CN102974168A - Roasting process and equipment for preparing diatomite filter aid - Google Patents
Roasting process and equipment for preparing diatomite filter aid Download PDFInfo
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- CN102974168A CN102974168A CN2012104999839A CN201210499983A CN102974168A CN 102974168 A CN102974168 A CN 102974168A CN 2012104999839 A CN2012104999839 A CN 2012104999839A CN 201210499983 A CN201210499983 A CN 201210499983A CN 102974168 A CN102974168 A CN 102974168A
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Abstract
The invention relates to a process and equipment for preparing a filter aid by taking diatomite as a raw material. A roasting process for preparing a diatomite filter aid is characterized by comprising the following steps of: 1) uniformly mixing the diatomite with a fluxing agent to obtain a mixed material, wherein the use amount of the fluxing agent is 5-15% of the mass of the diatomite; 2) conveying the mixed material into a rotary kiln to roast, wherein the roasting temperature is 800-1100 DEG C and the roasting time is 30-150 minutes; 3) isolating the rotary kiln from air through an air locking valve and spraying fire and roasting at a discharging end; 4) after the roasting, conveying the material into a sealing and cooling cabin to be cooled; and 5) after the cooling, crushing and grading to obtain the diatomite filter aid. According to the process and the equipment disclosed by the invention, a diatomite filter aid product with great granularity, high filtering speed and high filtering precision can be obtained.
Description
Technical field
The present invention relates to a kind of Processes and apparatus for preparing filter aid take diatomite as raw material.
Background technology
Preparing at present the flux method of roasting product filter aid of diatomite is: after diatomite material and flux mix, feed rotary kiln and carry out roasting, the complete rear crushing and classification of roasting obtains the filter aid product of different brackets.Roasting process is common air atmosphere without carrying out atmosphere control, and the filter aid properties of product that obtain under this atmosphere do not reach the highest, and the space of further lifting is arranged.
Summary of the invention
The object of the present invention is to provide a kind of roasting technique and equipment for preparing super-cell, this Processes and apparatus can obtain the more super-cell of high filtration speed and filtering accuracy.
For achieving the above object, the technical solution used in the present invention is: a kind of roasting technique for preparing super-cell is characterized in that it comprises the steps:
1) diatomite and flux are mixed, obtain mixed material; Wherein the flux consumption is 5 ~ 15% of diatomite quality;
2) roasting apparatus of preparation preparation super-cell; Mixed material is sent into (sending into by screw(-type) feeder) rotary kiln and is carried out roasting, and sintering temperature is 800 ~ 1100 ℃, and roasting time is 30 ~ 150min;
3) make secluding air in the rotary kiln by blocking valve, and the roasting of discharge end flame (superfluous combustion-supporting gas should not be arranged, create reducing atmosphere);
4) material enters sealing cooling storehouse cooling after the roasting;
5) carry out crushing and classification after the cooling, obtain the super-cell (product) of different brackets.
The described diatomite of step 1) is high-quality diatomite; Or: the diatomite that middle quality, inferior diatomite obtain through purification (namely smart native, smart soil refers to that dioxide-containing silica surpasses the diatomite of 85wt%).Described high-quality diatomite refers to that dioxide-containing silica surpasses the diatomite of 85wt%; The diatomite of described middle quality refers to that dioxide-containing silica is lower than 85wt%, surpasses the diatomite of 75wt%; Described inferior diatomite refers to that dioxide-containing silica is lower than the diatomite of 75wt%.
The described flux of step 1) is the mixing that any one or any two or more (containing any two) in sodium carbonate, sodium chloride, NaOH, the potash etc. is pressed any proportioning.
A kind of roasting apparatus of realizing the preparation super-cell of above-mentioned technique is characterized in that it comprises screw(-type) feeder 1, exhaust check valve 2, rotary kiln 3, the first blocking valve 5, sealing cooling storehouse 6, the second blocking valve 7; The discharge end of screw(-type) feeder 1 is connected with the feed end of rotary kiln 3, the feed end of rotary kiln 3 is provided with exhaust check valve 2, the discharging opening of rotary kiln 3 links to each other by the charging aperture of the first blocking valve 5 with sealing cooling storehouse 6, flame-thrower nozzle 4 is arranged on the discharge end of rotary kiln 3, (isolated with air in the rotary kiln, and in the roasting of discharge end flame, superfluous combustion-supporting gas should not be arranged, create reducing atmosphere); The discharging opening in sealing cooling storehouse 6 is provided with the second blocking valve 7.
Crisscross in the horizontal direction in the described sealing cooling storehouse 6 have a resistant to elevated temperatures stainless steel tube, is connected with recirculated cooling water in the stainless steel tube.
In the equipment provided by the invention, material feeds rotary kiln by screw(-type) feeder, does not have large quantity of air and enters rotary kiln with material; The feed end of rotary kiln is provided with exhaust check valve, make the institute's moisture of being with effusion in gas and the material after the burning, discharging opening is provided with the first blocking valve, do not have air in the time of discharging and enter rotary kiln, make in the rotary kiln isolated with air, and in the roasting of discharge end flame, superfluous combustion-supporting gas should not be arranged, create reduction roasting atmosphere; Sealing cooling storehouse charging aperture, discharging opening are equipped with blocking valve, guarantee not have when material passes through air and enter; There is the crisscross high temperature resistant stainless steel pipe of horizontal direction cooling inside, storehouse, is connected with recirculated cooling water in the steel pipe material is cooled off.
The present invention compares the advantage that has with existing technique, can obtain that granularity is thicker, the rate of filtration and filtering accuracy higher super-cell product all.
Description of drawings
Fig. 1 is the longitudinal sectional drawing of the present invention's roasting apparatus of preparing super-cell (screw(-type) feeder, rotary kiln, sealing cooling storehouse).
Fig. 2 is the transverse cross-sectional view in sealing cooling of the present invention storehouse.
Among the figure: 1 is screw(-type) feeder; 2 is exhaust check valve, and from then on gas and moisture discharge after the burning; 3 is rotary kiln; 4 is flame-thrower nozzle; 5 is the first blocking valve, and material enters the cooling storehouse by the first blocking valve 5 after the roasting, guarantees not have when material passes through air and passes through; 6 for sealing cooling storehouse, and the crisscross high temperature resistant stainless steel pipe of horizontal direction is arranged in the storehouse, is connected with recirculated cooling water in the steel pipe, and the material cooling is rear from 7 dischargings of the second blocking valve; 7 is the second blocking valve.
The specific embodiment
Be illustrated the more excellent effect of filter aid properties of product that this roasting technique obtains below in conjunction with case study on implementation, but because the difference of diatomite character, content of the present invention includes, without being limited to the following examples.
The equipment that adopts among the following embodiment is: the roasting apparatus of preparation super-cell, and it comprises screw(-type) feeder 1, exhaust check valve 2, rotary kiln 3, the first blocking valve 5, sealing cooling storehouse 6, the second blocking valve 7; The discharge end of screw(-type) feeder 1 is connected with the feed end of rotary kiln 3, the feed end of rotary kiln 3 is provided with exhaust check valve 2, the discharging opening of rotary kiln 3 links to each other by the charging aperture of the first blocking valve 5 with sealing cooling storehouse 6, flame-thrower nozzle 4 is arranged on the discharge end of rotary kiln 3, (isolated with air in the rotary kiln, and in the roasting of discharge end flame, superfluous combustion-supporting gas should not be arranged, create reducing atmosphere); The discharging opening in sealing cooling storehouse 6 is provided with the second blocking valve 7.
Crisscross in the horizontal direction in the described sealing cooling storehouse 6 have a resistant to elevated temperatures stainless steel tube, is connected with recirculated cooling water in the stainless steel tube.
Embodiment 1
A kind of roasting technique for preparing super-cell, it comprises the steps:
1) diatomite material is the smart soil that the low-grade diatomite of Changbaishan area dioxide-containing silica 67wt% is purified and to be obtained through gravity separation, and dioxide-containing silica is 85.54wt% after purifying.
Prepare the roasting apparatus of preparation super-cell;
The pure smart native material size that obtains is-0.074mm, mixes with the sodium carbonate of pure smart soil (diatomite) quality 7% that obtains, and obtains mixed material; Mixed material is divided into two groups;
2) battery of tests adopts the roasting of present device sealing oxygen barrier, cooling (to make secluding air in the rotary kiln by blocking valve, and in the roasting of discharge end flame; Material enters sealing cooling storehouse cooling after the roasting); Another group test has air at common revolution roasting in kilns in the rotary kiln; Sintering temperature is 1000 ℃, cools off after all being incubated 2h;
3) roasting product is crushed and screened, record+the 0.150mm grade and-0.074mm grade productive rate, filter the permeability of mensuration-0.150mm grade filter aid to investigate the rate of filtration, (absorbance is lower to investigate filtering accuracy for the absorbance of the visible honourable photometric determination filtered fluid of employing 7200 types after the filtered beer stoste (absorbance is 1.9), filtrate is clarification more), the results are shown in Table 1.
1 liang of group of table 1 embodiment test index
| Calcination atmosphere | + 0.150mm productive rate (%) | -0.038mm productive rate (%) | Permeability (darcy) | Beer filtration liquid absorbance |
| Sealing oxygen barrier (the present invention) | 30.62 | 29.65 | 4.37 | 0.098 |
| Air (common rotary kiln) | 24.12 | 35.03 | 3.96 | 0.107 |
Table 1 has illustrated: the present invention can obtain that granularity is thicker, the rate of filtration and filtering accuracy higher super-cell product all.
Embodiment 2
A kind of roasting technique for preparing super-cell, it comprises the steps:
1) diatomite material is the smart soil that the low-grade diatomite of Changbaishan area dioxide-containing silica 67wt% is purified and to be obtained through gravity separation, and dioxide-containing silica is 85.54wt% after purifying.
Prepare the roasting apparatus of preparation super-cell;
The pure smart native material size that obtains is-0.150mm, mixes with the sodium carbonate of pure smart soil (diatomite) quality 7% that obtains, and obtains mixed material; Mixed material is divided into two groups;
2) battery of tests adopts the roasting of present device sealing oxygen barrier, cooling (to make secluding air in the rotary kiln by blocking valve, and in the roasting of discharge end flame; Material enters sealing cooling storehouse cooling after the roasting); Another group test has air at common revolution roasting in kilns in the rotary kiln; Sintering temperature is 1000 ℃, cools off after all being incubated 1.5h;
3) roasting product is crushed and screened, record+the 0.150mm grade and-0.074mm grade productive rate, filter the permeability of mensuration-0.150mm grade filter aid to investigate the rate of filtration, (absorbance is lower to investigate filtering accuracy for the absorbance of the visible honourable photometric determination filtered fluid of employing 7200 types after the filtered beer stoste (absorbance is 1.9), filtrate is clarification more), the results are shown in Table 2.
2 liang of groups of table 2 embodiment test index
| Calcination atmosphere | + 0.150mm productive rate (%) | -0.038mm productive rate (%) | Permeability (darcy) | Beer filtration liquid absorbance |
| Sealing oxygen barrier (the present invention) | 23.68 | 38.87 | 4.54 | 0.099 |
| Air (common rotary kiln) | 20.69 | 43.08 | 2.72 | 0.156 |
Table 2 has illustrated: the present invention can obtain that granularity is thicker, the rate of filtration and filtering accuracy higher super-cell product all.
Embodiment 3
Substantially the same manner as Example 1, difference is: " sodium carbonate " is replaced by " sodium chloride ".Its result is identical with embodiment 1.
Embodiment 4
Substantially the same manner as Example 1, difference is: " sodium carbonate " is replaced by " NaOH ".Its result is identical with embodiment 1.
Embodiment 5
Substantially the same manner as Example 1, difference is: " sodium carbonate " is replaced by " potash ".Its result is identical with embodiment 1.
Embodiment 6
Substantially the same manner as Example 1, difference is: " sodium carbonate " is replaced by " sodium carbonate, sodium chloride ", and the quality of sodium carbonate, sodium chloride respectively accounts for 1/2.Its result is identical with embodiment 1.
Embodiment 7
Substantially the same manner as Example 1, difference is: mix with the sodium carbonate of diatomite (the pure smart soil that obtains) quality 5%, the results are shown in Table 3.
7 liang of groups of table 3 embodiment test index
| Calcination atmosphere | + 0.150mm productive rate (%) | -0.038mm productive rate (%) | Permeability (darcy) | Beer filtration liquid absorbance |
| Sealing oxygen barrier (the present invention) | 25.96 | 38.15 | 2.65 | 0.099 |
| Air (common rotary kiln) | 20.78 | 44.78 | 1.68 | 0.105 |
Table 3 has illustrated: the present invention can obtain that granularity is thicker, the rate of filtration and filtering accuracy higher super-cell product all.
Embodiment 8
Substantially the same manner as Example 1, difference is: mix with the sodium carbonate of diatomite (the pure smart soil that obtains) quality 15%, the results are shown in Table 4.
8 liang of groups of table 4 embodiment test index
| Calcination atmosphere | + 0.150mm productive rate (%) | -0.038mm productive rate (%) | Permeability (darcy) | Beer filtration liquid absorbance |
| Sealing oxygen barrier (the present invention) | 35.86 | 22.73 | 3.76 | 0.152 |
| Air (common rotary kiln) | 28.55 | 27.97 | 2.56 | 0.201 |
Table 4 has illustrated: the present invention can obtain that granularity is thicker, the rate of filtration and filtering accuracy higher super-cell product all.
Substantially the same manner as Example 1, difference is: sintering temperature is 800 ℃, and roasting time is 30min; The results are shown in Table 5.
9 liang of groups of table 5 embodiment test index
| Calcination atmosphere | + 0.150mm productive rate (%) | -0.038mm productive rate (%) | Permeability (darcy) | Beer filtration liquid absorbance |
| Sealing oxygen barrier (the present invention) | 28.35 | 33.54 | 1.74 | 0.106 |
| Air (common rotary kiln) | 23.56 | 39.72 | 0.95 | 0.113 |
Table 5 has illustrated: the present invention can obtain that granularity is thicker, the rate of filtration and filtering accuracy higher super-cell product all.
Embodiment 10
Substantially the same manner as Example 1, difference is: sintering temperature is 1100 ℃, and roasting time is 150min; , the results are shown in Table 6.
10 liang of groups of table 6 embodiment test index
| Calcination atmosphere | + 0.150mm productive rate (%) | -0.038mm productive rate (%) | Permeability (darcy) | Beer filtration liquid absorbance |
| Sealing oxygen barrier (the present invention) | 33.17 | 26.78 | 4.22 | 0.115 |
| Air (common rotary kiln) | 25.93 | 33.21 | 3.73 | 0.125 |
Table 6 has illustrated: the present invention can obtain that granularity is thicker, the rate of filtration and filtering accuracy higher super-cell product all.
Embodiment 11
Substantially the same manner as Example 1, difference is: " diatomite material is the smart soil that the low-grade diatomite of Changbaishan area dioxide-containing silica 67wt% is purified and obtained through gravity separation; dioxide-containing silica is 85.54wt% after purifying " changes " high-quality diatomite " into, and dioxide-containing silica is 85.54wt% in the high-quality diatomite.Its result is identical with embodiment 1.
Embodiment 12
Substantially the same manner as Example 1, difference is: " diatomite material is the smart soil that the low-grade diatomite of Changbaishan area dioxide-containing silica 67wt% is purified and obtained through gravity separation; dioxide-containing silica is 85.54wt% after purifying " changes " diatomite material is the smart soil that the middle grade diatomite of dioxide-containing silica 80wt% is purified and obtained through gravity separation, and dioxide-containing silica is 85.54wt% after purifying " into.Its result is identical with embodiment 1.
The bound value of each technological parameter that the present invention is cited, with and interval value, can both realize the present invention, do not enumerate one by one embodiment at this.
Claims (5)
1. a roasting technique for preparing super-cell is characterized in that it comprises the steps:
1) diatomite and flux are mixed, obtain mixed material; Wherein the flux consumption is 5 ~ 15% of diatomite quality;
2) mixed material is sent into rotary kiln and is carried out roasting, and sintering temperature is 800 ~ 1100 ℃, and roasting time is 30 ~ 150min;
3) make secluding air in the rotary kiln by blocking valve, and in the roasting of discharge end flame;
4) material enters sealing cooling storehouse cooling after the roasting;
5) carry out crushing and classification after the cooling, obtain super-cell.
2. described a kind of roasting technique for preparing super-cell according to claim 1, it is characterized in that: the described diatomite of step 1) is high-quality diatomite, or: the smart soil that middle quality, inferior diatomite obtain through purification.
3. described a kind of roasting technique for preparing super-cell according to claim 1 is characterized in that: the described flux of step 1) is that any one or any two or more in sodium carbonate, sodium chloride, NaOH, the potash is by the mixing of any proportioning.
4. roasting apparatus of realizing the preparation super-cell of the described technique of claim 1 is characterized in that: it comprises screw(-type) feeder (1), exhaust check valve (2), rotary kiln (3), the first blocking valve (5), sealing cooling storehouse (6), the second blocking valve (7); The discharge end of screw(-type) feeder (1) is connected with the feed end of rotary kiln (3), the feed end of rotary kiln (3) is provided with exhaust check valve (2), the discharging opening of rotary kiln (3) links to each other by the charging aperture of the first blocking valve (5) with sealing cooling storehouse (6), and flame-thrower nozzle (4) is arranged on the discharge end of rotary kiln (3); The discharging opening in sealing cooling storehouse (6) is provided with the second blocking valve (7).
5. the roasting apparatus of described preparation super-cell according to claim 1 is characterized in that: crisscross in the horizontal direction in the described sealing cooling storehouse have a stainless steel tube, is connected with recirculated cooling water in the stainless steel tube.
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| CN201210499983.9A CN102974168B (en) | 2012-11-30 | 2012-11-30 | Roasting process and equipment for preparing diatomite filter aid |
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| CN201210499983.9A CN102974168B (en) | 2012-11-30 | 2012-11-30 | Roasting process and equipment for preparing diatomite filter aid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712462A (en) * | 2013-12-27 | 2014-04-09 | 内蒙古蒙西鄂尔多斯铝业有限公司 | Self-pulverization clinker indirect cooling equipment for fly ash limestone calcined alumina |
| CN106769776A (en) * | 2017-01-19 | 2017-05-31 | 广西珠江啤酒有限公司 | For the quantitative approach and detection method of the regenerative permeability of filter aids of beer filtration |
| CN108905958A (en) * | 2018-07-13 | 2018-11-30 | 临江市长白山助滤剂有限公司 | A kind of preparation method of super-cell |
| CN115318244A (en) * | 2022-08-24 | 2022-11-11 | 长白朝鲜族自治县天宝硅藻土功能制品有限公司 | Raw ore filter aid for producing diatom and process preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712462A (en) * | 2013-12-27 | 2014-04-09 | 内蒙古蒙西鄂尔多斯铝业有限公司 | Self-pulverization clinker indirect cooling equipment for fly ash limestone calcined alumina |
| CN103712462B (en) * | 2013-12-27 | 2016-06-08 | 内蒙古蒙西鄂尔多斯铝业有限公司 | A kind of fly ash-lime stone indirect cooling device of calcined alumina self-efflorescence grog |
| CN106769776A (en) * | 2017-01-19 | 2017-05-31 | 广西珠江啤酒有限公司 | For the quantitative approach and detection method of the regenerative permeability of filter aids of beer filtration |
| CN108905958A (en) * | 2018-07-13 | 2018-11-30 | 临江市长白山助滤剂有限公司 | A kind of preparation method of super-cell |
| CN115318244A (en) * | 2022-08-24 | 2022-11-11 | 长白朝鲜族自治县天宝硅藻土功能制品有限公司 | Raw ore filter aid for producing diatom and process preparation method thereof |
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