CN109626404A - The washing methods of boehmite - Google Patents
The washing methods of boehmite Download PDFInfo
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- CN109626404A CN109626404A CN201910081889.3A CN201910081889A CN109626404A CN 109626404 A CN109626404 A CN 109626404A CN 201910081889 A CN201910081889 A CN 201910081889A CN 109626404 A CN109626404 A CN 109626404A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
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Abstract
The invention discloses the washing methods of boehmite.The following steps are included: washing for the first time: after the boehmite slurry filtration of aging, filter residue is discharged into a rinsing bowl, the secondary filtrate mixing, washing sent with secondary cleaning water storage tank；Second of washing: filtering again, and first-time filtrate flows into primary wash liquor storage tank, and a filter residue is discharged into four filtrate mixing, washings that secondary rinsing bowl and four washing lotion storage tanks are sent；Third time is washed: being filtered again, secondary filtrate is pumped into a rinsing bowl after flowing into secondary cleaning water storage tank, and secondary filter residue is discharged into the hot water mixing, washing of rinsing bowl three times and hot water storgae；4th washing: filtering again, and filtrate flows into washing lotion storage tank three times three times, and filter residue is discharged into four rinsing bowls three times, the hot water mixing, washing with hot water storgae；It filters out: filtering again, four filtrates are pumped into secondary rinsing bowl after flowing into four washing lotion storage tanks, and four filter residues are qualified filter residue.The present invention increases washing times, improves detersive efficiency, but water consumption greatly reduces.
Description
Technical field
The present invention relates to chemical fields, and in particular to the washing methods of boehmite.
Background technique
In process for making alumina, after boehmite slurry aging, needs to wash boehmite and filter.It is existing
Washing process in be all made of washing method three times, and wash every time and new water is added is washed, pole is wasted water.
Summary of the invention
The purpose of the present invention is to provide the washing methods of boehmite, wash after solving the aging of boehmite slurry
The problem of water wasting.
In order to solve the above technical problems, the invention adopts the following technical scheme:
The washing methods of boehmite, comprising the following steps:
S1 is washed for the first time: after the boehmite slurry filtration after aging, filter residue is discharged into a rinsing bowl, is washed with secondary
The secondary filtrate that liquid storage tank is sent is stirred completion and washs for the first time；
Second of washing of S2: it after washing for the first time, filters again, first-time filtrate flows into primary wash liquor storage tank, and one time filter residue is discharged into
In secondary rinsing bowl, four filtrates sent with four washing lotion storage tanks, which are mixed, completes second of washing；
S3 third time is washed: after second is washed, being filtered again, secondary filtrate is pumped into primary washing after flowing into secondary cleaning water storage tank
In slot, secondary filter residue is discharged into rinsing bowl three times, is mixed with the hot water that hot water storgae is sent and is completed third time washing；
S4 the 4th time washing: after third time is washed, filtering again, and filtrate flows into washing lotion storage tank three times three times, and filter residue is discharged into three times
In four rinsing bowls, it is mixed with the hot water that hot water storgae is sent and completes the 4th washing；
S5 is filtered out: it after the 4th washing, filters, is pumped into secondary rinsing bowl after four filtrate four washing lotion storage tanks of inflow again,
Four filter residues are qualified filter residue.
Washing, the 4th new water washing of washing for the third time after improvement, first time slurry are after washing for the second time
Secondary filtrate, second slurry are four filtrates after the 4th washing, realize circulation washing, and boehmite the
When once washing, impurity content is more, it is not necessary that with new water, and can be intended using the secondary filtrate after having washed twice
For boehmite after four washings, impurity is seldom in four filtrates, may be used as second of slurry.Although with this
Washing times are increased, improve detersive efficiency, but water consumption but greatly reduces.
Preferably, S1 washing for the first time, second of washing of S2, the washing of S3 third time, S4 the 4th time washing, S5
The filtering in step is filtered out, filter press filters pressing is all made of.Filtrate quick separating is promoted using filter press filters pressing, reduces secondary response
Consumption to boehmite, and filter residue attached liquid can be reduced.
Preferably, S1 washing for the first time, second of washing of S2, the 4th washing of S3 third time, S4 purge step
After being stirred in rapid, liquid consolidate volume ratio as 15~20:1.Water consumption excessively will cause waste, and very few meltage washs effect less
Fruit is bad, best with this ratio.
Preferably, in second S1 washing for the first time, S2 of washing step when being stirred, be passed through steam and add
Heat is to 50~90 DEG C.Steam water consumption is small, and can reach heating effect, heats so far temperature, helps to reinforce warm-up movement, be conducive to
Impurity falls off, while solution viscosity reduces, and is conducive to filter, to enhance washing effect.
Preferably, S1 washing for the first time, second of washing of S2, the 4th washing of S3 third time, S4 purge step
In rapid a length of 20~40 minutes when being stirred.
Preferably, the hot water temperature in the 4th the S3 third time washing, S4 washing step is 70~90 DEG C.Heat
Coolant-temperature gage temperature is higher, AlO2 -With Na+Between absorption be exothermic reaction, temperature increases, and adsorbance reduces, and finally washs twice
Using the higher new hot water of temperature, can be conducive to be detached from absorption, to improve washing effect, and the water conservation guaranteed again, save consumption
Heat.
Preferably, the hot water in hot water storgae is from oxygen in the 4th the S3 third time washing, S4 washing step
Change the condensation of aluminium manufacturer's decomposition evaporation area.It links, saves water with alumina producer decomposition evaporation area, and eliminate the time of heating water
And fuel, it improves efficiency and energy saving.
Preferably, S1 washing for the first time, second of washing of S2, the 4th washing of S3 third time, S4 purge step
In rapid when being stirred, using ultrasonic oscillation, intensity is 0.9~1.5W/ ㎝ 2, and the time is 3~5 minutes.Using ultrasonic wave
Concussion is conducive to the disengaging of filter residue attached liquid, while being conducive to the rupture of filter residue surface film, conducive to the abundant dissolution of filter residue attached liquid, improves
Washing effect.
Compared with prior art, the beneficial effects of the present invention are: invention increases washing times, washing effect is improved
Rate, but water consumption but greatly reduces；Detersive efficiency of the present invention faster, better effect；The present invention and alumina producer decomposition evaporation
Area's linkage, saves water, and improves efficiency and energy saving.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1:
The washing methods of boehmite, comprising the following steps:
S1 is washed for the first time: after the boehmite slurry filtration after aging, filter residue is discharged into a rinsing bowl, is washed with secondary
The secondary filtrate that liquid storage tank is sent is stirred completion and washs for the first time, and it is 15:1 that liquid, which consolidates volume ratio, a length of 40 when being stirred
Minute；
Second of washing of S2: it after washing for the first time, filters again, first-time filtrate flows into primary wash liquor storage tank, and one time filter residue is discharged into
In secondary rinsing bowl, four filtrates sent with four washing lotion storage tanks, which are mixed, completes second of washing, and liquid consolidates volume ratio and is
20:1, a length of 30 minutes when being stirred；
S3 third time is washed: after second is washed, being filtered again, secondary filtrate is pumped into primary washing after flowing into secondary cleaning water storage tank
In slot, secondary filter residue is discharged into rinsing bowl three times, is mixed with the hot water that hot water storgae is sent and is completed third time washing, hot water temperature
Degree is 90 DEG C, and it is 20:1 that liquid, which consolidates volume ratio, a length of 40 minutes when being stirred；
S4 the 4th time washing: after third time is washed, filtering again, and filtrate flows into washing lotion storage tank three times three times, and filter residue is discharged into three times
It in four rinsing bowls, is mixed with the hot water that hot water storgae is sent and completes the 4th washing, hot water temperature is 90 DEG C, liquid solid product
Than for 20:1, a length of 40 minutes when being stirred；
S5 is filtered out: it after the 4th washing, filters, is pumped into secondary rinsing bowl after four filtrate four washing lotion storage tanks of inflow again,
Four filter residues are qualified filter residue.
Washing, the 4th new water washing of washing for the third time after improvement, first time slurry are after washing for the second time
Secondary filtrate, second slurry are four filtrates after the 4th washing, realize circulation washing, and boehmite the
When once washing, impurity content is more, it is not necessary that with new water, and can be intended using the secondary filtrate after having washed twice
For boehmite after four washings, impurity is seldom in four filtrates, may be used as second of slurry.Although with this
Washing times are increased, improve detersive efficiency, but water consumption but greatly reduces.
Embodiment 2:
The washing methods of boehmite, comprising the following steps:
S1 is washed for the first time: after the boehmite slurry filtration after aging, filter residue is discharged into a rinsing bowl, is washed with secondary
The secondary filtrate that liquid storage tank is sent is stirred completion and washs for the first time, and it is 20:1 that liquid, which consolidates volume ratio, a length of 20 when being stirred
Minute；
Second of washing of S2: it after washing for the first time, filters again, first-time filtrate flows into primary wash liquor storage tank, and one time filter residue is discharged into
In secondary rinsing bowl, four filtrates sent with four washing lotion storage tanks, which are mixed, completes second of washing, and liquid consolidates volume ratio and is
20:1, a length of 40 minutes when being stirred；
S3 third time is washed: after second is washed, being filtered again, secondary filtrate is pumped into primary washing after flowing into secondary cleaning water storage tank
In slot, secondary filter residue is discharged into rinsing bowl three times, is mixed with the hot water that hot water storgae is sent and is completed third time washing, hot water temperature
Degree is 70 DEG C, and it is 20:1 that liquid, which consolidates volume ratio, a length of 40 minutes when being stirred；
S4 the 4th time washing: after third time is washed, filtering again, and filtrate flows into washing lotion storage tank three times three times, and filter residue is discharged into three times
It in four rinsing bowls, is mixed with the hot water that hot water storgae is sent and completes the 4th washing, hot water temperature is 70 DEG C, liquid solid product
Than for 20:1, a length of 40 minutes when being stirred；
S5 is filtered out: it after the 4th washing, filters, is pumped into secondary rinsing bowl after four filtrate four washing lotion storage tanks of inflow again,
Four filter residues are qualified filter residue.
Washing, the 4th new water washing of washing for the third time after improvement, first time slurry are after washing for the second time
Secondary filtrate, second slurry are four filtrates after the 4th washing, realize circulation washing, and boehmite the
When once washing, impurity content is more, it is not necessary that with new water, and can be intended using the secondary filtrate after having washed twice
For boehmite after four washings, impurity is seldom in four filtrates, may be used as second of slurry.Although with this
Washing times are increased, improve detersive efficiency, but water consumption but greatly reduces.
Embodiment 3:
The washing methods of boehmite, comprising the following steps:
S1 is washed for the first time: after the boehmite slurry filtration after aging, filter residue is discharged into a rinsing bowl, is washed with secondary
The secondary filtrate that liquid storage tank is sent, which is stirred and is passed through, is steam heated to 50 DEG C of completions first time washings, and liquid consolidates volume ratio and is
20:1, a length of 20 minutes when being stirred；
Second of washing of S2: it after washing for the first time, filters again, first-time filtrate flows into primary wash liquor storage tank, and one time filter residue is discharged into
In secondary rinsing bowl, mixes and be passed through with four filtrates that four washing lotion storage tanks are sent and be steam heated to 50 DEG C of stirrings and complete second
Secondary washing, it is 20:1 that liquid, which consolidates volume ratio, a length of 40 minutes when being stirred；
S3 third time is washed: after second is washed, being filtered again, secondary filtrate is pumped into primary washing after flowing into secondary cleaning water storage tank
In slot, secondary filter residue is discharged into rinsing bowl three times, is mixed with the hot water that hot water storgae is sent and is completed third time washing, hot water temperature
Degree is 70 DEG C, and it is 20:1 that liquid, which consolidates volume ratio, a length of 20 minutes when being stirred；
S4 the 4th time washing: after third time is washed, filtering again, and filtrate flows into washing lotion storage tank three times three times, and filter residue is discharged into three times
It in four rinsing bowls, is mixed with the hot water that hot water storgae is sent and completes the 4th washing, hot water temperature is 70 DEG C, liquid solid product
Than for 15:1, a length of 20 minutes when being stirred；
S5 is filtered out: it after the 4th washing, filters, is pumped into secondary rinsing bowl after four filtrate four washing lotion storage tanks of inflow again,
Four filter residues are qualified filter residue.
Washing, the 4th new water washing of washing for the third time after improvement, first time slurry are after washing for the second time
Secondary filtrate, second slurry are four filtrates after the 4th washing, realize circulation washing, and boehmite the
When once washing, impurity content is more, it is not necessary that with new water, and can be intended using the secondary filtrate after having washed twice
For boehmite after four washings, impurity is seldom in four filtrates, may be used as second of slurry.Although with this
Washing times are increased, improve detersive efficiency, but water consumption but greatly reduces.
Embodiment 4:
The washing methods of boehmite, comprising the following steps:
S1 is washed for the first time: after the boehmite slurry filtration after aging, filter residue is discharged into a rinsing bowl, is washed with secondary
The secondary filtrate that liquid storage tank is sent, which is stirred and is passed through, is steam heated to 90 DEG C of completions first time washings, and liquid consolidates volume ratio and is
20:1, a length of 20 minutes when being stirred；
Second of washing of S2: it after washing for the first time, filters again, first-time filtrate flows into primary wash liquor storage tank, and one time filter residue is discharged into
In secondary rinsing bowl, mixes and be passed through with four filtrates that four washing lotion storage tanks are sent and be steam heated to 90 DEG C of stirrings and complete second
Secondary washing, it is 15:1 that liquid, which consolidates volume ratio, a length of 40 minutes when being stirred；
S3 third time is washed: after second is washed, being filtered again, secondary filtrate is pumped into primary washing after flowing into secondary cleaning water storage tank
In slot, secondary filter residue is discharged into rinsing bowl three times, is mixed with the hot water that hot water storgae is sent and is completed third time washing, hot water temperature
Degree is 90 DEG C, and it is 15:1 that liquid, which consolidates volume ratio, a length of 40 minutes when being stirred；
S4 the 4th time washing: after third time is washed, filtering again, and filtrate flows into washing lotion storage tank three times three times, and filter residue is discharged into three times
It in four rinsing bowls, is mixed with the hot water that hot water storgae is sent and completes the 4th washing, hot water temperature is 90 DEG C, liquid solid product
Than for 15:1, a length of 40 minutes when being stirred；
S5 is filtered out: it after the 4th washing, filters, is pumped into secondary rinsing bowl after four filtrate four washing lotion storage tanks of inflow again,
Four filter residues are qualified filter residue.
Washing, the 4th new water washing of washing for the third time after improvement, first time slurry are after washing for the second time
Secondary filtrate, second slurry are four filtrates after the 4th washing, realize circulation washing, and boehmite the
When once washing, impurity content is more, it is not necessary that with new water, and can be intended using the secondary filtrate after having washed twice
For boehmite after four washings, impurity is seldom in four filtrates, may be used as second of slurry.Although with this
Washing times are increased, improve detersive efficiency, but water consumption but greatly reduces.
Embodiment 5:
The washing methods of boehmite, comprising the following steps:
S1 is washed for the first time: after the boehmite slurry filtration after aging, filter residue is discharged into a rinsing bowl, is washed with secondary
The secondary filtrate that liquid storage tank is sent, which is stirred and is passed through, is steam heated to 90 DEG C of completions first time washings, and liquid consolidates volume ratio and is
20:1 a length of 40 minutes when being stirred, and uses ultrasonic oscillation, and intensity is 1.5W/ ㎝ 2, and the time is 3 minutes；
Second of washing of S2: it after washing for the first time, filters again, first-time filtrate flows into primary wash liquor storage tank, and one time filter residue is discharged into
In secondary rinsing bowl, mixes and be passed through with four filtrates that four washing lotion storage tanks are sent and be steam heated to 85 DEG C of stirrings and complete second
Secondary washing, it is 20:1 that liquid, which consolidates volume ratio, a length of 40 minutes when being stirred, and uses ultrasonic oscillation, and intensity is 1.5W/ ㎝ 2,
Time is 3 minutes；
S3 third time is washed: after second is washed, being filtered again, secondary filtrate is pumped into primary washing after flowing into secondary cleaning water storage tank
In slot, secondary filter residue is discharged into rinsing bowl three times, is mixed with the hot water that hot water storgae is sent and is completed third time washing, hot water storgae
In hot water condensed from alumina producer decomposition evaporation area, hot water temperature is 70 DEG C, and liquid consolidate volume ratio as 20:1, is stirred
Shi Changwei 20 minutes, and ultrasonic oscillation is used, intensity is 0.9W/ ㎝ 2, and the time is 5 minutes；
S4 the 4th time washing: after third time is washed, filtering again, and filtrate flows into washing lotion storage tank three times three times, and filter residue is discharged into three times
In four rinsing bowls, it is mixed with the hot water that hot water storgae is sent and completes the 4th washing, the hot water in hot water storgae is from oxygen
Changing the condensation of aluminium manufacturer's decomposition evaporation area, hot water temperature is 70 DEG C, and it is 20:1 that liquid, which consolidates volume ratio, a length of 20 minutes when being stirred, and
Using ultrasonic oscillation, intensity is 0.9W/ ㎝ 2, and the time is 5 minutes；
S5 is filtered out: it after the 4th washing, filters, is pumped into secondary rinsing bowl after four filtrate four washing lotion storage tanks of inflow again,
Four filter residues are qualified filter residue.
Washing, the 4th new water washing of washing, new water also come from alumina producer decomposition evaporation for the third time after improvement
Area's condensation.First time slurry is the secondary filtrate after second of washing, after second of slurry is the 4th washing
Four filtrates realize circulation washing, and when boehmite washs for the first time, impurity content is more, it is not necessary that with new water,
And can be using the secondary filtrate after having washed twice, impurity has been after four washings, in four filtrates for boehmite
Through seldom, second of slurry may be used as.Although increasing washing times with this, detersive efficiency is improved, uses water
Amount but greatly reduces.
Embodiment 6:
The washing methods of boehmite, comprising the following steps:
S1 is washed for the first time: after the boehmite slurry filtration after aging, filter residue is discharged into a rinsing bowl, is washed with secondary
The secondary filtrate that liquid storage tank is sent, which is stirred and is passed through, is steam heated to 90 DEG C of completions first time washings, and liquid consolidates volume ratio and is
20:1 a length of 40 minutes when being stirred, and uses ultrasonic oscillation, and intensity is 1.5W/ ㎝ 2, and the time is 3 minutes；
Second of washing of S2: it after washing for the first time, filters again, first-time filtrate flows into primary wash liquor storage tank, and one time filter residue is discharged into
In secondary rinsing bowl, mixes and be passed through with four filtrates that four washing lotion storage tanks are sent and be steam heated to 85 DEG C of stirrings and complete second
Secondary washing, it is 15~20:1 that liquid, which consolidates volume ratio, a length of 20~40 minutes when being stirred, and uses ultrasonic oscillation, intensity is
1.5W/ ㎝ 2, time are 5 minutes；
S3 third time is washed: after second is washed, being filtered again, secondary filtrate is pumped into primary washing after flowing into secondary cleaning water storage tank
In slot, secondary filter residue is discharged into rinsing bowl three times, is mixed with the hot water that hot water storgae is sent and is completed third time washing, hot water storgae
In hot water condensed from alumina producer decomposition evaporation area, hot water temperature is 90 DEG C, and liquid consolidate volume ratio as 15:1, is stirred
Shi Changwei 40 minutes, and ultrasonic oscillation is used, intensity is 0.9W/ ㎝ 2, and the time is 5 minutes；
S4 the 4th time washing: after third time is washed, filtering again, and filtrate flows into washing lotion storage tank three times three times, and filter residue is discharged into three times
In four rinsing bowls, it is mixed with the hot water that hot water storgae is sent and completes the 4th washing, the hot water in hot water storgae is from oxygen
Changing the condensation of aluminium manufacturer's decomposition evaporation area, hot water temperature is 90 DEG C, and it is 15:1 that liquid, which consolidates volume ratio, a length of 40 minutes when being stirred, and
Using ultrasonic oscillation, intensity is 1.5W/ ㎝ 2, and the time is 3 minutes；
S5 is filtered out: it after the 4th washing, filters, is pumped into secondary rinsing bowl after four filtrate four washing lotion storage tanks of inflow again,
Four filter residues are qualified filter residue.
Washing, the 4th new water washing of washing, new water also come from alumina producer decomposition evaporation for the third time after improvement
Area's condensation.First time slurry is the secondary filtrate after second of washing, after second of slurry is the 4th washing
Four filtrates realize circulation washing, and when boehmite washs for the first time, impurity content is more, it is not necessary that with new water,
And can be using the secondary filtrate after having washed twice, impurity has been after four washings, in four filtrates for boehmite
Through seldom, second of slurry may be used as.Although increasing washing times with this, detersive efficiency is improved, uses water
Amount but greatly reduces.
Optimum embodiment:
The washing methods of boehmite, comprising the following steps:
S1 is washed for the first time: after the boehmite slurry filtration after aging, filter residue is discharged into a rinsing bowl, is washed with secondary
The secondary filtrate that liquid storage tank is sent, which is stirred and is passed through, is steam heated to 85 DEG C of completions first time washings, and liquid consolidates volume ratio and is
20:1 a length of 30 minutes when being stirred, and uses ultrasonic oscillation, and intensity is 1W/ ㎝ 2, and the time is 5 minutes；
Second of washing of S2: it after washing for the first time, filters again, first-time filtrate flows into primary wash liquor storage tank, and one time filter residue is discharged into
In secondary rinsing bowl, mixes and be passed through with four filtrates that four washing lotion storage tanks are sent and be steam heated to 85 DEG C of stirrings and complete second
Secondary washing, it is 20:1 that liquid, which consolidates volume ratio, a length of 30 minutes when being stirred, and uses ultrasonic oscillation, and intensity is 1.2W/ ㎝ 2,
Time is 5 minutes；
S3 third time is washed: after second is washed, being filtered again, secondary filtrate is pumped into primary washing after flowing into secondary cleaning water storage tank
In slot, secondary filter residue is discharged into rinsing bowl three times, is mixed with the hot water that hot water storgae is sent and is completed third time washing, hot water storgae
In hot water condensed from alumina producer decomposition evaporation area, hot water temperature is 90 DEG C, and liquid consolidate volume ratio as 15:1, is stirred
Shi Changwei 40 minutes, and ultrasonic oscillation is used, intensity is 1.2W/ ㎝ 2, and the time is 5 minutes；
S4 the 4th time washing: after third time is washed, filtering again, and filtrate flows into washing lotion storage tank three times three times, and filter residue is discharged into three times
In four rinsing bowls, it is mixed with the hot water that hot water storgae is sent and completes the 4th washing, the hot water in hot water storgae is from oxygen
Changing the condensation of aluminium manufacturer's decomposition evaporation area, hot water temperature is 90 DEG C, and it is 15:1 that liquid, which consolidates volume ratio, a length of 30 minutes when being stirred, and
Using ultrasonic oscillation, intensity is 1.2W/ ㎝ 2, and the time is 5 minutes；
S5 is filtered out: it after the 4th washing, filters, is pumped into secondary rinsing bowl after four filtrate four washing lotion storage tanks of inflow again,
Four filter residues are qualified filter residue.
Washing, the 4th new water washing of washing, new water also come from alumina producer decomposition evaporation for the third time after improvement
Area's condensation.First time slurry is the secondary filtrate after second of washing, after second of slurry is the 4th washing
Four filtrates realize circulation washing, and when boehmite washs for the first time, impurity content is more, it is not necessary that with new water,
And can be using the secondary filtrate after having washed twice, impurity has been after four washings, in four filtrates for boehmite
Through seldom, second of slurry may be used as.Although increasing washing times with this, detersive efficiency is improved, uses water
Amount but greatly reduces.
Multiple explanatory embodiments spoken of in the present specification refer to the specific method packet for combining embodiment description
It includes at least one embodiment of the application generality description.It is not certain that statement of the same race, which occur, in multiple places in the description
Refer to the same embodiment.Furthermore, it is understood that is advocated is to combine when describing a method in conjunction with any one embodiment
Other embodiments realize that this method is fallen within the scope of the present invention.
Claims (8)
1. the washing methods of boehmite, it is characterised in that: the following steps are included:
S1 is washed for the first time: after the boehmite slurry filtration after aging, filter residue is discharged into a rinsing bowl, is washed with secondary
The secondary filtrate that liquid storage tank is sent is stirred completion and washs for the first time；
Second of washing of S2: it after washing for the first time, filters again, first-time filtrate flows into primary wash liquor storage tank, and one time filter residue is discharged into
In secondary rinsing bowl, four filtrates sent with four washing lotion storage tanks, which are mixed, completes second of washing；
S3 third time is washed: after second is washed, being filtered again, secondary filtrate is pumped into primary washing after flowing into secondary cleaning water storage tank
In slot, secondary filter residue is discharged into rinsing bowl three times, is mixed with the hot water that hot water storgae is sent and is completed third time washing；
S4 the 4th time washing: after third time is washed, filtering again, and filtrate flows into washing lotion storage tank three times three times, and filter residue is discharged into three times
In four rinsing bowls, it is mixed with the hot water that hot water storgae is sent and completes the 4th washing；
S5 is filtered out: it after the 4th washing, filters, is pumped into secondary rinsing bowl after four filtrate four washing lotion storage tanks of inflow again,
Four filter residues are qualified filter residue.
2. the washing methods of boehmite according to claim 1, it is characterised in that: S1 washing for the first time,
Second of washing of S2, the washing of S3 third time, S4 the 4th time washing, S5 filter out the filtering in step, are all made of filter press filters pressing.
3. the washing methods of boehmite according to claim 1, it is characterised in that: S1 washing for the first time,
S2 second washs, the washing of S3 third time, after being stirred in the 4th washing step of S4, it is 15~20 that liquid, which consolidate volume ratio:
1。
4. the washing methods of boehmite according to claim 1, it is characterised in that: S1 washing for the first time,
In second of washing step of S2 when being stirred, be passed through and be steam heated to 50~90 DEG C.
5. the washing methods of boehmite according to claim 1, it is characterised in that: S1 washing for the first time,
S2 second washs, the washing of S3 third time, in the 4th washing step of S4 a length of 20~40 minutes when being stirred.
6. the washing methods of boehmite according to claim 1, it is characterised in that: S3 washing for the third time,
Hot water temperature in the 4th washing step of S4 is 70~90 DEG C.
7. the washing methods of boehmite according to claim 1, it is characterised in that: S3 washing for the third time,
In the 4th washing step of S4, the hot water in hot water storgae is condensed from alumina producer decomposition evaporation area.
8. the washing methods of boehmite according to claim 1, it is characterised in that: S1 washing for the first time,
S2 second washs, the washing of S3 third time, in the 4th washing step of S4 when being stirred, using ultrasonic oscillation, intensity
For 0.9~1.5W/ ㎝ 2, the time is 3~5 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910081889.3A CN109626404A (en) | 2019-01-28 | 2019-01-28 | The washing methods of boehmite |
Applications Claiming Priority (1)
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| CN101665262A (en) * | 2009-10-21 | 2010-03-10 | 中国铝业股份有限公司 | Preparation method for pseudo-boehmite |
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