CN115254509B - Reinforcing steel bar production line with corrosion-resistant layer and preparation method of corrosion-resistant layer - Google Patents

Reinforcing steel bar production line with corrosion-resistant layer and preparation method of corrosion-resistant layer Download PDF

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CN115254509B
CN115254509B CN202210927891.XA CN202210927891A CN115254509B CN 115254509 B CN115254509 B CN 115254509B CN 202210927891 A CN202210927891 A CN 202210927891A CN 115254509 B CN115254509 B CN 115254509B
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unit
steel bar
slurry
aluminizing
ceramic
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CN115254509A (en
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左峰
王焕景
寇胜宇
王伟华
庄振伟
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Henan Dingding Industrial Co ltd
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Henan Dingding Industrial Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00—Spray booths
    • B05B16/20—Arrangements for spraying in combination with other operations, e.g. drying; Arrangements enabling a combination of spraying operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0278—Arrangement or mounting of spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
    • B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
    • B05D3/0413—Heating with air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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    • 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
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Abstract

A steel bar production line with a corrosion-resistant layer and a preparation method of the corrosion-resistant layer belong to the field of steel bar manufacture. The production line is provided with an aluminizing unit and a heating module thereof or/and a peripheral ceramic processing unit and a heating module thereof, and then is provided with a cleaning device, the aluminizing unit or/and the peripheral ceramic processing unit are provided with a plurality of heating modules, the temperature of the heating module of the aluminizing unit or/and the peripheral ceramic processing unit is 850 ℃, the aluminizing unit or/and the peripheral ceramic processing unit is connected with a circulating conveying pipeline of the configured aluminizing slurry or/and ceramic slurry in a spraying treatment mode or/and a dipping treatment mode, and the aluminizing unit or/and the peripheral ceramic processing unit is internally connected with a ceramic layer sprayed to the inside of the steel bar, so that the high chloride resistance of the steel bar can be improved, the steel bar and concrete loosening can be prevented, the service life of the reinforced concrete can be prolonged, and the quality of offshore engineering can be ensured.

Description

Reinforcing steel bar production line with corrosion-resistant layer and preparation method of corrosion-resistant layer
Technical Field
The invention relates to a steel bar production line, in particular to a steel bar production line with a corrosion-resistant layer and a preparation method of the corrosion-resistant layer, and belongs to the field of steel bar manufacturing.
Background
The production process of the common cold-rolled ribbed steel bar is mature, mainly comprises the procedures of uncoiling, descaling, cold-rolling forming, heat treatment, coiling and the like, and can be further divided into a uncoiling unit, a rolling unit, a heat treatment unit and a coiling unit.
In the heat treatment process of the traditional cold rolled steel bar, a high-frequency or medium-frequency heating mode is adopted, which is already a mature technology, in the ribbed steel bar short-circuit heat treatment equipment with the application number of 2022104088938 and a heating power supply thereof, the equipment for heating the steel bar by using the short-circuit and a power supply structure thereof are disclosed, the short-circuit heating mode is a heating mode of 380V mains supply, rectification, inversion, a tank (inductor) and a rolled piece, the electric heating efficiency can reach more than 90 percent, compared with the traditional medium-frequency or high-frequency heating mode, the heat efficiency can be improved by more than 30 percent, the electricity consumption cost is greatly reduced, the energy consumption is saved, in addition, the current short-circuit heating equipment is changed into a standard configuration in a manufacturer, the power of each module is 250KW, the equipment installation length is 4m, the width is 1.2m, and the cooling water consumption is 10-12 cubes, and the production cost can be greatly reduced by using the heating mode for carrying out the heat treatment of the ribbed steel bar. Referring to fig. 7, fig. 7 is a schematic structural diagram of an existing short-circuit heating module, wherein two groups of short-circuit heating modules, namely, a first 40a and a second 40b heating module, are provided, one group of which is a positive electrode of a heating power source connected to a pair of steel bar guiding rollers in a positive electrode group 43a, the other group of steel bar guiding rollers 43a are connected with a negative electrode of the heating power source, each group of steel bar guiding rollers comprises an upper roller 41a and a lower roller 41b which rotate around a first 44a and a second 44b rotating shaft, the ribbed steel bar 10 moves between the upper roller 41a and the lower roller 41b along the length direction of the ribbed steel bar, wherein the upper roller 41a is arranged above the ribbed steel bar 10, the steel bar guiding roller group connected with the positive electrode and the steel bar guiding roller group connected with the negative electrode are respectively arranged at different positions in the moving direction of the ribbed steel bar 10, one side of the first 44b and the second 44b rotating shafts are respectively fixedly provided with respective drums 42, each carbon brush drum 42 is internally provided with respective, the end of each carbon brush is respectively connected with the upper roller 44a and the second 44b rotating shaft as an axis, the upper roller and the lower roller 41b rotating with the same electrode of the heating power source, and the upper roller 41b is connected with the upper roller 41b and the lower roller 41b rotating with the same electrode of the heating power source through the same polarity, and the upper roller 41b is connected with the upper roller 41b and the lower roller 41b heating roller, and the upper roller 41b is connected with the upper roller 41b heating roller.
The present invention is a heat treatment device for cold rolled steel bar, and is provided in CN201822149397.7, and the present intermediate frequency or high frequency heating module in fig. 8 is a schematic structural diagram, the high frequency or intermediate frequency heat treatment module 50 is formed by a plurality of spiral intermediate frequency or high frequency induction heating coils 52 disposed on a stand 51, a heat insulation cover 53 is disposed on the periphery of the hollow shaft, a guiding roller device is disposed between the plurality of high frequency or intermediate frequency modules 50, specifically, the guiding roller device includes an upper guiding roller 56, a lower guiding roller 57a and a lower guiding roller 57b,59 are a plurality of guiding roller brackets, roller shafts of the guiding roller are hollow shafts, a cooling medium flows in the hollow shafts, wherein the intermediate frequency or high frequency induction heating coils 52 generate an intermediate frequency or high frequency power supply by using an intermediate frequency or high frequency generator 54, and are connected with the high frequency or intermediate frequency module induction heating coils 52 via a wire 55, the hollow shafts of the lower guiding roller 57b are communicated by a cooling tube 58a, the first guiding roller 56 and the hollow shaft of the lower guiding roller 57a are communicated by a cooling tube 58b, the first cooling tube 58a and the second cooling tube 58b are a soft tube, and a pressure-proof water flowing loop is formed.
The ribbed ceramic steel bars are mainly used in the foundation construction fields of buildings, bridges, tunnels, roads, ports and wharfs, and the like, along with the continuous development of highways and high-speed railways, the highways and the high-speed railways are mainly built on an overhead bridge, particularly the use amount of the high-speed railway steel bars is increased along with the continuous development of the high-speed highways and the high-speed railways, and in addition, because the high-speed railways are direct-current traction, in order to avoid vortex generation of high-speed trains in the running process, avoid stray current from influencing the running of the trains and increase the transmission distance of direct-current circuits, ballastless track steel bars need to adopt certain insulation measures. In order to avoid vortex, insulating sleeves are required to be arranged on the upper and lower longitudinal steel bars at the longitudinal and transverse cross positions in a penetrating way, and the insulating sleeves are required to be arranged in all the steel bars in a penetrating way, so that a great amount of manpower and material resources are required to be spent, the penetrating efficiency is low, the displacement is easy, and a certain difficulty is brought to production.
In recent years, the development of highways and high-speed railways to the sea is increasing, and engineering highways and high-speed railways such as cross-sea bridges, submarine tunnels and the like are increasing, because marine water quality contains substances such as high chloride salt and the like, if general reinforced concrete is used, the substances react with the surface of the reinforcing steel bars due to the transmission of chloride ions in the seawater environment, so that the surface layers of the reinforcing steel bars are corroded prematurely to expand, the stress of the substances can cause the loosening and expansion of the surrounding reinforced concrete structures, the strength of the concrete around the reinforcing steel bars is seriously influenced, the service life of offshore buildings is reduced after a long time, and the design life of engineering cannot be ensured.
How to prevent the Gao Tietong from generating vortex at the crossing of the longitudinal and transverse reinforcing steel bars, how to improve the erosion characteristics of the reinforcing steel bars for resisting high chlorine salt and other liquids, delay the penetration of seawater into concrete, prevent the corrosion of the reinforcing steel bars, protect the strength of the reinforced concrete and improve the quality of ocean engineering is a great subject faced in the current offshore engineering contacted with seawater.
Disclosure of Invention
Aiming at the practical problems that when Gao Tietong is out of date, vortex is easy to generate between crisscross steel bars, corrosion of seawater in offshore projects to the steel bars in reinforced concrete leads to the reduction of concrete strength, the invention provides a steel bar production line with a corrosion-resistant layer and a preparation method of the corrosion-resistant layer, and aims to form an insulating ceramic layer and a seawater corrosion-resistant protective layer by spraying ceramic to the inner part of the steel bars, prevent high-speed rail running from being influenced, improve the high-chlorine salt resistance of the steel bars, prevent chemical reaction with the surface of the steel bars caused by chloride ion and the like, generate expansion stress, cause phenomena of loosening of concrete and the like, prolong the service life of the reinforced concrete in seawater and ensure the quality of offshore projects.
The technical scheme of the invention is as follows: the steel bar production line with the corrosion-resistant layer comprises a paying-off unit, a rolling unit, a heat treatment unit and a wire collecting unit which are arranged along the transmission direction of the steel bar with the rib, wherein an aluminizing unit and a heating module thereof or/and a peripheral ceramic treatment unit and a heating module thereof are arranged in front of or behind the heat treatment unit, one or more roller transmission devices are arranged on the aluminizing unit or/and the peripheral ceramic treatment unit, the roller transmission devices transmit the steel bar with the rib to the rear of the production line, the heating temperature of the heating module of the aluminizing unit or/and the peripheral ceramic treatment unit is 700-900 ℃, the aluminizing unit or/and the peripheral ceramic treatment unit is/are connected with a circulating conveying pipeline provided with aluminizing slurry or/and ceramic slurry in a spraying treatment mode or/and a dipping treatment mode, the circulating conveying pipeline is provided with a compression pump, and the tail ends of the aluminizing unit or/and the peripheral ceramic treatment unit are provided with cleaning devices;
the aluminizing unit and the peripheral ceramic treatment unit are aluminizing units or peripheral ceramic treatment units in a spraying treatment mode, each aluminizing unit or the peripheral ceramic treatment unit comprises a liquid collecting tank arranged below a reinforcing steel bar, a collecting pipeline is arranged below each liquid collecting tank, a spraying device which rotates along the periphery of the reinforcing steel bar is arranged above each liquid collecting tank, the spraying device is rotatably arranged on a bracket, a driving device drives the spraying device to rotate, each spraying device comprises end plates which are arranged at two ends, the periphery of one end plate is meshed with a driving gear to rotate through a toothed ring, a connecting rod between the end plates, an end hole is formed in the middle of each end plate, a hollow rotary joint is fixed at the outer side of each end plate end hole, the hollow rotary joint is positioned at the rotary axis of each end plate, the reinforcing steel bars are transmitted in the positions of through holes of the end plates, a plurality of connecting rods which are parallel to the reinforcing steel bars are arranged on the periphery of the opposite pair of end plates, each connecting rod is a slurry spray pipe, and one side of each slurry spray pipe is communicated with the end plate;
When the aluminizing unit is in a spraying treatment mode, two closed spraying devices are arranged, an activator slurry is connected to the front closed spraying device, a mixed slurry supply pipe for supplying an aluminum agent, a diluent and a loosening agent is connected to the rear closed spraying device, a residual activator slurry recovery tank and a residual activator slurry recovery branch pipe are respectively arranged between the front closed spraying device and the rear closed spraying device, an activator collecting tank and a collecting pipeline thereof and a mixed slurry collecting tank and a collecting pipeline thereof are respectively arranged below the two closed spraying devices, the residual activator slurry recovery branch pipe is communicated with the activator slurry collecting pipeline, a lyophobic device with ribs is arranged above the residual activator slurry recovery tank, the lyophobic device is a downward blowing hot air machine, the residual activator slurry recovery branch pipe is arranged below the lyophobic device, the slurry in the activator slurry collecting pipeline and the mixed slurry collecting pipeline is detected and re-proportioned and then returns to a circulating conveying pipeline, and when the peripheral ceramic treatment unit adopts the spraying treatment mode, the closed spraying device is adopted;
further, an aluminizing unit and an outer ceramic treatment unit are arranged in front of or behind the heat treatment unit, two short-circuit heating modules and a plurality of high-frequency or medium-frequency heating modules are respectively arranged in the aluminizing unit and the outer ceramic treatment unit, and in a production line provided with the aluminizing unit and the outer ceramic treatment unit, the first two short-circuit heating modules and the plurality of high-frequency or medium-frequency heating modules are used for the aluminizing unit in a spraying treatment mode or an impregnating treatment mode, and the second two heating modules and the plurality of high-frequency or medium-frequency heating modules are used for the outer ceramic treatment unit in the spraying treatment mode or the impregnating treatment mode;
Furthermore, the heating mode in the aluminizing unit or the peripheral ceramic processing unit is a short-circuit heating module, an intermediate-frequency or high-frequency heating module, the aluminizing unit uses two spraying devices, and the peripheral ceramic processing unit uses one spraying device;
further, the aluminizing unit and the peripheral ceramic treatment unit are in an impregnation treatment mode, a heating mode adopted by the aluminizing unit or the peripheral ceramic treatment unit in the impregnation treatment mode is a short-circuit heating module, an intermediate-frequency or high-frequency heating module, the aluminizing unit or the peripheral ceramic treatment unit comprises a steel bar impregnation tank, an impregnation liquid supply pipe and an impregnation liquid return pipe are respectively arranged at the two ends of the upper edge of the steel bar impregnation tank, the steel bar impregnation tank is a plastic tank or a metal tank with an insulating lining, a plurality of wear-resistant insulating rollers are arranged at the inner bottom of the steel bar impregnation tank, the steel bar is impregnated in liquid in the steel bar impregnation tank through a plurality of insulating guide rollers in the moving process, the aluminizing unit uses two steel bar impregnation tanks, and the peripheral ceramic treatment unit uses one steel bar impregnation tank;
further, the cleaning device is a closed spraying device, a plurality of spraying heads are arranged above the steel bars, the spraying liquid comprises one or more solutions of 20-30% of aluminum fluoride, sodium fluoride and sodium chloride, the balance is water, the temperature of the steel bars in the closed spraying device is 400-550 ℃, a steam calandria is arranged at the upper end of the closed spraying device, a collecting pipeline is arranged at the lower end of the closed spraying device, and the spraying liquid is utilized after being filtered, detected and re-proportioned;
Further, the aluminizing unit and the peripheral ceramic processing unit are in an impregnation treatment mode, the heating mode adopted by the aluminizing unit or the peripheral ceramic processing unit in the impregnation treatment mode is a short-circuit heating module, an intermediate-frequency or high-frequency heating module, the aluminizing unit or the peripheral ceramic processing unit in the impregnation treatment mode comprises a steel bar impregnation tank, impregnation liquid supply pipes and impregnation liquid collecting pipelines are respectively arranged at the two ends of the upper edge of the steel bar impregnation tank, the steel bar impregnation tank is a plastic tank or a metal tank with an insulating lining, a plurality of abrasion-resistant insulating rollers are arranged at the bottom of the steel bar impregnation tank, the steel bar is impregnated in liquid in the steel bar impregnation tank through a plurality of insulating guide rollers in the moving process, the aluminizing unit uses two steel bar impregnation tanks, and the peripheral ceramic processing unit uses one steel bar impregnation tank.
According to the steel bar preparation method with the corrosion-resistant layer, the corrosion-resistant layer is an aluminizing layer in the steel bar and/or a ceramic layer on the periphery of the steel bar, the corrosion-resistant layer is formed by arranging an aluminizing unit and a heating module thereof or/and a peripheral ceramic processing unit and a heating module thereof in the production line before or after the heat processing unit, the aluminizing unit adopts aluminizing slurry which comprises aluminizing agent sizing material and activator slurry, the activator slurry accounts for 4-10% of the aluminizing slurry, the activator is independently supplied to ribbed steel bars before the aluminizing agent and the diluent, the aluminizing agent comprises an aluminizing agent, a loosening agent and a diluent, the aluminizing agent comprises 20-30% of the aluminizing agent, 40-60% of the diluent and 20-35% of the loosening agent, wherein the aluminizing agent comprises 30-55% of aluminum powder, 15-15% of secondary aluminum ash, 2-5% of ammonium chloride and 2-5% of potassium fluoride; the diluent is mainly water, phenolic resin is externally added, and the ratio of water to water-soluble phenolic resin is 100:2; the activator is a mixed liquid of 1/10000 concentration of potassium chloride, 2/10000 concentration of potassium permanganate, 1.5/10000 concentration of sodium nitrite and the balance of water; the loosening agent is one or more of sodium bicarbonate, ammonium bicarbonate and bauxite, the aluminizing agent sizing material and the activating agent sizing material are respectively mixed in proportion, and then are supplied to an aluminizing unit along a circulating conveying pipeline for aluminizing treatment, the heating temperature of the steel bar is 700-850 ℃, and the steel bar is sprayed or immersed while being conveyed to form an aluminizing layer in the surface layer of the steel bar.
According to the steel bar preparation method with the corrosion-resistant layer, the steel bar production line is utilized, the corrosion-resistant layer is an aluminized layer inside the steel bar and/or a ceramic layer on the periphery of the steel bar, the corrosion-resistant layer is formed by arranging an aluminized unit and a heating module thereof or/and a peripheral ceramic processing unit and a heating module thereof in the production line before or after the heat processing unit, the ceramic processing unit utilizes ceramic slurry, and the parts of the ceramic slurry are as follows: 30-40 parts of boron carbide, 20-35 parts of silicon carbide, 10-20 parts of aluminum oxide, 5-8 parts of potassium feldspar, 3-7 parts of zirconium oxide and 0.3-0.6 part of graphene, wherein the purity of various raw materials in the ceramic slurry is above 98%, primary mixed powder with the particle size of 20-50nm is used as raw materials in the ceramic slurry, the mixed powder is diluted into slurry by water and phenolic resin, the slurry is conveyed into a steel bar dipping tank in a peripheral ceramic treatment unit by using a circulating conveying pipeline to carry out ceramic treatment on the periphery of a steel bar, an air stirrer is arranged at the bottom of the steel bar dipping tank, the slurry is kept in a uniform state, and the steel bar is conveyed while being sprayed or dipped under the heating condition, so that a ceramic layer is formed on the periphery of the steel bar.
By additionally arranging the aluminizing unit and/or the outer ceramic treatment unit in the production line of the cold-rolled steel bar, the corrosion-resistant layer of the steel bar can be added on the inner layer or the periphery of the steel bar, thereby being beneficial to use in seawater, being capable of slowing down the chronic corrosion of the seawater to the reinforced concrete, particularly to the steel bar, prolonging the service life of the steel bar and even the concrete in the seawater, improving the corrosion resistance of the offshore or submarine concrete, particularly the ceramic layer with insulating property, and being capable of ensuring smooth passing of high-speed rail; the roller transmission device is arranged on the aluminizing unit or/and the peripheral ceramic processing unit, so that the transmission force after the production line is prolonged can be further increased on the basis of the original ribbed steel bar transmission device; according to the method, an aluminizing unit or/and a peripheral ceramic unit are added in a production line, after the aluminizing process is carried out, active aluminum atoms which are generated by thermal decomposition and penetrate into metal elements are adsorbed on the surface of the ribbed steel bar, then the active aluminum atoms are diffused into the surface layer of the steel bar at a certain temperature, so that the chemical composition, the structure and the performance of the surface layer of the steel bar are changed, compared with the original steel bar, the atomic radius of the penetrating metal elements is large, gaps of original steel bar atoms are filled, and a compound or passivation film formed after aluminizing has high-temperature oxidation resistance and seawater corrosion resistance and is suitable for different environments; after the ceramic process treatment of the peripheral ceramic unit, a layer of hydrophobic smooth ceramic can be formed on the surface of the steel bar, and after the spraying of liquid such as aluminum fluoride, sodium fluoride and sodium chloride, the slurry on the surface can be cleaned, the surface can be coarsened, and the bonding with concrete is facilitated; the slurry is filtered, detected and reconfigured during circulation conveying through the circulation conveying pipeline connected with the slurry in the aluminizing unit or/and the peripheral ceramic processing unit, and the slurry is reused in the aluminizing unit or/and the peripheral ceramic processing unit, so that resources can be saved and the environment can be protected; the aluminizing unit and the peripheral ceramic treatment unit are respectively provided with a heating module, so that the aluminizing inside the steel bar and the peripheral ceramic treatment of the steel bar can be realized according to the temperature environment formed by the aluminizing and the ceramic, and the peripheral ceramic of the steel bar with the anti-corrosion function can ensure that vortex is not generated when high-speed rail passes through; by adopting a spraying treatment mode in the aluminizing unit and the peripheral ceramic treatment unit, aluminizing or ceramic slurry can be sprayed on the surface of the ribbed steel bar under the heating condition, an aluminizing layer or ceramic surface layer can be formed on the surface layer or the periphery of the ribbed steel bar, and metal atoms permeated in the aluminizing slurry can be continuously permeated in the heat treatment process of the steel bar, so that the depth of the aluminizing layer is increased; the spray device is used, a spray nozzle can be arranged on a slurry spray pipe connected between end plates of the spray device, aluminum-impregnated and ceramic slurry can be sprayed to the periphery of the ribbed steel bar while rotating around the axis of the hollow rotary joint, and particularly, by arranging two spray devices, mixed slurry of an activating agent slurry, an aluminum-impregnated agent, a diluent and a loosening agent is respectively sent to the two spray devices, and the surface of the steel bar can be activated in the former spray device, and then the mixed slurry is sprayed to the steel bar in the latter spray device, so that the absorption of the aluminum-impregnated slurry is facilitated; the front and rear spraying devices or the mixed slurry dipping tanks are provided with the residual activator recycling tanks and the residual activator recycling branch pipes, so that the activator slurry at the periphery of the reinforcing steel bar is blown off and dried by using an air heater, and the mixed slurry of the aluminum donor, the diluent and the relaxer is absorbed and bonded; by using a plastic tank or a steel bar dipping tank with an insulating lining, the short circuit formed by the communication of electricity on the steel bar and a metal tank can be prevented, and the safety is more beneficial to improvement particularly under the condition of utilizing a short circuit heating module; the invention discloses a method for manufacturing a reinforced concrete, which comprises the steps of arranging a plurality of wear-resistant insulating rollers at the bottom of a reinforced steel dipping tank, dipping the reinforced steel in liquid in the reinforced steel dipping tank through a plurality of insulating guide rollers in the moving process, bonding ceramic slurry on the periphery of the reinforced steel in the reinforced steel dipping tank, guiding a transmission route of the reinforced steel, preventing the reinforced steel from bending, knotting and the like in the reinforced steel dipping tank, damaging normal transmission of the ribbed reinforced steel, ensuring normal aluminizing or forming a ceramic surface layer, coating ceramic on the inside of the reinforced steel by utilizing the invention, forming an insulating ceramic layer and a seawater corrosion-resistant protective layer, preventing high-speed rail running from being influenced, improving the seawater corrosion-resistant protective layer of the reinforced steel, preventing chemical reaction with the surface of the reinforced steel from being caused by transmission of chloride ions and the like, generating expansion stress, causing phenomena of concrete loosening and the like, and ensuring the quality of offshore engineering.
Drawings
Fig. 1 is a block diagram of an additional aluminizing unit and peripheral ceramic processing unit between a rolling unit and a heat treatment unit.
Fig. 2 is a block diagram of an additional aluminizing unit between a rolling unit and a heat treatment unit.
Fig. 3 is a block diagram of an additional aluminizing unit between a rolling unit and a heat treatment unit.
Fig. 4 is a schematic diagram of the structure of an aluminizing unit in a spray coating treatment mode.
Fig. 5 is a schematic end view of the spray coating device.
FIG. 6 is a schematic diagram of the structure of an aluminized unit in the dipping treatment mode.
Fig. 7 is a schematic structural diagram of a conventional short-circuit heating module.
Fig. 8 is a schematic structural diagram of a conventional medium-frequency or high-frequency heating module.
Description of the reference numerals: 10-rebar, 10 a-activator collection tank, 10 b-mixed slurry collection tank, 11 a-front end plate, 11 b-rear end plate, 12-slurry spray pipe, 13-nozzle, 14-hollow rotary joint, 14 a-through hole, 15-slurry inlet, 16-power gear, 17-drive motor, 18-toothed ring, 19-return pipe, 20-spraying device, 21-hot air blower, 22-residual activator slurry recovery manifold, 23-steam hood, 24-exhaust pipe, 30 a-activator slurry impregnation tank, 30 b-mixed slurry impregnation tank, 31-impregnation liquid, 32-abrasion-resistant insulating roller, 33-residual activator slurry recovery tank, 34-activator slurry collection pipe, 35-valve, 36-charging pipe, 37-mixed slurry collection pipe, 38-air agitator, 40 a-short circuit heating module one, 40b heating module two, 41 a-upper roller, 41 b-lower roller, 42-self-carbon brush, 43 a-positive electrode group 43 b-negative electrode group, 44 a-rotating shaft two, 50-high frequency or intermediate frequency module, 51-base, 52-heating coil, 53-heat preservation cover, 54-intermediate frequency or high frequency generator, 55-wire, 56-upper guide roller, 57 a-lower guide roller I, 57 b-lower guide roller II, 58 a-cooling tube I, 58 b-cooling tube II, 59-guide roller bracket.
Detailed Description
The following describes the technical scheme of the present invention in detail with reference to the accompanying drawings.
The technical scheme of the invention is as follows: fig. 1 is a block diagram of a cold rolled ribbed bar 10 resistant to high chloride corrosion, in which an aluminizing unit and a peripheral ceramic treating unit are added between a rolling unit and a heat treating unit, fig. 2 is a block diagram of an aluminizing unit between a rolling unit and a heat treating unit, fig. 3 is a block diagram of an aluminizing unit between a rolling unit and a heat treating unit, and in fig. 1 to 3, a black body part is a part added in an original production line.
The ribbed steel bar 10 production line comprises a paying-off unit, a rolling unit, a heat treatment unit and a wire collecting unit which are arranged along the transmission direction of the ribbed steel bar 10, wherein an aluminizing unit and a heating module thereof or/and a peripheral ceramic treatment unit and a heating module thereof are arranged in front of the heat treatment unit or behind the heat treatment unit, one or more roller transmission devices are arranged on the aluminizing unit or/and the peripheral ceramic treatment unit, the ribbed steel bar 10 is transmitted to the rear of the production line by the roller transmission devices, the temperature of the heating module of the aluminizing unit or/and the peripheral ceramic treatment unit is 700-900 ℃, the aluminizing unit or/and the peripheral ceramic treatment unit utilizes a spraying treatment mode or/and an immersion treatment mode, a circulating conveying pipeline of the configured aluminized slurry or/and ceramic slurry is connected in the aluminizing unit or/and the peripheral ceramic treatment unit, a compression pump is arranged on the circulating conveying pipeline, and the tail ends of the aluminizing unit or/and the peripheral ceramic treatment unit are all provided with cleaning devices.
Referring to fig. 7 and 8, an aluminizing unit and an outer ceramic processing unit are disposed in front of the heat treatment unit, two short-circuit heating modules and a plurality of high-frequency or intermediate-frequency heating modules are respectively disposed in the aluminizing unit and the outer ceramic processing unit, one of the two short-circuit heating modules is an anode, the other short-circuit is a cathode, the first two short-circuit heating modules and the plurality of high-frequency or intermediate-frequency heating modules are used for the aluminizing unit in a spraying treatment mode or an impregnating treatment mode in a production line of the aluminizing unit and the outer ceramic processing unit in a spraying treatment mode or an impregnating treatment mode, and the second two heating modules and the plurality of high-frequency or intermediate-frequency heating modules are used for the outer ceramic processing unit in a spraying treatment mode or an impregnating treatment mode.
Fig. 4 is a schematic diagram of the structure of an aluminizing unit in a spraying manner, fig. 5 is a schematic diagram of the end face structure of a spraying device, the aluminizing unit and the peripheral ceramic processing unit are in a spraying manner, the heating manner in the aluminizing unit or the peripheral ceramic processing unit in the spraying manner is a short-circuit heating module, an intermediate frequency heating module or a high-frequency heating module, the aluminizing unit or the peripheral ceramic processing unit in the spraying manner comprises a liquid collecting tank arranged below a reinforcing steel bar 10, two spraying devices 20 are arranged in the aluminizing unit, the spraying devices 20 are rotatably arranged on a bracket, a driving device drives the spraying devices 20 to rotate, a power gear 16 arranged on an output shaft of a driving motor 17 is meshed with a toothed ring 18 fixed on the periphery of an end plate, two spraying devices 20 are arranged in the aluminizing unit and are respectively an activator spraying device 20 and a mixed slurry spraying device 20, slurry enters the fixed end of the hollow rotary joint 14 from the slurry inlet 15, the fixed end is rotationally connected with a rotary end, an inner hole communicated with the slurry spray pipe 12 is arranged in the rotary end, a steel bar 10 is penetrated in the through hole 14a, the through hole 14a is made of wear-resistant alloy, the slurry enters the end plate through the rotary end of the hollow rotary joint 14 or is directly connected with the slurry spray pipe 12, a liquid collecting tank I10 a and a liquid collecting tank I10 b are respectively arranged below the activator spray device 20 and the mixed slurry spray device 20, a return pipe 19 is respectively arranged below the activator collecting tank 10a and the mixed slurry collecting tank 10b, a spray device 20 which rotates along the periphery of the steel bar 10 is respectively arranged above the liquid collecting tank I10 a and the liquid collecting tank I10 b, the spray device 20 comprises end plates arranged at two ends, the periphery of the end plates is meshed with a power gear 16 through a toothed ring 18, a connecting rod (namely, a slurry spray pipe 12) is arranged between the front end plate 11a and the rear end plate 11b, a through hole and a connecting screw hole of the slurry spray pipe 12 are arranged on the end face of the end plate, the rotating end of a hollow rotating joint 14 is fixed on the outer side of the end plate, the hollow rotating joint 14 is positioned at the rotating axle center of the end plate, the steel bars 10 are transmitted in the position of the through hole 14a of the hollow rotating joint 14, a plurality of connecting rods parallel to the steel bars 10 are arranged on the periphery of the opposite pair of end plates, the connecting rods are the slurry spray pipe 12, a plurality of spray nozzles 13 are arranged on the slurry spray pipe 12, one side of the slurry spray pipe 12 is communicated with the end plate, two spraying devices 20 are used for an aluminizing unit, and one spraying device 20 is used for a peripheral ceramic processing unit.
The cleaning device is a closed spraying device, a plurality of spray heads are arranged above the steel bars 10, the spray liquid comprises one or more solutions of 20-30% of aluminum fluoride, sodium fluoride and sodium chloride, the balance is water, the temperature of the steel bars 10 in the closed spraying device is 400-550 ℃, steam discharge pipes are arranged at the upper end of the closed spraying device, collecting pipelines are arranged at the lower end of the closed spraying device, and the spray liquid is reused after being filtered, detected and proportioned.
Referring to fig. 4 and 5, when the aluminizing unit is a spray coating method, two spray coating devices are provided, an activator slurry supply pipe is connected to the front spray coating device, a mixed slurry supply pipe for supplying an aluminum agent, a diluent and a loosening agent is connected to the rear spray coating device, 15 is a slurry inlet, an activator slurry collecting tank 10a, a collecting pipe thereof, a mixed slurry collecting tank 10b and a collecting pipe thereof are respectively arranged below the front spray coating device and the rear spray coating device, a residual activator slurry recovery tank 33 and a residual activator slurry recovery branch pipe 22 thereof are arranged between the front spray coating device and the rear spray coating device, a liquid dredging device with ribs is arranged above the residual activator slurry recovery tank 33, the liquid dredging device adopts a downward blowing hot air blower 21, the residual activator slurry recovery branch pipe 22 is communicated with the activator slurry collecting pipe 34, a valve 35 is arranged in the activator slurry collecting pipe 34 and the mixed slurry collecting pipe 37, the slurries in the activator slurry collecting pipe 34 and the mixed slurry collecting pipe 37 are all detected and re-proportioned, and then returned to the circulation conveying pipe 10a and the mixed slurry collecting tank 23 through the circulation conveying pipe, and a steam exhaust pipe 23 is arranged above the residual activator slurry recovery tank 33, and a steam exhaust pipe 23 is arranged above the steam exhaust pipe is arranged.
When the peripheral ceramic treatment unit adopts a spraying treatment mode, a spraying device and a slurry collecting tank corresponding to the spraying device are adopted.
Fig. 6 is a schematic diagram of the structure of an aluminized unit in the dipping treatment mode. The aluminizing unit and the peripheral ceramic treatment unit are in an impregnation treatment mode, the heating mode adopted by the aluminizing unit or the peripheral ceramic treatment unit in the impregnation treatment mode is a short-circuit heating module, an intermediate-frequency or high-frequency heating module, the aluminizing unit or the peripheral ceramic treatment unit in the impregnation treatment mode comprises a steel bar impregnation tank, impregnating liquid 31 supply pipes and impregnating liquid collecting pipes 19 are respectively arranged at the two ends of the upper edge of the steel bar impregnation tank, the steel bar impregnation tank is a plastic tank or a metal tank with an insulating lining, a plurality of abrasion-resistant insulating rollers 32 are arranged at the bottom of the steel bar impregnation tank, the steel bar 10 is impregnated in liquid in the steel bar impregnation tank through a plurality of insulating guide rollers in the moving process, the aluminizing unit uses two steel bar impregnation tanks, and the peripheral ceramic treatment unit uses one steel bar impregnation tank.
Referring to fig. 6, when the peripheral ceramic treatment mode is structured by adopting one reinforcement impregnation tank, the aluminizing unit adopts an impregnation treatment mode, the reinforcement impregnation tank comprises an activator slurry impregnation tank 30a and a mixed slurry impregnation tank 30b and 36 for supplying an aluminum agent, a diluent and a loosening agent, the two reinforcement impregnation tanks are provided with a residual activator slurry recovery tank 33 and a residual activator slurry recovery branch pipe 22 thereof in the middle, a lyophobic device with ribs is arranged above the residual activator slurry recovery tank 33, the lyophobic device is a downward blowing hot air blower 21, the residual activator slurry recovery branch pipe 22 is arranged below the lyophobic device, the residual activator slurry recovery branch pipe 22 is communicated with an activator slurry collection pipeline 34, a valve 35 is arranged in the activator slurry collection pipeline 34 and the mixed slurry collection pipeline 37, the slurries in the activator slurry impregnation tank 30a and the mixed slurry collection pipeline 37 are both detected and re-proportioned and then returned to a circulating conveying pipeline, the activator slurry impregnation tank 30a and the mixed slurry impregnation tank 30b are arranged above the lyophobic device, and a steam exhaust pipe 23 is arranged above the vapor exhaust pipe 24.
When the steel bar dipping tank is adopted in the peripheral ceramic treatment unit, a longer steel bar dipping tank is adopted.
According to the steel bar preparation method with the corrosion-resistant layer, the corrosion-resistant layer is an aluminizing layer in the steel bar and/or a ceramic layer on the periphery of the steel bar, the corrosion-resistant layer is formed by arranging an aluminizing unit and a heating module thereof or/and a peripheral ceramic processing unit and a heating module thereof in the production line before or after the heat processing unit, the aluminizing unit adopts aluminizing slurry, the aluminizing slurry comprises activator slurry and aluminizing agent slurry, the activator slurry accounts for 4-10% of the aluminizing slurry, the activator is independently supplied to ribbed steel bars before the aluminizing agent and the diluent, the aluminizing agent comprises an aluminizing agent, a loosening agent and a diluent, the aluminizing agent comprises 20-30% of the aluminizing agent, 40-60% of the diluent and 20-35% of the loosening agent, wherein the aluminizing agent comprises 30-55% of aluminum powder, 15-15% of secondary aluminum ash, 2-5% of ammonium chloride and 2-5% of potassium fluoride; the diluent is mainly water, water-soluble phenolic resin is added, and the ratio of water to the water-soluble phenolic resin is 100:2; the activator is a mixed liquid of 1/10000 concentration of potassium chloride, 2/10000 concentration of potassium permanganate, 1.5/10000 concentration of sodium nitrite and the balance of water; the loosening agent is one or more of sodium bicarbonate, ammonium bicarbonate and bauxite, the activator slurry and the aluminizing agent slurry mixed according to the proportion are respectively supplied to respective circulating conveying pipelines until an activator slurry supply pipe is connected to a front sealing spraying device, a rear sealing spraying device is connected to a mixed slurry supply pipe for the aluminizing agent, a diluent and the loosening agent, the front sealing spraying device and the rear sealing spraying device are respectively used for spraying the mixture to the surface of the heated steel bar, the conveying speed of the steel bar is the same as that of the traditional steel bar conveying process, the heating temperature of the steel bar is 700-850 ℃, 850 ℃ heating temperature is adopted in the following embodiments, the slurry or impregnating slurry is sprayed on the surface of the steel bar while the steel bar is conveyed, and an aluminizing layer is formed in the surface layer of the steel bar.
The activating agent slurry plays a role in activating, and after activation, the mixed slurry of the aluminum donor, the diluent and the loosening agent is used for aluminizing. The actions of the various chemical agents in this embodiment are described above, and will not be described here.
Figure SMS_1
Note that: although the activator is shown in the table, in actual use, the activator slurry and other aluminized mixed slurries are collected as spray slurries using different lines and different collection tanks, respectively.
In the table one, examples 1-3 were aluminized by spraying and examples 4-6 were aluminized by dipping, and it can be seen from the data that the aluminizing depth and the surface hardness obtained by spraying are both superior to those obtained by dipping, and the aluminized steel bar produced by the two production processes has good corrosion resistance, and in the corrosion resistance test, the produced aluminized steel bar is soaked in 10% NaCl aqueous solution for 60 days, and the surface of the aluminized steel bar has slight ash-forming change, so that no obvious corrosion condition is seen.
According to the steel bar preparation method with the corrosion-resistant layer, the steel bar production line is utilized, the corrosion-resistant layer is an aluminized layer inside the steel bar and/or a ceramic layer on the periphery of the steel bar, the corrosion-resistant layer is formed by arranging an aluminized unit and a heating module thereof or/and a peripheral ceramic processing unit and a heating module thereof in the production line before or after the heat processing unit, the ceramic processing unit utilizes ceramic slurry, and the ceramic slurry comprises the following components in parts: 30-40 parts of boron carbide, 20-35 parts of silicon carbide, 10-20 parts of aluminum oxide, 5-8 parts of potassium feldspar, 3-7 parts of zirconium oxide and 0.3-0.6 part of graphene, wherein the purity of various raw materials in the ceramic slurry is above 98%, primary mixed powder with the particle size of 20-50nm is used as raw materials in the ceramic slurry, the mixed powder is diluted into slurry by water and phenolic resin, the slurry is conveyed into a steel bar dipping tank in a peripheral ceramic processing unit by using a circulating conveying pipeline, an air stirrer is arranged at the bottom of the steel bar dipping tank, the slurry is kept in a uniform state, the ceramic slurry mixed according to the proportion is supplied into the steel bar dipping tank, ribbed steel bars heated by a heating module roll along the steel bar dipping tank, the heating temperature of the steel bars is 850-900 ℃, the heating temperature of 880 ℃ is adopted in the following embodiments, the conveying speed of the steel bars is the same as that of the traditional steel bar conveying process, the ceramic layer is formed by conveying the surface while spraying or dipping the slurry on the peripheral surface.
Specific examples and evaluation results are as follows:
Figure SMS_2
note that: examples 1-3 in the table are spray test results, examples 4-6 are dipping test results, and the examples are examples after small test and pilot test are performed in a laboratory for simulating the actual running condition of a production line, and are test parameters after heat treatment, and the effect of dipping mode of the peripheral ceramic of the steel bar is superior to that of spray mode from the test results.
In addition, in the pilot stage of laboratory implementation, graphene oxide is used, and the generated test result is higher and far exceeds the required index of the product, so that the method is not adopted.
In the slurry, the graphene material is not needed, but after the graphene material is used, the impact strength, compactness and the like of the peripheral ceramic of the steel bar are improved by about 1-2%, and in the corrosion resistance test, the produced aluminized steel bar is soaked in 10% NaCl aqueous solution for 60 days, and the surface of the aluminized steel bar is free from any change.
Other evaluation indexes are improved to different degrees, and in a word, a compact ceramic protective layer can be formed on the surface of the steel bar by using the method.
The specific characteristics of the various chemical substances are as follows:
boron carbide: boron carbide (B) 4 C) Usually a grey-black micropowder. Used in armor, bullet-proof clothing and many industrial applications for tanks. Its Mohs hardness is about 9.5 and its purity is above 98%. Is unreactive with acid and alkali solution, and has high chemical level, neutron absorption, wear resistance and semiconductor conductivity. Is one of the most acid stable substances, stable in all concentrated or dilute acid or alkali aqueous solutions. Boron carbide can also be used as a ceramic coating for warships and helicopters, which is lightweight and has the ability to resist penetration of armor-piercing projectiles through the hot-pressed coating into an integral barrier.
Silicon carbide: silicon carbide (SiC) is an inorganic material, and is a common basic variety of silicon carbide, including black silicon carbide and green silicon carbide, and belongs to alpha-SiC. (1) Black silicon carbide contains about 95% SiC and has a toughness higher than green silicon carbide, and is mostly used for processing materials with low tensile strength, such as glass, ceramics, stone, refractory materials, cast iron, nonferrous metals, and the like. (2) The green silicon carbide contains more than 97% of SiC and has good self-sharpening property, and is mostly used for processing hard alloy, titanium alloy and optical glass, and is also used for honing cylinder liners and fine grinding high-speed steel cutters. In addition, the cubic silicon carbide is a yellow-green crystal prepared by a special process, and the grinding tool is suitable for superfinishing of bearings, so that the surface roughness can be processed from Ra 32-0.16 microns to Ra 0.04-0.02 microns at one time.
Alumina: alumina is a stable oxide of aluminum, with the chemical formula Al 2 O 3 . Also known as bauxite in the mining, ceramic and material sciences. The corundum in the nature is alpha-type, belongs to hexagonal closest packing, has high melting point and high hardness, and is mainly composed of alpha-Al 2 O 3， The density is 3.9-4.1 g/cm 3 The hardness is 9, the melting point is 2000+/-15 ℃ and the insulating property is good. The corundum powder with high hardness can be used as abrasive, polishing powder and high-temperature sintered alumina, which is called artificial corundum or artificial precious stone, and can be used for manufacturing diamond in mechanical bearings or clocks. Alumina is also used as a high temperature refractory material for refractory bricks, crucibles, porcelain, artificial precious stones, etc., and alumina is also a raw material for aluminum production. Calcining aluminium hydroxide to obtain gamma-Al 2 O 3 。γ-Al 2 O 3 Has strong adsorption capacity and catalytic activity, and can be used as adsorbent and catalyst.
Potassium feldspar: potassium feldspar (k2o·al2o3·6sio2), also commonly referred to as orthoclase, belongs to monoclinic systems and is usually reddish, white or gray.
Zirconia: in this embodiment, zirconium dioxide, represented by ZrO2, has properties of high melting point, high resistivity, high refractive index and low thermal expansion coefficient, so that it becomes an important high temperature resistant material, ceramic insulating material and ceramic opacifier, and is also a main raw material for artificial drilling. Zirconium oxide has high refractive index, high melting point and high corrosion resistance, so that the zirconium oxide is used as a kiln raw material. The piezoelectric ceramic product includes filter, loudspeaker ultrasonic wave hydroacoustic detector, etc. And domestic ceramics (industrial ceramic glaze), zirconium bricks for smelting noble metals, zirconium tubes, etc. Nanoscale zirconia can also be used as a matrix material for polishing agents, abrasive particles, piezoelectric ceramics, precision ceramics, ceramic glazes, and high temperature pigments.
Graphene: graphene (Graphene) is a new material in which carbon atoms connected by sp hybridization are closely packed into a single-layer two-dimensional honeycomb lattice structure [1 ]. The graphene has a large specific surface. The graphene has a large specific surface area, is easier to disperse in a ceramic matrix, can improve the interface performance of the ceramic matrix composite material, enhances the combination with the ceramic matrix, and is beneficial to the transmission of electronic, phonon and mechanical stress, so that the graphene is an ideal filler for preparing the ceramic composite material with excellent performance.
In the above embodiments, the aluminizing unit and the heating module thereof or/and the peripheral ceramic processing unit and the heating module thereof are provided in front of the heat treatment unit, and in the same manner, the aluminizing unit and the heating module thereof or/and the peripheral ceramic processing unit and the heating module thereof are provided in back of the heat treatment unit, which can achieve the same effects, and will not be described in detail herein.
By additionally arranging an aluminizing unit and/or an outer ceramic treatment unit in the production line of the cold rolled steel bar 10, a corrosion resistant layer of the steel bar 10 can be added on the inner layer or the periphery of the steel bar 10, so that the use in seawater is facilitated, the chronic corrosion of the seawater to the concrete of the steel bar 10, particularly to the steel bar 10, can be slowed down, the service life of the steel bar 10 in the seawater and even the service life of the concrete can be prolonged, the corrosion resistance of the marine or submarine concrete, particularly the ceramic insulating layer can be improved, and vortex can be prevented from being generated at the crossing position of the steel bar when a train passes through; the roller transmission device is arranged on the aluminizing unit or/and the peripheral ceramic processing unit, so that the transmission force after the production line is prolonged can be further increased on the basis of the original ribbed steel bar 10 transmission device; by adding an aluminizing unit or/and a peripheral ceramic unit in a production line, after the aluminizing process is carried out, active aluminum atoms which are generated by thermal decomposition and penetrate into metal elements are adsorbed on the surface of the ribbed steel bar 10, then are diffused into the surface layer of the steel bar 10 at a certain temperature, so that the chemical composition, the structure and the performance of the surface layer of the steel bar 10 are changed, compared with the original steel bar 10, the atomic radius of the penetrated metal elements is large, the gap of the original steel bar 10 atoms is filled, and a compound or passivation film formed after aluminizing has higher high-temperature oxidation resistance and seawater corrosion resistance and is suitable for different environments; after the ceramic process treatment of the peripheral ceramic units, a layer of hydrophobic smooth ceramic can be formed on the surface of the steel bar 10, and after the spraying of liquid such as aluminum fluoride, sodium fluoride and sodium chloride, the slurry on the surface can be cleaned, the surface can be coarsened, and the bonding with concrete is facilitated; the slurry is filtered, detected and reconfigured during circulation conveying through the circulation conveying pipeline connected with the slurry in the aluminizing unit or/and the peripheral ceramic processing unit, and the slurry is reused in the aluminizing unit or/and the peripheral ceramic processing unit, so that resources can be saved and the environment can be protected; the aluminizing unit and the peripheral ceramic treatment unit are respectively provided with a heating module, so that the aluminizing inside the steel bar 10 and the peripheral ceramic treatment of the steel bar 10 are realized according to the temperature environment formed by the aluminizing and the ceramic, the anticorrosion function is achieved, and the peripheral ceramic of the steel bar can ensure that vortex is not generated when high-speed rail passes through; by adopting a spraying treatment mode in the aluminizing unit and the peripheral ceramic treatment unit, aluminizing or ceramic slurry can be sprayed on the surface of the ribbed steel bar 10 under the heating condition, an aluminizing layer or ceramic surface layer can be formed on the surface layer or the periphery of the ribbed steel bar 10, and metal atoms permeated in the aluminizing slurry can be continuously permeated in the heat treatment process of the steel bar 10, so that the depth of the aluminizing layer is increased; by using the spraying device 20, the spray nozzle 13 can be arranged on the slurry spray pipe 12 connected between the end plates of the spraying device 20, so that aluminized and ceramic slurry can be sprayed to the periphery of the ribbed steel bar 10 while rotating around the axis of the through hole rotary joint 14, and particularly, by arranging two spraying devices 20, mixed slurry of an activating agent slurry, an aluminizing agent, a diluent and a loosening agent is respectively sent to the two spraying devices 20, the surface of the steel bar 10 can be activated in the former spraying device 20, and then the mixed slurry can be sprayed to the steel bar 10 in the latter spraying device 20, so that the absorption of the aluminized slurry is facilitated; the activator slurry collecting tank 10a and the mixed slurry collecting tank 10b for aluminum supplying agent, diluent and loosening agent are respectively arranged below the front spraying device 20 and the rear spraying device 20, so that the detection and the reconfiguration after the recovery are facilitated, the reutilization of slurry is facilitated, and the residual activator slurry recovering tank 33 and the activator slurry recovering branch pipe 22 thereof are arranged between the activator slurry collecting tank 10a and the mixed slurry collecting tank 10b or between the activator slurry impregnating tank 30a and the mixed slurry impregnating tank 30b below the front spraying device 20 and the rear spraying device 20, so that the blowing and the drying of the activator slurry at the periphery of the steel bar by the hot air blower 21 are facilitated, and the absorption and the bonding of the mixed slurry for aluminum supplying agent, diluent and loosening agent by the steel bar are facilitated; by using a plastic tank or a metal tank with an insulating lining, the electric on the steel bar 10 can be prevented from being communicated with the metal tank to form a short circuit, and the safety is more beneficial to improvement particularly in the case of using a short circuit heating module; the invention discloses a method for manufacturing a reinforced concrete, which comprises the steps of arranging a plurality of wear-resistant insulating rollers 32 at the bottom of a reinforced steel dipping tank, dipping the reinforced steel 10 in dipping liquid 31 in the reinforced steel dipping tank through a plurality of insulating guide rollers in the moving process, bonding ceramic slurry on the periphery of the reinforced steel 10 in the reinforced steel dipping tank, guiding a transmission route of the reinforced steel 10, preventing the reinforced steel 10 from bending, knotting and the like in the reinforced steel dipping tank, damaging normal transmission of the ribbed reinforced steel 10, guaranteeing normal aluminizing or forming a ceramic surface layer, forming an insulating ceramic layer and a seawater corrosion-resistant protective layer by spraying ceramic to the inside of the reinforced steel 10, preventing the high-speed rail from running, the seawater corrosion-resistant protective layer from improving the high chloride salt resistance of the reinforced steel, preventing the phenomena of chemical reaction with the surface of the reinforced steel 10, generating expansion stress, causing concrete loosening and the like, prolonging the service life of reinforced concrete in seawater and guaranteeing the quality of offshore engineering.

Claims (8)

1. Reinforcing bar production line with form corrosion-resistant layer, ribbed steel bar production line includes unwrapping wire unit, rolling unit, heat treatment unit and the receipts line unit that sets up along ribbed steel bar direction of transmission, its characterized in that: the aluminum-coated steel bar treatment device comprises a heat treatment unit, wherein an aluminum-coated unit and a heating module thereof or/and a peripheral ceramic treatment unit and a heating module thereof are arranged in front of or behind the heat treatment unit, the aluminum-coated unit or/and the peripheral ceramic treatment unit is provided with one or more roller transmission devices, the roller transmission devices transmit ribbed steel bars to the rear of a production line, the heating temperature of the heating module of the aluminum-coated unit or/and the peripheral ceramic treatment unit is 700-900 ℃, the aluminum-coated unit or/and the peripheral ceramic treatment unit adopts a spraying treatment mode or/and an immersion treatment mode, a circulating conveying pipeline provided with aluminum-coated slurry or/and ceramic slurry is connected in the aluminum-coated unit or/and the peripheral ceramic treatment unit, the circulating conveying pipeline is provided with a compression pump, and the tail ends of the aluminum-coated unit or/and the peripheral ceramic treatment unit are provided with cleaning devices;
the aluminizing unit and the peripheral ceramic treatment unit are aluminizing units or peripheral ceramic treatment units in a spraying treatment mode, each aluminizing unit or the peripheral ceramic treatment unit comprises a liquid collecting tank arranged below a reinforcing steel bar, a collecting pipeline is arranged below each liquid collecting tank, a spraying device which rotates along the periphery of the reinforcing steel bar is arranged above each liquid collecting tank, the spraying device is rotatably arranged on a bracket, a driving device drives the spraying device to rotate, each spraying device comprises end plates which are arranged at two ends, the periphery of one end plate is meshed with a driving gear to rotate through a toothed ring, a connecting rod is arranged between the end plates, an end hole is formed in the middle of each end plate, a hollow rotary joint is fixed at the outer side of each end plate end hole, the hollow rotary joint is positioned at the rotary axis of each end plate, the reinforcing steel bars are transmitted in the positions of through holes of the end plates, a plurality of connecting rods which are parallel to the reinforcing steel bars are arranged at the periphery of the opposite pair of end plates, each connecting rod is a slurry spray pipe, and one side of each slurry spray pipe is communicated with each end plate to each slurry spray pipe;
When the aluminizing unit is in a spraying treatment mode, two closed spraying devices are arranged, an activator slurry is connected to the front closed spraying device, a mixed slurry supply pipe for supplying an aluminum agent, a diluent and a loosening agent is connected to the rear closed spraying device, a residual activator slurry recovery tank and a residual activator slurry recovery branch pipe are respectively arranged between the front closed spraying device and the rear closed spraying device, an activator collecting tank and a collecting pipeline thereof and a mixed slurry collecting tank and a collecting pipeline thereof are respectively arranged below the two closed spraying devices, the residual activator slurry recovery branch pipe is communicated with the activator slurry collecting pipeline, a lyophobic device with ribs is arranged above the residual activator slurry recovery tank, the lyophobic device is a downward blowing hot air machine, the residual activator slurry recovery branch pipe is arranged below the lyophobic device, the slurry in the activator slurry collecting pipeline and the mixed slurry collecting pipeline is detected and re-proportioned and then returns to a circulating conveying pipeline, and when the peripheral ceramic treatment unit adopts the spraying treatment mode, and the closed spraying device is adopted.
2. The reinforcing bar production line with corrosion resistant layer forming function according to claim 1, wherein: the heat treatment unit is provided with an aluminizing unit and an outer ceramic treatment unit before or after the heat treatment unit, two short-circuit heating modules and a plurality of high-frequency or a plurality of intermediate-frequency heating modules are respectively arranged in the aluminizing unit and the outer ceramic treatment unit, and in a production line provided with the aluminizing unit and the outer ceramic treatment unit, the first two short-circuit heating modules and the plurality of high-frequency or a plurality of intermediate-frequency heating modules are used for the aluminizing unit in a spraying treatment mode or an impregnating treatment mode, and the second two short-circuit heating modules and the plurality of high-frequency or a plurality of intermediate-frequency heating modules are used for the outer ceramic treatment unit in the spraying treatment mode or the impregnating treatment mode.
3. The reinforcing bar production line with corrosion resistant layer forming function according to claim 1, wherein: the heating mode in the aluminizing unit or the peripheral ceramic processing unit is a short-circuit heating module, an intermediate-frequency heating module or a high-frequency heating module, the aluminizing unit uses two spraying devices, and the peripheral ceramic processing unit uses one spraying device.
4. The reinforcing bar production line with corrosion resistant layer forming function according to claim 1, wherein: the aluminizing unit and the peripheral ceramic treatment unit are in an impregnation treatment mode, the heating mode adopted by the aluminizing unit or the peripheral ceramic treatment unit in the impregnation treatment mode is a short-circuit heating module, an intermediate-frequency or high-frequency heating module, the aluminizing unit or the peripheral ceramic treatment unit in the impregnation treatment mode comprises a steel bar impregnation tank, impregnation liquid supply pipes and impregnation liquid collecting pipelines are respectively arranged at the two ends of the upper edge of the steel bar impregnation tank, the steel bar impregnation tank is a plastic tank or a metal tank with an insulating lining, a plurality of wear-resistant insulating rollers are arranged at the bottom of the steel bar impregnation tank, the steel bar is impregnated in liquid in the steel bar impregnation tank through a plurality of insulating guide rollers in the moving process, the aluminizing unit uses two steel bar impregnation tanks, and the peripheral ceramic treatment unit uses one steel bar impregnation tank.
5. The reinforcing bar production line with corrosion resistant layer forming function according to claim 1, wherein: the method is characterized in that: the cleaning device is a closed spraying device, a plurality of spray heads are arranged above the steel bars, the spray liquid comprises one or more solutions of 20-30% of aluminum fluoride, sodium fluoride and sodium chloride, the balance is water, the temperature of the steel bars in the closed spraying device is 400-550 ℃, steam discharge pipes are arranged at the upper end of the closed spraying device, recovery pipes are arranged at the lower end of the closed spraying device, and the spray liquid is utilized after being filtered, detected and re-proportioned.
6. The reinforcing bar production line with corrosion resistant layer forming function according to claim 4, wherein: when the aluminizing unit adopts an impregnation treatment mode, the steel bar impregnation tank comprises an activator slurry impregnation tank, a mixed slurry impregnation tank for supplying aluminum agent, a diluent and a loosening agent and a collecting pipeline thereof, a residual activator slurry recovery tank and a residual activator slurry recovery branch pipe are arranged between the activator slurry impregnation tank and the mixed slurry impregnation tank, the residual activator slurry recovery branch pipe is communicated with the activator slurry collection pipeline, a lyophobic device with ribbed steel bars is arranged above the residual activator slurry recovery tank, the lyophobic device is a down-blowing hot air blower, the slurry in the activator slurry collection pipeline and the mixed slurry collection pipeline is detected and re-proportioned and then returned to a circulating conveying pipeline, and when the steel bar impregnation tank is adopted in the peripheral ceramic treatment unit, a longer steel bar impregnation tank is adopted.
7. A method for preparing a reinforcing steel bar with a corrosion-resistant layer, using the reinforcing steel bar production line with a corrosion-resistant layer according to any one of claims 1 to 6, characterized in that: the corrosion-resistant layer is an aluminized layer inside the steel bar and/or a ceramic layer on the periphery of the steel bar, the corrosion-resistant layer is formed by arranging an aluminizing unit and a heating module thereof or/and a peripheral ceramic processing unit and a heating module thereof in a production line before or after the heat processing unit, the aluminizing unit adopts aluminizing slurry, the aluminizing slurry comprises aluminizing agent sizing material and activator slurry, the activator slurry accounts for 4-10% of the aluminizing slurry, the activator is independently supplied to the ribbed steel bar before the aluminizing agent and the diluent, the aluminizing agent comprises 20-30% of an aluminum donor, 40-60% of a diluent and 20-35% of a loosening agent, wherein the aluminum donor comprises 30-55% of aluminum powder, 15-15% of secondary aluminum ash, 2-5% of ammonium chloride and 2-5% of potassium fluoride; the diluent is mainly water, phenolic resin is externally added, and the ratio of water to water-soluble phenolic resin is 100:2; the activator is a mixed liquid of 1/10000 concentration of potassium chloride, 2/10000 concentration of potassium permanganate, 1.5/10000 concentration of sodium nitrite and the balance of water; the loosening agent is one or a mixture of sodium bicarbonate, ammonium bicarbonate and bauxite, the sizing material activator slurry of the aluminizing agent is respectively mixed in proportion, and then is supplied to an aluminizing unit along a circulating conveying pipeline for aluminizing treatment, the heating temperature of the steel bar is 700-850 ℃, and the steel bar is sprayed or immersed while being conveyed to form an aluminizing layer in the surface layer of the steel bar.
8. A method for preparing a reinforcing steel bar with a corrosion-resistant layer, using the reinforcing steel bar production line with a corrosion-resistant layer according to any one of claims 1 to 6, characterized in that: the corrosion-resistant layer is an aluminized layer inside the steel bar and/or a ceramic layer on the periphery of the steel bar, the corrosion-resistant layer is formed by arranging an aluminized unit and a heating module thereof or/and a peripheral ceramic processing unit and a heating module thereof in a production line before or after the heat processing unit, the ceramic processing unit utilizes ceramic slurry, and the parts of the ceramic slurry are as follows: 30-40 parts of boron carbide, 20-35 parts of silicon carbide, 10-20 parts of aluminum oxide, 5-8 parts of potassium feldspar, 3-7 parts of zirconium oxide and 0.3-0.6 part of graphene, wherein the purity of various raw materials in the ceramic slurry is above 98%, primary mixed powder with the particle size of 20-50nm is used as raw materials in the ceramic slurry, the mixed powder is diluted into slurry by water and phenolic resin, the slurry is conveyed into a steel bar dipping tank in a peripheral ceramic treatment unit by using a circulating conveying pipeline to carry out ceramic treatment on the periphery of a steel bar, an air stirrer is arranged at the bottom of the steel bar dipping tank, the slurry is kept in a uniform state, and the steel bar is conveyed while being sprayed or dipped under the heating condition, so that a ceramic layer is formed on the periphery of the steel bar.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1368332A (en) * 1971-08-12 1974-09-25 Nippon Kokan Kk Method of manufacturing aluminum coated steel strip
CN102765895A (en) * 2012-08-16 2012-11-07 舜元建设(集团)有限公司 Ceramic paint coating steel bar
CN203744771U (en) * 2014-03-19 2014-07-30 抚顺市天隆石化设备防腐厂 Carbon steel solid aluminized U-shaped tube heat exchanger tube bundle and special solid aluminizing equipment
CN106634076A (en) * 2016-12-08 2017-05-10 池州市三力精工机械有限公司 Corrosion-resistant stirring shaft and method for spraying and coating ceramic coating at surface of corrosion-resistant stirring shaft
CN109750288A (en) * 2018-12-11 2019-05-14 中北大学 A kind of preparation method of the corrosion-resistant composite coating of surface of low-carbon steel highly oxidation resistant
CN209162147U (en) * 2018-12-21 2019-07-26 河南省鼎鼎实业有限公司 A kind of cold rolled reinforcing bar annealing device
CN112007781A (en) * 2020-09-07 2020-12-01 烟台首钢磁性材料股份有限公司 Preparation device and preparation method of neodymium iron boron permanent magnet ceramic coating
CN114774668A (en) * 2022-04-19 2022-07-22 河南省鼎鼎实业有限公司 Ribbed steel bar short circuit heat treatment equipment and heating power supply thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1368332A (en) * 1971-08-12 1974-09-25 Nippon Kokan Kk Method of manufacturing aluminum coated steel strip
CN102765895A (en) * 2012-08-16 2012-11-07 舜元建设(集团)有限公司 Ceramic paint coating steel bar
CN203744771U (en) * 2014-03-19 2014-07-30 抚顺市天隆石化设备防腐厂 Carbon steel solid aluminized U-shaped tube heat exchanger tube bundle and special solid aluminizing equipment
CN106634076A (en) * 2016-12-08 2017-05-10 池州市三力精工机械有限公司 Corrosion-resistant stirring shaft and method for spraying and coating ceramic coating at surface of corrosion-resistant stirring shaft
CN109750288A (en) * 2018-12-11 2019-05-14 中北大学 A kind of preparation method of the corrosion-resistant composite coating of surface of low-carbon steel highly oxidation resistant
CN209162147U (en) * 2018-12-21 2019-07-26 河南省鼎鼎实业有限公司 A kind of cold rolled reinforcing bar annealing device
CN112007781A (en) * 2020-09-07 2020-12-01 烟台首钢磁性材料股份有限公司 Preparation device and preparation method of neodymium iron boron permanent magnet ceramic coating
CN114774668A (en) * 2022-04-19 2022-07-22 河南省鼎鼎实业有限公司 Ribbed steel bar short circuit heat treatment equipment and heating power supply thereof

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