A multi-stage rusting system and a rusting method for iron-containing minerals

Abstract

The present application relates to the technical field of iron-containing mineral corrosion, and particularly relates to a multi-stage corrosion system for iron-containing minerals, which comprises a stirring tank, a second-stage bubble corrosion pipe group, a third-stage corrosion storage tank, a cyclone and a heavy phase storage tank; and a multi-stage corrosion method for iron-containing minerals, which comprises the following steps: S1: iron-containing minerals and an acidic corrosion solution are put into the stirring tank for stirring, and oxygen-containing gas is introduced into the spiral gas pipe; S2: the iron-containing mineral corrosion mixture flows downward, the oxygen-containing gas spirally flows upward, and second-stage corrosion treatment is performed; S3: the mixture enters the third-stage corrosion storage tank for third-stage corrosion treatment; S4: the mixture enters the cyclone for separation, and the titanium-rich material enters the heavy phase storage tank; and S5: the mixture is pumped back to the stirring tank, and the above steps are repeated. The present application can greatly shorten the overall time of corrosion treatment, significantly improve the efficiency of corrosion treatment, reduce the probability of titanium-rich material pumping back, significantly reduce energy consumption, and improve production efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of iron-containing mineral rusting, and particularly relates to a multi-stage rusting system for iron-containing minerals and a rusting method. BACKGROUND

[0002] Artificial rutile, also known as synthetic rutile, is a kind of rich-titanium raw material which is produced by separating most of the iron component in ilmenite by chemical processing method and is the same as natural rutile in composition and structural performance. At present, the common industrial production technology of artificial rutile at home and abroad includes acid leaching method and the like. The traditional process of the acid leaching method generally comprises the following steps: (1) crushing the mineral into particles with a certain particle size; (2) putting the acid rusting liquid and the mineral into a reaction tank for stirring; (3) in the process of stirring, air / oxygen is introduced to make the iron in the iron-containing mineral oxidized and rusted to generate small iron oxide particles which fall off from the mineral body into the rusting liquid; and (4) separating the mineral body from the iron oxide slurry. The rusting treatment in the above existing technology mainly has the following problems: (1) the contact area between air and the mineral is limited, which leads to low oxidation and rusting efficiency, and the heavy phase after cyclone needs to be repeatedly mixed and rusted for multiple times, resulting in high energy consumption and low efficiency; and (2) the stirring tank is generally open, and if high-concentration oxygen is introduced, part of the oxygen which does not fully participate in the reaction will be directly scattered, increasing the production cost. SUMMARY

[0003] In view of the above problems, the present application provides a multi-stage rusting system for iron-containing minerals and a rusting method to solve the above problems in the background art.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0005] A multi-stage rusting system for iron-containing minerals comprises a stirring tank, a second-stage bubble rusting pipe group, a third-stage rusting storage tank, a cyclone and a heavy phase storage tank. The upper part of the stirring tank is provided with a feeding main pipe. The second-stage bubble rusting pipe group comprises a plurality of bubble spiral pipes. The main body of the bubble spiral pipe is a spiral pipe structure, and a spiral air pipe is arranged in the spiral pipe. A plurality of air outlets are arranged on the side wall of the spiral air pipe, and the top end of the spiral air pipe is closed. The lower end of the spiral air pipe is connected with a positive pressure air pipe. The bubble spiral pipe connects the stirring tank and the third-stage rusting storage tank. The third-stage rusting storage tank is provided with a discharging pipe which is connected with the feeding inlet of the cyclone. The heavy phase discharging outlet at the lower end of the cyclone is connected with the feeding inlet of the heavy phase storage tank.

[0006] Optionally, the second-stage bubble rusting pipe group further comprises a support column which is arranged between the stirring tank and the third-stage rusting storage tank. The bubble spiral pipe is spirally fixed on the support column. Optionally, the lower end of the bubble spiral pipe is connected with the feeding pipe of the storage tank.

[0007] Optionally, the lower end of the feed pipe of the storage tank extends to the bottom of the three-stage corrosion storage tank.

[0008] Optionally, a plurality of discharge pipes are arranged along the lower part of the three-stage corrosion storage tank.

[0009] Optionally, a communication pipe is arranged between the stirring tank and the three-stage corrosion storage tank, and a gas valve is arranged on the communication pipe.

[0010] Optionally, the heavy phase storage tank is provided with a reflux pipe, and the upper end of the reflux pipe is in communication with the feed main pipe.

[0011] Optionally, the stirring tank is a closed stirring tank, and a material valve is arranged on the feed main pipe. A multi-stage corrosion method of iron-containing minerals using the multi-stage corrosion system of iron-containing minerals as described above, comprising:

[0012] S1: iron-containing minerals and acid corrosion liquid are put into the stirring tank to be stirred into iron-containing mineral corrosion mixture, and oxygen-containing gas is introduced into the spiral pipe during stirring, and the gas pressure in the stirring tank is controlled to be less than the gas pressure in the positive pressure pipe; the bubbles entering the stirring tank from the bubble spiral pipe are subjected to one-stage corrosion treatment with the iron-containing mineral corrosion mixture;

[0013] S2: the iron-containing mineral corrosion mixture flows downward in the bubble spiral pipe, and oxygen-containing gas flows upward in the spiral pipe from the lower end of the spiral pipe and enters the bubble spiral pipe from the gas outlet hole to mix with the downward flowing iron-containing mineral corrosion mixture for two-stage corrosion treatment, and the formed bubbles flow upward into the stirring tank;

[0014] S3: the iron-containing mineral corrosion mixture after two-stage corrosion treatment and part of the bubbles enter the three-stage corrosion storage tank for three-stage corrosion treatment;

[0015] S4: the iron-containing mineral corrosion mixture after three-stage corrosion treatment enters the cyclone for separation, and after separation, titanium-rich material and iron oxide slurry are obtained; the titanium-rich material enters the heavy phase storage tank;

[0016] S5: the titanium-rich material in the heavy phase storage tank is sampled for inspection, and according to the inspection result, the titanium-rich material in the heavy phase storage tank can be selected to be drawn back to the stirring tank, and the above steps are repeated;

[0017] S6: the iron oxide slurry and the titanium-rich material are collected and treated respectively.

[0018] Optionally, in the step S5, if the ore pulp concentration reaches 8-13% and the ore body iron content is greater than 10%, the titanium-rich material in the heavy phase storage tank is pumped back to the stirring tank.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] (1) The device can greatly shorten the overall time of corrosion treatment, significantly improve the efficiency of corrosion treatment, reduce the probability of titanium-rich material pumping back, significantly reduce energy consumption, and improve production efficiency.

[0021] (2) The method can realize adjustable and controllable slurry flow rate, and the multi-stage corrosion treatment can realize relatively lower oxygen content concentration while passing in oxygen-containing gas, and achieve the same or more sufficient reaction effect compared with the traditional method, thereby reducing the cost of oxygen raw materials, improving the efficiency of corrosion treatment, and having better controllability.

[0022] (3) The stirring tank is a closed stirring tank, and the gas after the bubble spiral pipe reaction can also be passed into the stirring tank for continuous reaction, and serves as a gas pressure source to realize the regulation of slurry flow rate. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description.

[0024] Fig. 1 is a structural schematic diagram of the multi-stage corrosion system of the present application;

[0025] Fig. 2 is a partial perspective view of the bubble spiral pipe of the present application. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] In the description of the present application, it should be noted that the terms "in", "front", "back", "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In the description of the present application, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "arrangement", "connection" should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] A multi-stage rusting system of iron-containing minerals, as shown in Figs. 1-2 The device body 1 comprises, from top to bottom, a stirring pool 1-1, a two-stage bubble rusting pipe group 1-2, a three-stage rusting storage pool 1-3, a cyclone 13 and a heavy phase storage pool 15; the upper part of the stirring pool 1-1 is provided with a feeding main pipe 26, and a stirring device 5 is arranged inside the feeding main pipe 26, and the stirring device is driven by a motor 2; the two-stage bubble rusting pipe group 1-2 comprises a plurality of bubble spiral pipes 8; in the embodiment, in order to improve the stability of the bubble spiral pipe 8, the two-stage bubble rusting pipe group 1-2 further comprises a support column 9, which is arranged between the stirring pool 1-1 and the three-stage rusting storage pool 1-3; in the embodiment, a plurality of support columns 9 are arranged, and are arranged in a circular interval, and can be arranged in several circles and uniformly arranged on the bottom surface of the stirring pool 1-1; and a plurality of bubble spiral pipes 8 can improve the processing efficiency.

[0030] The bubble spiral pipe 8 is spirally fixed on the support column 9. The main body of the bubble spiral pipe 8 is a spiral pipe structure, as shown in Fig. 2 The inside of the spiral pipe is provided with a spiral air pipe 8-1, that is, the spiral air pipe 8-1 is spirally arranged synchronously with the bubble spiral pipe 8; in order to improve the stability of the spiral air pipe 8-1, in the embodiment, the spiral air pipe 8-1 can be fixed to the inner wall of the bubble spiral pipe 8 by a plurality of fixing rods 8-2; a plurality of air outlets 8-1-1 are arranged on the side wall of the spiral air pipe 8-1, and the top end of the spiral air pipe 8-1 is closed to prevent the liquid from flowing into the spiral air pipe 8-1; the lower end of the spiral air pipe 8-1 is communicated with a positive pressure air pipe 23, and the positive pressure air pipe 23 is connected with a positive pressure air pump or an oxygen-containing compressed gas tank, and a pressure stabilizing valve or a pressure regulating valve needs to be additionally arranged when the oxygen-containing compressed gas tank is connected; the bubble spiral pipe 8 communicates the stirring pool 1-1 and the three-stage rusting storage pool 1-3; in the embodiment, in order to facilitate the regulation of the air pressure of the three-stage rusting storage pool 1-3, the following scheme is preferred: the lower end of the bubble spiral pipe 8 is communicated with a storage pool feeding pipe 10, and the lower end of the storage pool feeding pipe 10 extends to the bottom of the three-stage rusting storage pool 1-3.

[0031] The configuration of the bubble spiral pipe 8 plays a role in the present embodiment, which is: 1. Several bubble spiral pipes 8 play a role of flow distribution, improving the reaction efficiency; 2. Through the spiral design, the travel distance of the iron-containing mineral corrosion mixed solution is increased; 3. The spiral pipe 8-1 can continuously blow out the oxygen-containing gas in the whole spiral flow, ensuring that the mineral particles in the fluid can fully contact with oxygen, and then react, improving the processing efficiency; 4. By controlling the air inlet amount, the air outlet amount (bubble amount) can be controlled, which can increase the fluidity of the slurry and improve the processing efficiency; 5. The slurry flows from top to bottom, and the gas (part of the bubbles) flows from bottom to top, so that the mineral particles in the fluid can have the opportunity to contact oxygen, reducing the phenomenon that part of the mineral particles cannot contact oxygen in the traditional stirring scheme (i.e. the phenomenon of starvation reaction, which leads to insufficient reaction of part of the reaction within a certain reaction time and low efficiency); 6. Part of the oxygen not involved in the reaction continues to flow into the stirring tank 1-1 and is stirred and reacted.

[0032] The three-stage corrosion storage tank 1-3 is provided with a discharge pipe 12, the discharge pipe 12 is in communication with the feed inlet of the cyclone 13; the lower end of the heavy phase discharge port 14 of the cyclone 13 is in communication with the feed inlet of the heavy phase storage tank; and the light phase outlet 11 is in communication with the iron oxide slurry collecting pipe; in the present embodiment, in order to improve the processing efficiency, a plurality of discharge pipes 12 are arranged, and a plurality of discharge pipes 12 are arranged in a circle along the lower part of the three-stage corrosion storage tank 1-3; and the cyclone 13 is also correspondingly arranged in a circle.

[0033] Optionally, a communication air pipe 7 is arranged between the stirring pool 1-1 and the three-stage corrosion storage pool 1-3, the communication air pipe 7 is provided with an air valve 6, and the top of the communication air pipe 7 is arranged above the highest liquid surface 4 of the stirring pool 1-1; the arrangement is used to adjust the air pressure ratio between the stirring pool 1-1 and the three-stage corrosion storage pool 1-3, and the adjustment of the processing rate of the second-stage bubble corrosion pipe group 1-2 is realized by adjusting the air pressure ratio; for example, in use, as the gas in the second-stage bubble corrosion pipe group 1-2 continuously enters the stirring pool 1-1, the air pressure in the stirring pool 1-1 rises, which is beneficial to improve the gas saturation in the liquid, and meanwhile, the rising of the air pressure in the stirring pool 1-1 can improve the flow speed of the slurry in the bubble spiral pipe 8; if the environmental temperature and other factors affect the reaction efficiency, the air pressure in the three-stage corrosion storage pool 1-3 can be increased to reduce the flow speed of the slurry in the bubble spiral pipe 8, increase the time of the section, and ensure the reaction effect. Meanwhile, the adjustment of the efficiency of the cyclone 13 can be realized by adjusting the air pressure in the three-stage corrosion storage pool 1-3. In the embodiment, the stirring pool 1-1 and the three-stage corrosion storage pool 1-3 are respectively provided with a pressure gauge 3 and a pressure gauge 22, and are respectively provided with a pressure relief valve and a safety valve (not shown). In order to facilitate the control of the liquid surface, the stirring pool 1-1 and the three-stage corrosion storage pool 1-3 are respectively provided with a communication pipe 25 and a communication pipe 21 in the embodiment. In the embodiment, the heavy phase storage pool 15 can be optionally arranged in an open mode same as the atmosphere, and in order to improve the stability of the cyclone 13, the three-stage corrosion storage pool 1-3 and the heavy phase storage pool 15 are provided with a reinforcing column 17 in the embodiment, and the cyclone 13 is fixed on the reinforcing column 17.

[0034] Optionally, the heavy phase storage pool 15 is provided with a backflow pipe 18; the backflow pipe 18 is connected with a pressure pump 19 and communicates with the feed main pipe 26 through a connecting pipe 20, the connecting pipe 20 is provided with a material valve (not shown), in order to ensure the compactness of the stirring pool 1-1, the feed main pipe 26 is provided with a material valve 27 in the embodiment, and the material valve 27 is arranged between the stirring pool 1-1 and the connecting pipe 20. The lower part of the heavy phase storage pool 15 is provided with a discharge pipe 16, and the discharge pipe 16 is provided with a valve.

[0035] A multi-stage corrosion method of iron-containing minerals, using the multi-stage corrosion system of iron-containing minerals as described above, comprising:

[0036] S1: iron-containing mineral and acid corrosion liquid are put into the stirring tank to be stirred into iron-containing mineral corrosion mixture, and oxygen-containing gas is introduced into the spiral pipe during stirring, and the gas pressure in the stirring tank is controlled to be less than the gas pressure in the positive pressure pipe; the bubbles from the bubble spiral pipe into the stirring tank are subjected to a first corrosion treatment with the iron-containing mineral corrosion mixture;

[0037] S2: the iron-containing mineral corrosion mixture flows downward in the bubble spiral pipe, oxygen-containing gas flows upward in the spiral pipe from the lower end of the spiral pipe and enters the bubble spiral pipe from the air outlet hole to mix with the downward flowing iron-containing mineral corrosion mixture to be subjected to a second corrosion treatment, and the generated bubbles flow upward into the stirring tank;

[0038] S3: the iron-containing mineral corrosion mixture after the second corrosion treatment and part of the bubbles enter the third corrosion storage tank to be subjected to a third corrosion treatment;

[0039] S4: the iron-containing mineral corrosion mixture after the third corrosion treatment enters the cyclone for separation, and after the separation, titanium-rich material and iron oxide slurry are obtained; the titanium-rich material enters the heavy phase storage tank;

[0040] S5: the titanium-rich material in the heavy phase storage tank is sampled for inspection, and according to the inspection result, the titanium-rich material in the heavy phase storage tank can be selected to be pumped back to the stirring tank; in this embodiment, if the pulp concentration reaches 8-13% and the iron content of the ore body is greater than 10%, the titanium-rich material in the heavy phase storage tank is pumped back to the stirring tank; and the above steps are repeated;

[0041] S6: the iron oxide slurry and the titanium-rich material are collected and treated respectively.

Claims

1. A multi-stage corrosion system for iron-containing minerals, characterized by: It includes a stirring tank, a two-stage bubble corrosion tube group, a three-stage corrosion storage tank, a cyclone and a heavy phase storage tank; the upper part of the stirring tank is provided with a feed main pipe; the two-stage bubble corrosion tube group includes a plurality of bubble spiral tubes; the main body of the bubble spiral tube is a spiral tube structure, and a spiral air tube is provided inside the spiral tube; the side wall of the spiral air tube is provided with a plurality of air outlet holes, the top end of which is closed, and the lower end of the spiral air tube is connected to the positive pressure air pipe; the bubble spiral tube connects the stirring tank and the three-stage corrosion storage tank; the three-stage corrosion storage tank is provided with a discharge pipe, and the discharge pipe is connected to the feed port of the cyclone; the heavy phase discharge port at the lower end of the cyclone is connected to the heavy phase The feed port of the phase storage tank is connected; the two-stage bubble corrosion tube group also includes a support column, which is arranged between the stirring tank and the three-stage corrosion storage tank; the bubble spiral tube is spirally fixed on the support column; the lower end of the bubble spiral tube is connected with the storage tank feed pipe; the lower end of the storage tank feed pipe extends to the bottom of the three-stage corrosion storage tank; a number of the discharge pipes are arranged in a circle along the lower part of the three-stage corrosion storage tank; a connecting air pipe is provided between the stirring tank and the three-stage corrosion storage tank, and an air valve is provided on the connecting air pipe; the heavy phase storage tank is provided with a reflux pipe; the upper end of the reflux pipe is connected with the feed main pipe.

2. The multi-stage corrosion system for iron-containing minerals according to claim 1, characterized in that: The stirring tank is a closed stirring tank; the feed main pipe is provided with a material valve.

3. A multi-stage corrosion method for iron-containing minerals, characterized in that: The multi-stage corrosion system for iron-containing minerals according to any one of claims 1 to 2 comprises: S1: adding iron-containing minerals and acidic rusting liquid into the stirring tank and stirring them into an iron-containing mineral rusting mixed liquid, and introducing oxygen-containing gas into the spiral air pipe during the stirring process, and controlling the air pressure in the stirring tank to be lower than the air pressure in the positive pressure air pipe; bubbles entering the stirring tank from the bubble spiral pipe and the iron-containing mineral rusting mixed liquid undergo a first stage of rusting treatment; S2: The iron-containing mineral corrosion mixture enters the bubble spiral tube and flows spirally downward, and the oxygen-containing gas flows spirally upward from the lower end of the spiral air tube and enters the bubble spiral tube from its outlet, mixing with the iron-containing mineral corrosion mixture flowing downward, performing a two-stage corrosion treatment, and the bubbles formed flow upward into the stirring tank; S3: After the second stage corrosion treatment, the iron-containing mineral corrosion mixture and some bubbles enter the third stage corrosion storage tank for the third stage corrosion treatment; S4: After the three-stage corrosion treatment, the iron-containing mineral corrosion mixture enters the cyclone for separation, and titanium-rich material and iron oxide slurry are obtained after separation; wherein the titanium-rich material enters the heavy phase storage tank; S5: sampling and inspecting the titanium-rich material in the heavy phase storage tank, and pumping the titanium-rich material in the heavy phase storage tank back into the stirring tank according to the inspection results, and repeating the above steps S1 to S4; S6: Collect and process the iron oxide slurry and titanium-rich material separately.

4. The multi-stage corrosion method for iron-containing minerals according to claim 3, characterized in that: In step S5, if the slurry concentration reaches 8-13% and the iron content of the ore body is greater than 10%, the titanium-rich material in the heavy phase storage tank is pumped back into the stirring tank.

Images