CN101444762A - Method for selective flocculent desiliconization from low alumina-silicon ratio alumyte by using high effective grinding ore - Google Patents
Method for selective flocculent desiliconization from low alumina-silicon ratio alumyte by using high effective grinding ore Download PDFInfo
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- CN101444762A CN101444762A CNA2008101437458A CN200810143745A CN101444762A CN 101444762 A CN101444762 A CN 101444762A CN A2008101437458 A CNA2008101437458 A CN A2008101437458A CN 200810143745 A CN200810143745 A CN 200810143745A CN 101444762 A CN101444762 A CN 101444762A
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- silicon ratio
- alumyte
- low alumina
- ore
- ratio alumyte
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 30
- 239000010703 silicon Substances 0.000 title claims abstract description 30
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 44
- 239000012141 concentrate Substances 0.000 claims abstract description 23
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 22
- 239000013505 freshwater Substances 0.000 claims abstract description 18
- 239000008394 flocculating agent Substances 0.000 claims abstract description 6
- 238000004062 sedimentation Methods 0.000 claims description 23
- 229920000881 Modified starch Polymers 0.000 claims description 21
- 239000004368 Modified starch Substances 0.000 claims description 21
- 235000019426 modified starch Nutrition 0.000 claims description 21
- 238000005189 flocculation Methods 0.000 claims description 16
- 230000016615 flocculation Effects 0.000 claims description 16
- 229920002401 polyacrylamide Polymers 0.000 claims description 12
- 238000013019 agitation Methods 0.000 claims description 10
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 8
- 229920002472 Starch Polymers 0.000 claims description 8
- 235000019698 starch Nutrition 0.000 claims description 8
- 239000008107 starch Substances 0.000 claims description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 4
- 238000006683 Mannich reaction Methods 0.000 claims description 4
- 229910002651 NO3 Inorganic materials 0.000 claims description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 4
- RDHPKYGYEGBMSE-UHFFFAOYSA-N bromoethane Chemical compound CCBr RDHPKYGYEGBMSE-UHFFFAOYSA-N 0.000 claims description 4
- 239000003153 chemical reaction reagent Substances 0.000 claims description 4
- 125000001453 quaternary ammonium group Chemical group 0.000 claims description 4
- GFLJTEHFZZNCTR-UHFFFAOYSA-N 3-prop-2-enoyloxypropyl prop-2-enoate Chemical compound C=CC(=O)OCCCOC(=O)C=C GFLJTEHFZZNCTR-UHFFFAOYSA-N 0.000 claims description 3
- 229920000371 poly(diallyldimethylammonium chloride) polymer Polymers 0.000 claims description 3
- 238000003756 stirring Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract 6
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 abstract 4
- 239000010802 sludge Substances 0.000 abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 34
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 21
- 229910001570 bauxite Inorganic materials 0.000 description 17
- 239000000377 silicon dioxide Substances 0.000 description 17
- 238000011084 recovery Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 230000003311 flocculating effect Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 229910001648 diaspore Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000000701 coagulant Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a method for selective flocculent desiliconization from low alumina-silicon ratio alumyte by using high effective grinding ore. The method comprises the following steps: grinding the ore to be 0.074 millimeter accounting for 80 to 98 percent, and adding sodium carbonate during grinding; then adding fresh water and flocculating agent into the mixture, and settling the mixture and removing sludge after the mixture is fully scattered by stirring; returning ore concentrate after being removed with the sludge to regrind to be 0.074 millimeter accounting for 90 to 98 percent, and adding the sodium carbonate during grinding; and finally adding the fresh water and the flocculating agent into the mixture again, and settling the mixture and removing the sludge after the mixture is fully scattered by stirring. The method has the advantages of high selecting indexes, good separating effect, simple flow and low cost. After the method is adopted, when alumyte the aluminum-silicon ratio of which is 4.19 is treated, alumyte concentrate the reclaiming ratio of which is 74.32 percent and the aluminum-silicon ratio of which is 6.52 can be obtained; and after the method is adopted, when alumyte the aluminum-silicon ratio of which is 4.16 is treated, alumyte concentrate the reclaiming ratio of which is 79.54 percent and the aluminum-silicon ratio of which is 6.31 can be obtained.
Description
Technical field
The invention belongs to ore dressing field, relate to a kind of desilication method of bauxite, particularly adopt the method for efficient ore grinding from the low alumina-silicon ratio alumyte selective flocculation desiliconisation.
Background technology
China's bauxite obviously has the characteristics of high alumina, high silicon, low iron.Though, Al in the bauxite of China
2O
3Content than higher, but since ore in contain higher SiO simultaneously
2, so the alumina silica ratio of ore is totally lower.Account in 255 mining areas of 7 provinces and regions such as Shanxi, Henan, Guangxi, Guizhou, Shandong and Sichuan, Yunnan of China's bauxite gross reserves 96%, bauxite average grade (mass fraction) is: Al
2O
361.99%, SiO
210.4%, Fe
2O
37.73%.Average alumina silica ratio is: 5.96, and it is 4-6 that the alumina silica ratio of nearly half reserves bauxite is arranged.The stripping of diaspore needs higher temperature, pressure and causticity to compare condition; Add because of the alumina silica ratio of ore is low, with this ore during as the raw material of producing aluminium oxide by bayer, deficiency in economic performance.Therefore, the bauxite resource characteristics of indissoluble, high silicon, low alumina silica ratio have influenced China's aluminum oxide industry to a great extent, and even whole aluminium industrial expansion.
Summary of the invention
The purpose of this invention is to provide a kind of efficient ore grinding method with high polymer coagulant selective flocculation sedimentation desiliconization from low alumina-silicon ratio alumyte that adopts, overcome the deficiencies in the prior art, the sorting index height, good separating effect, flow process is simple, and is with low cost.
The objective of the invention is to realize in the following manner.
A kind of method that adopts efficient ore grinding from the low alumina-silicon ratio alumyte selective flocculation desiliconisation may further comprise the steps:
With low alumina-silicon ratio alumyte ore comminution, in grinding process, add sodium carbonate; Add fresh water again, the sedimentation desliming obtains rough concentrate; Rough concentrate returned regrind, in grinding process, add sodium carbonate again; Add fresh water again, the sedimentation desliming obtains final concentrate.Before twice sedimentation desliming, all add flocculant.
Described flocculant is modified starch, modified polyacrylamide or PDDA.
Described modified starch is to be initator with the ammonium ceric nitrate, and starch and acrylamide reacted 3 hours under 30～40 ℃ temperature, obtained acrylamide graft starch; Described modified polyacrylamide is after passing through Mannich reaction with polyacrylamide, to carry out quaternised modified obtaining with the bromoethane for quaternary ammonium reagent.
Described flocculant is modified starch the best.
Described flocculating agent molecule amount is 10～1,000 ten thousand, adds the flocculant of 0.1-10 gram/ton before the sedimentation desliming first time; The flocculant that adds 0.1-20 gram/ton before the desliming of sedimentation for the second time.
The flocculant consumption is 1 gram/ton before the desliming of sedimentation for the first time; The flocculant consumption is that 5 gram/tons are best before the desliming of sedimentation for the second time.
For the first time during comminution with the ore comminution to-0.074mm, comminution to the low alumina-silicon ratio alumyte of-0.074mm will account for 80%～98% of total low alumina-silicon ratio alumyte quality; For the second time during comminution with the ore comminution to-0.074mm, comminution will account for 90%～98% of total low alumina-silicon ratio alumyte quality to the low alumina-silicon ratio alumyte of-0.074mm, ore grinding adopts the mechanical agitation mill.
Add for twice fresh water all to the ore pulp volumetric concentration be 8%～15%.
The sodium carbonate that all adds 60-5000 gram/ton in twice grinding process.
The sodium carbonate the best that all adds 2500 gram/tons in twice grinding process.
The concrete technology of the present invention is as follows:
A, ore is milled to-0.074mm accounts for 80%～98%, adds the sodium carbonate of 60-5000 gram/ton in grinding process, and sodium carbonate amount is the best with 2500 gram/tons; Ore grinding adopts the mechanical agitation mill;
B, adding fresh water to ore concentration is about 8～15%, adds the flocculant of 0.1-10 gram/ton, the flocculant consumption is the best with 1 gram/ton; Stirring makes it fully to disperse back sedimentation desliming, obtains rough concentrate;
C, the concentrate after one section desliming returns to be regrinded, be milled to-0.074mm accounts for 90%～98%, adds the sodium carbonate of 60-5000 gram/ton in grinding process, and sodium carbonate amount is the best with 2500 gram/tons, and grinding attachment employing ZZ-45 type mechanical agitation is ground;
D adds fresh water to ore concentration about 8～15%, adds the flocculant of 0.1-20 gram/ton, and the flocculant consumption is the best with 5 gram/tons; Stirring makes it fully to disperse back sedimentation desliming, obtains final concentrate.
Flocculant can adopt modified starch, modified polyacrylamide, PDDA etc.Modified starch is to be initator with the ammonium ceric nitrate, and starch and acrylamide reacted 3 hours under 30～40 ℃ temperature, obtained acrylamide graft starch; Modified polyacrylamide is after passing through Mannich reaction with polyacrylamide, to carry out quaternised modified with the bromoethane for quaternary ammonium reagent.
The flocculating agent molecule amount is 10～1,000 ten thousand.
The flocculant modified starch is best.
After adopting this method, processing raw ore alumina silica ratio is 4.19 bauxite, and can obtain the rate of recovery is 74.32%, and alumina silica ratio is 6.52 bauxite concentrate; Handle the raw ore alumina silica ratio and be 4.16 bauxite, adopt this method after, can obtain the rate of recovery is 79.54%, alumina silica ratio is 6.31 bauxite concentrate.
The present invention has overcome previous methods operating condition harshness, and weak effect brings very shortcoming such as big difficulty to follow-up work, develops a kind of sorting index height, good separating effect, and flow process is simple, new method with low cost.This process is applied to flocculation technique the diaspore ore dressing innovatively, forms the brand-new technological process of a cover.It greatly reduces the granularity lower limit that traditional floatation process is handled sample ore, and with low cost, and is low for China's alumina silica ratio, and the utilization of the abundant bauxite resource that disseminated grain size is thin has very important significance.Applying of it can promote China's aluminum oxide industry and even whole aluminium industrial expansion to a great extent, has very big economic worth.
The specific embodiment
Following examples are intended to further specify the present invention, rather than limitation of the present invention.
Embodiment 1
Adopt this method that Henan difficult mill low alumina-silicon ratio alumyte is carried out the flocculating setting test.Al in these mineral
2O
3Content is 61.87, SiO
2Content is 14.76, and alumina silica ratio is 4.19.
In ore, add 2500g/t sodium carbonate, adopt mechanical agitation to grind to be milled to-0.074mm accounts for 95%; Add fresh water to ore concentration about 10%, (modified starch is to be initator with the ammonium ceric nitrate to the modified starch of adding 1 gram/ton, and starch and acrylamide reacted 3 hours under 30～40 ℃ temperature, obtained acrylamide graft starch.), stir and make it fully to disperse back sedimentation desliming; Concentrate returns to be regrinded, and adds the sodium carbonate of 2500 gram/tons, be milled to-0.074mm accounts for 98%; Add fresh water to ore concentration about 10%, add the modified starch (method of modifying is the same) of 5 gram/tons, stir and make it fully to disperse back sedimentation desliming.
After adopting this method, can obtain the rate of recovery is 74.32%, and alumina silica ratio is 6.52 bauxite concentrate.
Embodiment 2
Adopt this method that Shanxi difficult mill low alumina-silicon ratio alumyte is carried out the selective flocculation test.Al in these mineral
2O
3Content is 64.18, SiO
2Content is 15.41, and alumina silica ratio is 4.16.
In ore, add 2500g/t sodium carbonate, adopt mechanical agitation to grind to be milled to-0.074mm accounts for 95%; Add fresh water to ore concentration about 10%, add the modified starch of 1.5 gram/tons, (method of modifying of modified starch is with embodiment 1) stirs and makes it fully to disperse back sedimentation desliming; Concentrate returns to be regrinded, and adds the sodium carbonate of 2500 gram/tons, be milled to-0.074mm accounts for 98%; Add fresh water to ore concentration about 10%, add the modified starch (method of modifying is the same) of 6 gram/tons, stir and make it fully to disperse back sedimentation desliming.
After adopting this method, can obtain the rate of recovery is 79.54%, and alumina silica ratio is 6.31 bauxite concentrate.
Embodiment 3
Adopting this method pair and embodiment 1 identical ore to carry out flocculating setting tests.
In ore, add 4500g/t sodium carbonate when adopting the mechanical agitation mill, adopt mechanical agitation to grind to be milled to-0.074mm accounts for 95%; Add the modified starch (method of modifying of modified starch is with embodiment 1) that adds 0.2 gram/ton behind the fresh water again, stir and make it fully to disperse back sedimentation desliming; Concentrate returns to be regrinded, and adds the sodium carbonate of 4500 gram/tons, adds the modified starch (method of modifying is the same) that adds 0.5 gram/ton behind the fresh water again, and all the other steps and condition are with embodiment 1.
After adopting this method, can obtain the rate of recovery is 60.04%, and alumina silica ratio is 6.31 bauxite concentrate.
Embodiment 4
Adopting this method pair and embodiment 1 identical ore to carry out flocculating setting tests.
In ore, add 650g/t sodium carbonate when adopting the mechanical agitation mill, adopt mechanical agitation to grind to be milled to-0.074mm accounts for 95%; Add the modified starch (method of modifying of modified starch is with embodiment 1) that adds 8 gram/tons behind the fresh water again, stir and make it fully to disperse back sedimentation desliming; Concentrate returns to be regrinded, and adds the sodium carbonate of 650 gram/tons, adds the modified starch (method of modifying is the same) that adds 15 gram/tons behind the fresh water again, and all the other steps and condition are with embodiment 1.
After adopting this method, can obtain the rate of recovery is 82.64%, and alumina silica ratio is 5.1 bauxite concentrate.
Embodiment 5
Flocculant is modified polyacrylamide (modified polyacrylamide is after passing through Mannich reaction with polyacrylamide, to carry out quaternised modified with the bromoethane for quaternary ammonium reagent), and all the other steps and condition are with embodiment 1.
After adopting this method, can obtain the rate of recovery is 67.48%, and alumina silica ratio is 6.29 bauxite concentrate.
Claims (10)
1, a kind of method that adopts efficient ore grinding from the low alumina-silicon ratio alumyte selective flocculation desiliconisation may further comprise the steps:
With low alumina-silicon ratio alumyte ore comminution, in grinding process, add sodium carbonate; Add fresh water again, the sedimentation desliming obtains rough concentrate; Rough concentrate returned regrind, in grinding process, add sodium carbonate again; Add fresh water again, the sedimentation desliming obtains final concentrate, it is characterized in that, all adds flocculant before twice sedimentation desliming.
2, a kind of method that adopts efficient ore grinding from the low alumina-silicon ratio alumyte selective flocculation desiliconisation according to claim 1 is characterized in that described flocculant is modified starch, modified polyacrylamide or PDDA.
3, a kind of method that adopts efficient ore grinding from the low alumina-silicon ratio alumyte selective flocculation desiliconisation according to claim 2, it is characterized in that, described modified starch is to be initator with the ammonium ceric nitrate, starch and acrylamide reacted 3 hours under 30～40 ℃ temperature, obtained acrylamide graft starch; Described modified polyacrylamide is after passing through Mannich reaction with polyacrylamide, to carry out quaternised modified obtaining with the bromoethane for quaternary ammonium reagent.
4, according to claim 1 or 2 or 3 described a kind of methods that adopt efficient ore grinding from the low alumina-silicon ratio alumyte selective flocculation desiliconisation, it is characterized in that described flocculant is a modified starch.
5, a kind of method that adopts efficient ore grinding from the low alumina-silicon ratio alumyte selective flocculation desiliconisation according to claim 4 is characterized in that, described flocculating agent molecule amount is 10～1,000 ten thousand, adds the flocculant of 0.1-10 gram/ton before the sedimentation desliming first time; The flocculant that adds 0.1-20 gram/ton before the desliming of sedimentation for the second time.
6, a kind of method that adopts efficient ore grinding from the low alumina-silicon ratio alumyte selective flocculation desiliconisation according to claim 5 is characterized in that, adds the flocculant of 1 gram/ton before the desliming of sedimentation for the first time; Add 5 gram/ton flocculants before the desliming of sedimentation for the second time.
7, a kind of new method that adopts efficient ore grinding from the low alumina-silicon ratio alumyte selective flocculation desiliconisation according to claim 6, when it is characterized in that for the first time comminution with the ore comminution to-0.074mm, comminution to the low alumina-silicon ratio alumyte of-0.074mm will account for 80%～98% of total low alumina-silicon ratio alumyte quality; For the second time during comminution with the ore comminution to-0.074mm, comminution will account for 90%～98% of total low alumina-silicon ratio alumyte quality to the low alumina-silicon ratio alumyte of-0.074mm, ore grinding adopts the mechanical agitation mill.
8, a kind of new method that adopts efficient ore grinding from the low alumina-silicon ratio alumyte selective flocculation desiliconisation according to claim 7 is characterized in that, add for twice fresh water all to the ore pulp volumetric concentration be 8%～15%.
9, a kind of new method that adopts efficient ore grinding from the low alumina-silicon ratio alumyte selective flocculation desiliconisation according to claim 8 is characterized in that, all adds the sodium carbonate of 60-5000 gram/ton in twice grinding process.
10, a kind of new method that adopts efficient ore grinding from the low alumina-silicon ratio alumyte selective flocculation desiliconisation according to claim 9 is characterized in that, all adds the sodium carbonate of 2500 gram/tons in twice grinding process.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101437458A CN101444762A (en) | 2008-11-27 | 2008-11-27 | Method for selective flocculent desiliconization from low alumina-silicon ratio alumyte by using high effective grinding ore |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105013622A (en) * | 2015-08-17 | 2015-11-04 | 平顶山华兴浮选工程技术服务有限公司 | Depressor for bauxite direct flotation desilicication and application thereof |
| CN107140761A (en) * | 2017-04-21 | 2017-09-08 | 中铁四局集团有限公司 | A kind of mud-water separation method of diaphram wall discarded slurry |
| CN107140721A (en) * | 2017-04-21 | 2017-09-08 | 中铁四局集团有限公司 | A kind of discarded slurry mud-water separation preparation and its application process |
| CN107265826A (en) * | 2017-08-09 | 2017-10-20 | 安徽中铁工程材料科技有限公司 | A kind of new high solid loading discarded slurry mud-water separation material and preparation method thereof |
-
2008
- 2008-11-27 CN CNA2008101437458A patent/CN101444762A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105013622A (en) * | 2015-08-17 | 2015-11-04 | 平顶山华兴浮选工程技术服务有限公司 | Depressor for bauxite direct flotation desilicication and application thereof |
| CN107140761A (en) * | 2017-04-21 | 2017-09-08 | 中铁四局集团有限公司 | A kind of mud-water separation method of diaphram wall discarded slurry |
| CN107140721A (en) * | 2017-04-21 | 2017-09-08 | 中铁四局集团有限公司 | A kind of discarded slurry mud-water separation preparation and its application process |
| CN107265826A (en) * | 2017-08-09 | 2017-10-20 | 安徽中铁工程材料科技有限公司 | A kind of new high solid loading discarded slurry mud-water separation material and preparation method thereof |
| CN107265826B (en) * | 2017-08-09 | 2020-09-25 | 安徽中铁工程材料科技有限公司 | Novel high-solid-content waste slurry mud-water separation material and preparation method thereof |
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