CN115572173B - Functional material and application thereof in pellet belt roasting machine - Google Patents
Functional material and application thereof in pellet belt roasting machine Download PDFInfo
- Publication number
- CN115572173B CN115572173B CN202211369778.0A CN202211369778A CN115572173B CN 115572173 B CN115572173 B CN 115572173B CN 202211369778 A CN202211369778 A CN 202211369778A CN 115572173 B CN115572173 B CN 115572173B
- Authority
- CN
- China
- Prior art keywords
- roasting machine
- functional
- belt
- pellet
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/50—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare-earth compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62222—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining ceramic coatings
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/22—Sintering; Agglomerating in other sintering apparatus
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3227—Lanthanum oxide or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3229—Cerium oxides or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
- C04B2235/3248—Zirconates or hafnates, e.g. zircon
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Composite Materials (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a functional material and application thereof in a pellet belt roasting machine, belonging to the field of sintered pellets. The preparation method of the functional material comprises the following steps: lanthanum carbonate, samarium carbonate, zirconyl carbonate and cerium carbonate were mixed according to the formula (La x Sm 1‑x ) 2 (Zr y Ce 1‑y ) 2 O 7 Wherein, the stoichiometric ratio of x=0-0.8 and y=0.2-0.8 is uniformly mixed, a cerium-zirconium-lanthanum samarium solid solution is formed at the firing temperature of 1500-1600 ℃, the solid solution is added into the mixed solution of water and a dispersing agent for grinding, and the ground slurry and the adhesive are uniformly mixed according to the proportion of 1 (0.8-1.3), thus obtaining the functional material. Spraying functional materials on the surface of the refractory materials of the pellet belt roasting machine to obtain a functional pellet belt roasting machine; compared with a conventional pellet belt roasting machine, the functional pellet belt roasting machine enhances the wear resistance, corrosion resistance and corrosion resistance of refractory materials, the qualification rate of roasted pellet products is improved by more than 10%, the energy is saved by more than 10% per ton of roasted pellets, and the temperature of the shell of the pellet belt roasting machine is reduced by 10%% or more.
Description
Technical Field
The invention belongs to the field of sintered pellets, and particularly relates to a functional material and application thereof in a pellet belt roasting machine.
Background
The pellet production process comprises three types of shaft furnaces, chain grate machines-rotary kilns and belt roasting machines, the world production process for single-machine large-scale pellets mainly comprises two types of the chain grate machines-rotary kilns and the belt roasting machines, the belt roasting machine pellet method is proposed in 1951, the first industrial belt roasting machine pellet factory in the world is a U.S. Nernst pellet factory which is put into production in 1955, the design capacity is 375 kilot/a, the belt roasting machine occupies a large share from the global perspective, the belt roasting machine is used as third-generation pellet ore process production equipment, rapid development is carried out in China, the steel-covered 110-kilot/a pellet belt roasting machine is put into production in 1973 in 6 months, the first belt roasting machine production line in China lays a foundation and summarizes practical experience for stable and smooth production of extra-large blast furnaces in China, and in addition, the belt roasting machine in China rapidly improves the pellet ore production along with continuous improvement of the design, construction and equipment manufacturing level of the belt roasting machine and application of related scientific research achievements.
With the rapid development of the steel industry in China, the production situation of the pellets of the belt type roasting machine is better than that of a shaft furnace and a chain grate machine-rotary kiln along with the increasing maturity of the technology, the blast drying, the exhaust drying, the preheating, the roasting, the soaking, the primary cooling and the secondary cooling of the pellets of the belt type roasting machine are completed on the same equipment, the advantages of high single-machine yield, low energy consumption, strong adaptability to ore types and the like are achieved, the pellets are preheated and roasted by using hot air and fuel combustion of a cooling section in a preheating section and a roasting section, and the physical sensible heat of high-temperature flue gas of the roasting system is fully recovered by using a fan system, so that the heat consumption of the pellets is reduced by using the waste heat of the process to the greatest extent, the utilization efficiency of the hot air cascade cyclic utilization process of the belt type roasting machine is remarkably improved, and the consumption and the heat dissipation of energy are greatly reduced.
The different parts of the belt type roasting machine have larger difference in requirements on refractory materials, the refractory materials have the characteristics of heat vibration stability, wear resistance, high strength, scour resistance, erosion resistance, no peeling and the like, and the refractory materials in the roasting section can be used for a long time under the working condition of the temperature of more than 1500 ℃; the large flue of the belt roasting machine, the upper cover of the drying section and the upper cover of the cooling section are sprayed by adopting light refractory spray paint, and the light refractory spray paint is required to have certain strength and wear resistance. At present, the refractory material of the belt type roasting machine has higher heat conductivity, lower infrared emissivity and larger energy consumption, and the surface functionality of the refractory material is required to be increased in order to improve the energy utilization rate, so that the heat conductivity is reduced, the infrared emissivity is improved, the functions of wear resistance, corrosion resistance and the like are enhanced, the energy consumption is reduced, and the service life of the belt type roasting machine is prolonged.
Disclosure of Invention
In view of the above, the invention aims to overcome the defects in the prior art, and proposes a functional material and application thereof in a pellet belt roasting machine.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
a preparation method of the functional material comprises the following steps: lanthanum carbonate, samarium carbonate, zirconyl carbonate and cerium carbonate were mixed according to the formula (La x Sm 1-x ) 2 (Zr y Ce 1-y ) 2 O 7 Wherein the stoichiometric ratio of x=0-0.8 and y=0.2-0.8 is uniformly mixed, at the firing temperature of 1500-1600 ℃, the solid solution of cerium-lanthanum samarium zirconate is formed, the solid solution is added into a mixed solution of water and a dispersing agent, wherein the mass ratio of the solid solution to the water is (1.2-2): 1, the adding amount of the dispersing agent is 0.5-1% of the mass of the powder, and the slurry particle size is ground to D by grinding (90) And then uniformly mixing the slurry and the adhesive to obtain the functional material, wherein the thickness of the functional material is less than or equal to 10.0 mu m.
Preferably, the slurry and the binder are mixed in a mass ratio of 1 (0.8-1.3).
Preferably, the high temperature binder is Al (H) with a solid content of 50-60% 2 PO 4 ) 3 A solution.
The invention also provides application of the functional material in a pellet belt roasting machine.
The invention also provides a functional material sprayed on the inner surface of the pellet belt roasting machine, wherein the functional material is the functional material.
Preferably, the functional material is sprayed on the surface of the refractory material of the furnace walls and ceilings and hoods of the belt roasting machine.
Preferably, the spraying thickness of the functional material is 0.1-1mm.
The invention also provides a functional pellet belt roasting machine, wherein the functional materials of any one of claims 1-3 are sprayed on the surfaces of the furnace wall and the furnace top of the functional pellet belt roasting machine and the fireproof material of the furnace cover.
Preferably, the preparation method of the functional pellet ore belt roasting machine comprises the following steps: the furnace wall and the furnace top of the belt roasting machine and the surface of the fire-resistant material of the furnace cover are cleaned of fire clay and dust, functional materials are sprayed on the surface of the fire-resistant material, the spraying thickness is 0.1-1mm, after the drying at room temperature, the temperature is raised according to the drying program of the belt roasting machine, the highest temperature reaches 1500 ℃ and the heat is preserved for 4 hours, so that the functional materials and the fire-resistant materials are combined together, and the functional pellet belt roasting machine is obtained.
Preferably, the temperature of the high temperature area of the functional belt roasting machine is controlled to be 1200-1350 ℃;
preferably, the furnace walls and furnace tops of the functional belt roasting machine comprise furnace walls and furnace tops of a forced air drying section, an induced draft drying section, a preheating section, a roasting section and a soaking section.
Preferably, the functional belt roasting machine furnace cover refers to a large flue, an exhaust drying section upper cover and a secondary cooling section upper cover.
The principle of the invention is as follows:
1)Zr 4+ when the ratio is low, zr 4+ Entering CeO 2 Forming cerium zirconium oxide solid solution with cubic fluorite structure in crystal lattice; ce (Ce) 4+ When the proportion is low, ce 4+ Into ZrO 2 Forming tetragonal cerium-zirconium oxide solid solution in the crystal lattice; la (La) 3+ And Sm 3+ Doped into a cerium zirconium oxide solid solution lattice to generate cerium zirconium acid lanthanum samarium solid solution; regardless of Zr 4+ Entering CeO 2 In the crystal lattice, also Ce 4+ Into ZrO 2 In the crystal lattice, and La 3+ And Sm 3+ The doped cerium zirconium oxide solid solution crystal lattice causes matrix crystal lattice distortion and defects, enhances the mobility of crystal lattice oxygen vacancies, improves the high-temperature thermal stability of the functional material, and leads the functional material to improve the infrared radiation rate and reduce the heat conductivity coefficient;
2) The functional material is tightly combined with the refractory material, and a ceramic glaze is formed, so that corrosion of corrosive gas generated by pellet reaction to the refractory material is isolated, and the ceramic glaze also has the functions of corrosion resistance, wear resistance, thermal barrier and the like;
3) The infrared radiation function of the functional material obviously enhances the radiation heat transfer of the belt roasting machine, improves the uniformity of a temperature field in the furnace, and according to the Stefan-Boltzmann law, the heat transfer of the functional material in the furnace to the pellets is in direct proportion to the square of the absolute temperature of the functional material, and the heating energy of the pellets is obviously enhanced by spraying the functional material;
4) The functional material changes the spectrum distribution of infrared radiation in the furnace, converts the intermittent spectrum into the continuous spectrum, and the emitted far infrared rays directly penetrate into pellets, so that the pellets are internally subjected to molecular oscillation, energy level transition is generated, and infrared rays with a certain wave band are radiated, so that heat is generated, and the inside of the pellets is favorably oxidized completely and the gas is discharged from inside to outside, the strength of the pellets is increased, the bursting of the pellets is reduced, and the yield of the baked pellets is improved;
5) The infrared emissivity of the functional material reaches more than 0.9 from room temperature to the highest temperature, the radiation heat transfer to pellets is enhanced from the forced air drying section to the soaking section, the pellet oxidation reaction time is obviously shortened, and compared with a conventional belt roasting machine with the same model, the production capacity is obviously improved;
6) The surface of the fire-resistant material of the furnace cover is sprayed with functional materials to act: firstly, as a thermal barrier ceramic material, the temperature of the shell of the belt roasting machine is reduced, secondly, as a radiation functional material, the complete combustion of smoke dust particles is promoted, and the content of unburned ashes and dust in smoke is reduced.
The invention has the advantages and effects that:
(1) The invention adopts cerium-zirconium lanthanum samarium solid solution and high-temperature adhesive to form functional material, has excellent stability in high temperature, reduction and oxidation environment, obviously enhances the corrosion resistance, erosion resistance and wear resistance of the belt type roasting machine refractory material, prolongs the service life and solves the difficult problem of neck clamping of the belt type roasting machine;
(2) The functional material is tightly combined with the refractory material on the inner surface of the belt roasting machine, and a ceramic glaze is formed on the surface of the refractory material, so that corrosive gas generated in the pellet ore reaction process is well isolated from the refractory material, corrosion and erosion of the refractory material are avoided, and meanwhile, the wear resistance of the furnace wall is enhanced;
(3) The cerium-lanthanum samarium zirconate belongs to a thermal barrier ceramic material, has a thermal expansion coefficient matched with that of a refractory material, has a lower thermal conductivity coefficient, has a heat insulation function, reduces the shell temperature of a belt type roasting machine, and effectively reduces energy consumption;
(4) The cerium-lanthanum samarium zirconate has high infrared emissivity from room temperature to 1500 ℃, improves the uniformity of a temperature field in a belt roasting machine, promotes the uniform reaction of pellets, and realizes uniform heating of the pellets in a trolley;
(5) The far infrared rays emitted by the functional material can penetrate through particles which are not completely combusted in the smoke dust, heat the interior of the particles and realize complete combustion, so that the content of unburned ashes in the smoke dust is reduced;
(6) The far infrared rays emitted by the functional material directly penetrate into the pellet for heating reaction, so that the complete oxidation of raw materials and the gas discharge in the pellet are facilitated, the strength of the pellet is increased, the bursting of the pellet is reduced, and the rate of finished products of the roasted pellet is improved;
(7) The invention enhances the radiation heat transfer to pellets from the blast drying section to the soaking section, obviously shortens the pellet reaction time, and obviously improves the production capacity compared with the conventional belt roasting machine with the same model;
(8) The functional material of the invention is easily sprayed whether applied to a newly built belt roasting machine or an existing belt roasting machine.
Detailed Description
Unless defined otherwise, technical terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which the inventive concepts pertain. The test reagents used in the following examples, unless otherwise specified, are all conventional biochemical reagents; the experimental methods are conventional methods unless otherwise specified.
The invention will be described in detail with reference to examples.
Example 1
(1) Functional material preparation: uniformly mixing lanthanum carbonate, samarium carbonate, zirconyl carbonate and cerium carbonate according to stoichiometric ratio, and forming Sm at the firing temperature of 1600 DEG C 2 (Zr 0.8 Ce 0.2 ) 2 O 7 Solid solution, 200 parts of solid solution was added to a mixed solution of 100 parts of water and 1.2 parts of dispersant, and the slurry particle size was ground to D by grinding (90) After 10.0 μm, the slurry was transferred to a dispersion tank, and 300 parts of Al (H) having a solid content of 57% was slowly added 2 PO 4 ) 3 Uniformly mixing the solutions to obtain a functional material;
(2) Functional belt roasting machine: removing fire clay and dust from the surfaces of fire-resistant materials of furnace walls and furnace tops of a blast drying section, an induced draft drying section, a preheating section, a roasting section and a soaking section of the belt type roasting machine, as well as surfaces of fire-resistant materials of a large flue, an upper cover of the induced draft drying section and an upper cover of a secondary cooling section, spraying a layer of functional materials on the surfaces of the fire-resistant materials, wherein the spraying thickness is 0.3mm, after the materials are dried at room temperature, heating according to a drying program of the belt type roasting machine, keeping the temperature for 4 hours at the highest temperature of 1500 ℃, and firmly combining the functional materials with the fire-resistant materials to obtain the functional belt type roasting machine;
(3) Roasting pellets: the temperature of a high-temperature area of the functional belt roasting machine is controlled at 1235 ℃, a trolley filled with pellets is put into the belt roasting machine, and the pellets are obtained through a blast drying section, an exhaust drying section, a preheating section, a roasting section, a soaking section, a first cooling section and a second cooling section;
(4) Performance comparative analysis: compared with the conventional belt roasting machine, the functional belt roasting machine obviously enhances the wear resistance, corrosion resistance and corrosion resistance of the refractory material, the qualification rate of the roasted pellet products is improved by 10.2 percent, the energy is saved by 10.3 percent for each ton of roasted pellets, and the shell temperature of the belt roasting machine is reduced by 10.1 percent.
Example 2
(1) Functional material preparation: lanthanum carbonate, samarium carbonate, zirconyl carbonate and cerium carbonate are uniformly mixed according to stoichiometric ratio, and (La) is formed at the firing temperature of 1600 DEG C 0.5 Sm 0.5 ) 2 (Zr 0.5 Ce 0.5 ) 2 O 7 Solid solution, 200 parts of solid solution is addedTo a mixed solution of 100 parts of water and 1.2 parts of a dispersant, the slurry particle size was ground to D by grinding (90) After 10.0 μm, the slurry was transferred to a dispersion tank, and 300 parts of Al (H) having a solid content of 57% was slowly added 2 PO 4 ) 3 Uniformly mixing the solutions to obtain a functional material;
(2) Functional belt roasting machine: removing fire clay and dust from the surfaces of fire-resistant materials of furnace walls and furnace tops of a blast drying section, an induced draft drying section, a preheating section, a roasting section and a soaking section of the belt type roasting machine, as well as surfaces of fire-resistant materials of a large flue, an upper cover of the induced draft drying section and an upper cover of a secondary cooling section, spraying a layer of functional materials on the surfaces of the fire-resistant materials, wherein the spraying thickness is 0.3mm, after the materials are dried at room temperature, heating according to a drying program of the belt type roasting machine, keeping the temperature for 4 hours at the highest temperature of 1500 ℃, and firmly combining the functional materials with the fire-resistant materials to obtain the functional belt type roasting machine;
(3) Roasting pellets: the temperature of a high-temperature area of the functional belt roasting machine is controlled at 1255 ℃, a trolley filled with pellets is put into the belt roasting machine, and the pellets are obtained through a blast drying section, an exhaust drying section, a preheating section, a roasting section, a soaking section, a first cooling section and a second cooling section;
(4) Performance comparative analysis: compared with the conventional belt roasting machine, the functional belt roasting machine obviously enhances the wear resistance, corrosion resistance and corrosion resistance of the refractory material, the qualification rate of the roasted pellet products is improved by 11.5 percent, the energy is saved by 12.2 percent for each ton of roasted pellets, and the shell temperature of the belt roasting machine is reduced by 11.3 percent.
Example 3
(1) Functional material preparation: mixing lanthanum carbonate, samarium carbonate, zirconyl carbonate and cerium carbonate according to stoichiometric ratio, and forming (La) at 1500 deg.C 0.8 Sm 0.2 ) 2 (Zr 0.2 Ce 0.8 ) 2 O 7 Solid solution, 200 parts of solid solution was added to a mixed solution of 130 parts of water and 1.4 parts of dispersant, and the slurry particle size was ground to D by grinding (90) After 10.0 μm, the slurry was transferred to a dispersion tank, and 330 parts of Al (H) having a solid content of 57% was slowly added 2 PO 4 ) 3 The solution is uniformly mixed to obtain the functionA material;
(2) Functional belt roasting machine: removing fire clay and dust from the surfaces of fire-resistant materials of furnace walls and furnace tops of a blast drying section, an induced draft drying section, a preheating section, a roasting section and a soaking section of the belt type roasting machine, as well as surfaces of fire-resistant materials of a large flue, an upper cover of the induced draft drying section and an upper cover of a secondary cooling section, spraying a layer of functional materials on the surfaces of the fire-resistant materials, wherein the spraying thickness is 0.3mm, after the materials are dried at room temperature, heating according to a drying program of the belt type roasting machine, keeping the temperature for 4 hours at the highest temperature of 1500 ℃, and firmly combining the functional materials with the fire-resistant materials to obtain the functional belt type roasting machine;
(3) Roasting pellets: the temperature of a high-temperature area of the functional belt roasting machine is controlled at 1275 ℃, a trolley filled with pellets is put into the belt roasting machine, and the roasted pellets are obtained through a blast drying section, an exhaust drying section, a preheating section, a roasting section, a soaking section, a first cooling section and a second cooling section;
(4) Performance comparative analysis: compared with the conventional belt roasting machine, the functional belt roasting machine obviously enhances the wear resistance, corrosion resistance and corrosion resistance of the refractory material, the qualification rate of the roasted pellet products is improved by 10.8 percent, the energy is saved by 11.6 percent per ton of roasted pellets, and the shell temperature of the belt roasting machine is reduced by 10.9 percent.
Comparative example 1
(1) Functional material preparation: uniformly mixing lanthanum carbonate, samarium carbonate, zirconyl carbonate and cerium carbonate according to stoichiometric ratio, and forming Sm at 1300 ℃ of firing temperature 2 (Zr 0.8 Ce 0.2 ) 2 O 7 Solid solution, 200 parts of solid solution was added to a mixed solution of 100 parts of water and 1.2 parts of dispersant, and the slurry particle size was ground to D by grinding (90) After 10.0 μm, the slurry was transferred to a dispersion tank, and 300 parts of Al (H) having a solid content of 57% was slowly added 2 PO 4 ) 3 Uniformly mixing the solutions to obtain a functional material;
(2) Functional belt roasting machine: removing fire clay and dust from the surfaces of fire-resistant materials of furnace walls and furnace tops of a blast drying section, an induced draft drying section, a preheating section, a roasting section and a soaking section of the belt type roasting machine, as well as surfaces of fire-resistant materials of a large flue, an upper cover of the induced draft drying section and an upper cover of a secondary cooling section, spraying a layer of functional materials on the surfaces of the fire-resistant materials, wherein the spraying thickness is 0.3mm, after the materials are dried at room temperature, heating according to a drying program of the belt type roasting machine, keeping the temperature for 4 hours at the highest temperature of 1500 ℃, and firmly combining the functional materials with the fire-resistant materials to obtain the functional belt type roasting machine;
(3) Roasting pellets: the temperature of a high-temperature area of the functional belt roasting machine is controlled at 1255 ℃, a trolley filled with pellets is put into the belt roasting machine, and the pellets are obtained through a blast drying section, an exhaust drying section, a preheating section, a roasting section, a soaking section, a first cooling section and a second cooling section;
(4) Performance comparative analysis: compared with the conventional belt roasting machine, the functional belt roasting machine obviously enhances the wear resistance, corrosion resistance and corrosion resistance of the refractory material, improves the qualification rate of roasted pellet products by 4.5 percent, saves energy by 6.7 percent per ton of roasted pellets, and reduces the shell temperature of the belt roasting machine by 4.5 percent.
Comparative example 2
(1) Functional material preparation: lanthanum carbonate, samarium carbonate, zirconyl carbonate and cerium carbonate are uniformly mixed according to stoichiometric ratio, and (La) is formed at the firing temperature of 1600 DEG C 0.5 Sm 0.5 ) 2 (Zr 0.5 Ce 0.5 ) 2 O 7 Solid solution, 200 parts of solid solution was added to a mixed solution of 100 parts of water and 1.2 parts of dispersant, and the slurry particle size was ground to D by grinding (90) After 10.0 μm, the slurry was transferred to a dispersion tank, and 200 parts of Al (H) having a solid content of 57% was slowly added 2 PO 4 ) 3 Uniformly mixing the solutions to obtain a functional material;
(2) Functional belt roasting machine: removing fire clay and dust from the surfaces of fire-resistant materials of furnace walls and furnace tops of a blast drying section, an induced draft drying section, a preheating section, a roasting section and a soaking section of the belt type roasting machine, as well as surfaces of fire-resistant materials of a large flue, an upper cover of the induced draft drying section and an upper cover of a secondary cooling section, spraying a layer of functional materials on the surfaces of the fire-resistant materials, wherein the spraying thickness is 0.3mm, after the materials are dried at room temperature, heating according to a drying program of the belt type roasting machine, keeping the temperature for 4 hours at the highest temperature of 1500 ℃, and firmly combining the functional materials with the fire-resistant materials to obtain the functional belt type roasting machine;
(3) Roasting pellets: the temperature of a high-temperature area of the functional belt roasting machine is controlled at 1255 ℃, a trolley filled with pellets is put into the belt roasting machine, and the pellets are obtained through a blast drying section, an exhaust drying section, a preheating section, a roasting section, a soaking section, a first cooling section and a second cooling section;
(4) Performance comparative analysis: compared with the conventional belt roasting machine, the functional belt roasting machine obviously enhances the wear resistance, corrosion resistance and corrosion resistance of the refractory material, improves the qualification rate of roasted pellet products by 2.2%, saves energy by 4.3% per ton of roasted pellets, and reduces the shell temperature of the belt roasting machine by 3.8%.
Comparative example 3
(1) Functional material preparation: mixing lanthanum carbonate, samarium carbonate, zirconyl carbonate and cerium carbonate according to stoichiometric ratio, and forming (La) at 1500 deg.C 0.8 Sm 0.2 ) 2 (Zr 0.2 Ce 0.8 ) 2 O 7 Solid solution, 200 parts of solid solution was added to a mixed solution of 230 parts of water and 1.4 parts of dispersant, and the slurry particle size was ground to D by grinding (90) After 10.0 μm, the slurry was transferred to a dispersion tank, and 330 parts of Al (H) having a solid content of 57% was slowly added 2 PO 4 ) 3 Uniformly mixing the solutions to obtain a functional material;
(2) Functional belt roasting machine: removing fire clay and dust from the surfaces of fire-resistant materials of furnace walls and furnace tops of a blast drying section, an induced draft drying section, a preheating section, a roasting section and a soaking section of the belt type roasting machine, as well as surfaces of fire-resistant materials of a large flue, an upper cover of the induced draft drying section and an upper cover of a secondary cooling section, spraying a layer of functional materials on the surfaces of the fire-resistant materials, wherein the spraying thickness is 0.3mm, after the materials are dried at room temperature, heating according to a drying program of the belt type roasting machine, keeping the temperature for 4 hours at the highest temperature of 1500 ℃, and firmly combining the functional materials with the fire-resistant materials to obtain the functional belt type roasting machine;
(3) Roasting pellets: the temperature of a high-temperature area of the functional belt roasting machine is controlled at 1275 ℃, a trolley filled with pellets is put into the belt roasting machine, and the roasted pellets are obtained through a blast drying section, an exhaust drying section, a preheating section, a roasting section, a soaking section, a first cooling section and a second cooling section;
(4) Performance comparative analysis: compared with the conventional belt roasting machine, the functional belt roasting machine obviously enhances the wear resistance, corrosion resistance and corrosion resistance of the refractory material, improves the qualification rate of roasted pellet products by 7.2%, saves energy sources by 5.6% per ton of roasted pellets, and reduces the shell temperature of the belt roasting machine by 5.3%.
The ratios of the raw materials and the performance comparisons of examples 1 to 3 and comparative examples 1 to 3 are shown in tables 1 and 2.
TABLE 1 raw material ratios and performance comparisons of examples 1-3
Table 2 comparison of the raw material ratios and Property of comparative examples 1 to 3
Compared with the conventional belt roasting machine, the functional belt roasting machine obviously enhances the wear resistance, erosion and corrosion resistance of the refractory material, the qualification rate of the roasted pellet products and the energy-saving rate of the roasted pellets per ton are improved by more than 10%, and the shell temperature of the belt roasting machine is reduced by more than 10%. In the comparative example 1, the calcination of the powder is incomplete after the calcination temperature of the powder is reduced, so that the qualification rate of the calcined pellet products, the energy saving rate of each ton of calcined pellets and the reduction rate of the shell temperature of the belt type roasting machine are reduced; the coating cracking phenomenon occurs after the addition amount of the binder in the comparative example 2 is reduced, so that the qualification rate of the baked pellet products, the energy saving rate of each ton of baked pellets and the reduction rate of the shell temperature of the belt type roasting machine are reduced; the increased amount of water in comparative example 3 resulted in a reduced coating density, which resulted in a reduced qualification rate of the fired pellets, a reduced energy saving per ton of fired pellets, and a reduced temperature reduction rate of the belt calciner housing.
The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A functional pellet ore belt roasting machine is characterized in that:
the preparation method of the functional pellet ore belt roasting machine comprises the following steps: removing fire clay and dust from the surfaces of the furnace wall and the furnace roof of the belt type roasting machine and the fire-resistant material surface of the furnace cover, spraying functional materials on the surface of the fire-resistant material, drying at room temperature, heating according to a drying program of the belt type roasting machine, and keeping the temperature at the highest temperature of 1500 ℃ for 4h so that the functional materials and the fire-resistant material are combined together to obtain the functional pellet belt type roasting machine; the temperature of the high temperature area of the functional belt roasting machine is controlled to be 1200-1350 ℃;
the preparation method of the functional material comprises the following steps: lanthanum carbonate, samarium carbonate, zirconyl carbonate and cerium carbonate were mixed according to the formula (La x Sm x1- ) 2 (Zr y Ce y1- ) 2 O 7 Whereinx =0-0.8, y The stoichiometric ratio of 0.2-0.8 is uniformly mixed, at the firing temperature of 1500-1600 deg.C, the solid solution of cerium-zirconium lanthanum samarium is formed, the solid solution is added into the mixed solution of water and dispersing agent, in which the mass ratio of solid solution and water is (1.2-2): 1, the adding quantity of dispersing agent is 0.5% -1% of powder mass, and the slurry grain size is ground to D by grinding （90） Less than or equal to 10.0 mu m, and then uniformly mixing the slurry and the adhesive to obtain a functional material; the slurry and the adhesive are mixed according to the mass ratio of 1 (0.8-1.3); the binder is Al (H) with the solid content of 50-60 percent 2 PO 4 ) 3 A solution.
2. The functional pellet belt calciner of claim 1, wherein: the spraying thickness of the functional material is 0.1-1mm.
3. The functional pellet belt calciner of claim 1, wherein: the furnace wall and the furnace top of the belt roasting machine comprise furnace walls and furnace tops of a blast drying section, an induced draft drying section, a preheating section, a roasting section and a soaking section.
4. The functional pellet belt calciner of claim 1, wherein: the furnace cover of the belt type roasting machine refers to a large flue, an upper cover of an air draft drying section and an upper cover of a secondary cooling section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211369778.0A CN115572173B (en) | 2022-11-03 | 2022-11-03 | Functional material and application thereof in pellet belt roasting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211369778.0A CN115572173B (en) | 2022-11-03 | 2022-11-03 | Functional material and application thereof in pellet belt roasting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115572173A CN115572173A (en) | 2023-01-06 |
| CN115572173B true CN115572173B (en) | 2023-10-13 |
Family
ID=84588445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211369778.0A Active CN115572173B (en) | 2022-11-03 | 2022-11-03 | Functional material and application thereof in pellet belt roasting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115572173B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006045072A1 (en) * | 2005-09-21 | 2007-03-22 | Schott Ag | Refractive, defractive, or transmittiv optical element, made of poly-crystalline optoceramic, transparent for visible light and infrared radiation |
| CN101407336A (en) * | 2008-06-30 | 2009-04-15 | 中国科学院上海硅酸盐研究所 | Method for preparing lanthanum zirconate powder |
| CN102351545A (en) * | 2011-04-07 | 2012-02-15 | 世林（漯河）冶金设备有限公司 | High temperature heat barrier material, coating, molded product and application thereof |
| CN216282696U (en) * | 2021-10-29 | 2022-04-12 | 中泽吉铁新材料科技有限公司 | Tunnel type roasting furnace |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6924040B2 (en) * | 1996-12-12 | 2005-08-02 | United Technologies Corporation | Thermal barrier coating systems and materials |
| US6413578B1 (en) * | 2000-10-12 | 2002-07-02 | General Electric Company | Method for repairing a thermal barrier coating and repaired coating formed thereby |
| CN109534814B (en) * | 2018-12-29 | 2020-06-09 | 昆明理工大学 | Zirconium oxide/titanium oxide/cerium oxide doped rare earth tantalum/niobate (RETa/NbO)4) Ceramic powder and preparation method thereof |
| US20200340100A1 (en) * | 2019-04-23 | 2020-10-29 | United Technologies Corporation | Thermal barrier coating with reduced stabilizer content |
| CN110484854B (en) * | 2019-07-22 | 2021-04-23 | 中国航发北京航空材料研究院 | Preparation method of thermal barrier coating with self-repairing and temperature-sensitive functions |
-
2022
- 2022-11-03 CN CN202211369778.0A patent/CN115572173B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006045072A1 (en) * | 2005-09-21 | 2007-03-22 | Schott Ag | Refractive, defractive, or transmittiv optical element, made of poly-crystalline optoceramic, transparent for visible light and infrared radiation |
| CN101407336A (en) * | 2008-06-30 | 2009-04-15 | 中国科学院上海硅酸盐研究所 | Method for preparing lanthanum zirconate powder |
| CN102351545A (en) * | 2011-04-07 | 2012-02-15 | 世林（漯河）冶金设备有限公司 | High temperature heat barrier material, coating, molded product and application thereof |
| CN216282696U (en) * | 2021-10-29 | 2022-04-12 | 中泽吉铁新材料科技有限公司 | Tunnel type roasting furnace |
Non-Patent Citations (2)
| Title |
|---|
| 纳米锆酸镧团聚体特性及等离子涂层性能的研究;赵晓东;谢建刚;曾克里;于月光;;有色金属(冶炼部分)(第S1期);全文 * |
| 黄书珍等.La3+，Ce4+共掺杂Sm2Zr207陶瓷的热物理性能.《稀有金属材料与工程》.2011,第600-603页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115572173A (en) | 2023-01-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102815951B (en) | Flame-resistant corrosion-resistant coating | |
| CN107892581B (en) | High-strength corrosion-resistant zirconia corundum honeycomb ceramic body and preparation method thereof | |
| CN115259902B (en) | High-temperature stable green rare earth infrared radiation coating and preparation method and application thereof | |
| CN105698524B (en) | Heat accumulating type multistage heating rotary kiln device | |
| CN102924066B (en) | Siliceous composite plate, and preparation method and application thereof | |
| CN108083765B (en) | Low-heat-conduction anti-stripping brick and preparation method thereof | |
| CN110642539A (en) | Double-chamber lime kiln | |
| CN115710436B (en) | Method for improving heat barrier radiation and heat storage radiation effects of refractory materials in coke oven | |
| CN109574639A (en) | High thermal shock resistance corundum-mullite brick and preparation method thereof | |
| CN115572173B (en) | Functional material and application thereof in pellet belt roasting machine | |
| CN101029736A (en) | Fired-coal furnace and its additive | |
| CN113028827A (en) | Operation method of spodumene calcination conversion device | |
| CN211111740U (en) | Double-chamber lime kiln | |
| CN103553373A (en) | Annular sleeve kiln | |
| CN115231580B (en) | Method for preparing forsterite and magnesia by sintering fine-particle magnesite flotation tailings | |
| CN203530147U (en) | Annular sleeve kiln | |
| CN111302673A (en) | High-temperature magnesium oxide calcining device and calcining method thereof | |
| CN214792497U (en) | Spodumene calcining and converting device | |
| CN211339311U (en) | High-temperature magnesium oxide calcining device | |
| CN101497523A (en) | Method for producing light heat-insulating brick by biomass energy and light heat-insulating brick thereof | |
| CN100344568C (en) | Cement clinker sintering technology and its equipment | |
| CN101429593B (en) | Dezincification process for zinc-containing mash gas mud | |
| CN111807725A (en) | Calcination process of dolomite sand | |
| CN115557526B (en) | Energy-saving method for cerium oxide tunnel kiln | |
| CN115654926A (en) | Method for reducing natural gas consumption by firing lanthanum cerium oxide in shuttle kiln |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |