Titanium-containing blast furnace slag treatment device and treatment method

Abstract

The invention provides a titaniferous blast furnace slag treatment device and method, and relates to the technical field of titaniferous blast furnace slag treatment.The titaniferous blast furnace slag treatment device comprises a treatment furnace, an injector is arranged at the top of the treatment furnace, the treatment furnace comprises a granulation furnace section and a reaction furnace section, and a centrifugal granulation device and a curing injection assembly are arranged in the granulation furnace section; comprising a gas pressurizing device, a particle feeder and an annular jet flow pipe fitting, the annular jet flow pipe fitting is arranged in the granulation furnace section in a penetrating manner; an annular groove is formed in the granulation furnace section, the groove wall of the annular groove is an arc-shaped groove wall, and the annular groove corresponds to the airflow film layer. Molten particles are cooled and solidified through an airflow film layer formed by spraying carbon monoxide mixed with copperas particles, slag particles are pushed at a high speed to collide with an annular groove and then are crushed secondarily, the slag particles obtained after secondary crushing are mixed with iron-containing particles generated by the copperas particles and then fall into the reaction furnace section to be fully stacked and reacted through waste heat, and the iron-containing particles obtained after secondary crushing and the copperas particles are separated. Ilmenite is formed through enrichment, and industrial treatment of the titanium-containing blast furnace slag through copperas is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of titanium-containing blast furnace slag treatment, and in particular to a titanium-containing blast furnace slag treatment device and treatment method. Background Art

[0002] Titanium-containing blast furnace slag is an industrial waste produced after blast furnace smelting using vanadium-titanium magnetite as raw material. Its main components are CaO, MgO, SiO2, Al2O3, and TiO2, with TiO2 content being a key indicator. Titanium is a precious metal, and titanium-containing blast furnace slag has a high TiO2 content, making it an important source of titanium resources. In traditional smelting processes, titanium is mostly lost as waste slag, but it can be recovered through enrichment technologies.

[0003] Titanium resources are mostly used to produce titanium dioxide, which is mostly produced using the sulfuric acid process. In this process, 3-4 tons of green vitriol (FeSO4·7H2O) are produced as a by-product for every ton of titanium dioxide produced. The green vitriol crystallized in the acidic solution will gradually dehydrate during storage, seriously polluting the environment. This makes the utilization of green vitriol a problem in the industry.

[0004] In the prior art, for example, patent CN104745748B discloses a method for magnetizing and converting the titanium component in titanium-containing blast furnace slag. This method involves uniformly mixing high-energy ball-milled titanium-containing blast furnace slag with green vitriol, calcining the mixture to obtain a primary conversion slag. The primary conversion slag is then finely ground and reacted with ammonium carbonate in an aqueous solution. The resulting secondary conversion slag is filtered and dried, and finally, the tertiary conversion slag is reduced with coal gas to convert tialite into magnetic ilmenite. While this patent utilizes green vitriol to treat titanium-containing blast furnace slag, the ball milling, fine grinding, solution reaction, and coal gas reduction steps involved in this patent consume significant resources and are complex, increasing the processing cost and time of the titanium-containing blast furnace slag and hindering its industrial application.

[0005] Therefore, how to use green vitriol to industrially treat titanium-containing blast furnace slag is an urgent problem to be solved in this technical field. Summary of the Invention

[0006] The purpose of the present invention is to provide a titanium-containing blast furnace slag treatment device and treatment method to improve the above-mentioned problems. In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: The present application provides a titanium-containing blast furnace slag processing device, comprising a processing furnace, an injector provided on the top of the processing furnace, the processing furnace comprising a granulating furnace section and a reaction furnace section, and a centrifugal granulating device provided in the granulating furnace section; The solidification spray assembly includes a gas pressurizing device, a particle feeder, and an annular jet pipe. The gas pressurizing device is used to pressurize carbon monoxide and inject it into the annular jet pipe. The particle feeder is used to feed green vitriol particles into the annular jet pipe. The annular jet pipe is provided through the granulating furnace section and is used to guide the high-pressure air flow to form an air flow film layer in the granulating furnace section; An annular groove is provided in the granulation furnace section, and the groove wall of the annular groove is set as an arc groove wall. The annular groove is set corresponding to the air flow film layer, so that after the molten particles granulated by the centrifugal granulation device come into contact with the air flow film layer, the air flow film layer cools down and solidifies the molten particles, and pushes the solidified molten particles to collide with the arc groove wall and then break them.

[0007] Preferably, the top of the arc-shaped groove wall is arranged to correspond to the air flow film layer ejected by the annular jet pipe, a guide ring plate is provided in the granulating furnace section, the outer wall of the guide ring plate is set to be an arc-shaped outer wall, the arc-shaped outer wall cooperates with the bottom of the arc-shaped groove wall to form a guide arc section, and the guide ring plate is provided with strip-shaped sieve holes.

[0008] Preferably, a chamber is provided on the outside of the reaction furnace section, the chamber is provided with an air inlet pipe and an air outlet pipe, a first fan is provided in the air outlet pipe, and a plurality of heat-conducting rods are connected through the reaction furnace section, and the heat-conducting rods are located in the chamber.

[0009] Preferably, the annular jet pipe includes a feed pipe, multiple diversion pipes and multiple arc nozzles. The feed pipe is arranged through the granulation furnace section, one end of the diversion pipe is connected to the feed pipe, and the arc nozzle is connected to the other end of the diversion pipe. The multiple arc nozzles are arranged in a ring shape in the granulation furnace section.

[0010] Preferably, a collecting barrel is provided in the head end of the feed pipe, and the tail end of the feed pipe is separated by multiple partitions to form multiple diversion channels, the diversion pipe is connected to the diversion channel, and the middle position where the multiple partitions are connected is rotatably connected to a diversion fan blade.

[0011] Preferably, a first pipe is connected to the top of the processing furnace, a second fan is provided in the first pipe, the first pipe is connected to the inlet of the gas drying filter, the outlet of the gas drying filter is connected to the heat exchanger through the second pipe, a third fan is provided in the end of the second pipe, the outlet of the heat exchanger is connected to the carbon monoxide separator, the carbon monoxide separator has a carbon monoxide outlet and an exhaust gas outlet, and the exhaust gas outlet is connected to the exhaust gas purification tower.

[0012] Preferably, the air outlet pipe is connected to the second pipeline, and a valve is provided on the air outlet pipe.

[0013] Preferably, a U-shaped pipe is connected through the processing furnace, one end of the U-shaped pipe is connected to the bottom of the granulation furnace section, and the other end of the U-shaped pipe is connected to the bottom of the reaction furnace section. Both ends of the U-shaped pipe are respectively connected to a barrier screen, and a fourth fan is provided in the U-shaped pipe. The fourth fan is used to transport the carbon monoxide in the granulation furnace section to the reaction furnace section.

[0014] Preferably, the bottom of the processing furnace is funnel-shaped, the bottom end of the processing furnace is connected to a knife gate valve, and a feeder is connected below the knife gate valve.

[0015] The present application also discloses a treatment method using the titanium-containing blast furnace slag treatment device, comprising the following steps: Set the rotation speed of the centrifugal granulation device to 1200 rpm-1500 rpm, and set the pressure intensity of the gas pressurizing device to 0.8 MPa-1.5 MPa; The usage ratio of carbon monoxide to green vitriol is 120m³-200m³ carbon monoxide / 1t green vitriol; After the molten titanium-containing blast furnace slag is injected into the injector, it flows into the centrifugal granulation device, and the centrifugal granulation device granulates the molten titanium-containing blast furnace slag into molten particles; After being pressurized and guided, carbon monoxide and green vitriol form an air flow film layer in the granulating furnace section. When the molten particles fall into the air flow film layer, the green vitriol in the air flow film layer absorbs the heat of the molten particles, and the green vitriol generates sulfur vapor and iron-containing particles. The molten particles cool down and solidify to obtain slag particles. The air flow film pushes the iron-containing particles and slag particles into the annular groove. The slag particles collide with the annular groove and then break into pieces. The crushed slag particles mix with the iron-containing particles and carbon monoxide in the annular groove and then fall into the reactor section and accumulate. The slag particles, iron-containing particles and carbon monoxide after secondary crushing are accumulated and reacted for 90-180 minutes using waste heat to enrich and form ilmenite; The slag particles are taken out from the reaction furnace section and the ilmenite is separated by magnetic separation.

[0016] The beneficial effects of the present invention are: The present invention granulates molten titanium-containing blast furnace slag into molten particles, and then uses an air flow film layer formed by spraying carbon monoxide mixed with green vitriol particles to cool and solidify the molten particles to obtain slag particles. The air flow film layer pushes the slag particles to move at high speed. The slag particles moving at high speed collide with an annular groove and are crushed for a second time. The slag particles after the second crushing are mixed with green vitriol particles in the annular groove to generate iron-containing particles, and then fall into the reactor section for accumulation. After fully stacking and reacting with the waste heat of the slag particles, they are enriched to form ilmenite. By fully utilizing the waste heat and green vitriol, the industrial treatment of titanium-containing blast furnace slag with green vitriol is realized.

[0017] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the embodiments of the present invention. The purposes and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a schematic diagram of the internal structure of the granulation furnace section of this application; Figure 3 This is a schematic diagram of the internal structure of the reactor section of this application; Figure 4 This is a schematic diagram of the annular jet pipe structure of the present application; Figure 5 This is a schematic diagram of the internal structure of the feed pipe of this application; Figure 6 This is a schematic diagram of the air outlet pipe connection of this application; Markings in the figure: treatment furnace 1, injector 11, granulation furnace section 12, annular groove 121, reaction furnace section 13, first pipeline 14, second fan 15, gas drying filter 16, second pipeline 17, heat exchanger 18, third fan 19, carbon monoxide separator 110, tail gas purification tower 111, centrifugal granulation device 2, solidification injection assembly 3, gas pressurizing device 31, particle feeder 32, annular jet pipe 33, feeding pipe 331, diverter pipe 332, arc nozzle 333, collecting barrel 334, partition 335, diverter channel 336, diverter fan blade 337, guide ring plate 4, strip sieve hole 41, chamber 5, air inlet pipe 51, air outlet pipe 52, first fan 53, heat conduction rod 54, valve 55, U-shaped pipe 6, barrier screen 61, fourth fan 62, knife gate valve 7, discharger 8. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are used only to distinguish the description and should not be understood as indicating or implying relative importance.

[0022] Example 1:

[0023] like Figure 1-Figure 2 As shown, this embodiment provides a titanium-containing blast furnace slag treatment device, including a treatment furnace 1, an injector 11 is provided on the top of the treatment furnace 1, the treatment furnace 1 includes a granulation furnace section 12 and a reaction furnace section 13, and a centrifugal granulation device 2 is provided in the granulation furnace section 12, characterized in that: The solidification spray assembly 3 includes a gas pressurizing device 31, a particle feeder 32, and an annular jet pipe 33. The gas pressurizing device 31 is used to pressurize carbon monoxide and inject it into the annular jet pipe 33. The particle feeder 32 is used to feed green vitriol particles into the annular jet pipe 33. The annular jet pipe 33 is provided through the granulating furnace section 12 and is used to guide the high-pressure air flow to form an air flow film layer in the granulating furnace section 12; An annular groove 121 is provided in the granulation furnace section 12. The groove wall of the annular groove 121 is set as an arc-shaped groove wall. The annular groove 121 is set corresponding to the air flow film layer so that after the molten particles granulated by the centrifugal granulation device 2 come into contact with the air flow film layer, the air flow film layer cools down and solidifies the molten particles, and pushes the solidified molten particles to collide with the arc-shaped groove wall and then break them.

[0024] It can be understood that when the titanium-containing blast furnace slag is processed, after the molten titanium-containing blast furnace slag is injected into the injector 11, the molten titanium-containing blast furnace slag flows from the injector 11 into the centrifugal granulation device 2, and the centrifugal granulation device 2 granulates the molten titanium-containing blast furnace slag into molten particles through centrifugal force; carbon monoxide and green vitriol are pressurized by the pressurizing device and guided by the annular jet pipe 33, and then sprayed in the granulation furnace section 12 to form an air flow film layer. When the molten particles fall into the air flow film layer, the green vitriol in the air flow film layer absorbs the high-temperature heat of the molten particles, and the green vitriol generates sulfur vapor and iron-containing particles. The sulfur vapor is a mixture of water vapor, sulfur dioxide, sulfur trioxide and carbon dioxide, and the iron-containing particles are a mixture of ferric oxide and iron, so that the molten particles are solidified after cooling to obtain slag particles; and the air flow film layer pushes the iron-containing particles The particles and slag particles are sprayed into the annular groove 121. The arc-shaped groove wall of the annular groove 121 is conducive to the separation of gas and solid, and avoids the collision between slag particles. The slag particles in a high-temperature state collide with the annular groove 121 and are crushed for the second time. The slag particles after the second crushing are mixed with iron-containing particles and carbon monoxide in the annular groove 121 and fall into the reactor section 13 for accumulation; the carbon monoxide entering the bottom of the air flow film layer enters the reactor section 13 under the push of the air flow. Carbon monoxide serves as a reducing gas and, under the action of the residual heat of the slag particles, promotes the reduction of ferric oxide to iron. The slag particles, iron-containing particles and carbon monoxide after the second crushing are fully accumulated and reacted by utilizing the residual heat of the slag particles to be enriched to form ilmenite. The slag particles are then taken out of the reactor section 13 and the ilmenite is separated by magnetic separation. In this technical solution, after the molten titanium-containing blast furnace slag is granulated into molten particles, an air flow film layer is formed by spraying carbon monoxide mixed with green vitriol particles to cool and solidify the molten particles to obtain slag particles, and the air flow film layer pushes the slag particles to move at high speed. The slag particles moving at high speed collide with the annular groove 121 and are crushed for the second time. The slag particles after the second crushing are mixed with the green vitriol particles to form iron-containing particles in the annular groove 121, and then fall into the reactor section 13 for accumulation. After the residual heat of the slag particles is fully accumulated and reacted, they are enriched to form ilmenite. By fully utilizing the waste heat and green vitriol, the industrial treatment of titanium-containing blast furnace slag using green vitriol is realized.

[0025] like Figure 2 As shown, the top of the arc-shaped groove wall corresponds to the air flow film layer sprayed by the annular jet pipe 33, and a guide ring plate 4 is provided in the granulating furnace section 12. The outer wall of the guide ring plate 4 is set as an arc-shaped outer wall. The arc-shaped outer wall cooperates with the bottom of the arc-shaped groove wall to form a guide arc segment, and a strip sieve hole 41 is provided through the guide ring plate 4.

[0026] It is understandable that the particle size of the slag particles after secondary crushing is uneven, and larger particle size slag particles are not conducive to the formation of ilmenite; therefore, a guide ring plate 4 is provided in the granulating furnace section 12, and the top of the arc-shaped groove wall corresponds to the air flow film layer sprayed by the annular jet pipe 33. After the high-speed moving slag particles collide with the annular groove 121 for secondary crushing, the air flow film layer is sprayed into the arc-shaped groove wall to form a guide airflow. Under the push of the guide airflow, the slag particles after secondary crushing are guided to flow toward the arc-shaped outer wall of the guide ring plate 4. After the smaller particle size slag particles are screened out through the strip sieve holes 41, they fall into the reactor section 13 and accumulate. The larger particle size slag particles that cannot pass through the strip sieve holes 41 flow back into the air flow film layer under the push of the guide airflow. The air flow film layer again drives the larger particle size slag particles to move at high speed and collide and crush with the annular groove 121 until the particle size of the slag particles can pass through the strip sieve holes 41.

[0027] like Figure 3 As shown, a chamber 5 is provided on the outside of the reactor section 13 , the chamber 5 is provided with an air inlet pipe 51 and an air outlet pipe 52 , a first fan 53 is provided in the air outlet pipe 52 , and a plurality of heat-conducting rods 54 are connected through the reactor section 13 , and the heat-conducting rods 54 are located in the chamber 5 .

[0028] It is understandable that the slag particles accumulated in the reactor section 13 still have a relatively high temperature, and an excessively high accumulation temperature is not conducive to the formation of ilmenite; therefore, a chamber 5 is provided on the outside of the reactor section 13, and a plurality of heat-conducting rods 54 are provided in the chamber 5 that passes through the reactor section 13. The plurality of heat-conducting rods 54 are in direct contact with the slag particles in the reactor section 13, and the heat of the slag particles is transferred to the chamber 5. When it is necessary to cool the slag particles accumulated in the reactor section 13, the first fan 53 drives the air flow in the chamber 5. The air enters the chamber 5 through the air inlet pipe 51 and is discharged through the air outlet pipe 52. The heat in the chamber 5 is taken away by the air flow, so as to gradually cool the slag particles in the reactor section 13, so that the temperature in the reactor section 13 drops to the required temperature range, and after the residual heat of the slag particles is fully accumulated and reacted, the slag particles in the reactor section 13 are cooled for a second time by restarting the first fan 53, so as to facilitate the subsequent treatment of the slag particles after the accumulation reaction.

[0029] like Figure 1 and Figure 4 As shown, the annular jet pipe 33 includes a feed pipe 331, multiple branch pipes 332 and multiple arc nozzles 333. The feed pipe 331 is set through the granulating furnace section 12, one end of the branch pipe 332 is connected to the feed pipe 331, and the arc nozzle 333 is connected to the other end of the branch pipe 332. The multiple arc nozzles 333 are arranged in a ring shape in the granulating furnace section 12.

[0030] It can be understood that after the gas pressurizing device 31 is connected to the carbon monoxide gas source, the carbon monoxide is pressurized and injected into the feed pipe 331, and the particle feeder 32 gradually feeds the green vitriol particles into the feed pipe 331. Under the action of pressure, the carbon monoxide mixed with the green vitriol particles enters multiple diversion pipes 332 respectively, and then is ejected out by the arc nozzle 333. The multiple arc nozzles 333 are arranged in a ring shape in the granulation furnace section 12, so that the jet airflows of the multiple arc nozzles 333 are combined to form an airflow film layer.

[0031] like Figure 5 As shown, a collecting barrel 334 is provided in the head end of the feed pipe 331, and the tail end of the feed pipe 331 is separated by multiple partitions 335 to form multiple diversion channels 336. The diversion pipe 332 is connected to the diversion channel 336, and the middle position where the multiple partitions 335 are connected is rotatably connected to the diversion fan blade 337.

[0032] It is understandable that the feed pipe 331 needs to uniformly transport the alum particles into the multiple branch pipes 332 through the pressurized carbon monoxide to ensure that the carbon monoxide and alum particles are evenly distributed in the formed air flow film layer. However, the alum particles are fed into the feed pipe 331 from one side by the particle feeder 32, resulting in the alum particles in the feed pipe 331 being unable to be uniformly transported into the multiple branch pipes 332. Therefore, a collecting barrel 334 is provided at the head end of the feed pipe 331 to collect the alum. After the particles enter the feed pipe 331, under the push of carbon monoxide, the green vitriol particles pass through the flow collection barrel 334 and gather in the middle position of the feed pipe 331. The diverter blade 337 rotates at high speed under the push of the pressurized carbon monoxide. When the green vitriol particles gathered in the middle position of the feed pipe 331 pass through the flow diverter blade 337, they are evenly entered into multiple diverter pipes 332 under the disturbance of the diverter blade 337, thereby ensuring the uniform distribution of carbon monoxide and green vitriol particles in the formed air flow film layer.

[0033] like Figure 1 As shown, a first pipe 14 is connected to the top of the processing furnace 1, a second fan 15 is provided in the first pipe 14, the first pipe 14 is connected to the inlet of the gas drying filter 16, the outlet of the gas drying filter 16 is connected to the heat exchanger 18 through the second pipe 17, a third fan 19 is provided in the end of the second pipe 17, the outlet of the heat exchanger 18 is connected to the carbon monoxide separator 110, the carbon monoxide separator 110 has a carbon monoxide outlet and an exhaust gas outlet, and the exhaust gas outlet is connected to the exhaust gas purification tower 111.

[0034] It is understandable that spraying to form an air flow film layer in the granulating furnace section 12 will consume a large amount of carbon monoxide, and the carbon monoxide that does not participate in the reaction will leak into the air, causing air pollution and waste of resources. Therefore, the top of the processing furnace 1 is connected to the first pipe 14, and the first pipe 14 is provided with a second fan 15. When the air flow film layer is sprayed in the granulating furnace section 12, the second fan 15 is started. The second fan 15 guides the carbon monoxide in the granulating furnace section 12 and the sulfur vapor generated by the reaction into the first pipe 14, and removes water in the mixed gas through the gas drying filter 16. Steam, sulfur and particulate impurities, and then the mixed gas, under the guidance of the third fan 19, enters the heat exchanger 18 through the second pipe 17 for heat exchange, and the heat in the mixed gas is recovered and utilized, and then the mixed gas enters the carbon monoxide separator 110 to separate the carbon monoxide in the mixed gas, and the separated carbon monoxide is recovered and collected through the carbon monoxide outlet for reuse, and the tail gas outlet of the carbon monoxide separator 110 discharges the tail gas of the mixed gas into the tail gas purification tower 111, and then the tail gas is purified by the tail gas purification tower 111.

[0035] like Figure 6 As shown, the air outlet pipe 52 is connected to the second pipeline 17, and a valve 55 is provided on the air outlet pipe 52.

[0036] It is understandable that during the treatment of titanium-containing blast furnace slag, residual gas and particles will be mixed into the air outside the treatment furnace 1, causing air pollution; therefore, the outlet pipe 52 of the chamber 5 is connected to the second pipe 17, and after the first fan 53 is started, the air outside the treatment furnace 1 enters the chamber 5 through the air inlet pipe 51 and is discharged into the second pipe 17 through the outlet pipe 52. The heat in the chamber 5 is brought into the heat exchanger 18 by the air for recovery, and then the carbon monoxide in the air outside the treatment furnace 1 is separated by the carbon monoxide separator 110. Then, the air outside the treatment furnace 1 enters the tail gas purification tower 111 for purification treatment. When the slag particles in the reactor section 13 are not cooled, the outlet pipe 52 is blocked from being connected to the second pipe 17 by the valve 55 to prevent the gas in the second pipe 17 from leaking out from the outlet pipe 52, thereby achieving the purpose of cooling the slag particles in the reactor section 13 while purifying the air outside the treatment furnace 1.

[0037] like Figure 1 and Figure 3 As shown, the processing furnace 1 is connected with a U-shaped pipe 6, one end of the U-shaped pipe 6 is connected with the bottom of the granulating furnace section 12, and the other end of the U-shaped pipe 6 is connected with the bottom of the reaction furnace section 13, and the two ends of the U-shaped pipe 6 are respectively connected with a blocking screen 61. A fourth fan 62 is arranged in the U-shaped pipe 6, and the fourth fan 62 is used to transport the carbon monoxide in the granulating furnace section 12 to the reaction furnace section 13.

[0038] It can be understood that under the action of the high temperature of the slag particles, the carbon monoxide in the reactor section 13 will rise into the granulation furnace section 12, resulting in little reduction effect of carbon monoxide on the slag particles and iron-containing particles. Therefore, a U-shaped pipe 6 is arranged between the granulation furnace section 12 and the reactor section 13, and a barrier screen 61 is connected to both ends of the U-shaped pipe 6 to prevent slag particles from entering the U-shaped pipe 6. When the fourth fan 62 is started, the carbon monoxide in the granulation furnace section 12 is transported to the reactor section 13, so that the carbon monoxide circulates from bottom to top, and the slag particles and iron-containing particles in the reactor section 13 can be in a carbon monoxide atmosphere, thereby ensuring the reduction effect of carbon monoxide on the slag particles and iron-containing particles.

[0039] like Figure 3 As shown, the bottom of the processing furnace 1 is arranged in a funnel shape, the bottom end of the processing furnace 1 is connected to a knife gate valve 7, and a feeder 8 is connected below the knife gate valve 7.

[0040] It can be understood that by setting the bottom of the processing furnace 1 in a funnel shape, the slag particles in the reactor section 13 are easily discharged, and the knife gate valve 7 regulates the opening or closing of the bottom end of the processing furnace 1. After the slag particles in the reactor section 13 are fully accumulated and reacted, the knife gate valve 7 is opened, and the slag particles in the reactor section 13 are discharged and removed through the discharger 8.

[0041] Example 2:

[0042] A treatment method using the titanium-containing blast furnace slag treatment device described in Example 1 above comprises the following steps: The rotation speed of the centrifugal granulation device 2 is set to 1200 rpm, and the pressure strength of the gas pressurizing device 31 is set to 1.2 MPa; The dosage ratio of carbon monoxide to green vitriol is 150m³ carbon monoxide / 1t green vitriol; After the molten titanium-containing blast furnace slag is injected into the injector 11, it flows into the centrifugal granulation device 2, and the centrifugal granulation device 2 granulates the molten titanium-containing blast furnace slag into molten particles; After being pressurized and guided, carbon monoxide and green vitriol form an air flow film layer in the granulating furnace section 12. When the molten particles fall into the air flow film layer, the green vitriol in the air flow film layer absorbs the heat of the molten particles, and the green vitriol generates sulfur vapor and iron-containing particles. The molten particles cool down and solidify to obtain slag particles. The air flow film pushes the iron-containing particles and slag particles into the annular groove 121. The slag particles collide with the annular groove 121 and are crushed secondary. The crushed slag particles are mixed with the iron-containing particles and carbon monoxide in the annular groove 121 and fall into the reactor section 13 and accumulate. The slag particles, iron-containing particles and carbon monoxide after secondary crushing are piled up and reacted for 180 minutes using waste heat to enrich and form ilmenite; The slag particles are taken out from the reaction furnace section 13 and the ilmenite is separated by magnetic separation.

[0043] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

[0044] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A titanium-containing blast furnace slag treatment device, comprising a treatment furnace, an injector provided on the top of the treatment furnace, the treatment furnace comprising a granulation furnace section and a reaction furnace section, a centrifugal granulation device provided in the granulation furnace section, characterized in that: The solidification spray assembly includes a gas pressurizing device, a particle feeder, and an annular jet pipe. The gas pressurizing device is used to pressurize carbon monoxide and inject it into the annular jet pipe. The particle feeder is used to feed green vitriol particles into the annular jet pipe. The annular jet pipe is provided through the granulating furnace section and is used to guide the high-pressure airflow to form an airflow film layer in the granulating furnace section; An annular groove is provided in the granulation furnace section, and the groove wall of the annular groove is set as an arc groove wall. The annular groove is set corresponding to the air flow film layer, so that after the molten particles granulated by the centrifugal granulation device come into contact with the air flow film layer, the air flow film layer cools down and solidifies the molten particles, and pushes the solidified molten particles to collide with the arc groove wall and then break them.

2. The titanium-containing blast furnace slag treatment device according to claim 1, characterized in that: The top of the arc-shaped groove wall corresponds to the air flow film layer sprayed by the annular jet pipe. A guide ring plate is provided in the granulating furnace section. The outer wall of the guide ring plate is set as an arc-shaped outer wall. The arc-shaped outer wall cooperates with the bottom of the arc-shaped groove wall to form a guide arc section. The guide ring plate is provided with strip sieve holes.

3. The titanium-containing blast furnace slag treatment device according to claim 1, characterized in that: A chamber is provided outside the reactor section, the chamber is provided with an air inlet pipe and an air outlet pipe, a first fan is provided in the air outlet pipe, a plurality of heat conducting rods are connected through the reactor section, and the heat conducting rods are located in the chamber.

4. The titanium-containing blast furnace slag treatment device according to claim 1, characterized in that: The annular jet pipe includes a feed pipe, multiple diversion pipes and multiple arc nozzles. The feed pipe is set through the granulation furnace section. One end of the diversion pipe is connected to the feed pipe, and the arc nozzle is connected to the other end of the diversion pipe. The multiple arc nozzles are arranged in a ring shape in the granulation furnace section.

5. The titanium-containing blast furnace slag treatment device according to claim 4, characterized in that: A collecting barrel is provided in the head end of the feed pipe, and a plurality of diversion channels are formed at the tail end of the feed pipe by a plurality of partitions. The diversion pipe is connected to the diversion channel, and a diversion fan blade is rotatably connected to the middle position where the plurality of partitions are connected.

6. The titanium-containing blast furnace slag treatment device according to claim 3, characterized in that: A first pipe is connected to the top of the processing furnace, a second fan is provided in the first pipe, the first pipe is connected to the inlet of the gas drying filter, the outlet of the gas drying filter is connected to the heat exchanger through the second pipe, a third fan is provided in the end of the second pipe, the outlet of the heat exchanger is connected to the carbon monoxide separator, the carbon monoxide separator has a carbon monoxide outlet and an exhaust gas outlet, and the exhaust gas outlet is connected to the exhaust gas purification tower.

7. The titanium-containing blast furnace slag treatment device according to claim 6, characterized in that: The air outlet pipe is communicated with the second pipeline, and a valve is provided on the air outlet pipe.

8. The titanium-containing blast furnace slag treatment device according to claim 1, characterized in that: A U-shaped pipe is connected through the processing furnace, one end of the U-shaped pipe is connected to the bottom of the granulating furnace section, and the other end of the U-shaped pipe is connected to the bottom of the reaction furnace section. Both ends of the U-shaped pipe are respectively connected to a barrier screen. A fourth fan is provided in the U-shaped pipe, and the fourth fan is used to transport the carbon monoxide in the granulating furnace section to the reaction furnace section.

9. The titanium-containing blast furnace slag treatment device according to claim 1, characterized in that: The bottom of the processing furnace is arranged in a funnel shape. The bottom end of the processing furnace is connected to a knife gate valve, and a feeder is connected below the knife gate valve.

10. A treatment method using the titanium-containing blast furnace slag treatment device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Set the rotation speed of the centrifugal granulation device to 1200 rpm-1500 rpm, and set the pressure intensity of the gas pressurizing device to 0.8 MPa-1.5 MPa; The usage ratio of carbon monoxide to green vitriol is 120m³-200m³ carbon monoxide / 1t green vitriol; After the molten titanium-containing blast furnace slag is injected into the injector, it flows into the centrifugal granulation device, and the centrifugal granulation device granulates the molten titanium-containing blast furnace slag into molten particles; After being pressurized and guided, carbon monoxide and green vitriol form an air flow film layer in the granulating furnace section. When the molten particles fall into the air flow film layer, the green vitriol in the air flow film layer absorbs the heat of the molten particles, and the green vitriol generates sulfur vapor and iron-containing particles. The molten particles cool down and solidify to obtain slag particles. The air flow film pushes the iron-containing particles and slag particles into the annular groove. The slag particles collide with the annular groove and then break into pieces. The crushed slag particles mix with the iron-containing particles and carbon monoxide in the annular groove and then fall into the reactor section and accumulate. The slag particles, iron-containing particles and carbon monoxide after secondary crushing are accumulated and reacted for 90-180 minutes using waste heat to enrich and form ilmenite; The slag particles are taken out from the reaction furnace section and the ilmenite is separated by magnetic separation.

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