CN218932250U - Hot dipping tank and device for improving leaching rate of high-temperature roasting rare earth - Google Patents
Hot dipping tank and device for improving leaching rate of high-temperature roasting rare earth Download PDFInfo
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- CN218932250U CN218932250U CN202223110028.XU CN202223110028U CN218932250U CN 218932250 U CN218932250 U CN 218932250U CN 202223110028 U CN202223110028 U CN 202223110028U CN 218932250 U CN218932250 U CN 218932250U
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Abstract
The utility model discloses a hot-dip tank, which comprises a hot-dip tank front section, a hot-dip tank middle section and a hot-dip tank rear section which are sequentially communicated, wherein stirring equipment is respectively arranged at the hot-dip tank front section, the hot-dip tank middle section and the hot-dip tank rear section; the inlet of the screening device is communicated with the middle section of the hot dip tank through a pipeline, the light phase outlet of the screening device is communicated with the rear section of the hot dip tank through a pipeline, and the heavy phase outlet of the screening device is communicated with the middle section of the hot dip tank through a pipeline; the inlet of the crushing device is communicated with the middle section of the hot dipping tank through a pipeline, the outlet of the crushing device is communicated with the front section of the hot dipping tank through a pipeline, and the rear section of the hot dipping tank is used for outputting leached ore pulp liquid. The utility model also discloses a device for improving the leaching rate of the high-temperature roasting rare earth. The utility model can realize continuous and high-efficiency leaching of the roasted ore, shortens the leaching time and reduces the REO content in the externally-deslagging under the premise of ensuring the quality of the water leaching liquid.
Description
Technical Field
The utility model belongs to the field of rare earth hydrometallurgy, and particularly relates to a hot dip tank and a device for improving the leaching rate of high-temperature roasting rare earth.
Background
The Bayan-obo mixed rare earth ore is large in reserve and is known to the world, the treatment process adopts a concentrated sulfuric acid high-temperature roasting and intensified roasting process, and the treated roasted ore is subjected to water leaching, neutralization, impurity removal and washing to form water leaching liquid and waste residues. At present, a large amount of roasted ores and leaching solutions are subjected to operations such as repeated pulp mixing, multistage continuous leaching, more than four times of solid-liquid separation and the like, REO (rare earth element oxide) leaching is realized, the time consumption is 4-5 hours, and the problems of low efficiency and high energy consumption exist. In recent years, along with the continuous improvement of environmental protection and energy consumption requirements of China, various rare earth smelting enterprises have started to comprehensively evaluate and optimize process links, for example, the filtering equipment of a water leaching process is upgraded and modified from an original box-type filter press to a self-cleaning surface filter, about 60-70% sulfuric acid recovered by an exhaust gas treatment system is recycled to a roasting process, waste water generated in the conversion process is recycled to the water leaching process, but the problems of reduced concentration of water leaching, increased REO content in external slag discharge, increased non-rare earth impurity content in water leaching solution and reduced leaching rate occur in the process.
Disclosure of Invention
The utility model aims to provide a hot dipping tank and a device for improving the leaching rate of high-temperature roasting rare earth, which can realize continuous and efficient leaching of roasted ores, shorten the leaching time and reduce the REO content in external slag discharge on the premise of ensuring the quality of leaching liquid.
In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
the hot-dip tank comprises a hot-dip tank front section, a hot-dip tank middle section and a hot-dip tank rear section which are sequentially communicated, wherein stirring equipment is respectively arranged at the hot-dip tank front section, the hot-dip tank middle section and the hot-dip tank rear section; the inlet of the screening device is communicated with the middle section of the hot dip tank through a pipeline, the light phase outlet of the screening device is communicated with the rear section of the hot dip tank through a pipeline, and the heavy phase outlet of the screening device is communicated with the middle section of the hot dip tank through a pipeline; the inlet of the crushing device is communicated with the middle section of the hot dipping tank through a pipeline, the outlet of the crushing device is communicated with the front section of the hot dipping tank through a pipeline, and the rear section of the hot dipping tank is used for outputting leached ore pulp liquid.
Further, the hot-dip tank comprises 1-N level hot-dip tank monomers, the 1-N level hot-dip tank monomers are sequentially communicated, the front section of the hot-dip tank, the middle section of the hot-dip tank and the rear section of the hot-dip tank respectively comprise at least one level of hot-dip tank monomers, and N is a natural number.
Further, an inlet of the screening device is communicated with any one stage of hot-dip tank monomer in the middle section of the hot-dip tank through a pipeline, a light phase outlet of the screening device is communicated with any one stage of hot-dip tank monomer in the rear section of the hot-dip tank through a pipeline, and a heavy phase outlet of the screening device is communicated with any one stage of hot-dip tank monomer in the middle section of the hot-dip tank through a pipeline; the inlet of the crushing device is communicated with any one stage of hot-dip tank monomer in the middle section of the hot-dip tank through a pipeline, and the outlet is communicated with any one stage of hot-dip tank monomer in the front section of the hot-dip tank through a pipeline.
Further, the hot dip tank monomer connected to the heavy phase outlet is located at the upper stage of the hot dip tank monomer connected to the inlet of the crushing apparatus.
Further, the crushing apparatus includes: the crushing device comprises a crushing pump, a ball mill and a crusher, wherein an inlet of the crushing pump is communicated with any one stage of hot dip tank monomer in the middle section of the hot dip tank through a pipeline, an outlet of the crushing pump is connected with an inlet of the crusher through a pipeline, a discharge port of the crusher is connected with an inlet of the ball mill through a pipeline, and a discharge port of the ball mill is connected with any one stage of hot dip tank monomer in the front section of the hot dip tank through a pipeline.
The device for improving the leaching rate of the high-temperature roasting rare earth is characterized in that the rear section of the hot dipping tank is connected with solid-liquid separation equipment through a pipeline, a liquid outlet of the solid-liquid separation equipment is connected with neutralization impurity removal equipment through a pipeline, and a slag outlet of the solid-liquid separation equipment is connected with slag washing equipment through a pipeline.
Preferably, the slag outlet of the solid-liquid separation device is provided with a screw feeder, and the discharge outlet of the screw feeder is communicated with the slag washing device.
The technical effects of the utility model include:
under the condition of utilizing the existing hot dipping tank, the continuous and efficient leaching of the roasted ore is realized through the introduction of new equipment and the optimized control of the process, the leaching time is shortened and the REO content in the externally-deslagging is reduced on the premise of ensuring the quality of the leaching liquid.
The technical effects are as follows in combination with the technical and equipment structure description:
1. the screening equipment with strong wear resistance and corrosion resistance is added in the hot dipping tank, and the light phase ore slurry is mainly small particles after the separation of the large and small particles in the ore slurry, and the REO content in the light phase solid reaches the end point index of the next leaching process, so that the solid-liquid separation operation can be directly carried out;
2. after the large particles separated by screening are crushed by crushing equipment, the particles become obviously smaller, and the dissolution rate of the inner particles is greatly improved;
3. the application of the new equipment and the improvement of the process control realize that the hot dipping time is shortened to 1.2 to 1.5 hours from the original 2 to 2.5 hours, the leaching efficiency is greatly improved, and the average content of soluble REO in the external slag is reduced to 0.32 percent from the original 1.33 percent.
Drawings
FIG. 1 is a schematic diagram of the structure of the device for improving the leaching rate of high-temperature roasting rare earth in the utility model.
Detailed Description
The following description fully illustrates the specific embodiments of the utility model to enable those skilled in the art to practice and reproduce it.
As shown in FIG. 1, the utility model is a structural schematic diagram of a device for improving the leaching rate of high-temperature roasting rare earth.
Device for improving leaching rate of high-temperature roasting rare earth, comprising: a hot dipping tank 1, screening equipment 2, crushing equipment 3, solid-liquid separation equipment 4, neutralization and impurity removal equipment 5 and slag washing equipment 6; the hot-dip tank 1 comprises a hot-dip tank front section 11, a hot-dip tank middle section 12 and a hot-dip tank rear section 13 which are sequentially communicated, wherein stirring equipment 14 is respectively arranged at the hot-dip tank front section 11, the hot-dip tank middle section 12 and the hot-dip tank rear section 13; the inlet of the screening device 2 is communicated with the middle section 12 of the hot dip tank through a pipeline, the light phase outlet of the screening device 2 is communicated with the rear section 13 of the hot dip tank through a pipeline, and the heavy phase outlet of the screening device 2 is communicated with the middle section 12 of the hot dip tank through a pipeline; the inlet of the crushing device 3 is communicated with the middle section 12 of the hot dip tank through a pipeline, and the outlet is communicated with the front section 11 of the hot dip tank through a pipeline; the rear section 13 of the hot dip tank is connected with the solid-liquid separation equipment 4 through a pipeline, a liquid outlet of the solid-liquid separation equipment 4 is connected with the neutralization and impurity removal equipment 5 through a pipeline, and a slag outlet is communicated with the slag washing equipment 6 through a pipeline.
The hot dip tank 1 is used for leaching rare earth elements in rare earth roasting ores and comprises 1-N level hot dip tank monomers, the 1-N level hot dip tank monomers are sequentially communicated, and the front section 11, the middle section 12 and the rear section 13 of the hot dip tank respectively comprise at least one level of hot dip tank monomers.
The screening device 2 is internally provided with a cyclone flow divider, a rotary screen, a vibrating screen and other devices with screening functions, the light-phase ore slurry is mainly composed of small particles, the light-phase ore slurry is output from a light-phase outlet, and the heavy-phase ore slurry is output from a heavy-phase outlet. The screening device 2 is used for separating large-particle materials in the ore slurry, the inlet of the screening device 2 can be communicated with any one stage of hot-dip tank monomer in the middle section 12 of the hot-dip tank through a pipeline, the light phase outlet of the screening device 2 can be communicated with any one stage of hot-dip tank monomer in the rear section 13 of the hot-dip tank through a pipeline, and the heavy phase outlet can be communicated with any one stage of hot-dip tank monomer in the middle section 12 of the hot-dip tank through a pipeline; the inlet of the crushing device 3 can be communicated with any one stage of hot dip tank monomer of the middle section 12 of the hot dip tank through a pipeline, and the outlet can be communicated with any one stage of hot dip tank monomer of the front section 11 of the hot dip tank through a pipeline. The hot dip tank monomer connected to the heavy phase outlet is located at the upper stage of the hot dip tank monomer connected to the inlet of the crushing apparatus 3.
The crushing apparatus 3 is a continuous wet crushing apparatus for crushing solid particles in a slurry, and its structure includes: crushing pump, ball mill, crusher (jaw crusher, cone crusher, hammer crusher, roller crusher) and other equipment with crushing function. The inlet of the crushing pump can be communicated with any one stage of hot dip tank monomer of the hot dip tank middle section 12 through a pipeline, the outlet of the crushing pump is connected with the inlet of the crusher through a pipeline, the discharge port of the crusher is connected with the inlet of the ball mill through a pipeline, and the discharge port of the ball mill is connected with any one stage of hot dip tank monomer of the hot dip tank front section 11 through a pipeline.
A spiral feeder can be arranged between the solid-liquid separation equipment 4 and the slag washing equipment 6, a slag outlet of the solid-liquid separation equipment 4 is provided with a feed inlet of the spiral feeder, and a discharge outlet of the spiral feeder is communicated with the slag washing equipment 6.
The method for improving the leaching rate of the high-temperature roasting rare earth comprises the following specific steps:
step 1: the rare earth roasting ore solid particles (the rare earth content is 30% -36%, the shape is in a sphere shape with different sizes) obtained after the rare earth concentrate is roasted at high temperature by concentrated sulfuric acid are sent to the front section 11 of the hot dipping tank, and meanwhile, according to the following steps of 1:6-1:10 solid-liquid ratio is injected into production reuse water (ammonium sulfate reuse water or magnesium sulfate reuse water), and the rare earth roasting ore solid particles and the production reuse water are dissolved and stirred to obtain ore slurry;
step 2: the ore pulp liquid is pumped from the middle section 12 of the hot dipping tank and enters the screening equipment 2 with strong wear-resisting and corrosion-resisting properties, the size particles in the ore pulp liquid are separated through the screening action, the heavy phase ore pulp liquid flows into the middle section 12 of the hot dipping tank again, and the light phase ore pulp liquid flows into the rear section 13 of the hot dipping tank; ,
step 3: the ore pulp liquid in the middle section 12 of the hot dip tank is crushed by the crushing equipment 3 and then returns to the front section 11 of the hot dip tank;
step 4: the ore pulp liquid after continuous leaching (1-N level) is pumped into a solid-liquid separation device 4 from a rear section 13 of the hot dipping tank, the water phase after solid-liquid separation enters the next working procedure, and the solid phase is subjected to slag washing and filtering treatment to obtain the external slag discharge with lower REO content which meets the technological requirements.
The ore slurry is pumped into a solid-liquid separation device 4, and the water phase after solid-liquid separation enters a neutralization and impurity removal device 5 for impurity removal, and the water phase after impurity removal forms rare earth water immersion liquid; the solid phase after solid-liquid separation enters slag washing equipment 6 for washing to form waste slag.
Example 1
Rare earth roasting ore REO:32.43%, the roasting temperature is 210 ℃, the hot dipping tank 1 is 10 grades (N=10), the discharge amount of the rare earth roasting ore is determined by the feeding amount of the rotary kiln, and the rare earth roasting ore and the reuse water are mixed according to the following ratio of 1:8 firstly enter the front section 11 of the hot dip tank, ore pulp liquid is pumped out from the middle section 12 of the hot dip tank and enters the screening equipment 2 with strong wear resistance and corrosion resistance, heavy phase ore pulp liquid after screening action flows into the front section 11 of the hot dip tank, and light phase ore pulp liquid flows into the rear section 13 of the hot dip tank. The heavy phase ore slurry in the middle section 12 of the hot dipping tank enters the crushing equipment 3, the heavy phase ore slurry returns to the front section 11 of the hot dipping tank through the crushing effect, the hot dipping time is 1.3h, the ore slurry after hot dipping enters the solid-liquid separation equipment 4, the solid phase after solid-liquid separation is subjected to slag washing and filtering operation, the content of soluble rare earth REO in the external slag discharge is 0.34%, the water phase enters the neutralization and impurity removal process, and the REO content of the water leaching solution obtained after MgO neutralization and impurity removal is 36.66g/L.
Example 2
Rare earth roasting ore REO:33.56%, the roasting temperature is 230 ℃, the hot dip tank 1 is 10 grades, the discharge amount of the rare earth roasting ore is determined by the ore feeding amount of the rotary kiln, the rare earth roasting ore and the reuse water firstly enter the front section 11 of the hot dip tank according to the ratio of 1:9, ore pulp liquid is pumped out from the middle section 12 of the hot dip tank and enters the screening equipment 2 with strong wear-resisting and corrosion-resisting properties, heavy phase ore pulp liquid after screening flows into the front section 11 of the hot dip tank, and light phase ore pulp liquid flows into the rear section 13 of the hot dip tank. The heavy phase ore slurry in the middle section 12 of the hot dipping tank enters the crushing equipment 3, the heavy phase ore slurry returns to the front section 11 of the hot dipping tank under the action of crushing, the hot dipping time is 1.5h, the slurry after hot dipping enters the solid-liquid separation equipment 4, the solid phase after solid-liquid separation is subjected to slag washing and filtering operation, the content of soluble rare earth REO in the external slag discharge is 0.53%, the water phase enters the neutralization and impurity removal process, and the REO content of the water immersion liquid obtained after MgO neutralization and impurity removal is 35.53g/L.
Example 3
Rare earth roasting ore REO:33.25%, the temperature is 235 ℃, the hot dipping tank 1 is 10 grades, the discharge amount of the rare earth roasting ore is determined by the ore feeding amount of the rotary kiln, the rare earth roasting ore and the reuse water firstly enter the front section 11 of the hot dipping tank according to the ratio of 1:10, ore pulp liquid is pumped out from the middle section 12 of the hot dipping tank and enters the screening equipment 2 with strong wear-resisting and corrosion-resisting properties, heavy phase ore pulp after screening flows into the rear section of the hot dipping tank, and light phase flows into the rear section 13 of the hot dipping tank. The heavy phase ore slurry in the middle section 12 of the hot dipping tank enters the crushing equipment 3, the heavy phase ore slurry returns to the front section 11 of the hot dipping tank under the action of the crushing equipment, the hot dipping time is 1.4h, the slurry after hot dipping enters the solid-liquid separation equipment 4, the solid phase after solid-liquid separation is subjected to slag washing and filtering operation, the content of soluble rare earth REO in the external slag discharge is 0.43%, the water phase enters the neutralization and impurity removal process, and the REO content of the water immersion liquid obtained after MgO neutralization and impurity removal is 35.21g/L.
The terminology used herein is for the purpose of description and illustration only and is not intended to be limiting. As the present utility model may be embodied in several forms without departing from the spirit or essential attributes thereof, it should be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalences of such metes and bounds are therefore intended to be embraced by the appended claims.
Claims (7)
1. The hot-dip tank is characterized by comprising a hot-dip tank front section, a hot-dip tank middle section and a hot-dip tank rear section which are sequentially communicated, wherein stirring equipment is respectively arranged at the hot-dip tank front section, the hot-dip tank middle section and the hot-dip tank rear section; the inlet of the screening device is communicated with the middle section of the hot dip tank through a pipeline, the light phase outlet of the screening device is communicated with the rear section of the hot dip tank through a pipeline, and the heavy phase outlet of the screening device is communicated with the middle section of the hot dip tank through a pipeline; the inlet of the crushing device is communicated with the middle section of the hot dipping tank through a pipeline, the outlet of the crushing device is communicated with the front section of the hot dipping tank through a pipeline, and the rear section of the hot dipping tank is used for outputting leached ore pulp liquid.
2. The hot-dip tank according to claim 1, wherein the hot-dip tank comprises 1-N stage hot-dip tank monomers, the 1-N stage hot-dip tank monomers are sequentially connected, and the front stage, the middle stage and the rear stage of the hot-dip tank respectively comprise at least one stage of hot-dip tank monomers, wherein N is a natural number.
3. The hot dip tank as claimed in claim 2, wherein the inlet of the screening device is communicated with any one of the hot dip tank monomers in the middle section of the hot dip tank through a pipeline, the light phase outlet of the screening device is communicated with any one of the hot dip tank monomers in the rear section of the hot dip tank through a pipeline, and the heavy phase outlet of the screening device is communicated with any one of the hot dip tank monomers in the middle section of the hot dip tank through a pipeline; the inlet of the crushing device is communicated with any one stage of hot-dip tank monomer in the middle section of the hot-dip tank through a pipeline, and the outlet is communicated with any one stage of hot-dip tank monomer in the front section of the hot-dip tank through a pipeline.
4. A hot dip tank as claimed in claim 3, wherein the hot dip tank cell to which the heavy phase outlet is connected is located at a previous stage of the hot dip tank cell to which the inlet of the crushing apparatus is connected.
5. A hot dip tank according to claim 3, wherein the crushing plant comprises: the crushing device comprises a crushing pump, a ball mill and a crusher, wherein an inlet of the crushing pump is communicated with any one stage of hot dip tank monomer in the middle section of the hot dip tank through a pipeline, an outlet of the crushing pump is connected with an inlet of the crusher through a pipeline, a discharge port of the crusher is connected with an inlet of the ball mill through a pipeline, and a discharge port of the ball mill is connected with any one stage of hot dip tank monomer in the front section of the hot dip tank through a pipeline.
6. The device for improving the leaching rate of the high-temperature roasting rare earth by using the hot dip tank according to any one of claims 1 to 5, wherein the rear section of the hot dip tank is connected with a solid-liquid separation device through a pipeline, a liquid outlet of the solid-liquid separation device is connected with a neutralization and impurity removal device through a pipeline, and a slag outlet of the solid-liquid separation device is connected with a slag washing device through a pipeline.
7. The apparatus for increasing leaching rate of rare earth by high temperature roasting according to claim 6, wherein the slag outlet of the solid-liquid separation device is provided with a screw feeder, and the discharge outlet of the screw feeder is communicated with the slag washing device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223110028.XU CN218932250U (en) | 2022-11-23 | 2022-11-23 | Hot dipping tank and device for improving leaching rate of high-temperature roasting rare earth |
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| CN202223110028.XU CN218932250U (en) | 2022-11-23 | 2022-11-23 | Hot dipping tank and device for improving leaching rate of high-temperature roasting rare earth |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115725868A (en) * | 2022-11-23 | 2023-03-03 | 包头华美稀土高科有限公司 | Hot dipping tank, device and method for improving leaching rate of high-temperature roasting rare earth |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115725868A (en) * | 2022-11-23 | 2023-03-03 | 包头华美稀土高科有限公司 | Hot dipping tank, device and method for improving leaching rate of high-temperature roasting rare earth |
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