CN1164368C - Bauxite dressing method - Google Patents
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- CN1164368C CN1164368C CNB011314664A CN01131466A CN1164368C CN 1164368 C CN1164368 C CN 1164368C CN B011314664 A CNB011314664 A CN B011314664A CN 01131466 A CN01131466 A CN 01131466A CN 1164368 C CN1164368 C CN 1164368C
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Abstract
A dressing method of bauxite, which relates to a dressing and desiliconization method of diasporite bauxite. The method is characterized in that: under the condition of coarse grinding, the ground minerals are classified or reselected to obtain two or three size fractions, and the minerals with different size fractions are respectively selected by adopting a flotation or reselection method. Because the flotation properties of the coarse grains and the fine grains are different, the flotation environment in the coarse grain flotation process and the flotation environment in the fine grain flotation process can be respectively adapted by adjusting a medicament system, the parameters of the separation equipment and the like by adopting an independent separation method, the separation efficiency is improved, the fine grinding operation amount is greatly reduced, the ore grinding cost and energy consumption are reduced, and the recovery rate of the aluminum oxide and the quality of the concentrate are effectively improved.
Description
A kind of beneficiation method of bauxite relates to a kind of ore dressing and desiliconizing that diaspore type bauxite is produced the bauxite of alumina process that is used for, and is the dressing process for desiliconizing of the bauxite of sorting object with diaspore and rich intergrowth thereof particularly.
Diaspore type bauxite is as one of a kind of raw material of producing aluminium oxide, and great majority have aluminium oxide, silica content height, the characteristics that alumina silica ratio is low.At present, industrial is mostly mixed combining methods, the sintering process of adopting of alumina producing of raw material with diaspore bauxite more, these methods be that investment is big, flow process is complicated, energy consumption and production cost height; It is to adopt alumina producing Bayer process that minority is also arranged, though its technology has the advantage that energy consumption is low, flow process is simple, production cost is low.But adopt alumina producing Bayer process relatively stricter, generally require the raw material alumina silica ratio to be greater than 10 the requirement of raw material.Along with alumina silica ratio greater than the exhausted day by day of 10 diaspore type ore deposit ore and cut down the consumption of energy, the needs of production cost, adopt alumina producing Bayer process increasingly important.How making alumina silica ratio remove the part siliceous mineral less than 10 raw material, improve the alumina silica ratio of raw material, is the key that addresses this problem.
The floatation process of diaspore type bauxite mainly is the separation process of diaspore and siliceous mineral.The diaspore type bauxite desilication method is a lot, and froth flotation desiliconization technology is one of effective desiliconization technology of less expensive.Because gangue mineral is clay minerals such as kaolin, illite, pyrophyllite in the diaspore type bauxite, easy argillization in the ore dressing process; The easier machinery of the gangue mineral of argillization is with come-up, reduces concentrate quality; During flotation, the easier suction collecting agent of argillization gangue has increased reagent consumption; The argillization gangue easily sticks to the surface of coarse grain mineral, has a strong impact on the come-up of coarse grain, influences the effect and the concentrate quality of ore dressing.
At present, the floatation process of diaspore type bauxite has that (granularity is for about-0.074mm95%～98% with a fine grinding of bauxite, even thinner granularity) after, adopt sodium carbonate, vulcanized sodium, calgon etc. as adjusting agent, oxidized paraffin wax soap, tal fibre wet goods carry out froth flotation as collecting agent.Employing is with the once whole fine grinding process of mineral, cause the power consume height, and mostly hardness is little owing to the siliceous gangue mineral in the ore, preferentially pulverizes in ore grinding, forms sludge, be mingled with easily during flotation and carry secretly, thereby worsened the froth flotation index, made the collecting agent poor selectivity, caused the flotation desilication weak effect, be difficult to satisfy and produce needs, therefore this method is not actually used in industrial production.
In order to address the above problem, in July, 1998, application number was in the patent application of method for floating of a kind of bauxite of 98102900.0, Mohs' hardness according to main silicon mineral kaolinite, illite and pyrophillite in the hydraulic aluminium type mineral is pulverized about 2 easily, and difficult mill of diaspore hardness big (6.5～7) and heavy characteristics, after to the raw ore corase grind, promptly carry out flotation, obtain the concentrate product.Solved because the ore fine grinding, the shortcoming that sorting result is poor, power consume is high has proposed a kind of technology of improved diaspore type bauxite.It is characterized in that bauxite Milling accounts for 40%～88% condition for-0.074mm to fineness under, carrying out froth flotation, produce concentrate and chats based on the diaspore intergrowth.A part of aluminium oxide mineral composition to still containing in the chats after the flotation carries out gravity treatment again, under economic as far as possible condition the effective ingredient in the bauxite is reclaimed, and improves the income of ore-dressing technique.Chats can enter grinding machine again and raw ore carries out the regrinding and reconcentration process, also can be according to producing an actual requirement and a flotation concentrate merging as final concentrate.Since this process make flotation mog reduced by 5%～50% for the mineral ratio of-0.074mm, saved ore grinding expense and energy consumption effectively, the simultaneous oxidation aluminium recovery can improve more than 2%, makes the ore dressing and desiliconizing process obtain very big improvement.
But above-mentioned improvement is promptly to carry out sorting after corase grind, and just coarse grain is blended in the same sorting equipment with particulate and sorts.Because the special process mineralogy character of diaspore type bauxite, the particle size range of the mineral that produce behind the ore grinding are incited somebody to action very wide and the two poles of the earth are more, middle grade amount is less, and typical granularmetric composition sees Table 1.
Table 1 bauxite Milling product granularity is formed
| Sample ore grade (mm) | Sample ore 1 sample ore 2 | |
| Productive rate productive rate (%) (%) | ||
| +0.150 | 5.69 | 4.88 |
| -0.15+0.097 | 16.87 | 17.07 |
| -0.097+0.075 | 3.46 | 5.28 |
| -0.075+0.043 | 16.16 | 16.26 |
| -0.043+0.037 | 6.91 | 8.23 |
| -0.037+0.010 | 22.14 | 21.36 26.92 |
| -0.010 | 28.77 | |
| Add up to | 100 | 100 |
There are very big difference in coarse grain and particulate at aspects such as mineral composition, flotation natures, influence the effect of flotation.Because when coarse grain and particulate were mixed flotation, effect and carrying secretly of bubble population that particulate is subject to ascending current entered froth bed, cause concentrate quality to reduce; Therefore usually the specific surface energy of coarse grain is lower than particulate, and the absorption of particulate surface makes the amount of collecting agent of mineral hydrophobization and speed all greater than coarse grain.But the coarse grain come-up requires the hydrophobization degree to be higher than particulate usually, improves its hydrophobicity by adding neutral oil sometimes.Therefore when coarse grain and particulate are mixed flotation, need usually to add capacity or excessive collecting agent, the hydrophobization degree of fine-grained gangue mineral is improved and increase the mechanical entrapment amount, cause dosing to increase, concentrate quality reduces; Coarse grain also requires different pulp densities with fine particles flotation, and coarse grain requires concentration to be higher than particulate usually.Coarse grain requires different stirring intensities with fine particles flotation, and particulate requires strong stirring and turbulent flow.Coarse grain requires the lower stirring intensity and the buoyance lift distance of short mineral laden bubble.For example: adopt shallow slot flotation device, fast-flotation machine, flash flotation machine etc.And particulate adopts agitation impeller flotator or flotation column flotation more.Particulate easily coagulates mutually, needs to add dispersant usually.
For simultaneously with varigrained mineral FLOTATION SEPARATION effectively, guarantee the ore dressing yield, add reinforcement coarse grain captures such as a large amount of collecting agents, but a large amount of collecting agents has reduced the efficiency of separation of particulate, therefore be difficult to search out a kind of flotation environment sorting of suitable different grain size mineral simultaneously, have a strong impact on the recovery and the flotation efficiency of mineral.The dressing process for desiliconizing of seeking effective diaspore type bauxite is the effective way that improves the bauxite efficiency of separation.
Purpose of the present invention is exactly in order to overcome the deficiency that prior art exists in diaspore bauxite flotation process, provide a kind of and can effectively reduce power consume, reduce the influence that the mineral argillization worsens floatation process, overcome the mixed choosing of different grain size mineral and be difficult to build deficiencies such as good flotation environment, significantly reduce dosing, improve recovery rate in ore-dressing, improve a kind of bauxite floating method of separating effect.
Method of the present invention is achieved through the following technical solutions.
A kind of ore concentration of bauxite method, comprise process with agent is adjusted in grinde ore, adding and collecting agent carries out froth flotation, it is characterized in that: with bauxite levigate to granularity to-after 0.074mm accounts for 30%～80%, adopt classification or gravity ore dressing method that mineral are carried out sorting, sub-elect fineness and respectively carry out flotation for-0.074mm after accounting for 0%～70% coarse granule greater than 90 fine grained and fineness for-0.074%, its process conditions are:
A. the ore-dressing technique condition that the coarse granule that sub-elects is carried out flotation is: adopt sodium carbonate to adjust pH value to 10, adopt oxidation paraffin wax soap, tall oil, aliphatic acid, oleic acid, modified oil hydrochlorate to do collecting agent, consumption is 50g/t～400g/t, flotation time is 1～5min, output part concentrate product, the mine tailing of sorting returns regrinding and reconcentration;
B. the process conditions that the fine grained that sub-elects is carried out flotation are: adopt sodium carbonate to adjust pH value to 10, adopt the modified oil hydrochlorate to do collecting agent, consumption is 50g/t～1000g/t, and the operation flotation time is 1～15min at every turn, the output concentrate and tailings.
The control of medicament industrial condition of narrow more, the even more flotation that just helps mineral more that distributes of the grade of mineral improves the ore dressing yield after the sorting.For being evenly distributed of the granularity that makes mineral, can increase the sorting rank, consider that from the angle of economy it is good electing two to three ranks as with branch.During with Mineral Classification or three granularity ranks of gravity treatment output, fineness be respectively-7 μ m account for 100% ,-74 μ m greater than 90% and-74 μ m less than 70%.
Wherein-7 μ m can be directly as mine tailing or sorting separately;-74 μ m sort condition with above-mentioned fine grained greater than 90% grade;-74 μ m sort condition with above-mentioned coarse granule less than 70% grade.
Stage division is to adopt classifications such as hydroclone classification, cone classifier classification, spiral classifier, vortex sieve, vibratory sieve, flow type grader.
Gravity ore dressing method is to adopt sortings such as spiral chute, jigging machine, centrifuge, chute, centrifugal jig.
The tailing regrind of cobbing is it to be returned former ore mill or adopt grinding machine to pulverize separately.
The spoil reclaming of cobbing is that it is entered classification or gravity separation operation formation circulation again, or sorts with the merging of fine fraction product.
Fine particles flotation is to adopt flotation column flotation or conventional mechanical stirring-type, inflation agitation type flotation machine to sort.
Process of the present invention makes the rate of recovery of coarse grain (in-0.074mm grade) improve 5%～50%, ore grinding generation particulate (in-the 0.020mm grade) amount reduction by 10%～70%, ore grinding expense and energy consumption save 20%～50%, the simultaneous oxidation aluminium recovery can improve 2%～20%, total concentrate alumina silica ratio improves more than 0.5, reduce reagent cost more than 10%, compare remarkable in economical benefits with existing froth flotation desiliconization technology.
Description of drawings
Fig. 1 is that method of the present invention adopts closed circuit grinding-coarse grain to sort the principle process that mine tailing returns regrinding process;
Fig. 2 is that method of the present invention adopts open-circuit grinding-coarse grain to sort the principle process that mine tailing returns regrinding process;
Fig. 3 is that method of the present invention adopts closed circuit grinding-coarse grain to sort the principle process of the independent regrinding and reconcentration technology of mine tailing;
Fig. 4 is that method of the present invention adopts open-circuit grinding-coarse grain to sort the principle process of the independent regrinding and reconcentration technology of mine tailing;
Below in conjunction with embodiment method of the present invention is described further.
A kind of mineral dressing and silicon removal of bauxite new method comprises grinde ore, adding adjustment agent and collecting agent is carried out the froth flotation process that it is characterized in that: bauxite adopts classification or gravity ore dressing method to obtain varigrained product more than two or two after corase grind.When being divided into the product of two kinds of granularities, fineness is respectively-0.074mm greater than 90% particulate and-0.074mm accounts for 0%～70% coarse grain; When being divided into the product of three kinds of granularities, fineness be respectively-7 μ m ,-74 μ m greater than 90% and-74 μ m less than 70%, the coarse fraction product adopts flotation or gravity treatment beneficiation method to reclaim coarse grain diaspore rich intergrowth or monomer, output part concentrate, and the tailing regrind of cobbing selects again; Fine fraction product flotation output another part concentrate, mud (fine fraction) operation true tailings.
Corase grind is meant that mog is 30%～80%-0.074mm.
Stage division is to adopt sizing of equipments such as hydroclone classification, cone classifier classification, spiral classifier, vortex sieve, vibratory sieve, flow type grader.
Gravity ore dressing method is to adopt spiral chute, jigging machine, centrifuge, chute, centrifugal jig to obtain two or two above products.
The tailing regrind of cobbing is meant and it is returned former grinding machine or adopt grinding machine to pulverize separately.
The spoil reclaming of cobbing is that it is entered classification or gravity separation operation formation circulation once more, or sorts with the merging of fine fraction product.
Fine particles flotation is to adopt flotation column flotation or conventional mechanical stirring-type, inflation agitation type flotation machine to sort.
Bauxite of the present invention captures liking a hydraulic stone and a rich intergrowth thereof, is that monomer is different with common capture object; The diaspore overwhelming majority in the coarse fraction exists in the intergrowth mode, and the diaspore in the fine fraction exists with monomer or rich intergrowth mode.Because coarse granule and fine grained are different mineral composition and relative amount, its flotation characteristic is incomplete same, therefore floating agent system, the kind of flotation device, flotation time, the pulp density of its requirement are incomplete same, therefore coarse grain separates flotation with particulate, can distinguish preferred flotation environment separately, thus flotation cost-effectively.Having overcome coarse grain and particulate requires during flotation to float simultaneously to the specific (special) requirements of flotation environment together.Because the dressing process for desiliconizing of bauxite of the present invention, built a kind of suitable flotation environment for coarse grain diaspore rich intergrowth or monomer specially, therefore improved the trapping ability of coarse grain, the independent sorting of particulate simultaneously, help optimizing its sorting condition, established the technological process basis for obtaining the high aluminium silicon ratio concentrate.
Owing to carried out grading behind the ore grinding, the coarse grain of generation adopts fast or flash flotation, has shortened flotation time; The total consumption of collecting agent can reduce more than 10%; Fine particles flotation concentrate quality height (alumina silica ratio is about 18) has reduced fine-grained gangue and has entered concentrate, and the filtering means dehydration performance of concentrate is increased substantially.Under identical condition, the concentrate moisture content can reduce 2%-5%, and the alumina silica ratio of total concentrate can improve more than 0.5, and coarse grain captures effect and improves 5%-50%.Because coarse grain is reclaimed as far as possible, reduced the ore deposit amount of fine grinding, therefore reduced power consume 20%-50% and consumption thereof, effect is fairly obvious.
Embodiment 1
Raw material: Henan ore deposit point sample ore, its chemical analysis are (%)
| Al 2O 3 | SiO 2 | Fe 2O 3 | Alumina silica ratio |
| 63.90 | 10.96 | 6.12 | 5.83 |
Flow process is: mog accounts for 60% for-0.074mm, adopting spiral classifier is secondary with Mineral Classification, fineness be respectively-74 μ m account for 95% and-74 μ m account for 50%, output concentrate 1 after the coarse grain flotation, the coarse grain flotation tailing returns former grinding machine and regrinds, particulate adopts agitation impeller flotator one roughing, once purging selection, triple cleaning, output concentrate 2 and mine tailing respectively.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and the coarse grain flotation operation adds modified oil hydrochlorate 300g/t, and particulate is roughly selected operation and added modified oil hydrochlorate 400g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 53.05%, alumina silica ratio 11.53, Al
2O
3The rate of recovery 57.65%.The productive rate 29.12% of concentrate 2, alumina silica ratio 18.45, Al
2O
3The rate of recovery 32.76%.
Embodiment 2
Raw material and other condition are with embodiment 1.
Flow process is: mog accounts for 30% for-0.074mm, adopt the sorting of spiral chute machine to obtain thick, thin two products, fineness be respectively-74 μ m account for 90% and-74 μ m account for 20%, coarse grain flotation output concentrate 1, the coarse grain flotation tailing returns former grinding machine and regrinds, particulate adopts flotation column to sort, one roughing, recleaning, output concentrate 2 and mine tailing respectively.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and the coarse grain flotation operation adds modified oil hydrochlorate 250g/t, and particulate is roughly selected operation and added modified oil hydrochlorate 350g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 58.05%, alumina silica ratio 11.08, Al
2O
3The rate of recovery 61.77%.The productive rate 24.72% of concentrate 2, alumina silica ratio 19.84, Al
2O
3The rate of recovery 27.06%.
Embodiment 3
Raw material and other condition are with embodiment 1.
Flow process is: mog accounts for 80% for-0.074mm, adopt the cone classifier classification, fineness be respectively-74 μ m account for 95% and-74 μ m account for 30%, coarse grain flotation output concentrate 1, the coarse grain flotation tailing returns separately to be regrinded, and merges with particulate and adopts the flotation of inflation agitation type flotation machine other, one roughing, once purging selection, triple cleaning, output concentrate 2 and mine tailing respectively.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and the coarse grain flotation operation adds modified oil hydrochlorate 300g/t, and particulate is roughly selected operation and added modified oil hydrochlorate 400g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 15.05%, alumina silica ratio 11.12, Al
2O
3The rate of recovery 16.02%.The productive rate 67.45% of concentrate 2, alumina silica ratio 16.27, Al
2O
3The rate of recovery 72.95%.
Embodiment 4
Raw material and other condition are with embodiment 1.
Flow process is: mog accounts for 70% for-0.074mm, adopt the jigging machine sorting to obtain thick, thin two products, fineness be respectively-74 μ m account for 95% and-74 μ m account for 40%, coarse grain flotation output concentrate 1, the coarse grain flotation tailing returns former grinding machine regrinding and reconcentration, and particulate adopts the agitation type flotation machine flotation other, one roughing, once purging selection, triple cleaning, output concentrate 2 and mine tailing respectively.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and the coarse grain flotation operation adds modified oil hydrochlorate 230g/t, and particulate is roughly selected operation and added modified oil hydrochlorate 400g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 21.15%, alumina silica ratio 11.71, Al
2O
3The rate of recovery 22.51%.The productive rate 61.72% of concentrate 2, alumina silica ratio 16.89, Al
2O
3The rate of recovery 65.92%.
Embodiment 5
Flow process is: mog accounts for 65% for-0.074mm, adopt the centrifuge sorting to obtain thick, thin two products, fineness be respectively-74 μ m account for 95% and-74 μ m account for 50%, coarse grain flotation output concentrate 1, the coarse grain flotation tailing returns former grinding machine regrinding and reconcentration, and particulate adopts the agitation type flotation machine flotation other, one roughing, once purging selection, triple cleaning, output concentrate 2 and mine tailing respectively.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and the coarse grain flotation operation adds modified oil hydrochlorate 200g/t, and particulate is roughly selected operation and added modified oil hydrochlorate 350g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 45.75%, alumina silica ratio 11.32, Al
2O
3The rate of recovery 49.14%.The productive rate 37.12% of concentrate 2, alumina silica ratio 18.36, Al
2O
3The rate of recovery 38.87%.
Embodiment 6
Flow process is: mog accounts for 50% for-0.074mm, adopt hydroclone classification to obtain two products, fineness be respectively-74 μ m account for 95% and-74 μ m account for 40%, coarse grain flotation output concentrate 1, the coarse grain flotation tailing returns former grinding machine regrinding and reconcentration, and particulate adopts the agitation type flotation machine flotation other, one roughing, once purging selection, triple cleaning, output concentrate 2 and mine tailing respectively.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and the coarse grain flotation operation adds modified oil hydrochlorate 260g/t, and particulate is roughly selected operation and added modified oil hydrochlorate 380g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 58.49%, alumina silica ratio 10.43, Al
2O
3The rate of recovery 62.43%.The productive rate 24.53% of concentrate 2, alumina silica ratio 19.26, Al
2O
3The rate of recovery 27.72%.
Example 7
Raw material: Shanxi ore deposit point sample ore, its chemical analysis are (%)
| Al 2O 3 | SiO 2 | Fe | Alumina silica ratio |
| 65.50 | 9.93 | 3.50 | 6.59 |
Other condition is with embodiment 1.
Flow process is: mog accounts for 55% for-0.074mm, adopt 38 μ m sieve classifications to obtain two products, fineness be respectively-38 μ m account for 100% and-38 μ m account for 8%, coarse grain flotation output concentrate 1, the coarse grain flotation tailing returns former grinding machine regrinding and reconcentration, and particulate adopts the agitation type flotation machine flotation other, one roughing, once purging selection, triple cleaning, output concentrate 2 and mine tailing respectively.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and the coarse grain flotation operation adds modified oil hydrochlorate 300g/t, and particulate is roughly selected operation and added modified oil hydrochlorate 400g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 50.23%, alumina silica ratio 11.47, Al
2O
3The rate of recovery 52.94%.The productive rate 33.74% of concentrate 2, alumina silica ratio 18.29, Al
2O
3The rate of recovery 37.14%.
Embodiment 8
Raw material is with embodiment 7.Other condition is with embodiment 1.
Flow process is: mog accounts for 45% for-0.074mm, adopt 45 μ m sieve classifications to obtain two products, fineness be respectively-45 μ m account for 100% and-45 μ m account for 5%, coarse grain flotation output concentrate 1, the coarse grain flotation tailing returns former grinding machine regrinding and reconcentration, and particulate adopts the agitation type flotation machine flotation other, one roughing, once purging selection, triple cleaning, output concentrate 2 and mine tailing respectively.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and the coarse grain flotation operation adds modified oil hydrochlorate 300g/t, and particulate is roughly selected operation and added modified oil hydrochlorate 400g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 50.26%, alumina silica ratio 10.41, Al
2O
3The rate of recovery 55.17%.The productive rate 31.74% of concentrate 2, alumina silica ratio 18.47, Al
2O
3The rate of recovery 36.84%.
Embodiment 9
Raw material: Shanxi ore deposit point sample ore, its chemical analysis are (%)
| Al 2O 3 | SiO 2 | Fe | Alumina silica ratio |
| 60.43 | 13.51 | 4.12 | 4.47 |
Other condition is with embodiment 1.
Flow process is: mog accounts for 58% for-0.074mm, adopt 45 μ m sieve classifications to obtain two products, fineness be respectively-45 μ m account for 100% and-45 μ m account for 5%, coarse grain flotation output concentrate 1, the coarse grain flotation tailing returns former grinding machine regrinding and reconcentration, and particulate adopts the agitation type flotation machine flotation other, one roughing, once purging selection, triple cleaning, output concentrate 2 and mine tailing respectively.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and the coarse grain flotation operation adds modified oil hydrochlorate 180g/t, and particulate is roughly selected operation and added modified oil hydrochlorate 350g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 30.83%, alumina silica ratio 12.14, Al
2O
3The rate of recovery 34.70%.The productive rate 44.05% of concentrate 2, alumina silica ratio 14.71, Al
2O
3The rate of recovery 60.81%.
Embodiment 10
Raw material is with embodiment 9.Other condition is with embodiment 1.
Flow process is: mog accounts for 60% for-0.074mm, adopt thick, thin two products of sluicing output, fineness be respectively-74 μ m account for 95% and-74 μ m account for 40%, coarse grain flotation output concentrate 1, the coarse grain flotation tailing returns former grinding machine regrinding and reconcentration, and particulate adopts the agitation type flotation machine flotation other, one roughing, once purging selection, triple cleaning, output concentrate 2 and mine tailing respectively.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and the coarse grain flotation operation adds modified oil hydrochlorate 200g/t, and particulate is roughly selected operation and added modified oil hydrochlorate 400g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 31.15%, alumina silica ratio 11.34, Al
2O
3The rate of recovery 35.58%.The productive rate 44.03% of concentrate 2, alumina silica ratio 16.21, Al
2O
3The rate of recovery 50.18%.
Embodiment 11
Raw material and other condition are with embodiment 1.
Flow process is: mog accounts for 55% for-0.074mm, adopt the sorting of spiral chute machine to obtain thick, thin, mud three products, fineness is respectively-74 μ m and accounts for 40% ,-74 μ m and account for 95% and-7 μ m and account for 100%, coarse grain flotation output concentrate 1, the coarse grain flotation tailing returns former grinding machine and regrinds, and particulate adopts flotation column to sort one roughing, recleaning, difference output concentrate 2, mud is directly as mine tailing.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and the coarse grain flotation operation adds modified oil hydrochlorate 300g/t, and particulate is roughly selected operation and added modified oil hydrochlorate 400g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 50.47%, alumina silica ratio 12.04, Al
2O
3The rate of recovery 54.10%.The productive rate 30.74% of concentrate 2, alumina silica ratio 18.61, Al
2O
3The rate of recovery 32.78%.
Example 12
Raw material and other condition are with embodiment 1.
Flow process is: mog accounts for 45% for-0.074mm, adopt the sorting of spiral chute machine to obtain thick, thin, mud three products, fineness is respectively-74 μ m and accounts for 30% ,-74 μ m and account for 95% and-7 μ m and account for 100%, coarse grain adopts spiral chute to sort output concentrate 1 again, the coarse grain mine tailing returns former grinding machine and regrinds, and particulate adopts flotation column to sort one roughing, triple cleaning, difference output concentrate 2, mud is directly as mine tailing.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and particulate is roughly selected operation and added modified oil hydrochlorate 400g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 15.39%, alumina silica ratio 9.07, Al
2O
3The rate of recovery 15.90%.The productive rate 65.02% of concentrate 2, alumina silica ratio 16.73, Al
2O
3The rate of recovery 70.04%.
Example 13
Raw material and other condition are with embodiment 1.
Flow process is: mog accounts for 55% for-0.074mm, adopt vortex sieve classification output two products, fineness be respectively-74 μ m account for 40% and-74 μ m account for 95%, coarse grain flotation output concentrate 1, the coarse grain mine tailing returns former grinding machine and regrinds, particulate adopts flotation column to sort, one roughing, triple cleaning, output concentrate 2 and mine tailing respectively.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and the coarse grain flotation operation adds modified oil hydrochlorate 280g/t, and particulate is roughly selected operation and added modified oil hydrochlorate 400g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 55.09%, alumina silica ratio 11.07, Al
2O
3The rate of recovery 57.91%.The productive rate 28.76% of concentrate 2, alumina silica ratio 17.47, Al
2O
3The rate of recovery 33.05%.
Example 14
Raw material and other condition are with embodiment 1.
Flow process is: mog accounts for 55% for-0.074mm, adopt the sorting of centrifugal jig machine to obtain thick, thin two products, fineness be respectively-74 μ m account for 40% and-74 μ m account for 95%, coarse grain flotation output concentrate 1, the coarse grain mine tailing returns former grinding machine and regrinds, particulate adopts flotation column to sort, one roughing, triple cleaning, output concentrate 2 respectively.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and the coarse grain flotation operation adds modified oil hydrochlorate 230g/t, and particulate is roughly selected operation and added modified oil hydrochlorate 400g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 45.78%, alumina silica ratio 9.07, Al
2O
3The rate of recovery 48.19%.The productive rate 37.12% of concentrate 2, alumina silica ratio 17.63, Al
2O
3The rate of recovery 40.32%.
Example 15
Raw material and other condition are with embodiment 1.
Flow process is: mog accounts for 55% for-0.074mm, adopt the vibratory sieve classification to obtain two products, fineness be respectively-74 μ m account for 40% and-74 μ m account for 95%, coarse grain flotation output concentrate 1, the coarse grain mine tailing returns former grinding machine and regrinds, particulate adopts flotation column to sort, one roughing, triple cleaning, output concentrate 2 and mine tailing respectively.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and the coarse grain flotation operation adds modified oil hydrochlorate 200g/t, and particulate is roughly selected operation and added modified oil hydrochlorate 400g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 43.17%, alumina silica ratio 11.39, Al
2O
3The rate of recovery 46.82%.The productive rate 39.26% of concentrate 2, alumina silica ratio 18.17, Al
2O
3The rate of recovery 33.51%.
Example 16
Raw material and other condition are with embodiment 1.
Flow process is: mog accounts for 55% for-0.074mm, adopt the classification of flow type grader to obtain thick, thin two products, fineness be respectively-74 μ m account for 40% and-74 μ m account for 95%, coarse grain flotation output concentrate 1, the coarse grain mine tailing returns former grinding machine and regrinds, particulate adopts flotation column to sort, one roughing, triple cleaning, output concentrate 2 and mine tailing respectively.
Regime of agent: ore pulp adopts sodium carbonate to be adjusted to pH10, and the coarse grain flotation operation adds modified oil hydrochlorate 300g/t, and particulate is roughly selected operation and added modified oil hydrochlorate 400g/t and calgon 30g/t, scans operation and adds modified oil hydrochlorate 50g/t.
During closed circuit flow process, concentrate 1 productive rate 50.32%, alumina silica ratio 11.28, Al
2O
3The rate of recovery 53.27%.The productive rate 32.16% of concentrate 2, alumina silica ratio 17.82, Al
2O
3The rate of recovery 36.05%.
Claims (7)
1. ore concentration of bauxite method, comprise with grinde ore, add to adjust agent and collecting agent carry out froth flotation it is characterized in that with bauxite levigate to granularity for-after 0.074mm accounts for 30%～80%, adopt classification or gravity ore dressing method that mineral are carried out sorting, sub-elect fineness and respectively carry out flotation for-0.074mm after accounting for 0%70% coarse granule greater than 90% fine grained and fineness for-0.074mm, the process conditions of its flotation are:
A. the ore-dressing technique condition that the coarse granule that sub-elects is carried out flotation is: adopt sodium carbonate to adjust pH value to 10, adopt the modified oil hydrochlorate to do collecting agent, consumption is 50g/t～400g/t, and flotation time is 1～5min, output part concentrate product, the tailing regrind of sorting selects again;
B. the fine grained that sub-elects is carried out flotation, process conditions are: adopt sodium carbonate to adjust pH value to 10, adopt the modified oil hydrochlorate to do collecting agent, consumption is 50g/t～1000g/t, and flotation time is 1～15min, the output concentrate and tailings.
2. according to the beneficiation method of the described a kind of bauxite of claim 1, it is characterized in that with bauxite levigate to granularity to-after 0.074mm accounts for 30%～80%, adopt classification or gravity ore dressing method that mineral are carried out sorting, during three granularity ranks of output, fineness be respectively-7 μ m account for 100% ,-74 μ m greater than 90% and-74 μ m less than 70%; Fineness accounts for 0%～70% coarse granule and carries out flotation respectively for-0.074mm greater than 90% fine grained and fineness for-0.074mm, and wherein-7 μ m can be directly as mine tailing;-74 μ m sort condition with the described fine grained level of claim 1 floatation process condition greater than 90% grade;-74 μ m sort the floatation process of condition with the described coarse granule level of claim greater than 70% grade.
3. the beneficiation method of a kind of bauxite according to claim 1 is characterized in that: the stage division behind the ore grinding is to adopt classifications such as hydrocyclone, cone classifier, spiral classifier, vortex sieve, vibratory sieve, flow type grader.
4. the beneficiation method of a kind of bauxite according to claim 1 is characterized in that: the gravity ore dressing method behind the ore grinding is to adopt sortings such as spiral chute, jigging machine, centrifuge, chute, centrifugal jig.
5. the beneficiation method of a kind of bauxite according to claim 1 is characterized in that: the tailing regrind of cobbing is it to be returned former grinding machine or adopt grinding machine to pulverize separately.
6. the beneficiation method of a kind of bauxite according to claim 1 is characterized in that: the spoil reclaming of cobbing is it to be entered classification again or the gravity separation operation forms circulation, or merges with the fine fraction product and to sort.
7. the beneficiation method of a kind of bauxite according to claim 1 is characterized in that: fine particles flotation is to adopt flotation column flotation or conventional mechanical stirring-type, inflation agitation type flotation machine to sort.
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Cited By (1)
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| CN100448545C (en) * | 2005-09-23 | 2009-01-07 | 贵阳铝镁设计研究院 | High-iron gibbsite material grinding process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100448545C (en) * | 2005-09-23 | 2009-01-07 | 贵阳铝镁设计研究院 | High-iron gibbsite material grinding process |
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