CN211470801U - Titanium white powder continuous acidolysis premixing metering device - Google Patents
Titanium white powder continuous acidolysis premixing metering device Download PDFInfo
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- CN211470801U CN211470801U CN201922146660.1U CN201922146660U CN211470801U CN 211470801 U CN211470801 U CN 211470801U CN 201922146660 U CN201922146660 U CN 201922146660U CN 211470801 U CN211470801 U CN 211470801U
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Abstract
The utility model relates to the technical field of titanium white production equipment, in particular to a titanium white continuous acidolysis premixing metering device, which comprises a mineral powder storage tank, a mineral powder weighing metering tank, a screw conveyer, an acid ore premixing tank, a continuous acidolysis reactor, a dissolving tank, a dilute waste acid storage tank and a 98 percent sulfuric acid storage tank; the mineral powder weighing and metering tanks are respectively arranged below the mineral powder storage tanks and are respectively connected with the screw conveyer, the screw conveyer and the 98% sulfuric acid storage tank are respectively connected with the acid ore premixing tank, the acid ore premixing tank is connected with the continuous acidolysis reactor, two ends of the continuous acidolysis reactor are respectively connected with the dissolving tank, and the continuous acidolysis reactor is connected with the dilute waste acid storage tank through a pipeline. The titanium dioxide continuous acidolysis premixing metering device can effectively control the acid-mineral ratio and the concentration of reaction acid in the sulfuric acid method titanium dioxide acidolysis process, thereby achieving the purpose of continuous acidolysis and stable production.
Description
Technical Field
The utility model relates to a titanium white powder production facility technical field, concretely relates to titanium white powder continuous acidolysis mixes metering device in advance.
Background
At present, two processes for industrially producing titanium dioxide exist: chloride and sulfate processes. The chlorination process is quite complex in technology, high in requirements on equipment materials and automatic control level, only a few countries master the technology at present, the research and development technical difficulty is high, the equipment investment cost is high, and therefore the sulfuric acid process is basically adopted in China to produce the titanium dioxide. The main process for producing titanium dioxide by a sulfuric acid method comprises the following steps: carrying out acidolysis reaction on ilmenite powder and concentrated sulfuric acid to produce titanyl sulfate, hydrolyzing to generate metatitanic acid, and calcining and crushing the metatitanic acid to obtain a titanium dioxide product.
The acidolysis is a core process in the production of titanium dioxide by a sulfuric acid method, and the current acidolysis process comprises intermittent acidolysis in an acidolysis pot and continuous acidolysis in a reactor after acid ore premixing. The key index control of the acidolysis reaction is the proportion of sulfuric acid and ilmenite, the concentration of reaction acid is controlled, and the intermittent acidolysis is static metering, namely liquid sulfuric acid and dilution water for initiation can be calculated according to the volume of a storage tank, and the ilmenite and the measured sulfuric acid are added into the acidolysis tank together with a fixed amount of the storage tank with a weighing sensor, so that the accurate metering can be easily achieved. Continuous acidolysis needs continuous and random metering of the amount of materials added into a reactor because continuous feeding, and domestic manufacturers respectively meter concentrated sulfuric acid and mineral powder according to an intermittent acidolysis constant volume and a constant volume, then add the concentrated sulfuric acid and the mineral powder into a premixing tank to be fully mixed, and then convey the mixture into a continuous reactor to initiate reaction by dilution water. The other mode is continuous metering, concentrated sulfuric acid is directly added into a premixing tank under the control of an electromagnetic flow meter, mineral powder is conveyed into the premixing tank in a storage tank through a screw machine, the screw machine is provided with a weighing sensor, the weight of the mineral powder in the screw machine is metered in a quantitative mode, the rotating speed of the screw machine is controlled through a DCS or PLC system to control the amount of the mineral powder added into the premixing tank, a stable acid-mineral mixture is obtained by controlling the quantitative concentrated sulfuric acid and the mineral powder to be added into the premixing tank and continuously overflowed into an acidolysis reactor, the acidolysis reaction is participated in, however, ilmenite powder is metered in a screw machine dynamic mode, the fineness and the mineral source change of ilmenite sometimes affect the fluidity of the mineral powder, even if the weighing amount and the rotating speed of the screw machine are unchanged, the weight actually added into.
Disclosure of Invention
The utility model aims at overcoming prior art's is not enough, provides a titanium white powder acidolysis in succession mixes metering device in advance, adopts the device can be in sulfuric acid process titanium white powder acidolysis process effectual control acid ore ratio and the concentration of reaction acid to reach the purpose of continuous acidolysis stable production.
In order to achieve the above object, the utility model adopts the following technical scheme:
a titanium dioxide continuous acidolysis premixing metering device comprises a mineral powder storage tank, a mineral powder weighing metering tank, a screw conveyor, an acid ore premixing tank, a continuous acidolysis reactor, a dissolving tank, a dilute waste acid storage tank and a 98% sulfuric acid storage tank; the mineral powder weighing and metering tanks are respectively installed below the mineral powder storage tanks through pipeline connection, the two mineral powder weighing and metering tanks are respectively connected with the screw conveyer, the screw conveyer and the 98% sulfuric acid storage tank are respectively connected with the acid ore premixing tank, the acid ore premixing tank is connected with the continuous acidolysis reactor, two ends of the continuous acidolysis reactor are respectively connected with the dissolving tank, and the continuous acidolysis reactor is connected with the dilute waste acid storage tank through a pipeline.
According to the titanium dioxide continuous acidolysis premixing metering device, the star-shaped discharge valve is arranged between the mineral powder storage tank and the connecting pipeline of the mineral powder weighing metering tanks, and each mineral powder weighing metering tank controls feeding through the star-shaped discharge valve.
According to the titanium dioxide continuous acidolysis premixing metering device, the pneumatic gate valve is installed at the bottom of the mineral powder weighing metering tank, and the mineral powder weighing metering tank is controlled to discharge materials to the screw conveyer through the pneumatic gate valve.
According to the titanium dioxide continuous acidolysis premixing metering device, the 98% sulfuric acid storage tank is connected with the acid ore premixing tank through the pipeline, the electromagnetic flowmeter is installed on the connected pipeline, and sulfuric acid with the mass concentration of 98% is directly added into the acid ore premixing tank through metering control of the electromagnetic flowmeter.
The titanium dioxide continuous acidolysis premixing metering device is characterized in that an electromagnetic flow meter is mounted on a pipeline connected with the continuous acidolysis reactor and the dilute waste acid storage tank, and the dilute waste acid is metered and added into the continuous acidolysis reactor through the electromagnetic flow meter.
The titanium dioxide continuous acidolysis premixing metering device is characterized in that a flue gas outlet is formed in the continuous acidolysis reactor and used for discharging flue gas generated during acidolysis reaction, and a process water inlet is formed in the continuous acidolysis reactor and the dissolving tank.
The utility model has the advantages that:
the utility model provides a pair of continuous acidolysis of titanium white powder mixes metering device in advance combines static measurement and continuous reinforced advantage, adopts concentrated sulfuric acid and rare spent acid priming solution all to measure with electromagnetic flowmeter, and the mineral powder is with the static measurement of weighing sensor and continuous feeding to the mode of sour ore premixing groove, and during the sour ore was carried the continuous acidolysis reactor of main reactor through the fully stirred overflow of sour ore premixing groove, reached the purpose of stable control sour ore ratio and reaction acid concentration, adopted the utility model provides a continuous acidolysis of titanium white powder mixes metering device in advance can effectual control sour ore ratio and reaction acid's concentration in sulfuric acid method titanium white powder acidolysis process to reach the purpose of continuous acidolysis stable production.
Drawings
FIG. 1 is a schematic structural view of the titanium dioxide continuous acidolysis premixing metering device of the present invention;
the reference numbers and names in the figures are as follows:
1. the device comprises a mineral powder storage tank, 2 mineral powder weighing and metering tanks, 3 a screw conveyor, 4 an acid ore premixing tank, 5 a continuous acidolysis reactor, 6 a dissolving tank, 7 a dilute waste acid storage tank, 8 and 98 percent sulfuric acid storage tanks, 9 an electromagnetic flowmeter, 10 a star-shaped discharge valve, 11 a pneumatic gate valve.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following describes the technical solutions of the present invention in further detail with reference to the accompanying drawings and embodiments.
Example 1
The utility model relates to a titanium white powder continuous acidolysis mixes metering device in advance's schematic structure is shown in fig. 1, can see from fig. 1, a titanium white powder continuous acidolysis mixes metering device in advance, and it includes powdered ore storage tank 1, powdered ore weighing and metering tank 2, screw conveyer 3, acid ore premixing groove 4, continuous acidolysis reactor 5, dissolving tank 6, dilute spent acid storage tank 7 and 98% sulphuric acid storage tank 8; the mineral powder weighing and measuring tanks 2 are respectively arranged below the mineral powder storage tanks 1 through pipeline connection, the two mineral powder weighing and measuring tanks 2 are respectively connected with the screw conveyer 3, the screw conveyer 3 and the 98% sulfuric acid storage tank 8 are respectively connected with the acid ore premixing tank 4, the acid ore premixing tank 4 is connected with the continuous acidolysis reactor 5, two ends of the continuous acidolysis reactor 5 are respectively connected with the dissolving tank 6, and the continuous acidolysis reactor 5 and the dilute waste acid storage tank 7 are connected through pipelines. The continuous acidolysis reactor 5 is provided with a flue gas outlet for discharging flue gas generated during acidolysis reaction, and the continuous acidolysis reactor 5 and the dissolving tank 6 are both provided with a process water inlet.
In the titanium dioxide continuous acidolysis premixing metering device, a star-shaped discharge valve 10 is arranged between connecting pipelines of the mineral powder storage tank 1 and the mineral powder weighing metering tank 2, and each mineral powder weighing metering tank controls feeding through the star-shaped discharge valve 10; the bottom of the mineral powder weighing and metering tank 2 is provided with a pneumatic gate valve 11, and the mineral powder weighing and metering tank 2 is controlled to discharge onto the screw conveyor 3 through the pneumatic gate valve 11. The 98% sulfuric acid storage tank 8 is connected with the acid ore premixing tank 4 through a pipeline, an electromagnetic flowmeter 9 is installed on the connected pipeline, and the 98% sulfuric acid is directly added into the acid ore premixing tank 4 through the metering control of the electromagnetic flowmeter 9. The pipeline connected with the continuous acidolysis reactor 5 and the dilute waste acid storage tank 7 is provided with an electromagnetic flowmeter 9, and the dilute waste acid is metered and controlled by the electromagnetic flowmeter 9 and added into the continuous acidolysis reactor 5.
As shown in figure 1, use the utility model discloses continuous acidolysis of titanium white powder mixes metering device in advance when mixing metering processing to the continuous acidolysis of titanium white powder in advance, specifically as follows:
firstly, ilmenite powder obtained after crushing in a milling workshop is conveyed to a mineral powder storage tank 1 to be stored, the ilmenite powder is controlled to be fed into two small mineral powder weighing metering tanks 2 arranged below the mineral powder storage tank 1 through an electric star-shaped discharge valve 10, the feeding amount of each mineral powder weighing metering tank is controlled through the electric star-shaped discharge valve 10, and when the mineral powder weighing metering tanks reach the set weight, a weighing instrument sends a stop signal to the star-shaped discharge valve to stop feeding, so that the feeding amount is accurately metered.
And (II) the two mineral powder weighing metering tanks 2 are respectively connected with the screw conveyer 3, and the two mineral powder weighing metering tanks 2 can continuously and alternately carry out metering and discharging. The bottom of the mineral powder weighing and metering tank 2 is provided with a pneumatic gate valve 11, ilmenite powder is discharged onto the screw conveyor 3 under the control of the pneumatic gate valve 11 and conveyed into the acid ore premixing tank 4 by the screw conveyor, the discharging control mode is time control, by adjusting the rotating speed control time of the screw conveyor, after the mineral powder weighing and metering tank finishes discharging, the pneumatic gate valve 11 is closed, the feeding star-shaped discharging valve 10 is started to weigh and wait for the next discharging period, simultaneously starting another mineral powder weighing and metering tank to start discharging, adopting a DCS control system to access and control the rotating speed of the screw conveyer, and then the cycle period of alternately loading and unloading the two metering tanks is controlled, if the ore consumption is required to be changed, the feeding stopping upper limit of the mineral powder weighing metering tank is correspondingly changed, and the rotating speed of the screw conveyor 3 is correspondingly finely adjusted, so that the aim of continuously and stably feeding the mineral powder into the acid ore premixing tank 4 is fulfilled.
And thirdly, a 98% sulfuric acid storage tank 8 is connected with the acid ore premixing tank 4 through a pipeline, an electromagnetic flowmeter 9 is installed on the pipeline, 98% sulfuric acid is directly added into the acid ore premixing tank 4 through the metering control of the electromagnetic flowmeter 9, ilmenite powder is conveyed and added into the acid ore premixing tank 4 through a screw conveyor 3 to be mixed with the 98% sulfuric acid, the acid ore premixing tank 4 is connected with a continuous acidolysis reactor 5, the 98% sulfuric acid and the ilmenite powder are fully mixed through a stirring paddle installed in the acid ore premixing tank 4 to obtain an acid ore mixture, and the obtained acid ore mixture is continuously overflowed and conveyed into the continuous acidolysis reactor 5.
(IV) both ends of continuous acidolysis reactor 5 are connected with dissolving tank 6 respectively, and the upper end of continuous acidolysis reactor 5 is equipped with the exhanst gas outlet for discharge acidolysis reaction produced flue gas, and continuous acidolysis reactor 5 and dissolving tank 6 all are equipped with the process water entry. The continuous acidolysis reactor 5 is connected with a dilute waste acid storage tank 7 through a pipeline, an electromagnetic flowmeter 9 is arranged on the pipeline, dilute waste acid is metered and controlled by the electromagnetic flowmeter 9 to be added into the continuous acidolysis reactor 5, the added dilute waste acid dilutes 98 percent sulfuric acid in the acidolysis reactor, the ore pulp temperature is raised by the dilution heat of the 98 percent sulfuric acid, ilmenite powder reacts with the sulfuric acid under the initiation of the dilute waste acid, wherein titanium dioxide in the ilmenite is decomposed to form titanyl sulfate, the reaction is an exothermic reaction, the temperature of the material is rapidly raised by the heat released by the reaction and further accelerates the acidolysis reaction, the reaction material is solidified into a powdery substance along with the acidolysis reaction, the powdery substance is slowly cured under the stirring of a spiral stirrer arranged in the continuous acidolysis reactor 5 until reaching two ends of the reactor and then enters a dissolving tank 6 for dissolving, and obtaining titanium liquid after dissolution, and sending the titanium liquid to the next working procedure.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above embodiments, and the changes, modifications, additions or replacements made within the scope of the present invention shall all belong to the protection scope of the present invention.
Application examples
The applicant of the present invention adopts the titanium dioxide continuous acidolysis premixing metering device to perform premixing metering treatment on the titanium dioxide continuous acidolysis, specifically as follows:
according to the amount of about 10t/h of ore used for continuous decomposition of the company, ilmenite is crushed by a grinding workshop and then is sent to a workshop mineral powder storage tank 1 for storage, two small mineral powder weighing metering tanks 2 arranged below the mineral powder storage tank 1 are used for continuously and alternately metering and discharging, the feeding amount can be accurately metered, each metering tank controls the feeding amount to be 333 kg/time through an electric star-shaped discharge valve 10, and a weighing instrument sends a stop signal to a discharge valve to stop feeding when the set weight is reached.
The bottom of a mineral powder weighing and metering tank 2 is provided with a pneumatic gate valve 11 for controlling discharging to a screw conveyor 3, the mineral powder is added into an acid ore premixing tank 4 by the screw conveyor and mixed with concentrated sulfuric acid, the discharging control mode is time control, discharging is finished within 2 minutes each time by adjusting the rotating speed of the screw conveyor, then the pneumatic gate valve is closed, a feeding star-shaped valve 10 is started for feeding and weighing for waiting for the next discharging period, another mineral powder weighing and metering tank is started for discharging, the continuous acidolysis DCS control system is connected for control, the two mineral powder weighing and metering tanks alternately charge and discharge for 15 times per hour, if the feeding stop upper limit of the small metering tank is changed correspondingly by changing the ore quantity, the rotating speed of the screw conveyor is correspondingly finely adjusted, the aim of uninterruptedly and stably adding the mineral powder into the acid ore premixing tank is achieved, and ten seconds of empty time can be reserved each time for ensuring the complete discharging of the small metering tank, the acid ore premixing groove has a certain buffering effect and does not influence the acid ore ratio.
98 percent of sulfuric acid is directly added into an acid ore premixing tank 4 through the metering control of an electromagnetic flowmeter 9, ilmenite powder is conveyed and added into the acid ore premixing tank 4 through a screw conveyor 3 to be mixed with the 98 percent of sulfuric acid, the 98 percent of sulfuric acid and the ilmenite powder are fully mixed in the acid ore premixing tank 4 through an installed stirring paddle to obtain an acid ore mixture, the obtained acid ore mixture is continuously overflowed and conveyed into a continuous acidolysis reactor 5, and the amount of the acid ore mixture overflowed into the acidolysis reactor is determined by the amount of the sulfuric acid and the ore powder which are quantitatively added.
Dilute waste acid is metered and controlled by an electromagnetic flowmeter 9 and is added into a continuous acidolysis reactor 5, 98% sulfuric acid in the acidolysis reactor is diluted by the added dilute waste acid, the ore pulp temperature is raised by diluting and releasing heat through the 98% sulfuric acid, ilmenite powder and sulfuric acid react under the initiation of the dilute waste acid, titanium dioxide in the ilmenite is decomposed to form titanyl sulfate, the reaction is an exothermic reaction, the temperature of the material is rapidly raised by the heat released by the reaction, the acidolysis reaction is further accelerated, the reaction material is solidified into a powdery substance along with the acidolysis reaction, the powdery substance is slowly cured under the stirring of a spiral stirrer arranged in the continuous acidolysis reactor 5 until the powdery substance reaches two ends of the reactor, and then the powdery substance enters a dissolving tank 6 for dissolving to obtain titanium liquid which is sent to the next process.
Adopt through the actual production demonstration of this company the utility model discloses titanium white powder acidolysis mixes metering device sour ore ratio and reaction acid concentration in succession can all effectively be controlled, reaches the purpose of continuous acidolysis steady production.
Claims (6)
1. A titanium dioxide continuous acidolysis premixing metering device is characterized by comprising a mineral powder storage tank (1), a mineral powder weighing metering tank (2), a screw conveyor (3), an acid ore premixing tank (4), a continuous acidolysis reactor (5), a dissolving tank (6), a dilute waste acid storage tank (7) and a 98% sulfuric acid storage tank (8); the powdered ore weighing and metering tank (2) have two, install in the below of powdered ore storage tank (1) through the pipe connection respectively, two powdered ore weighing and metering tank (2) are connected with screw conveyer (3) respectively, screw conveyer (3) and 98% sulphuric acid storage tank (8) link to each other with acid ore premixing groove (4) respectively, acid ore premixing groove (4) are connected with continuous acidolysis reactor (5), the both ends of continuous acidolysis reactor (5) are connected with dissolving tank (6) respectively, continuous acidolysis reactor (5) and dilute waste acid storage tank (7) link to each other through the pipeline.
2. The titanium dioxide continuous acidolysis premixing and metering device as claimed in claim 1, wherein a star-shaped discharge valve (10) is installed between the connecting pipelines of the mineral powder storage tank (1) and the mineral powder weighing and metering tank (2).
3. The titanium dioxide continuous acidolysis premixing and metering device according to claim 1, wherein a pneumatic gate valve (11) is installed at the bottom of the mineral powder weighing and metering tank (2), and the mineral powder weighing and metering tank (2) is controlled to discharge onto the screw conveyor (3) through the pneumatic gate valve (11).
4. The titanium dioxide continuous acidolysis premixing and metering device according to claim 1, wherein the 98% sulfuric acid storage tank (8) is connected with the acid ore premixing tank (4) through a pipeline, an electromagnetic flow meter (9) is installed on the connected pipeline, and the sulfuric acid with the mass concentration of 98% is directly added into the acid ore premixing tank (4) through metering control of the electromagnetic flow meter (9).
5. The titanium dioxide continuous acidolysis premixing and metering device according to claim 1, wherein an electromagnetic flow meter (9) is installed on a pipeline connecting the continuous acidolysis reactor (5) and the dilute waste acid storage tank (7), and the dilute waste acid is metered and controlled by the electromagnetic flow meter (9) and added into the continuous acidolysis reactor (5).
6. The titanium dioxide continuous acidolysis premixing and metering device according to claim 1, wherein the continuous acidolysis reactor (5) is provided with a flue gas outlet for discharging flue gas generated during acidolysis reaction, and the continuous acidolysis reactor (5) and the dissolution tank (6) are provided with process water inlets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922146660.1U CN211470801U (en) | 2019-12-04 | 2019-12-04 | Titanium white powder continuous acidolysis premixing metering device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922146660.1U CN211470801U (en) | 2019-12-04 | 2019-12-04 | Titanium white powder continuous acidolysis premixing metering device |
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| CN211470801U true CN211470801U (en) | 2020-09-11 |
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| CN201922146660.1U Active CN211470801U (en) | 2019-12-04 | 2019-12-04 | Titanium white powder continuous acidolysis premixing metering device |
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