CN220968412U - Device for efficiently disposing and utilizing causticized slag - Google Patents
Device for efficiently disposing and utilizing causticized slag Download PDFInfo
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- CN220968412U CN220968412U CN202322810077.2U CN202322810077U CN220968412U CN 220968412 U CN220968412 U CN 220968412U CN 202322810077 U CN202322810077 U CN 202322810077U CN 220968412 U CN220968412 U CN 220968412U
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- tank
- separation
- washing
- washing separation
- underflow
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- 239000002893 slag Substances 0.000 title claims abstract description 19
- 238000000926 separation method Methods 0.000 claims abstract description 80
- 238000005406 washing Methods 0.000 claims abstract description 57
- 238000004062 sedimentation Methods 0.000 claims abstract description 43
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 17
- 230000023556 desulfurization Effects 0.000 claims abstract description 17
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 9
- 238000004537 pulping Methods 0.000 claims abstract description 8
- 238000001704 evaporation Methods 0.000 claims abstract description 7
- 230000008020 evaporation Effects 0.000 claims abstract description 7
- 239000013049 sediment Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 238000009993 causticizing Methods 0.000 abstract description 11
- 239000002699 waste material Substances 0.000 abstract description 11
- 239000002244 precipitate Substances 0.000 abstract description 8
- 238000007599 discharging Methods 0.000 abstract description 7
- 239000011550 stock solution Substances 0.000 abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 7
- 239000002002 slurry Substances 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 238000004131 Bayer process Methods 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 239000008267 milk Substances 0.000 description 3
- 210000004080 milk Anatomy 0.000 description 3
- 235000013336 milk Nutrition 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910001388 sodium aluminate Inorganic materials 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The utility model discloses a device for efficiently disposing and utilizing causticized slag, which comprises a causticized discharging tank, wherein the causticized discharging tank is connected with a separation sedimentation device, the separation sedimentation device is provided with an overflow pipe connected to a decomposition system or an evaporation stock solution system and an underflow calandria connected with a washing separation sedimentation tank group, the tail tank of the washing separation sedimentation tank group is provided with the underflow calandria, the underflow calandria is connected with an abrasive machine, and the abrasive machine is sequentially connected with a pulping tank and a thermoelectric desulfurization tower; the utility model can utilize the precipitate after causticizing separation, can realize the reutilization of waste resources, changes waste into valuable, and reduces the production cost of enterprises.
Description
Technical Field
The utility model relates to a device for efficiently disposing and utilizing causticized slag, and belongs to the technical field of alumina production.
Background
Along with the gradual depletion of bauxite grade, the impurity content in the ore is gradually increased, and particularly the increasing trend of the impurity content of carbonate in the ore is obvious, in the Bayer process alumina production process, the carbonate in the bauxite enters a Bayer process sodium aluminate solution system in a sodium carbonate form, so that the concentration of the sodium carbonate in the sodium aluminate solution is continuously accumulated, and the operation and consumption of the Bayer process alumina production are seriously influenced. In order to alleviate the influence of sodium carbonate on alumina production, salt elimination causticizing treatment is needed, and sodium carbonate obtained by salt elimination is led to form calcium carbonate sediment through lime milk causticizing to be discharged from a Bayer process system, and calcium aluminate is generated in the causticizing process, so that excessive lime milk is generally required to be added, and unreacted lime milk exists in causticized solids. From this, the solid phase material obtained by salt removal causticization is conventionally called causticized slag from a multiphase system of calcium carbonate, calcium sulfate, residual calcium hydroxide and the like. In the existing alumina production process, the discharged slurry of the causticizing tank is separated and settled firstly, and overflows and is led into a decomposition system or an evaporation stock solution system after separation and settlement, and the underflow sediment is sent to a red mud storage yard for storage through a red mud discharging system, so that when the waste is treated, the red mud storage quantity is increased, and meanwhile, the resource waste is caused.
Therefore, a device for efficiently disposing and utilizing causticized slag is needed, solid precipitate after causticization and separation can be utilized, waste resources can be recycled, and waste materials are changed into valuable materials, so that the production cost of enterprises is reduced.
Disclosure of utility model
Therefore, the utility model aims to provide a device for efficiently disposing and utilizing causticized slag, which can utilize solid precipitates after causticization and separation, realize the reutilization of waste resources, change waste into valuable, and reduce the production cost of enterprises; can overcome the defects of the prior art.
The utility model aims at realizing the following technical scheme:
The utility model discloses a device for efficiently disposing and utilizing causticized slag, which comprises a causticized discharging groove, wherein the causticized discharging groove is connected with a separation sedimentation device, the separation sedimentation device is provided with an overflow pipe connected to a decomposition system or an evaporation stock solution system and an underflow calandria connected with a washing separation sedimentation groove group, the tail groove of the washing separation sedimentation groove group is provided with the underflow calandria, the underflow calandria is connected with an abrasive machine, and the abrasive machine is sequentially connected with a pulping groove and a thermoelectric desulfurization tower.
The above-mentioned, the washing separation settling tank in the washing separation settling tank group is equipped with a feeding pipe for conveying the underflow to the next washing separation settling tank and an overflow drain pipe for conveying the overflow to the previous washing separation settling tank, and the feeding pipe and the overflow pipe are respectively equipped with a hydraulic pump.
The tail tank of the washing separation sedimentation tank group is provided with a water adding pipe and an overflow drain pipe, and the overflow drain pipe is sequentially connected to the washing separation head tank of the previous washing separation sedimentation tank.
The filter press is arranged between the separation sedimentation device and the washing separation head tank.
Compared with the prior art, the utility model has the beneficial effects that:
1. The utility model firstly separates and settles the discharged material of the causticizing discharging chute through a separation and settling device, and conveys the overflow of the separation and settling device to a decomposition system or an evaporation stock solution system, and for the precipitate of the separation and settling device, the precipitate is conveyed to a washing and separation and settling tank group for washing and separation and settling, causticizing slag and alkaline liquor are washed and returned to an alumina production flow, causticizing slag substances of a tail tank are processed and finely ground, and then qualified slurry is prepared and conveyed to a thermoelectric desulfurization tower for desulfurization so as to replace the use of thermoelectric desulfurization limestone powder, thus recycling of causticizing slag waste resources can be realized, and the production cost can be reduced.
2. The causticized slag after washing, separating and settling is utilized, so that the waste of resources can be avoided, the storage of the causticized slag in a red mud storage yard can be avoided, and the desulfurization can be performed by combining an alumina production system.
3. The washing separation settling tank in the washing separation settling tank group is provided with a feeding pipe for conveying the underflow to the next washing separation settling tank and an overflow discharge pipe for conveying the overflow to the previous washing separation settling tank, and the feeding pipe and the overflow pipe are respectively provided with a hydraulic pump. The caustic slag is washed and returned to the production flow by reverse washing, separation and sedimentation, so that the alkali loss of the production system is reduced.
4. The calcium carbonate, the calcium oxide and a small amount of attached sodium oxide in the causticized slag are desulfurized through the thermoelectric desulfurization tower, so that limestone powder desulfurization can be completely replaced, and further, the deep fusion utilization of waste resources of an alumina system and the thermoelectric desulfurization system is realized, so that the production cost is reduced.
5. A filter press is arranged between the separation sedimentation device and the washing separation first tank, so that the underflow separated by the separation sedimentation device can be filtered and then sent to the subsequent washing.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in further detail with reference to the accompanying drawings, in which:
Fig. 1 is a schematic diagram of a connection structure according to the present utility model.
Wherein the discharge chute 1 is causticized; a separation sedimentation device 2; washing and separating the sedimentation tank group 3; an underflow calandria 4; a tail groove 5; an abrasive machine 6; a pulping tank 7; a thermoelectric desulfurizing tower 8; washing and separating the first groove 9; a filter press 10.
Detailed Description
Hereinafter, preferred embodiments of the present utility model will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.
As shown in fig. 1, the process for efficiently disposing and utilizing causticized slag disclosed by the utility model is characterized by comprising the following steps:
Step 1, conveying the bottom flow of the causticizing discharge chute 1 to a separation sedimentation device 2 through a pump for sedimentation separation, wherein an overflow pipe of the separation sedimentation device 2 is connected to a decomposition system or an evaporation stock solution system, and the bottom flow of the separation sedimentation device 2 is connected to a washing separation sedimentation tank group 3 for washing separation sedimentation;
step 2, sequentially conveying the underflow to the next washing separation sedimentation tank by the washing separation sedimentation tank in the washing separation sedimentation tank group 3;
Step 3, conveying the underflow precipitate of the tail tank 5 of the washing separation sedimentation tank group to an abrasive machine 6 for fine grinding; adding water into the tail tank 5 of the washing separation sedimentation tank group 3 to perform reverse washing in sequence, and finally merging overflow washing liquid of the washing separation head tank 9 of the washing separation sedimentation tank group 3 into an alumina red mud washing sedimentation system;
Step 4, conveying the materials ground by the grinding machine 6 to a pulping groove 7 for pulping;
And 5, conveying the slurry prepared in the pulping tank 7 to a thermoelectric desulfurization tower 8 for desulfurization.
This structure, the device that the high-efficient disposal utilized of causticization sediment, it includes causticization blown down tank 1, and causticization blown down tank 1 is connected with separation sedimentation device 2, has the overflow pipe that is connected to decomposition system or evaporation stoste system and the underflow calandria 4 of being connected with washing separation sedimentation tank group 3 on separation sedimentation device 2, its characterized in that: the tail tank 5 of the washing separation sedimentation tank group 3 is provided with an underflow calandria 4, the underflow calandria 4 is connected with a grinding machine 6, and the grinding machine 6 is sequentially connected with a pulping tank 7 and a thermoelectric desulfurization tower 8.
Furthermore, a feeding pipe and an overflow drain pipe for conveying the underflow to the next washing separation sedimentation tank are arranged on the washing separation sedimentation tank in the washing separation sedimentation tank group 3, and hydraulic pumps are arranged on the feeding pipe and the overflow drain pipe.
Further, a water supply pipe and an overflow drain pipe are provided in the tail tank 5 of the washing separation settling tank group 3, and the overflow drain pipe is sequentially connected to the previous washing separation tank of the washing separation settling tank group 3 and finally connected to the washing separation head tank 9.
Further, a filter press 10 is provided between the separation settling device 2 and the wash separation head tank 9, so that the underflow separated by the separation settling device 2 can be filtered and then sent to the subsequent wash.
When the alkaline slurry is used, the discharged materials of the causticizing discharging chute 1 are separated and settled through the separation and settlement device 2, the overflow of the separation and settlement device 1 is conveyed to a decomposition system for decomposition and utilization, the precipitate of the separation and settlement device 1 is conveyed to the washing and separation and settlement tank group 3 for washing and separation and settlement, the precipitate with the main component of the tail tank 5 being alkali is ground, then the slurry is prepared, the prepared alkaline slurry is utilized for neutralization and desulfurization with sulfur of the thermoelectric desulfurization tower 8, so that the alkaline can be recovered, and the alkaline slurry can be combined with the thermoelectric desulfurization tower for desulfurization, and the production cost is reduced in an alumina production system with huge flow.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variations and modification made to the above embodiment according to the technical matter of the present utility model without departing from the technical scope of the present utility model still fall within the scope of the technical scheme of the present utility model.
Claims (4)
1. The utility model provides a device that high-efficient disposal utilized of causticization sediment, it includes causticization blown down tank (1), and causticization blown down tank (1) are connected with separation sedimentation device (2), have on separation sedimentation device (2) to be connected to the overflow pipe of decomposition system or evaporation stoste system and with washing separation sedimentation tank group (3) be connected underflow calandria (4), its characterized in that: the tail tank (5) of the washing separation sedimentation tank group (3) is provided with an underflow calandria (4), the underflow calandria (4) is connected with a grinding machine (6), and the grinding machine (6) is sequentially connected with a pulping tank (7) and a thermoelectric desulfurization tower (8).
2. The device for efficiently disposing and utilizing causticized slag according to claim 1, wherein: the washing separation settling tank in the washing separation settling tank group (3) is provided with a feeding pipe and an overflow drain pipe for conveying the underflow to the next washing separation settling tank, and the feeding pipe and the overflow drain pipe are respectively provided with a hydraulic pump.
3. The device for efficiently disposing and utilizing causticized slag according to claim 1, wherein: the tail tank (5) of the washing separation sedimentation tank group (3) is provided with a water adding pipe and an overflow drain pipe, and the overflow drain pipe is sequentially connected to the previous washing separation tank of the washing separation sedimentation tank group (3) and finally connected to the washing separation head tank (9).
4. The device for efficiently disposing and utilizing causticized slag according to claim 1, wherein: a filter press (10) is arranged between the separation sedimentation device (2) and the washing separation head tank (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322810077.2U CN220968412U (en) | 2023-10-19 | 2023-10-19 | Device for efficiently disposing and utilizing causticized slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322810077.2U CN220968412U (en) | 2023-10-19 | 2023-10-19 | Device for efficiently disposing and utilizing causticized slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220968412U true CN220968412U (en) | 2024-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322810077.2U Active CN220968412U (en) | 2023-10-19 | 2023-10-19 | Device for efficiently disposing and utilizing causticized slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220968412U (en) |
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2023
- 2023-10-19 CN CN202322810077.2U patent/CN220968412U/en active Active
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