CN109604070B - Agent for high-sulfur magnetite ore beneficiation and application method thereof - Google Patents
Agent for high-sulfur magnetite ore beneficiation and application method thereof Download PDFInfo
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- CN109604070B CN109604070B CN201811478344.8A CN201811478344A CN109604070B CN 109604070 B CN109604070 B CN 109604070B CN 201811478344 A CN201811478344 A CN 201811478344A CN 109604070 B CN109604070 B CN 109604070B
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- liquid medicine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
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- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to the technical field of beneficiation reagents, in particular to a reagent for beneficiation of high-sulfur magnetite ore and an application method thereof, wherein citric acid, tartaric acid, iron sulfide and water are prepared into a mixed solution; the collecting liquid medicine is prepared from ethidium and nitrogen, sodium sulfide, ammonium nitrate and water, the mixed liquid medicine and the collecting liquid medicine are mixed into the high-sulfur magnetite ore beneficiation reagent according to the volume ratio of 1:0.3-1.8, activation of pyrrhotite is achieved, separation between the pyrrhotite and magnetite is guaranteed, the aim of enhancing the desulfurization effect is achieved, the high-sulfur magnetite ore beneficiation reagent desulfurization treatment method can be suitable for desulfurization treatment of high-sulfur magnetite ores with different sulfur contents, the sulfur content in iron ore concentrate subjected to flotation treatment is reduced to be below 0.15%, and the yield of the iron ore concentrate reaches to be above 91%.
Description
Technical Field
The invention relates to the technical field of beneficiation reagents, in particular to a reagent for beneficiation of high-sulfur magnetite ore and an application method thereof.
Background
The iron extraction and sulfur reduction of the high-sulfur magnetite ore are generally carried out by adopting a combined process of ore grinding, magnetic separation and floatation, namely, grinding the raw ore to a proper ore grinding granularity, carrying out low-intensity magnetic separation and tailing discarding to obtain magnetite concentrate with qualified iron grade, and carrying out reverse floatation desulfurization on the magnetite concentrate. The sulfur in the high-sulfur magnetite exists mainly in the form of pyrrhotite, and the problem of desulfurization is one of important factors which restrict the development of iron and steel enterprises for a long time and becomes a common problem facing the whole industry. In order to fully utilize iron ore resources having a high sulfur content, desulfurization treatment is required. But because the specific magnetization coefficient and the specific gravity of pyrrhotite and magnetite are very close, the iron ore concentrate desulfurization is an industrial problem.
At present, the research on the beneficiation process and the medicament is more, but the research degree is still immature, so that the effect of treating the high-sulfur iron ore is not ideal. Many documents currently studied, for example, patent No. 201510913937.2 discloses a desulfurization agent prepared by compounding citric acid, tartaric acid, oxalic acid, copper sulfate and water, and the concentrations of the citric acid aqueous solution, tartaric acid aqueous solution, copper sulfate aqueous solution and oxalic acid aqueous solution are limited to 0.5 to 1.5 mass%, respectively; the desulfurization agent also comprises a collecting agent accounting for 0.01-10 wt% of the total weight, and the structure of the collecting agent is limited, so that pyrrhotite can be effectively activated, the separation of pyrrhotite and magnetite is realized, the desulfurization effect is improved, the sulfur content in the iron ore concentrate can be reduced to be below 0.24%, the sulfur recovery rate in the mixed sulfur ore concentrate is up to above 90%, and the desulfurization effect and the recovery rate of the iron ore concentrate are considered. However, the selection of effective components adopted by the desulfurization reagent for the retaining wall is strict and harsh, and the adopted collecting agent is a specific collecting agent component, so that the cost of the reagent is higher, and the cost in the beneficiation and desulfurization process is higher. Therefore, for expanding the universality of effective components in the desulfurization agent, the research on the improvement and enhancement of the desulfurization effect is developed by utilizing the reasonable collocation of the common agents in the prior art, and the method also becomes one of the hot problems in the current research on the beneficiation and desulfurization. In view of this, on the basis of combining long-term exploration and trial, the researchers provide a novel desulfurizer for mineral separation and desulfurization of high-sulfur iron ores through reasonable selection and preparation of medicament components.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a reagent for high-sulfur magnetite ore dressing and an application method thereof.
The method is realized by the following technical scheme:
the high-sulfur magnetite ore dressing agent is a mixed solution prepared from citric acid, tartaric acid, iron sulfide and water; preparing collecting liquid medicine by adopting ethionamide, sodium sulfide, ammonium nitrate and water; the mixed solution contains 1.7-2.5% by mass of citric acid, 0.8-1.2% by mass of tartaric acid and 0.01-0.07% by mass of iron sulfide; the collecting liquid medicine contains 13-17% of ethidium-sulfur-nitrogen mass concentration, 3-9% of sodium sulfide mass concentration and 17-21% of ammonium nitrate black powder mass concentration; wherein the mixed liquid medicine and the collecting liquid medicine are mixed according to the volume ratio of 1: 0.3-1.8.
The mixed liquid medicine and the collecting liquid medicine are mixed according to the volume ratio of 1: 1.1.
The mixed solution contains 2.2% of citric acid, 0.9% of tartaric acid and 0.06% of ferric sulfide.
The collecting liquid medicine contains 15% of ethidium, 6% of sodium sulfide and 19% of ammonium nitrate.
The preparation process of the high-sulfur magnetite ore mining chemical comprises a mixed solution preparation step, a collecting chemical solution preparation step and a mixed chemical solution and collecting chemical solution mixing step; the preparation method of the mixed solution comprises the steps of uniformly mixing citric acid, tartaric acid and iron sulfide, adding into water, and uniformly stirring to obtain the mixed solution; the collecting liquid medicine is prepared by uniformly mixing ethionine, sodium sulfide and ammonium nitrate, stirring into water, and uniformly stirring; the step of mixing the mixed liquid medicine and the collecting liquid medicine is to mix the mixed liquid medicine and the collecting liquid medicine evenly according to the volume ratio, and then the collecting liquid medicine is obtained.
A method for removing pyrrhotite from high-sulfur iron ore concentrate by flotation comprises the steps of adding the high-sulfur iron ore concentrate chemical in the flotation process, stirring uniformly, adding a foaming agent, and performing flotation.
The high-sulfur magnetite ore beneficiation reagent is prepared by preparing a mixed solution and then independently storing; when the collecting liquid medicine is used, the collecting liquid medicine is prepared on site, and after the collecting liquid medicine is prepared, the collecting liquid medicine is added into the mixed solution and immediately used for removing pyrrhotite in the high-sulfur iron concentrate through flotation.
Compared with the prior art, the invention has the technical effects that:
preparing a mixed solution by using citric acid, tartaric acid, iron sulfide and water; the collecting liquid medicine is prepared from ethidium and nitrogen, sodium sulfide, ammonium nitrate and water, the mixed liquid medicine and the collecting liquid medicine are mixed into the high-sulfur magnetite ore beneficiation reagent according to the volume ratio of 1:0.3-1.8, activation of pyrrhotite is achieved, separation between the pyrrhotite and magnetite is guaranteed, the aim of enhancing the desulfurization effect is achieved, the high-sulfur magnetite ore beneficiation reagent desulfurization treatment method can be suitable for desulfurization treatment of high-sulfur magnetite ores with different sulfur contents, the sulfur content in iron ore concentrate subjected to flotation treatment is reduced to be below 0.15%, and the yield of the iron ore concentrate reaches to be above 91%.
Detailed Description
The technical solution of the present invention is further defined below with reference to the specific embodiments, but the scope of the claims is not limited to the description.
In the following experiments, the adopted high-sulfur magnetite ore beneficiation reagent is independently stored after the mixed solution is prepared; when the collecting liquid medicine is used, the collecting liquid medicine is prepared on site, and after the collecting liquid medicine is prepared, the collecting liquid medicine is added into the mixed solution and immediately used for removing pyrrhotite in the high-sulfur iron concentrate through flotation; the preparation process comprises the steps of preparing a mixed solution, preparing a collecting liquid medicine and mixing the mixed liquid medicine and the collecting liquid medicine; the preparation method of the mixed solution comprises the steps of uniformly mixing citric acid, tartaric acid and iron sulfide, adding into water, and uniformly stirring to obtain the mixed solution; the collecting liquid medicine is prepared by uniformly mixing ethionine, sodium sulfide and ammonium nitrate, stirring into water, and uniformly stirring; the step of mixing the mixed liquid medicine and the collecting liquid medicine is to mix the mixed liquid medicine and the collecting liquid medicine evenly according to the volume ratio, and then the collecting liquid medicine is obtained.
Test 1
High-sulfur magnetite ore from inner Mongolia was taken as a raw material, and the chemical element analysis of the raw ore is shown in Table 1, the iron phase analysis is shown in Table 2, and the sulfur phase analysis is shown in Table 3:
TABLE 1
| TFe | SiO2 | Al2O3 | CaO | MgO | |
| Content (%) | 56.83 | 4.91 | 1.17 | 3.92 | 3.18 |
| TS | SS | P | K2O | Na2O | CuO |
| 3.79 | 3.42 | 0.07 | 0.31 | 0.04 | 0.02 |
TABLE 2
| Iron content of iron phase (%) | Occupancy ratio (%) | Remarks for note | |
| Iron of magnetite | 51.18 | 89.89 | Magnetic iron |
| Iron of pyrrhotite | 2.83 | 4.97 | Magnetic iron |
| Iron of hematite | 1.38 | 2.43 | |
| Iron of siderite | 0.71 | 1.25 | |
| Iron of iron silicate ore | 0.26 | 0.46 | |
| Iron of pyrite | 0.57 | 1.00 | |
| All iron | 56.93 | 100.00 |
TABLE 3
| Content (%) | Occupancy ratio (%) | |
| Elemental sulfur | 0.015 | 0.387 |
| Sulfur of magnetic sulfides | 2.32 | 59.871 |
| Sulfur of sulfate | 1.01 | 26.065 |
| Sulfur of other sulfides | 0.53 | 13.677 |
| All sulfur | 3.875 | 100.000 |
Through the analysis, the adopted high-sulfur magnetite ore has better grade, mainly contains TS impurities, and reaches 3.79 percent, and 59.871 percent of the high-sulfur magnetite ore exists in the form of pyrrhotite, so that the pyrrhotite belongs to a strong magnetic mineral, and the magnetite enters weak magnetic concentrate in the weak magnetic separation process, is difficult to remove by adopting single weak magnetic separation, and needs to be removed by flotation.
To this end, in this test, the researchers used the above-mentioned high-sulfur magnetite ore as a raw material, treated according to the beneficiation method in the prior art, such as the flotation process described in patent No. 201510913937.2, and mixed the mixed solution with the collecting liquid medicine to prepare a desulfurizer (chemical for high-sulfur magnetite ore beneficiation), butyl xanthate was used as the collecting agent and oil No. 2 of foaming agent, and the desulfurizer, butyl xanthate and oil No. 2 of foaming agent were added in this order, the chemical dosage in the concentration and scavenging section was halved once, the specific dosages of the desulfurizer, butyl xanthate and oil No. 2 of foaming agent were treated according to the dosages described in the prior art, and the specific formula of the desulfurizer was formulated according to the following ratio shown in table 4:
TABLE 4
The results of the activated flotation desulfurization test of the high-sulfur magnetite treated in the above changes 1 to 4 were measured and shown in the following table 5:
TABLE 5
It can be clearly seen from the test results in table 5 that the inventive reagent, in combination with the treatment of the roughing, scavenging, concentrating and other processes in the prior art, has a very good removal effect and removal selectivity on the desulfurization effect of pyrrhotite, so that the sulfur content in the iron ore concentrate is reduced to about 0.13%, the desulfurizer for high-sulfur magnetite flotation in the prior art is replaced, the flotation desulfurization cost in the prior art is reduced, and an alternative operation scheme is provided for the preparation of the desulfurizer and the selection of raw materials.
The test results show that the control quantity of the effective components in each medicament can greatly influence the treatment result, so that the reasonable medicament addition quantity and proportion can be beneficial to improving and enhancing the desulfurization effect in the high-sulfur magnetite.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The high-sulfur magnetite ore beneficiation reagent is characterized in that citric acid, tartaric acid, iron sulfide and water are prepared into a mixed solution; preparing collecting liquid medicine by adopting ethionamide, sodium sulfide, ammonium nitrate and water; the mixed solution contains 1.7-2.5% by mass of citric acid, 0.8-1.2% by mass of tartaric acid and 0.01-0.07% by mass of iron sulfide; the collecting liquid medicine contains 13-17% of ethidium-sulfur-nitrogen mass concentration, 3-9% of sodium sulfide mass concentration and 17-21% of ammonium nitrate black powder mass concentration; wherein the mixed liquid medicine and the collecting liquid medicine are mixed according to the volume ratio of 1: 0.3-1.8.
2. The high-sulfur magnetite ore beneficiation reagent according to claim 1, wherein the mixed liquor and the collecting liquor are mixed according to a volume ratio of 1: 1.1.
3. The reagent for dressing high-sulfur magnetite ore according to claim 1, wherein the mixed solution contains 2.2% by mass of citric acid, 0.9% by mass of tartaric acid and 0.06% by mass of iron sulfide.
4. The reagent for mining high-sulfur magnetite ore according to claim 1, wherein the collecting chemical solution contains 15% by mass of ethidium, 6% by mass of sodium sulfide and 19% by mass of ammonium nitrate black.
5. The agent for high-sulfur magnetite ore dressing according to any one of claims 1 to 4, wherein the preparation process comprises a mixed solution preparation step, a collecting chemical solution preparation step, a mixed chemical solution and collecting chemical solution mixing step; the preparation method of the mixed solution comprises the steps of uniformly mixing citric acid, tartaric acid and iron sulfide, adding into water, and uniformly stirring to obtain the mixed solution; the collecting liquid medicine is prepared by uniformly mixing ethionine, sodium sulfide and ammonium nitrate, stirring into water, and uniformly stirring; the step of mixing the mixed liquid medicine and the collecting liquid medicine is to mix the mixed liquid medicine and the collecting liquid medicine evenly according to the volume ratio, and then the collecting liquid medicine is obtained.
6. A method for removing pyrrhotite from high-sulfur iron ore concentrate by flotation, wherein the high-sulfur magnetic iron ore concentrate chemical agent as claimed in any one of claims 1-5 is added in the flotation process, and after being uniformly stirred, a foaming agent is added for flotation.
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| CN110361412B (en) * | 2019-07-16 | 2021-09-14 | 北京矿冶科技集团有限公司 | Method for determining relative content of different magnetic pyrrhotites |
| CN112871458B (en) * | 2020-12-28 | 2022-07-22 | 山东金岭矿业股份有限公司 | Combined reagent for desulfurizing fine iron powder under alkaline condition and method for desulfurizing pyrrhotite by using combined reagent |
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| CN103316775B (en) * | 2013-05-21 | 2014-09-03 | 内蒙古科技大学 | High-sulfur magnetite concentrate efficient activated flotation desulfuration method |
| CN104353557B (en) * | 2014-10-09 | 2017-05-17 | 昆明冶金研究院 | Method for reducing sulphur content in iron ore concentrate through flotation process |
| CN105363564B (en) * | 2015-12-10 | 2017-10-13 | 内蒙古科技大学 | The desulfurization medicament of magnetic iron ore in flotation removing iron concentrate containing high sulphur |
| CN107243409B (en) * | 2017-07-27 | 2018-09-18 | 中钢集团马鞍山矿山研究院有限公司 | A kind of high-sulfur magnetic iron ore puies forward the beneficiation method of iron sulfur reduction |
| CN107899740A (en) * | 2017-10-10 | 2018-04-13 | 广东省资源综合利用研究所 | A kind of high arsenic-bearing pyrite concentrate pozzuolite separation ore-sorting technique containing magnetic iron ore |
| CN107790293B (en) * | 2017-10-26 | 2019-10-15 | 尤灵革 | A kind of zinc kiln slag comprehensive recycling process |
| CN108097453B (en) * | 2018-02-12 | 2019-09-10 | 内蒙古薪宝高科技开发有限公司 | The method of magnetic iron ore is removed from iron concentrate containing high sulphur |
| CN108097452B (en) * | 2018-02-12 | 2019-09-10 | 内蒙古薪宝高科技开发有限公司 | The ore-dressing technique of fine quality iron concentrate is produced from iron ore |
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