings fixed on the inner surface of the connecting rings, and a driving assembly one connected in the kiln inner cylinder. The application has the advantages of stirring the materials and cooling the kiln body during the stirring process, thereby prolonging the service life of the kiln body.

This invention discloses a zirconia hollow sphere ultra-high temperature furnace lining material and its preparation method, belonging to the technical field of ultra-high temperature ceramic materials. The preparation method of the zirconia hollow sphere ultra-high temperature furnace lining material is as follows: 85-95 parts of zirconia powder, 5-25 parts of alumina powder, and 3-5 parts of yttrium oxide powder are melted and blown in a three-phase electric arc furnace to obtain zirconia hollow sphere aggregate; 60-75 parts of zirconia hollow sphere aggregate, 4-18 parts of zirconia powder, 12-30 parts of alumina powder, and 2-5 parts of binder are mixed evenly, pressed, and sintered to obtain the zirconia hollow sphere lining material. This invention obtains the zirconia hollow sphere lining material through raw material melting and blowing, pressing, and sintering; the lining material has the characteristics of high strength, good creep resistance, good thermal shock stability, and high fracture toughness; the preparation method has a short process and high efficiency, which is conducive to large-scale industrial production and promotion.

This utility model discloses a refractory lining structure for a solar molten salt furnace that resists rapid thermal changes, belonging to the technical field of molten salt furnace linings. It includes multiple metal fixing rods, the outer ends of which are fixedly connected to the inner wall of the molten salt furnace. The inner side of each metal fixing rod is provided with a wear-resistant casting layer, the inner side of which is provided with a steel fiber casting layer, and the inner side of which is provided with a refractory brick layer composed of several refractory bricks spliced ​​together. This utility model uses the thin end of the metal fixing rod to insert into a channel, creating tension on the refractory bricks, effectively preventing them from falling off. The refractory coating reduces thermal stress concentration, making the heating of the lining more uniform and improving the thermal shock resistance of the molten salt furnace lining. The molten salt furnace lining structure of this utility model greatly improves the thermal shock resistance of the molten salt furnace lining.

The invention refers to a refractory lining disposed on the bottom of a metallurgical unit for holding a molten metal, a method of providing a refractory lining disposed on the bottom of a metallurgical unit for holding a molten metal, and a metallurgical unit for holding a molten metal.