CN-121988463-A - Application of primary rutile reverse flotation dephosphorization collector

Abstract

The invention discloses a primary rutile reverse flotation dephosphorization collector sodium Methyl Oleate Sulfonate (MOS), belonging to the technical field of mineral flotation. The collector MOS is a difunctional anionic surfactant containing both sulfonic acid groups and ester groups. In the reverse flotation system, MOS can be selectively adsorbed on Ca 2+ active sites on the surface of apatite and does not interact with Ti 4+ sites on the surface of rutile, so that the floatability difference of the apatite and the rutile is remarkably enlarged, and the high-efficiency separation of the apatite and the rutile is realized. The collecting agent has the advantages of simple synthesis process, strong selectivity and the like, can effectively realize the efficient dephosphorization of the primary rutile ore, provides theoretical support and economic value for the clean utilization and sustainable development of titanium resources, and has wide application prospect.

Inventors

• ZHANG LING
• CAO YIJUN
• MA ZHIYU
• FAN GUIXIA
• ZHANG MENGLONG

Assignees

• 郑州大学

Dates

Publication Date

20260508

Application Date

20260402

Claims (9)

1. 1. The application of the primary rutile reverse flotation dephosphorization collector is characterized by comprising the following steps: Step one, preprocessing mineral samples Selecting rutile pure minerals and apatite pure minerals, mixing, crushing to the grain size of less than 0.841mm by a jaw crusher, grinding for 5 minutes by a ball mill, screening for 10 minutes by vibration screening, and screening out the grain size of-0.074 to +0.038mm as a flotation raw material; Step two, size mixing and pH adjustment 2G of pure minerals are weighed during single mineral flotation, an XFD type flotation machine is added, 40mL of ultrapure water is added, the flotation machine is started to stir for 3 minutes, the ore pulp is uniformly dispersed, the pH value of the ore pulp is regulated to about 4.0 by hydrochloric acid, and the ore pulp is regulated for 3 minutes; Step three, adding a collector Adding a sodium oleate sulfonate collector into the ore pulp, wherein the consumption of the single mineral flotation collector is 150mg/L, and continuously stirring for 3 minutes; step four, froth flotation Maintaining the rotation speed of the flotation machine at 1700r/min, maintaining the aeration quantity at 100ml/min, scraping bubbles for 3 minutes, collecting a foam product which is concentrate, and enabling ore pulp at the bottom of the flotation tank to be the inhibited tailings; Step five, treatment of flotation products And drying the flotation froth product to obtain flotation concentrate, and drying the product in the tank to obtain flotation tailings.
2. 2. The use of a primary rutile reverse flotation dephosphorization collector according to claim 1, wherein the content of the rutile pure mineral TiO 2 is more than or equal to 94%, the content of the apatite pure mineral CaO is more than or equal to 58% and the content of the apatite pure mineral P 2 O 5 is more than or equal to 36%, and the rutile pure mineral TiO 2 is taken from African motor Gaussa.
3. 3. The use of a primary rutile reverse flotation dephosphorizing collector according to claim 1, wherein the single mineral flotation results, 2g each of rutile and apatite, are the best at ph=4, and the best separation of the two minerals.
4. 4. The use of a primary rutile reverse flotation dephosphorization collector as claimed in claim 3, wherein the recovery rate of rutile is 7.79% and the recovery rate of apatite is 77.93% when the MOS amount of the collector is 50 mg/L.
5. 5. The use of a primary rutile reverse flotation dephosphorization collector as claimed in claim 4, wherein the recovery rate of rutile is 11.62% and the recovery rate of apatite is 88.18% when the MOS amount of the collector is 100 mg/L.
6. 6. The use of a primary rutile reverse flotation dephosphorization collector as claimed in claim 5, wherein the recovery rate of rutile is 11.31% and the recovery rate of apatite is 91.37% when the MOS amount of the collector is 150 mg/L.
7. 7. The method of claim 6, wherein the recovery rate of rutile is 12.10% and the recovery rate of apatite is 92.09% when the MOS amount of the collector is 200 mg/L.
8. 8. The use of a primary rutile reverse flotation dephosphorization collector as claimed in claim 7, wherein the recovery rate of rutile is 11.99% and the recovery rate of apatite is 91.27% when the MOS amount of the collector is 250 mg/L.
9. 9. The application of the primary rutile reverse flotation dephosphorization collector as claimed in claim 1, wherein the concentration of hydrochloric acid in the second step is 0.1mol/L.

Description

Application of primary rutile reverse flotation dephosphorization collector Technical Field The invention relates to the technical field of mineral flotation, in particular to application of a primary rutile reverse flotation dephosphorization collector. Background Rutile (TiO 2) is used as a core raw material for preparing high-end titanium white powder and metallic titanium, the problems of low grade, fine embedding granularity and complex mineral composition of rutile resources generally exist, apatite is used as a main impurity mineral, the separation difficulty of the two is extremely high, if the phosphorus element enters a subsequent metallurgical process along with the rutile ore, the brittleness transition temperature of the titanium alloy can be remarkably increased, and the toughness matching performance required by an aviation material is weakened, so that the deep removal of the apatite in the rutile ore has become a key technical problem for restricting the economic utilization of the original titanium resources. At present, the reverse flotation method is a mainstream technology for separating rutile from apatite, and is characterized in that the mineral floatability difference is regulated and controlled through a selective collector, so that the apatite is floated on the water surface of ore pulp, and the rutile is left in the ore pulp due to the surface hydrophilicity, thereby realizing the effect of 'titanium retention and phosphorus reduction', and in a rutile and apatite reverse flotation system, the conventional collector of the apatite is used as a reverse flotation agent, so that the conventional collector of the apatite is selectively adsorbed on the surface of the apatite and floats upwards, and the rutile is left in the ore pulp due to the surface hydrophilicity, so that the two are separated, and the conventional collector of the apatite is mainly divided into the following categories: The main problems of fatty acid collectors are that the mutual floating phenomenon is serious, the floating effect is obviously reduced under the low-temperature condition, the amine collectors are represented by dodecylamine (DDA), the core group is amino (-NH 2), the selectivity to symbiotic carbonate gangue is limited, the cost is high, and the environmental friendliness is required to be improved. Sulfonic acid collectors are represented by Sodium Dodecyl Benzene Sulfonate (SDBS) and Sodium Dodecyl Sulfonate (SDS), the core group is a sulfonic acid group (-SO 3 H), and the main problem is that the collecting capacity is insufficient and the maximum recovery rate of apatite is difficult to break through 80%. The ester collectors are represented by methyl oleate, fatty acid Methyl Ester Sulfonate (MES) and the like, the core group is an ester group (-COOR), and the ester collectors are usually used only as auxiliary collectors, and have weak collecting ability when used alone. The sulfonic acid-ester difunctional collector is the technical route closest to the research at present, represents the reagent including fatty acid methyl sodium sulfonate, fatty acid triethanolamine sulfosuccinate and sulfonated fatty acid complex ester sodium salt, realizes selective anchoring by chelating mineral surface Ca 2+ through ester groups (-COOR), and simultaneously utilizes sulfonic acid groups (-SO 3-) to construct a stable hydration layer SO as to improve dispersibility and hard water resistance, and realizes the synergistic effect of selective adsorption-interfacial dispersion-foam stabilization in the same molecule, however, the existing research is mainly focused on ilmenite, collophanite, spodumene, scheelite and other systems, belongs to blank in the field of rutile-apatite reverse flotation dephosphorization, and lacks a high-selectivity molecular design which is specific for Ca site identification and is chemically inert to Ti site. The rutile and the apatite have small chemical property difference of surface active sites, so that the conventional collector is often insufficient in selectivity, high-efficiency separation of the rutile and the apatite is difficult to realize, and the floatability difference is enlarged by means of the high-selectivity collector. At present, the research on the collection of apatite is mainly focused on monofunctional medicaments such as fatty acids, amines, sulfonic acids and the like, but the medicaments generally have the inherent defects of serious mutual flotation phenomenon, poor low-temperature flotation effect, limited selectivity on carbonate gangue, insufficient environmental friendliness and the like. Although sulfonic acid-ester difunctional collectors (such as fatty acid methyl sodium sulfonate) improve selectivity and hard water resistance to a certain extent, the existing research is mainly focused on ilmenite, collophanite, spodumene, scheelite and other systems, and the field of rutile-apatite reverse flotation dephosphorization is still blank. And the