CN103949350B - A kind of dusting cover of low grade silico-calcium matter collophane stage flotation method of regrinding - Google Patents

A kind of dusting cover of low grade silico-calcium matter collophane stage flotation method of regrinding Download PDF

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CN103949350B
CN103949350B CN201410170737.8A CN201410170737A CN103949350B CN 103949350 B CN103949350 B CN 103949350B CN 201410170737 A CN201410170737 A CN 201410170737A CN 103949350 B CN103949350 B CN 103949350B
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flotation
reverse
concentrate
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CN103949350A (en
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李丰
宋文义
刘升林
杨勇
刘国举
刘星强
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Bluestar Lehigh Engineering Institute
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Abstract

A kind of dusting cover of low grade silico-calcium matter collophane stage flotation method of regrinding, the method is by levigate low grade silico-calcium matter collophane, add water and make raw ore slurry, the raw ore slurry of milled is sieved with dusting cover, the undersize material after classification is placed in floatation equipment to carry out direct flotation and roughly selects; Undersize is roughly selected concentrate and is carried out reverse flotation, obtains undersize concentrate through reverse flotation and mine tailing; Undersize reverse flotation rougher tailings carries out reverse flotation and selects; On-the-sieve material is carried out direct flotation and is roughly selected after Regrinding, obtains oversize direct flotation and roughly selects concentrate and tailings; Oversize is roughly selected concentrate and is carried out reverse flotation; Oversize reverse flotation rougher tailings carries out reverse flotation and selects. Fine screening classification of the present invention, material after primary grinding is after fine screening classification, realize the sorting of narrow rank material, the lower independent sorting of fine particle stage material of sieve, on-the-sieve material is after the monomer dissociation of regrinding, flotation separately, greatly reduces the influence of flotation of fine particle stage material to coarse fraction material, and has improved the rate of recovery of output aggregate.

Description

A kind of dusting cover of low grade silico-calcium matter collophane stage flotation method of regrinding
Technical field
The invention belongs to technical field of mineral processing, particularly a kind of dusting cover of low grade silico-calcium matter collophane stage flotation method of regrinding.
Background technology
China's phosphate rock resource is abundant, and resource base reserves occupy the second in the world, but rich ore is few, and average grade is only 17% left and right, and difficult ore dressing is many, and easily ore dressing is few. In proved reserves, the appositional pattern phosphorite (collophane) of difficult choosing accounts for 85% of gross reserves, and majority is middle poor value. Must remove after carbonate and silicate impurity sorting of this class ore simultaneously, just can reach the requirement of composting, wherein flotation is most important dressing method, and the floatation process of collophane mainly contains single reverse floatation process, n-reverse floatation process, trans-direct floatation process, two reverse floatation process at present. Wherein single reverse floatation process is applicable to high-carbon hydrochlorate low silicon content rock phosphate in powder, is under weak acidic medium, to suppress phosphorus ore thing, then uses selective strong collecting agent emersion carbonate mineral; Other three kinds of techniques are mainly used in silicon-calcium (or calcium-silicon) matter rock phosphate in powder, its essence is the organic assembling of " carbonate flotation " and " silicate flotation " two kinds of technology, uses " two step floatation process " to get rid of respectively carbonate and the silicate impurity in rock phosphate in powder. Determine still " two anti-" technology of employing " just-anti-", " anti--just " according to processed ore properties, the ground such as Yunnan, Hubei collophane belongs to silico-calcium matter collophane more, grade is lower, and disseminated grain size is thinner, some need to be finely ground to-0.074mm is more than 90%, could realize monomer dissociation, because the hardness of valuable mineral and gangue mineral is different, in grinding process, have selective milling, the mineral that some hardness is lower occur overground, have finally produced a large amount of secondary slimes. The probability of fine mineral and bubble hit, adhesion is lower, affect flotation rate, when thin particle and thick particle and mix with adhesion particle, fine needs more collecting agent and flotation time, all set compared with the flotation of coarse fraction material being applicable to but the flotation conditions using is general, because fine grained mineral hydrophobicity is inadequate, fine grained mineral are easily stayed in mine tailing, affect concentrate grade and the rate of recovery; And because fine mineral specific surface energy is large, be easily adsorbed on the mineral surfaces of suitable flotation granularity, reduce the floatability of these mineral.
Summary of the invention
Technical problem to be solved by this invention is to have the problem that can produce a large amount of secondary slimes after fine grinding and can worsen floatation process for current low grade silico-calcium matter collophane, a kind of dusting cover of the new low grade silico-calcium matter collophane stage flotation method of regrinding is provided, reaches the effect that sub-elects qualified products with lower beneficiation cost.
Technical problem to be solved by this invention is to realize by following technical scheme. The present invention is a kind of dusting cover of low grade silico-calcium matter collophane stage flotation method of regrinding, and is characterized in, its step is as follows:
(1) the levigate part to fineness-0.074mm of low grade silico-calcium matter collophane is accounted for to 60 ~ 80% of whole material gross weights, then adding water and making weight concentration is 30 ~ 50% raw ore slurry;
(2) raw ore slurry of ore grinding is sieved with dusting cover, screening operation concentration is 30-50%, the granularity of classification 0.074mm, 0.063mm, 0.045mm respectively, and the lower weight concentration of sieve is adjusted to 15 ~ 35%, and on sieve, weight concentration is 45 ~ 65%;
(3) material under sieve is placed in to floatation equipment, low whipping speed is under 1200 ~ 2100rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 1000-3000g/t, add again waterglass to stir, the addition of waterglass is 6000 ~ 8000g/t, add again direct flotation collecting agent, and stir, the addition of direct flotation collecting agent is 1800 ~ 2500g/t raw ore, then carries out direct flotation and roughly selects, and obtains undersize direct flotation and roughly selects concentrate and tailings;
(4) undersize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1200 ~ 2100rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 6000-8000g/t, add again collecting agent in reverse floatation, and stir, the addition of collecting agent in reverse floatation is 300 ~ 500g/t, then carries out reverse flotation and roughly selects, and obtains undersize concentrate through reverse flotation and mine tailing;
(5) be under 1200 ~ 2100rpm condition by undersize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 500-1000g/t, then carries out reverse flotation and selects, obtains undersize reverse flotation concentrate selection and mine tailing again;
(6) by on-the-sieve material after Regrinding, the part of fineness-0.074mm accounts for 80 ~ 95% of whole material gross weights, then adding water and making weight concentration is 15 ~ 35% raw ore slurry;
(7) material of the upper milled of sieve is placed in to floatation equipment, low whipping speed is under 1200 ~ 2100rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 800-2000g/t, add again waterglass to stir, the addition of waterglass is 4000 ~ 7000g/t, adding direct flotation collecting agent, and stir, the addition of direct flotation collecting agent is 1000 ~ 2000g/t, then carries out direct flotation and roughly selects, and obtains oversize direct flotation and roughly selects concentrate and tailings;
(8) oversize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1200 ~ 2100rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 5000-7000g/t, add again collecting agent in reverse floatation, and stir, the addition of collecting agent in reverse floatation is 300 ~ 500g/t, then carries out reverse flotation and roughly selects, and obtains oversize concentrate through reverse flotation and mine tailing;
(9) be under 1200 ~ 2100rpm condition by oversize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 500 ~ 1000g/t, then carries out reverse flotation and selects, obtains oversize reverse flotation concentrate selection and mine tailing again.
The dusting cover of the low grade silico-calcium matter collophane of the present invention stage flotation method of regrinding, its preferred technical scheme steps is as follows:
(1) the levigate part to fineness-0.074mm of low grade silico-calcium matter collophane is accounted for to 65 ~ 75% of whole material gross weights, then adding water and making weight concentration is 35 ~ 45% raw ore slurry;
(2) raw ore slurry of ore grinding is sieved with dusting cover, screening operation concentration is 35 ~ 45%, the granularity of classification 0.074mm, 0.063mm, 0.045mm respectively, and the lower weight concentration of sieve is adjusted to 20 ~ 30%, and on sieve, weight concentration is 50 ~ 60%;
(3) material under sieve is placed in to floatation equipment, low whipping speed is under 1500 ~ 1800rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 1500-2500g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 6500 ~ 7500g/t, add again direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 2000 ~ 2200g/t raw ore, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains undersize direct flotation and roughly selects concentrate and tailings;
(4) undersize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1500 ~ 1800rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 6500 ~ 7500g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 350 ~ 450g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains undersize concentrate through reverse flotation and mine tailing;
(5) be under 1500 ~ 1800rpm condition by undersize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 700-800g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains undersize reverse flotation concentrate selection and mine tailing again;
(6) by on-the-sieve material after Regrinding, the part of fineness-0.074mm accounts for 85 ~ 90% of whole material gross weights, then adding water and making weight concentration is 20 ~ 30% raw ore slurry;
(7) material of the upper milled of sieve is placed in to floatation equipment, low whipping speed is under 1500 ~ 1800rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 1200-1600g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 5000 ~ 6000g/t, adding direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 1400 ~ 1700g/t, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains oversize direct flotation and roughly selects concentrate and tailings;
(8) oversize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1500 ~ 1800rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 5000-7000g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 300 ~ 500g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains oversize concentrate through reverse flotation and mine tailing;
(9) be under 1500 ~ 1800rpm condition by oversize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 500 ~ 1000g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains oversize reverse flotation concentrate selection and mine tailing again.
The dusting cover of the low grade silico-calcium matter collophane of the present invention stage flotation method of regrinding, its further preferred technical scheme steps is as follows:
(1) the levigate part to fineness-0.074mm of low grade silico-calcium matter collophane is accounted for to 70% of whole material gross weights, then adding water and making weight concentration is 40% raw ore slurry;
(2) raw ore slurry of ore grinding is sieved with dusting cover, screening operation concentration is 40%, the granularity of classification 0.074mm, 0.063mm, 0.045mm respectively, and the lower weight concentration of sieve is adjusted to 25%, and on sieve, weight concentration is 55%;
(3) material under sieve is placed in to floatation equipment, low whipping speed is under 1650rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 2000g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 7000g/t, add again direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 2100g/t raw ore, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains undersize direct flotation and roughly selects concentrate and tailings;
(4) undersize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1650rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 7000g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 400g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains undersize concentrate through reverse flotation and mine tailing;
(5) be under 1650rpm condition by undersize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 750g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains undersize reverse flotation concentrate selection and mine tailing again;
(6) by on-the-sieve material after Regrinding, the part of fineness-0.074mm accounts for 88% of whole material gross weights, then adding water and making weight concentration is 25% raw ore slurry;
(7) material of the upper milled of sieve is placed in to floatation equipment, low whipping speed is under 1650rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 1400g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 5500g/t, adding direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 1550g/t, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains oversize direct flotation and roughly selects concentrate and tailings;
(8) oversize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1650rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 6000g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 400g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains oversize concentrate through reverse flotation and mine tailing;
(9) be under 1650rpm condition by oversize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 750g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains oversize reverse flotation concentrate selection and mine tailing again.
The dusting cover of low grade silico-calcium matter collophane of the present invention is regrinded in stage flotation method: can by the undersize of acquisition again concentrate selection be back to undersize reverse flotation and roughly select in operation, carry out reverse flotation and roughly select together with raw ore slurry; By the oversize of acquisition again concentrate selection be back to oversize reverse flotation and roughly select in operation, carry out reverse flotation and roughly select together with raw ore slurry.
The dusting cover of low grade silico-calcium matter collophane of the present invention is regrinded in stage flotation method: can also by the undersize of acquisition again concentrate selection be back to undersize reverse flotation and roughly select in operation, carry out reverse flotation and roughly select together with raw ore slurry; By the undersize reverse flotation of acquisition roughly select concentrate and oversize again concentrate selection merge and be back to oversize reverse flotation and roughly select operation, carry out reverse flotation and roughly select together with raw ore slurry.
The dusting cover of low grade silico-calcium matter collophane of the present invention is regrinded in stage flotation method: described direct flotation collecting agent can, for disclosed any collecting agent for low grade silico-calcium matter collophane direct flotation in existing, be preferably anion collecting agent C10-C22Alkyl fatty acid or aliphatic acid sylvite or fatty acid sodium salt.
The dusting cover of low grade silico-calcium matter collophane of the present invention is regrinded in stage flotation method: described collecting agent in reverse floatation can, for disclosed any collecting agent for low grade silico-calcium matter collophane reverse flotation in existing, be preferably anion collecting agent C12-C20Higher fatty acids or fatty acid sodium salt.
The dusting cover of low grade silico-calcium matter collophane of the present invention is regrinded in stage flotation method: described nitration mixture can be disclosed any nitration mixture for low grade silico-calcium matter Collophanite flotation in existing, and preferably nitration mixture is the concentrated sulfuric acid and phosphate mixture; In the concentrated sulfuric acid and phosphate mixture, wherein a kind of mass percent of composition is generally not less than 5%, more preferably the concentrated sulfuric acid: phosphoric acid quality is than being 1:1.
The dusting cover of the low grade silico-calcium matter collophane of the present invention stage flotation method of regrinding is applicable to the low grade silico-calcium matter collophane of routine to process, be specially adapted to the processing of the low grade silico-calcium matter collophane with following composition, it is by weight percentage: P2O515.10~24.90%，MgO0.93~5.40%，CaO27.50~38.17%，SiO229.11~38.20%，Fe2O31.90~2.99%；Al2O31.04 ~ 1.99%, surplus is impurity. After the method for the invention is processed, the composition of the final concentrate of acquisition is P by weight percentage2O528.98~34.91%，MgO0.21~1.20%，CaO40.34~43.30%，SiO217.22~19.22%，Fe2O30.92~0.95%；Al2O30.33 ~ 0.41%, surplus is impurity, and the rate of recovery of concentrate reaches 75.01 ~ 89.98%.
Compared with prior art, the present invention is incorporated into dusting cover regrinding process in phosphate rock floating, adopt dusting cover as classification and sorting equipment, realize on the one hand thickness grading, well reduce the secondary slime amount because of the overground generation of mineral, and avoid influencing each other between thickness mineral, improve flotation effect; Dusting cover oversize P on the other hand2O5Grade has improved nearly 3 grades compared with raw ore, well implementation phase ore grinding stage grading. This floatation process is compared with traditional two sections of positive reverse floatation process of Continuous Grinding, concentrate grade and the rate of recovery are all improved, and floating agent dosage can reduce by 20% left and right, and ore grinding cost also reduces greatly, flotation froth viscosity obviously reduces, and smart mine tailing sinking speed is very fast; For with the very unmanageable low grade silico-calcium matter collophane of conventional method, adopt method of the present invention can play good flotation effect. In method for floating of the present invention, the concentration of dusting cover oversize is 55.00% left and right, can directly feed the ball mill of regrinding, and is easy to realize the suitability for industrialized production of low grade silico-calcium matter collophane.
Brief description of the drawings
Fig. 1 is the process chart of the inventive method.
Detailed description of the invention
Referring to accompanying drawing, further describe concrete technical scheme of the present invention, so that those skilled in the art understands the present invention further, and do not form the restriction to its right.
Embodiment 1, a kind of dusting cover of low grade silico-calcium matter collophane stage flotation method of regrinding, its step is as follows:
(1) the levigate part to fineness-0.074mm of low grade silico-calcium matter collophane is accounted for to 60% of whole material gross weights, then adding water and making weight concentration is 30% raw ore slurry;
(2) raw ore slurry of ore grinding is sieved with dusting cover, screening operation concentration is 30%, the granularity of classification 0.074mm, 0.063mm, 0.045mm respectively, and the lower weight concentration of sieve is adjusted to 15%, and on sieve, weight concentration is 45%;
(3) material under sieve is placed in to floatation equipment, low whipping speed is under 1200rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 1000g/t, then add waterglass stir, the addition of waterglass is 6000g/t, add direct flotation collecting agent again, and stir, the addition of direct flotation collecting agent is 1800g/t raw ore, then carry out direct flotation and roughly select, obtain undersize direct flotation and roughly select concentrate and tailings;
(4) undersize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1200rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 6000g/t, add again collecting agent in reverse floatation, and stir, the addition of collecting agent in reverse floatation is 300g/t, then carries out reverse flotation and roughly selects, and obtains undersize concentrate through reverse flotation and mine tailing;
(5) be under 1200rpm condition by undersize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 500g/t, then carries out reverse flotation and selects, obtains undersize reverse flotation concentrate selection and mine tailing again;
(6) by on-the-sieve material after Regrinding, the part of fineness-0.074mm accounts for 80% of whole material gross weights, then adding water and making weight concentration is 15% raw ore slurry;
(7) material of the upper milled of sieve is placed in to floatation equipment, low whipping speed is under 1200rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 800g/t, then add waterglass stir, the addition of waterglass is 4000g/t, adding direct flotation collecting agent, and stirring, the addition of direct flotation collecting agent is 1000g/t, then carry out direct flotation and roughly select, obtain oversize direct flotation and roughly select concentrate and tailings;
(8) oversize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1200rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 5000g/t, add again collecting agent in reverse floatation, and stir, the addition of collecting agent in reverse floatation is 300g/t, then carries out reverse flotation and roughly selects, and obtains oversize concentrate through reverse flotation and mine tailing;
(9) be under 1200rpm condition by oversize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 500g/t, then carries out reverse flotation and selects, obtains oversize reverse flotation concentrate selection and mine tailing again.
Embodiment 2, a kind of dusting cover of low grade silico-calcium matter collophane stage flotation method of regrinding, its step is as follows:
(1) the levigate part to fineness-0.074mm of low grade silico-calcium matter collophane is accounted for to 80% of whole material gross weights, then adding water and making weight concentration is 50% raw ore slurry;
(2) raw ore slurry of ore grinding is sieved with dusting cover, screening operation concentration is 50%, the granularity of classification 0.074mm, 0.063mm, 0.045mm respectively, and the lower weight concentration of sieve is adjusted to 35%, and on sieve, weight concentration is 65%;
(3) material under sieve is placed in to floatation equipment, low whipping speed is under 2100rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 3000g/t, then add waterglass stir, the addition of waterglass is 8000g/t, add direct flotation collecting agent again, and stir, the addition of direct flotation collecting agent is 2500g/t raw ore, then carry out direct flotation and roughly select, obtain undersize direct flotation and roughly select concentrate and tailings;
(4) undersize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 2100rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 8000g/t, add again collecting agent in reverse floatation, and stir, the addition of collecting agent in reverse floatation is 500g/t, then carries out reverse flotation and roughly selects, and obtains undersize concentrate through reverse flotation and mine tailing;
(5) be under 2100rpm condition by undersize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 1000g/t, then carries out reverse flotation and selects, obtains undersize reverse flotation concentrate selection and mine tailing again;
(6) by on-the-sieve material after Regrinding, the part of fineness-0.074mm accounts for 95% of whole material gross weights, then adding water and making weight concentration is 35% raw ore slurry;
(7) material of the upper milled of sieve is placed in to floatation equipment, low whipping speed is under 2100rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 2000g/t, then add waterglass stir, the addition of waterglass is 7000g/t, adding direct flotation collecting agent, and stirring, the addition of direct flotation collecting agent is 2000g/t, then carry out direct flotation and roughly select, obtain oversize direct flotation and roughly select concentrate and tailings;
(8) oversize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 2100rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 7000g/t, add again collecting agent in reverse floatation, and stir, the addition of collecting agent in reverse floatation is 500g/t, then carries out reverse flotation and roughly selects, and obtains oversize concentrate through reverse flotation and mine tailing;
(9) be under 2100rpm condition by oversize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 1000g/t, then carries out reverse flotation and selects, obtains oversize reverse flotation concentrate selection and mine tailing again.
Embodiment 3, the dusting cover of the described low grade silico-calcium matter collophane stage flotation method of regrinding, its step is as follows:
(1) the levigate part to fineness-0.074mm of low grade silico-calcium matter collophane is accounted for to 65% of whole material gross weights, then adding water and making weight concentration is 35% raw ore slurry;
(2) raw ore slurry of ore grinding is sieved with dusting cover, screening operation concentration is 35%, the granularity of classification 0.074mm, 0.063mm, 0.045mm respectively, and the lower weight concentration of sieve is adjusted to 20%, and on sieve, weight concentration is 50%;
(3) material under sieve is placed in to floatation equipment, low whipping speed is under 1500rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 1500g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 6500g/t, add again direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 2000g/t raw ore, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains undersize direct flotation and roughly selects concentrate and tailings;
(4) undersize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1500rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 6500g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 350g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains undersize concentrate through reverse flotation and mine tailing;
(5) be under 1500rpm condition by undersize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 700g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains undersize reverse flotation concentrate selection and mine tailing again;
(6) by on-the-sieve material after Regrinding, the part of fineness-0.074mm accounts for 85% of whole material gross weights, then adding water and making weight concentration is 20% raw ore slurry;
(7) material of the upper milled of sieve is placed in to floatation equipment, low whipping speed is under 1500rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 1200g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 5000g/t, adding direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 1400g/t, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains oversize direct flotation and roughly selects concentrate and tailings;
(8) oversize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1500rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 5000g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 300g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains oversize concentrate through reverse flotation and mine tailing;
(9) be under 1500rpm condition by oversize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 500g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains oversize reverse flotation concentrate selection and mine tailing again.
Embodiment 4, the dusting cover of the described low grade silico-calcium matter collophane stage flotation method of regrinding, its step is as follows:
(1) the levigate part to fineness-0.074mm of low grade silico-calcium matter collophane is accounted for to 75% of whole material gross weights, then adding water and making weight concentration is 45% raw ore slurry;
(2) raw ore slurry of ore grinding is sieved with dusting cover, screening operation concentration is 45%, the granularity of classification 0.074mm, 0.063mm, 0.045mm respectively, and the lower weight concentration of sieve is adjusted to 30%, and on sieve, weight concentration is 60%;
(3) material under sieve is placed in to floatation equipment, low whipping speed is under 1800rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 2500g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 7500g/t, add again direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 2200g/t raw ore, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains undersize direct flotation and roughly selects concentrate and tailings;
(4) undersize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1800rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 7500g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 450g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains undersize concentrate through reverse flotation and mine tailing;
(5) be under 1800rpm condition by undersize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 800g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains undersize reverse flotation concentrate selection and mine tailing again;
(6) by on-the-sieve material after Regrinding, the part of fineness-0.074mm accounts for 90% of whole material gross weights, then adding water and making weight concentration is 30% raw ore slurry;
(7) material of the upper milled of sieve is placed in to floatation equipment, low whipping speed is under 1800rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 1600g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 6000g/t, adding direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 1700g/t, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains oversize direct flotation and roughly selects concentrate and tailings;
(8) oversize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1800rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 7000g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 500g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains oversize concentrate through reverse flotation and mine tailing;
(9) be under 1800rpm condition by oversize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 1000g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains oversize reverse flotation concentrate selection and mine tailing again.
Embodiment 5, a kind of dusting cover of low grade silico-calcium matter collophane stage flotation method of regrinding, its step is as follows:
(1) the levigate part to fineness-0.074mm of low grade silico-calcium matter collophane is accounted for to 70% of whole material gross weights, then adding water and making weight concentration is 40% raw ore slurry;
(2) raw ore slurry of ore grinding is sieved with dusting cover, screening operation concentration is 40%, the granularity of classification 0.074mm, 0.063mm, 0.045mm respectively, and the lower weight concentration of sieve is adjusted to 25%, and on sieve, weight concentration is 55%;
(3) material under sieve is placed in to floatation equipment, low whipping speed is under 1650rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 2000g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 7000g/t, add again direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 2100g/t raw ore, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains undersize direct flotation and roughly selects concentrate and tailings;
(4) undersize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1650rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 7000g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 400g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains undersize concentrate through reverse flotation and mine tailing;
(5) be under 1650rpm condition by undersize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 750g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains undersize reverse flotation concentrate selection and mine tailing again;
(6) by on-the-sieve material after Regrinding, the part of fineness-0.074mm accounts for 88% of whole material gross weights, then adding water and making weight concentration is 25% raw ore slurry;
(7) material of the upper milled of sieve is placed in to floatation equipment, low whipping speed is under 1650rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 1400g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 5500g/t, adding direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 1550g/t, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains oversize direct flotation and roughly selects concentrate and tailings;
(8) oversize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1650rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 6000g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 400g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains oversize concentrate through reverse flotation and mine tailing;
(9) be under 1650rpm condition by oversize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 750g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains oversize reverse flotation concentrate selection and mine tailing again.
Embodiment 6, the dusting cover of the low grade silico-calcium matter collophane of embodiment 1-5 described in any one is regrinded in stage flotation method: by the undersize of acquisition again concentrate selection be back to undersize reverse flotation and roughly select in operation, carry out reverse flotation and roughly select together with raw ore slurry; By the oversize of acquisition again concentrate selection be back to oversize reverse flotation and roughly select in operation, carry out reverse flotation and roughly select together with raw ore slurry.
Embodiment 7, the dusting cover of the low grade silico-calcium matter collophane of embodiment 1-5 described in any one is regrinded in stage flotation method: by the undersize of acquisition again concentrate selection be back to undersize reverse flotation and roughly select in operation, carry out reverse flotation and roughly select together with raw ore slurry; By the undersize reverse flotation of acquisition roughly select concentrate and oversize again concentrate selection merge and be back to oversize reverse flotation and roughly select operation, carry out reverse flotation and roughly select together with raw ore slurry.
Embodiment 8, the dusting cover of the low grade silico-calcium matter collophane of embodiment 1-7 described in any one is regrinded in stage flotation method: described direct flotation collecting agent is anion collecting agent C10-C22Alkyl fatty acid or aliphatic acid sylvite or fatty acid sodium salt.
Embodiment 9, the dusting cover of the low grade silico-calcium matter collophane of embodiment 1-8 described in any one is regrinded in stage flotation method: described collecting agent in reverse floatation is anion collecting agent C12-C20Higher fatty acids or fatty acid sodium salt.
Embodiment 10, the dusting cover of the low grade silico-calcium matter collophane of embodiment 1-9 described in any one is regrinded in stage flotation method: described nitration mixture is the concentrated sulfuric acid and phosphate mixture.
Embodiment 11, the dusting cover of the low grade silico-calcium matter collophane described in embodiment 10 is regrinded in stage flotation method: the concentrated sulfuric acid in nitration mixture: phosphoric acid quality is than being 1:1.
Embodiment 12, the dusting cover of the low grade silico-calcium matter collophane of embodiment 1-11 described in any one is regrinded in stage flotation method: the composition of described low grade silico-calcium matter collophane is by weight percentage: P2O515.10~24.90%，MgO0.93~5.40%，CaO27.50~38.17%，SiO229.11~38.20%，Fe2O31.90~2.99%；Al2O31.04 ~ 1.99%, surplus is impurity.
The floatation equipment adopting in the embodiment of the present invention is the miniature closed circuit continuous flotator of XFLB type.
The ore phosphorus ore containing of selecting in the embodiment of the present invention is mainly collophane and trace amounts of phosphorus lime stone, gangue mineral is mainly clay mineral, quartz and carbonate mineral, other also has a small amount of muscovite, pyrite and goethite, collophane particle with even or misproportion dissemination in matrix (cement) calcite, and subparticle is cementing, parcel embedding cloth mutually, valuable mineral needs fine grinding ability monomer dissociation, and this ore belongs to refractory ore.
In the embodiment of the present invention, be four ore mills of XMG-63 type three roller by the equipment of the levigate employing of low grade silico-calcium matter collophane.
Embodiment 13, the dusting cover of the low grade silico-calcium matter collophane stage flotation methods experiment of regrinding:
The composition of the low grade silico-calcium matter collophane of selecting is P by weight percentage2O521.42%，MgO0.93%，CaO35.17%，SiO229.11%，Fe2O31.90%；Al2O31.04%, surplus is impurity.
Select four ore mills of XMG-63 type three roller that the levigate low grade silico-calcium matter collophane part that is less than 0.074mm to fineness is accounted for to 65.00% of whole material gross weights, then add water and make the raw ore slurry of weight concentration 40.00%;
The raw ore slurry of milled is sieved with dusting cover, and screening operation concentration is 40.00%, the granularity of classification 0.045mm, and the lower concentration of sieve is adjusted to 20.00%, and on sieve, concentration is 60.00%;
Material under sieve is placed in to floatation equipment, and low whipping speed is under 1600rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 2500g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 7500g/t, add again direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 2000g/t, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains undersize direct flotation and roughly selects concentrate and tailings;
Undersize is roughly selected to concentrate and carry out reverse floatation process, low whipping speed is under 1800rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 7500g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 450g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains undersize concentrate through reverse flotation and mine tailing;
Be under 1800rpm condition by undersize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 1000g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains undersize reverse flotation concentrate selection and mine tailing again;
By on-the-sieve material, after Regrinding, the part of fineness-0.074mm accounts for 90.00% of whole material gross weights, and then adding water and making weight concentration is 20.00% raw ore slurry;
The material of the upper milled of sieve is placed in to floatation equipment, and low whipping speed is under 1600rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 1000g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 6000g/t, add again direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 1500g/t raw ore, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains oversize direct flotation and roughly selects concentrate and tailings;
Oversize is roughly selected to concentrate and carry out reverse floatation process, low whipping speed is under 1800rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 6000g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 350g/t raw ore, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains oversize concentrate through reverse flotation and mine tailing;
Be under 1800rpm condition by oversize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 500g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains oversize reverse flotation concentrate selection and mine tailing again;
The undersize obtaining in said method again concentrate selection is back to undersize reverse flotation and roughly selects in operation, carries out reverse flotation and roughly select together with raw ore slurry;
The oversize obtaining in said method again concentrate selection is back to oversize reverse flotation and roughly selects in operation, carries out reverse flotation and roughly select together with raw ore slurry;
The composition of the final concentrate of the acquisition of said method is P by weight percentage2O528.98%，MgO0.30%，CaO41.50%，SiO219.22%，Fe2O30.95%；Al2O30.41%, surplus is impurity, and the rate of recovery of concentrate is 84.56%.
Embodiment 14, the dusting cover of the low grade silico-calcium matter collophane stage flotation methods experiment of regrinding:
The composition of the low grade silico-calcium matter collophane of selecting is P by weight percentage2O521.32%，MgO0.88%，CaO35.17%，SiO229.11%，Fe2O31.90%；Al2O31.04%, surplus is impurity.
Select four ore mills of XMG-63 type three roller that the levigate low grade silico-calcium matter collophane part that is less than 0.074mm to fineness is accounted for to 75.00% of whole material gross weights, then add water and make the raw ore slurry of weight concentration 40.00%;
The raw ore slurry of milled is sieved with dusting cover, and screening operation concentration is 40.00%, the granularity of classification 0.045mm, and the lower concentration of sieve is adjusted to 20.00%, and on sieve, concentration is 55.00%;
Material under sieve is placed in to floatation equipment, and low whipping speed is under 1600rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 3000g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 8000g/t, add again direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 2200g/t, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains undersize direct flotation and roughly selects concentrate and tailings;
Undersize is roughly selected to concentrate and carry out reverse floatation process, low whipping speed is under 1800rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 8000g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 500g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains undersize concentrate through reverse flotation and mine tailing;
Be under 1800rpm condition by undersize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 1000g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains undersize reverse flotation concentrate selection and mine tailing again;
By on-the-sieve material, after Regrinding, the part of fineness-0.074mm accounts for 95.00% of whole material gross weights, and then adding water and making weight concentration is 20% raw ore slurry;
The material of the upper milled of sieve is placed in to floatation equipment, and low whipping speed is under 1600rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 1500g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 7000g/t, add again direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 1800g/t, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains oversize direct flotation and roughly selects concentrate and tailings;
Oversize is roughly selected to concentrate and carry out reverse floatation process, low whipping speed is under 1800rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 7000g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 400g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains oversize concentrate through reverse flotation and mine tailing;
Be under 1800rpm condition by oversize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 500g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains oversize reverse flotation concentrate selection and mine tailing again;
The undersize obtaining in said method again concentrate selection is back to undersize reverse flotation and roughly selects in operation, carries out reverse flotation and roughly select together with raw ore slurry;
The oversize obtaining in said method again concentrate selection is back to oversize reverse flotation and roughly selects in operation, carries out reverse flotation and roughly select together with raw ore slurry;
The composition of the final concentrate of the acquisition of said method is P by weight percentage2O529.55%，MgO0.25%，CaO42.25%，SiO218.88%，Fe2O30.85%；Al2O30.34%, surplus is impurity, and the rate of recovery of concentrate is 83.96%.
Embodiment 15, the dusting cover of the low grade silico-calcium matter collophane stage flotation methods experiment of regrinding:
The composition of the low grade silico-calcium matter collophane of selecting is P by weight percentage2O521.62%，MgO0.92%，CaO35.17%，SiO229.11%，Fe2O31.90%；Al2O31.04%, surplus is impurity.
Select four ore mills of XMG-63 type three roller that the levigate low grade silico-calcium matter collophane part that is less than 0.074mm to fineness is accounted for to 70.00% of whole material gross weights, then add water and make the raw ore slurry of weight concentration 40.00%;
The raw ore slurry of milled is sieved with dusting cover, and screening operation concentration is 40.00%, the granularity of classification 0.045mm, and the lower concentration of sieve is adjusted to 20.00%, and on sieve, concentration is 60.00%;
Material under sieve is placed in to floatation equipment, and low whipping speed is under 1600rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 2500g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 7000g/t, add again direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 2000g/t, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains undersize direct flotation and roughly selects concentrate and tailings;
Undersize is roughly selected to concentrate and carry out reverse floatation process, low whipping speed is under 1800rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 7500g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 450g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains undersize concentrate through reverse flotation and mine tailing;
Be under 1800rpm condition by undersize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 1000g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains undersize reverse flotation concentrate selection and mine tailing again;
By on-the-sieve material, after Regrinding, the part of fineness-0.074mm accounts for 90.00% of whole material gross weights, and then adding water and making weight concentration is 20.00% raw ore slurry;
The material of the upper milled of sieve is placed in to floatation equipment, and low whipping speed is under 1600rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 1000g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 6000g/t, add again direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 1500g/t raw ore, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains oversize direct flotation and roughly selects concentrate and tailings;
Oversize is roughly selected to concentrate and carry out reverse floatation process, low whipping speed is under 1800rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 6000g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 350g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains oversize concentrate through reverse flotation and mine tailing;
Be under 1800rpm condition by oversize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 500g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains oversize reverse flotation concentrate selection and mine tailing again;
The undersize obtaining in said method again concentrate selection is back to undersize reverse flotation and roughly selects in operation, carries out reverse flotation and roughly select together with raw ore slurry;
The undersize reverse flotation obtaining in said method is roughly selected concentrate and oversize and is back to oversize reverse flotation together with concentrate selection again and roughly selects operation, carries out reverse flotation and roughly select together with raw ore slurry;
The composition of the final concentrate of the acquisition of said method is P by weight percentage2O530.85%，MgO0.18%，CaO43.01%，SiO217.68%，Fe2O30.92%；Al2O30.33%, surplus is impurity, and the rate of recovery of concentrate is 80.95%.
Embodiment 16, the dusting cover of the low grade silico-calcium matter collophane stage flotation methods experiment of regrinding:
The composition of the low grade silico-calcium matter collophane of selecting is P by weight percentage2O521.22%，MgO0.96%，CaO34.67%，SiO229.99%，Fe2O31.90%；Al2O31.04%, surplus is impurity.
Select four ore mills of XMG-63 type three roller that the levigate low grade silico-calcium matter collophane part that is less than 0.074mm to fineness is accounted for to 80.00% of whole material gross weights, then add water and make the raw ore slurry of weight concentration 40.00%;
The raw ore slurry of milled is sieved with dusting cover, and screening operation concentration is 40.00%, the granularity of classification 0.045mm, and the lower concentration of sieve is adjusted to 20.00%, and on sieve, concentration is 55.00%;
Material under sieve is placed in to floatation equipment, and low whipping speed is under 1600rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 3000g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 8000g/t, add again direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 2400g/t raw ore, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains undersize direct flotation and roughly selects concentrate and tailings;
Undersize is roughly selected to concentrate and carry out reverse floatation process, low whipping speed is under 1800rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 8000g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 500g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains undersize concentrate through reverse flotation and mine tailing;
Be under 1800rpm condition by undersize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 1000g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains undersize reverse flotation concentrate selection and mine tailing again;
By on-the-sieve material, after Regrinding, the part of fineness-0.074mm accounts for 95.00% of whole material gross weights, and then adding water and making weight concentration is 20.00% raw ore slurry;
The material of the upper milled of sieve is placed in to floatation equipment, and low whipping speed is under 1600rpm condition, first to add Na2CO3Regulate pH, Na2CO3Addition be 1500g/t, add again waterglass to stir 2 ~ 4min, the addition of waterglass is 7000g/t, add again direct flotation collecting agent, and stir 2 ~ 4min, the addition of direct flotation collecting agent is 1800g/t raw ore, then carries out 4 ~ 8min direct flotation and roughly selects, and obtains oversize direct flotation and roughly selects concentrate and tailings;
Oversize is roughly selected to concentrate and carry out reverse floatation process, low whipping speed is under 1800rpm condition, first to add mixed acid for adjusting pH, the addition of nitration mixture is 6500g/t, add again collecting agent in reverse floatation, and stir 1 ~ 2min, the addition of collecting agent in reverse floatation is 400g/t, then carries out 4 ~ 8min reverse flotation and roughly selects, and obtains oversize concentrate through reverse flotation and mine tailing;
Be under 1800rpm condition by oversize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, the addition of nitration mixture is 500g/t, then carries out 4 ~ 8min reverse flotation and selects, obtains oversize reverse flotation concentrate selection and mine tailing again;
The undersize obtaining in said method again concentrate selection is back to undersize reverse flotation and roughly selects in operation, carries out reverse flotation and roughly select together with raw ore slurry;
The undersize reverse flotation obtaining in said method roughly select concentrate and oversize again concentrate selection merge and be back to oversize reverse flotation and roughly select operation, carry out reverse flotation and roughly select together with raw ore slurry;
The composition of the final concentrate of the acquisition of said method is P by weight percentage2O531.05%，MgO0.15%，CaO43.25%，SiO217.28%，Fe2O30.92%；Al2O30.33%, surplus is impurity, and the rate of recovery of concentrate is 80.21%.

Claims (10)

1. the dusting cover of the low grade silico-calcium matter collophane stage flotation method of regrinding, is characterized in that, its step is as follows:
(1) the levigate part to fineness-0.074mm of low grade silico-calcium matter collophane is accounted for to 60～80% of whole material gross weights, soAfter add water that to make weight concentration be 30～50% raw ore slurry;
(2) raw ore slurry of ore grinding is sieved with dusting cover, screening operation concentration is 30-50%, difference classification 0.074mm,The granularity of 0.063mm, 0.045mm, the lower weight concentration of sieve is adjusted to 15～35%, and on sieve, weight concentration is 45～65%;
(3) material under sieve is placed in to floatation equipment, low whipping speed is under 1200～2100rpm condition, first to add Na2CO3AdjustJoint pH, Na2CO3Addition be 1000-3000g/t, then add waterglass stir, the addition of waterglass is6000～8000g/t, then add direct flotation collecting agent, and stir, the addition of direct flotation collecting agent is that 1800～2500g/t is formerOre deposit, then carries out direct flotation and roughly selects, and obtains undersize direct flotation and roughly selects concentrate and tailings;
(4) undersize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1200～2100rpm condition, first to add nitration mixtureRegulate pH, the addition of nitration mixture is 6000-8000g/t, then adds collecting agent in reverse floatation, and stirs the adding of collecting agent in reverse floatationEntering amount is 300～500g/t, then carries out reverse flotation and roughly selects, and obtains undersize concentrate through reverse flotation and mine tailing;
(5) be under 1200～2100rpm condition by undersize reverse flotation rougher tailings low whipping speed, first add nitration mixture to regulatePH, the addition of nitration mixture is 500-1000g/t, then carries out reverse flotation and selects, obtain undersize reverse flotation again concentrate selection andMine tailing;
(6) by on-the-sieve material after Regrinding, the part of fineness-0.074mm accounts for 80～95% of whole material gross weights, thenAdding water and making weight concentration is 15～35% raw ore slurry;
(7) material of the upper milled of sieve is placed in to floatation equipment, low whipping speed is first to add under 1200～2100rpm conditionNa2CO3Regulate pH, Na2CO3Addition be 800-2000g/t, then add waterglass stir, the addition of waterglass is4000～7000g/t, then add direct flotation collecting agent, and stir, the addition of direct flotation collecting agent is 1000～2000g/t, soAfter carry out direct flotation and roughly select, obtain oversize direct flotation and roughly select concentrate and tailings;
(8) oversize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1200～2100rpm condition, first to add nitration mixtureRegulate pH, the addition of nitration mixture is 5000-7000g/t, then adds collecting agent in reverse floatation, and stirs the adding of collecting agent in reverse floatationEntering amount is 300～500g/t, then carries out reverse flotation and roughly selects, and obtains oversize concentrate through reverse flotation and mine tailing;
(9) be under 1200～2100rpm condition by oversize reverse flotation rougher tailings low whipping speed, first add nitration mixture to regulatePH, the addition of nitration mixture is 500～1000g/t, then carries out reverse flotation and selects, obtain oversize reverse flotation again concentrate selection andMine tailing.
2. the dusting cover of the low grade silico-calcium matter collophane according to claim 1 stage flotation method of regrinding, is characterized in that, itsStep is as follows:
(1) the levigate part to fineness-0.074mm of low grade silico-calcium matter collophane is accounted for to 65～75% of whole material gross weights, soAfter add water that to make weight concentration be 35～45% raw ore slurry;
(2) raw ore slurry of ore grinding is sieved with dusting cover, screening operation concentration is 35～45%, difference classification 0.074mm,The granularity of 0.063mm, 0.045mm, the lower weight concentration of sieve is adjusted to 20～30%, and on sieve, weight concentration is 50～60%;
(3) material under sieve is placed in to floatation equipment, low whipping speed is under 1500～1800rpm condition, first to add Na2CO3AdjustJoint pH, Na2CO3Addition be 1500-2500g/t, then add waterglass stir 2～4min, the addition of waterglass is6500～7500g/t, then add direct flotation collecting agent, and stir 2～4min, the addition of direct flotation collecting agent is2000～2200g/t raw ore, then carries out 4～8min direct flotation and roughly selects, and obtains undersize direct flotation and roughly selects concentrate and tailings;
(4) undersize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1500～1800rpm condition, first to add nitration mixtureRegulate pH, the addition of nitration mixture is 6500～7500g/t, then adds collecting agent in reverse floatation, and stirs 1～2min, and reverse flotation is caughtThe addition of receiving agent is 350～450g/t, then carries out 4～8min reverse flotation and roughly selects, and obtains undersize concentrate through reverse flotation and tailOre deposit;
(5) be under 1500～1800rpm condition by undersize reverse flotation rougher tailings low whipping speed, first add nitration mixture to regulatePH, the addition of nitration mixture is 700-800g/t, then carries out 4～8min reverse flotation and selects, obtains undersize reverse flotation and selectsConcentrate and tailings;
(6) by on-the-sieve material after Regrinding, the part of fineness-0.074mm accounts for 85～90% of whole material gross weights, thenAdding water and making weight concentration is 20～30% raw ore slurry;
(7) material of the upper milled of sieve is placed in to floatation equipment, low whipping speed is first to add under 1500～1800rpm conditionNa2CO3Regulate pH, Na2CO3Addition be 1200-1600g/t, then add waterglass stir 2～4min, waterglassAddition is 5000～6000g/t, then adds direct flotation collecting agent, and stirs 2～4min, and the addition of direct flotation collecting agent is1400～1700g/t, then carries out 4～8min direct flotation and roughly selects, and obtains oversize direct flotation and roughly selects concentrate and tailings;
(8) oversize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1500～1800rpm condition, first to add nitration mixtureRegulate pH, the addition of nitration mixture is 5000-7000g/t, then adds collecting agent in reverse floatation, and stirs 1～2min, and reverse flotation is caughtThe addition of receiving agent is 300～500g/t, then carries out 4～8min reverse flotation and roughly selects, and obtains oversize concentrate through reverse flotation and tailOre deposit;
(9) be under 1500～1800rpm condition by oversize reverse flotation rougher tailings low whipping speed, first add nitration mixture to regulatePH, the addition of nitration mixture is 500～1000g/t, then carries out 4～8min reverse flotation and selects, obtains oversize reverse flotation againConcentrate selection and mine tailing.
3. the dusting cover of the low grade silico-calcium matter collophane according to claim 2 stage flotation method of regrinding, is characterized in that, itsStep is as follows:
(1) the levigate part to fineness-0.074mm of low grade silico-calcium matter collophane is accounted for to 70% of whole material gross weights, then addIt is 40% raw ore slurry that water is made weight concentration;
(2) raw ore slurry of ore grinding is sieved with dusting cover, screening operation concentration is 40%, difference classification 0.074mm, 0.063mm,The granularity of 0.045mm, the lower weight concentration of sieve is adjusted to 25%, and on sieve, weight concentration is 55%;
(3) material under sieve is placed in to floatation equipment, low whipping speed is under 1650rpm condition, first to add Na2CO3RegulatepH，Na2CO3Addition be 2000g/t, then add waterglass stir 2～4min, the addition of waterglass is 7000g/t,Add direct flotation collecting agent again, and stir 2～4min, the addition of direct flotation collecting agent is 2100g/t raw ore, then carries out4～8min direct flotation is roughly selected, and obtains undersize direct flotation and roughly selects concentrate and tailings;
(4) undersize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1650rpm condition, first to add nitration mixture to regulatePH, the addition of nitration mixture is 7000g/t, then adds collecting agent in reverse floatation, and stirs 1～2min, the adding of collecting agent in reverse floatationAmount, for 400g/t, then carries out 4～8min reverse flotation to roughly select, and obtains undersize concentrate through reverse flotation and mine tailing;
(5) be under 1650rpm condition by undersize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, nitration mixtureAddition be 750g/t, then carry out 4～8min reverse flotation and select again, obtain undersize reverse flotation concentrate selection and mine tailing again;
(6) by on-the-sieve material after Regrinding, the part of fineness-0.074mm accounts for 88% of whole material gross weights, then adds waterMake weight concentration and be 25% raw ore slurry;
(7) material of the upper milled of sieve is placed in to floatation equipment, low whipping speed is under 1650rpm condition, first to add Na2CO3AdjustJoint pH, Na2CO3Addition be 1400g/t, then add waterglass stir 2～4min, the addition of waterglass is
5500g/t, then add direct flotation collecting agent, and stir 2～4min, the addition of direct flotation collecting agent is 1550g/t, then entersRow 4～8min direct flotation is roughly selected, and obtains oversize direct flotation and roughly selects concentrate and tailings;
(8) oversize is roughly selected to concentrate and carried out reverse floatation process, low whipping speed is under 1650rpm condition, first to add nitration mixture to regulatePH, the addition of nitration mixture is 6000g/t, then adds collecting agent in reverse floatation, and stirs 1～2min, the adding of collecting agent in reverse floatationAmount, for 400g/t, then carries out 4～8min reverse flotation to roughly select, and obtains oversize concentrate through reverse flotation and mine tailing;
(9) be under 1650rpm condition by oversize reverse flotation rougher tailings low whipping speed, first add mixed acid for adjusting pH, nitration mixtureAddition be 750g/t, then carry out 4～8min reverse flotation and select again, obtain oversize reverse flotation concentrate selection and mine tailing again.
4. according to the dusting cover of the low grade silico-calcium matter collophane described in claim 1 or the 2 or 3 stage flotation method of regrinding, its featureBe: by the undersize of acquisition again concentrate selection be back to undersize reverse flotation and roughly select in operation, roughly select concentrate with undersizeCarrying out together reverse flotation roughly selects; By the oversize of acquisition again concentrate selection be back to oversize reverse flotation and roughly select in operation, with sieveUpper product coarse concentrate selection carries out together reverse flotation and roughly selects.
5. according to the dusting cover of the low grade silico-calcium matter collophane described in claim 1 or the 2 or 3 stage flotation method of regrinding, its featureBe: by the undersize of acquisition again concentrate selection be back to undersize reverse flotation and roughly select in operation, roughly select concentrate with undersizeCarrying out together reverse flotation roughly selects; By the undersize reverse flotation of acquisition roughly select concentrate and oversize again concentrate selection merge and be back to sieveUpper product reverse flotation is roughly selected operation, carries out reverse flotation together with roughly selecting concentrate to roughly select with oversize.
6. according to the dusting cover of the low grade silico-calcium matter collophane described in claim 1 or the 2 or 3 stage flotation method of regrinding, its featureBe: described direct flotation collecting agent is anion collecting agent C10-C22Alkyl fatty acid or C10-C22Alkyl fatty acid potassium salt orPerson C10-C22Alkyl fatty acid sodium-salt.
7. according to the dusting cover of the low grade silico-calcium matter collophane described in claim 1 or the 2 or 3 stage flotation method of regrinding, its featureBe: described collecting agent in reverse floatation is anion collecting agent C12-C20Higher fatty acids or C12-C20Higher fatty acids sodium salt.
8. according to the dusting cover of the low grade silico-calcium matter collophane described in claim 1 or the 2 or 3 stage flotation method of regrinding, its featureBe: described nitration mixture is the concentrated sulfuric acid and phosphate mixture.
9. the dusting cover of the low grade silico-calcium matter collophane according to claim 8 stage flotation method of regrinding, is characterized in that: mixedThe concentrated sulfuric acid in acid: phosphoric acid quality is than being 1:1.
10. according to the dusting cover of the low grade silico-calcium matter collophane described in claim 1 or the 2 or 3 stage flotation method of regrinding, its featureBe: the composition of described low grade silico-calcium matter collophane is by weight percentage: P2O515.10～24.90％，MgO0.93～5.40％，CaO27.50～38.17％，SiO229.11～38.20％，Fe2O31.90～2.99％；Al2O31.04～1.99%, surplus is impurity.
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CN105750089B (en) * 2016-05-09 2018-01-12 武汉科技大学 A kind of magnesia collophane method for separating
CN106423536B (en) * 2016-12-21 2018-12-11 中蓝连海设计研究院有限公司 A kind of substep ore grinding floatation process anyway handling silicon calcium collophanite
CN107309075A (en) * 2017-08-08 2017-11-03 贵州川恒化工股份有限公司 Collophane beneficiation method
CN109127122B (en) * 2018-11-14 2020-05-29 安徽工业大学 Beneficiation method for improving iron and reducing silicon of magnetite concentrate
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