10results about "Internal forms" patented technology

The invention relates to a blast furnace bottom flat steel rapid leveling construction method, which comprises the following steps that a plurality of support units are welded on a furnace bottom plate, each support unit comprises a plurality of support angle steels, and the plurality of support angle steels are arranged in a positive and negative staggered manner; the multiple flat steel meshes are installed on the multiple supporting units respectively, each flat steel mesh comprises multiple pieces of flat steel, the multiple pieces of flat steel are sequentially installed on the supporting units, and the length of each piece of flat steel and the distance between every two adjacent supporting angle steel in each supporting unit keep the corresponding modulus; the length of the flat steel and the distance between every two adjacent pieces of supporting angle steel in each supporting unit are set to keep the corresponding modulus, it is ensured that the flat steel connector always falls in the center line area of the supporting angle steel, the area is high in supporting rigidity and uniform in stress, welding misalignment is avoided from the structure root, meanwhile, the vibration resistance of the connector after welding is greatly improved, and the product quality is improved. And the ramming desoldering problem is thoroughly solved.

The present application relates to iron-making technology field, propose a kind of for vanadium-titanium magnetite smelting blast furnace hearth structure and cooling control method, the blast furnace structure includes furnace bottom brick lining, hearth side wall brick lining and be located in the hearth side wall brick lining below furnace base;Furnace bottom brick lining and the outside of the hearth side wall brick lining is provided with smooth cast iron cooling wall, the inside of the furnace base is provided with cooling device;The furnace bottom brick lining is successively provided with heat preservation brick layer and heat-conducting brick layer from hearth bottom to furnace base direction, heat preservation brick layer includes dense clay brick and composite mullite brick, the heat-conducting brick layer is semi-graphite carbon brick;Hearth side wall brick lining is built with the composite mullite brick, and in the corner of hearth and furnace bottom, hearth side wall brick lining extends to form brick lining reinforcing structure in the direction of furnace in.The present application solves the problem of excessive deposition of titanium carbonitride caused by improper temperature gradient when smelting vanadium-titanium magnetite, inhibits the accumulation of hearth center and edge bonding, maintains the hearth active and blast furnace smooth.

The present invention discloses a blast furnace, comprising a hearth, a belly, a waist and a furnace body. A furnace cover is provided on the top of the furnace body, and a first feeding port, a first feeding channel and a second feeding channel are respectively provided on the furnace cover. A slot is provided on the mouth wall of the first feeding port, and a feeding joint is embedded in the slot. A feeding elbow is provided at the lower end of the feeding joint, and the feeding elbow is connected to the discharge hopper. A butt joint is connected to the upper end of the feeding joint, and the butt joint is connected to the feeding hopper. A rotating motor is also provided on the furnace cover, and a rotating shaft of the rotating motor is connected to a gear. A gear ring is provided on the outer wall of the feeding joint, and the gear teeth and the gear ring are meshed with each other. The gear is used to drive the feeding joint to rotate, and at this time, the feeding hopper on the feeding elbow will make a circular motion, so that the iron ore is evenly distributed in the furnace body. While the iron ore is being fed, coke and limestone are regularly added from the first feeding channel and the second feeding channel to ensure that the three raw materials are evenly mixed, which can effectively accelerate the reaction efficiency, shorten the smelting cycle, and effectively improve the production efficiency.

The present application relates to a kind of blast furnace hearth hearth structure, belong to metallurgical industry field.The hearth structure is composed of hearth bottom (4) and hearth side wall (3), the inboard of hearth structure is provided with elephant foot gasket (5), the outside of hearth structure is provided with cooling wall (2) and furnace shell (1), the outside of furnace shell (1) is arranged with several reinforcing rib plates (7) in one circle interval, and the effect of strengthening support is formed to hearth structure.The present application is by the outer wall of hearth structure being set as circular arc, and make cooling wall (2) and furnace shell (1) present concentric circular arc, so that the cooling intensity of cooling wall (2) to hearth structure is greater, more uniform, beneficial to the solidification line (9) of molten iron to hearth structure inside direction shift, form circular arc shape in hearth structure inside and iron layer, effectively weaken or prevent the formation of elephant foot shape erosion, prolong the life of hearth.

The utility model relates to the technical field of blast furnace shell construction, and discloses an auxiliary device for blast furnace shell internal structure construction, which comprises a construction platform arranged in a blast furnace shell, and a plurality of chain blocks connected with the top of the blast furnace shell are arranged on the periphery of the construction platform; the climbing derrick is fixedly arranged in the blast furnace shell along the vertical direction and comprises a cylindrical bracket and a ladder stand in the bracket; one end of the horizontal channel is connected to the climbing derrick, and the other end of the horizontal channel is connected to an iron notch of a blast furnace shell. By means of the auxiliary device for construction of the internal structure of the blast furnace shell, constructors can safely and rapidly enter and exit from the blast furnace shell, and the construction efficiency of the internal structure of the blast furnace shell is improved.

A stave protection system for a metallurgical furnace comprises: a stave (100) comprising a plurality of recesses (110) arranged on a front face (102) of the stave (100); and a plurality of inserts (200) each being received by a respective one of the recesses (110), the inserts (200) so received projecting from the front face (102) of the stave (100) such that, in use, furnace burden material is trapped by the inserts (200) so as to provide a protective layer of the burden material on the front face (102) of the stave (100). Each insert (200) comprises a set of segments (202a-f) and a retainer which forces the segments (202a-f) against a surface (110b) of the respective recess (110), such that the segments (202a-f) are secured in the recess (110) by frictional contact with the surface (110b) of the recess (110).

The invention discloses a blast furnace inner wall wear-resistant coating and a preparation method thereof, and belongs to the technical field of metallurgical equipment protection. The coating is composed of nickel powder, chromium powder, molybdenum powder, niobium powder, boron powder, silicon powder, tungsten carbide powder, two innovative reinforcement phases, core-shell structure tungsten carbide boron nitride nanocapsules, yttrium-chromium-aluminum-nitrogen-oxygen high-entropy nanocrystals and yttrium oxide. The preparation process comprises the following steps: firstly, carrying out sand blasting and cleaning pretreatment on the inner wall of a blast furnace, then uniformly mixing and drying the powder mixture, cladding the powder mixture on the surface of the inner wall under the condition of controlling the temperature of a matrix by adopting a laser cladding technology, and finally, carrying out annealing treatment to obtain the compact coating. According to the method, two uniquely designed compounds are introduced, so that the wear resistance and thermal shock resistance of the coating at high temperature and the bonding strength of the coating and a matrix are remarkably improved, the service life of the inner wall of the blast furnace under harsh working conditions is effectively prolonged, and the key problem that the coating is easy to wear and peel off in the prior art is solved.

The utility model discloses a blast furnace structure for preventing a blast furnace bottom plate from upwarping. The blast furnace structure comprises a furnace bottom sealing plate and a hearth furnace shell, the furnace bottom sealing plate is located at the bottom of the furnace cylinder furnace shell, the furnace cylinder furnace shell is in a straight cylinder shape, and the furnace bottom sealing plate is in arc connection with the furnace cylinder furnace shell; a furnace bottom refractory material is arranged above the furnace bottom sealing plate; the furnace bottom refractory material comprises furnace bottom carbon bricks and two layers of furnace bottom semi-heat-conducting castable poured on the furnace bottom carbon bricks; a side wall refractory material is arranged on the inner side of the hearth shell and above the furnace bottom refractory material; the side wall refractory material comprises a side wall carbon brick, a side wall semi-heat-conducting castable positioned on the inner side of the side wall carbon brick and a high-heat-conducting castable positioned on the outer side of the side wall carbon brick; a side wall ring carbon and a middle sleeve are arranged above the hearth and the furnace shell, buffer layers are laid on the upper surface of the side wall ring carbon and the lower half circle of the middle sleeve, and the problem that the bottom plate of the blast furnace warps upwards can be effectively solved.

The invention relates to a stave (2) for a vertical blast furnace comprising: an inner face (6) configured for contacting an inner surface of the blast furnace wall; and an outer face (8) intended to come into contact with burden inside the blast furnace; wherein the stave comprising a plurality of cavities (4) of a shape that is elongated along a vertical direction (Y) of the blast furnace, corresponding to a direction of burden flow, said cavities being arranged to form ribs (10) extending on the outer face substantially along the vertical direction.

To provide a blast furnace which has productivity equal to or higher than that of a conventional blast furnace, and has reduced influence on the environment.SOLUTION: A blast furnace (1) for iron ore production, wherein iron ore is at least partially reduced by reducing gas blown in a stack of the blast furnace in a blowing zone, wherein the blast furnace (1) comprises an outer wall (2) and an inner wall in contact with material charged into the blast furnace, wherein in the blowing zone the inner wall comprises a local inward widening (6), and wherein reducing gas blowing is performed below the inward widening.SELECTED DRAWING: Figure 3