CN108906336B - Iron ore reverse flotation reagent and using method thereof - Google Patents
Iron ore reverse flotation reagent and using method thereof Download PDFInfo
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- CN108906336B CN108906336B CN201811036005.4A CN201811036005A CN108906336B CN 108906336 B CN108906336 B CN 108906336B CN 201811036005 A CN201811036005 A CN 201811036005A CN 108906336 B CN108906336 B CN 108906336B
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- flotation
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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
- B03D2201/007—Modifying reagents for adjusting pH or conductivity
-
- 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
- B03D2201/06—Depressants
-
- 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
- B03D2203/04—Non-sulfide ores
Abstract
The invention discloses an iron ore reverse flotation reagent and a using method thereof, wherein the iron ore reverse flotation reagent comprises the following components in parts by weight: 50-60 parts of dodecylamine salt, 40-50 parts of dodecyltrimethylammonium chloride, 10-15 parts of sodium fluoride, 10-15 parts of sodium silicate, 10-15 parts of polyacrylamide, 15-20 parts of sodium tripolyphosphate, 10-20 parts of an inhibitor and 3-5 parts of a pH regulator. The invention has the beneficial effects that: the iron ore reverse flotation reagent has high separation selectivity on useful minerals and gangue minerals.
Description
Technical Field
The invention relates to iron ore, in particular to an iron ore reverse flotation reagent and a using method thereof.
Background
The iron ore resources in China have the characteristics of low raw ore taste, complex composition, fine embedded particle size and the like, and the requirement of smelting is difficult to achieve only by the traditional magnetic separation process. Flotation plays an increasingly important role in iron ore dressing. Flotation is realized by flexibly and effectively controlling the flotation process through a flotation reagent, and useful minerals and gangue minerals are successfully separated. The method for discharging gangue minerals in ore pulp as tailings is called direct flotation, and vice versa.
Chinese patent publication No. CN103495506A discloses a chemical agent for reverse flotation of iron ore and a combined use method thereof. The reagent for reverse flotation of the iron ore comprises a pH regulator sodium hydroxide, a desorbent, an inhibitor caustic corn starch, an activator calcium oxide and a fatty acid collecting agent, wherein the desorbent comprises the following raw material components in parts by weight: 40-42 parts of water glass, 4-6 parts of carboxymethyl cellulose and 7-9 parts of polycarboxylate, wherein the water glass modulus is 1-2, the viscosity of the carboxymethyl cellulose is 800-1200mPa & s, the substitution degree is not less than 0.9, the molecular weight of the polycarboxylate is 3000-4000, and the solid content is 40%.
However, the agent for reverse flotation of iron ore has not high selectivity for separation of useful minerals from gangue minerals, and thus is in need of improvement.
Disclosure of Invention
The invention aims to provide an iron ore reverse flotation reagent. The iron ore reverse flotation reagent has high separation selectivity on useful minerals and gangue minerals.
The technical purpose of the invention is realized by the following technical scheme:
an iron ore reverse flotation reagent comprises the following components in parts by weight:
50-60 parts of dodecylamine salt
40-50 parts of dodecyl trimethyl ammonium chloride
10-15 parts of sodium fluoride
10-15 parts of water glass
10-15 parts of polyacrylamide
Sodium tripolyphosphate 15-20 parts
10-20 parts of inhibitor
3-5 parts of a pH regulator.
The invention is further configured to: according to the weight portion, the water-soluble paint also comprises 20-25 portions of complexing agent.
The invention is further configured to: the complexing agent is one of sodium tartrate, sodium oxalate, sodium citrate and EDTA disodium.
The invention is further configured to: the dodecylamine salt is dodecylamine acetate.
The invention is further configured to: the inhibitor comprises sodium humate and sodium lignin sulfonate, wherein the weight ratio of the sodium humate to the sodium lignin sulfonate is 1: 1.
The invention is further configured to: the pH regulator is sodium hydroxide or sodium carbonate.
Another object of the present invention is to provide a method for using the above iron ore reverse flotation reagent, comprising the following steps:
step 1: controlling the temperature to be 5-15 ℃, adjusting the iron rough concentrate into ore pulp with the weight concentration of 40-45%, adding a pH regulator during rough concentration to enable the pH value of the ore pulp to reach 11, then adding an inhibitor, then adding part of sodium fluoride, then adding water glass and polyacrylamide, finally adding part of dodecylamine salt, part of dodecyltrimethylammonium chloride, part of complexing agent and part of sodium tripolyphosphate, fully stirring, and then sending the ore pulp into a flotation machine for rough flotation operation;
step 2: performing rough flotation to obtain rough flotation concentrate, performing fine flotation to the rough flotation concentrate, adding residual sodium fluoride, residual dodecylamine salt, residual dodecyltrimethylammonium chloride, residual complexing agent and residual sodium tripolyphosphate to the rough flotation concentrate in fine flotation group operation, wherein the concentrate in the fine flotation operation is final flotation concentrate, and tailings in the fine flotation operation return to the rough flotation operation;
and step 3: the rough flotation operation obtains rough flotation tailings, the rough flotation tailings enter three-section scavenging sorting operation, the concentrate of the first-section scavenging operation returns to the rough flotation operation, the concentrate of the second-section scavenging operation returns to the first-section scavenging operation, the concentrate of the third-section scavenging operation returns to the second-section scavenging operation, the tailings of the first-section scavenging operation enter the second-section scavenging operation, the tailings of the second-section scavenging operation enter the third-section scavenging operation, and the three-section scavenging tailings are final flotation tailings.
The invention is further configured to: in the step 1, the addition amount of the sodium fluoride, the dodecylamine salt, the dodecyltrimethylammonium chloride, the complexing agent and the sodium tripolyphosphate is half of the total amount.
In conclusion, the invention has the following beneficial effects:
1. the collecting capacity of the dodecaamine salt is strong, but the defoaming speed is slow; while dodecyltrimethylammonium chloride has a weaker collecting power but a faster defoaming speed. The dodecylamine salt and the dodecyltrimethylammonium chloride are compounded and combined, so that the collecting capacity and the defoaming speed are balanced;
2. compared with dodecylamine hydrochloride, dodecylamine acetate can reduce the acidity of the system, thereby reducing the corrosion to equipment and prolonging the service life of the equipment;
3. the sodium fluoride can be adsorbed and covered on the surface of the feldspar mineral to activate the feldspar mineral, so that the adsorption of the dodecylamine salt and the dodecyltrimethylammonium chloride on the surface of the feldspar mineral is enhanced;
4. the water glass can be adsorbed on the surfaces of iron mineral particles, so that the electrostatic repulsion among the particles is enhanced, and fine particles are dispersed;
5. when the iron ore has fine embedded particle size, effective separation can be carried out after fine grinding. The problems of slow sedimentation, long filtration time and the like often exist in the concentration and dehydration of the ultrafine ore particles. The polyacrylamide flocculates micro-fine mineral particles into clusters through a bridging effect, so that the concentration of fine concentrate is accelerated, the loss of the fine concentrate is prevented, and the sedimentation effect is improved;
6. the sodium tripolyphosphate has good defoaming capability, so that the problems of foam stickiness and poor fluidity caused by introduction of dodecylamine salt are solved;
7. the sodium humate and the sodium lignin sulfonate can improve the wettability of iron minerals, so that the iron minerals can be well contacted with an aqueous solution, the probability of contacting bubbles in the mineral flotation process is reduced, and the quartz flotation is promoted;
8. the complexing agent can generate stable metal chelate with metal cations (adsorbed or inherent on the surface of the mineral) on the surface of the silicate mineral, the stable metal chelate is transferred into a liquid phase, and the metal cations are concealed in the liquid phase, so that repeated pollution to the mineral is prevented, and selective deactivation inhibition is realized.
Detailed Description
Examples 1-5 are provided to illustrate the components of an iron ore reverse flotation reagent. Examples 1-5 the composition of the iron ore reverse flotation reagent is shown in table 1.
TABLE 1, EXAMPLES 1-5 composition Table of iron ore reverse flotation agent
Note: the unit "parts" means parts by weight; the dodecylamine salt is dodecylamine acetate; the inhibitor comprises sodium humate and sodium lignin sulfonate, and the weight ratio of the sodium humate to the sodium lignin sulfonate is 1: 1.
The method of using the agent for reverse flotation of iron ore, i.e., the step of flotation of iron ore, is described in detail below with reference to table 1.
A method for using a reverse flotation reagent for iron ores comprises the following steps:
step 1: controlling the temperature to be 5-15 ℃, adjusting the iron rough concentrate into ore pulp with the weight concentration of 40-45%, adding a pH regulator during rough concentration to enable the pH value of the ore pulp to reach 11, then adding an inhibitor, then adding half of sodium fluoride, then adding water glass and polyacrylamide, finally adding half of dodecylamine salt, half of dodecyltrimethylammonium chloride, half of complexing agent and half of sodium tripolyphosphate, fully stirring, and then sending the ore pulp into a flotation machine to enter rough flotation operation;
step 2: performing rough flotation to obtain rough flotation concentrate, performing fine flotation to the rough flotation concentrate, adding residual sodium fluoride, residual dodecylamine salt, residual dodecyltrimethylammonium chloride, residual complexing agent and residual sodium tripolyphosphate to the rough flotation concentrate in fine flotation group operation, wherein the concentrate in the fine flotation operation is final flotation concentrate, and tailings in the fine flotation operation return to the rough flotation operation;
and step 3: the rough flotation operation obtains rough flotation tailings, the rough flotation tailings enter three-section scavenging sorting operation, the concentrate of the first-section scavenging operation returns to the rough flotation operation, the concentrate of the second-section scavenging operation returns to the first-section scavenging operation, the concentrate of the third-section scavenging operation returns to the second-section scavenging operation, the tailings of the first-section scavenging operation enter the second-section scavenging operation, the tailings of the second-section scavenging operation enter the third-section scavenging operation, and the three-section scavenging tailings are final flotation tailings.
TABLE 2 parameter table of the using method of iron ore reverse flotation reagent
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Step 1 temperature/. degree.C | 5 | 10 | 7 | 13 | 15 |
| Step 1 pulp concentration/%) | 45 | 42 | 43 | 44 | 40 |
Comparative example 1
Example 2 of chinese patent publication No. CN103495506A was selected as comparative example 1. Wherein the temperature of the flotation operation is controlled to be 10 ℃ in the whole process.
Flotation test
The raw ore with iron grade of 44.35% was subjected to flotation according to the procedures of examples 1-5 and comparative example 1, respectively, and the corresponding flotation indexes are shown in table 3.
TABLE 3, EXAMPLES 1-5 AND COMPARATIVE EXAMPLE 1 flotation index COMPARATIVE RECORDING TABLE
As can be seen from Table 3, the iron grade and iron yield of the concentrate obtained in examples 1-5 are higher than those of comparative example 1, while the iron grade and iron yield of the tailings are lower than those of comparative example 1. Therefore, the iron ore reverse flotation reagent has high separation selectivity on useful minerals and gangue minerals.
Comparative example 2
Comparative example 2 differs from example 2 in that sodium tripolyphosphate was removed and the rest is the same as example 2.
Comparative example 3
Comparative example 3 differs from example 2 in that the complexing agent was removed, and the rest is the same as example 2.
Comparative example 4
Comparative example 4 differs from example 2 in that sodium tripolyphosphate and the complexing agent are removed simultaneously, and the rest is the same as example 2.
Example 2 and comparative examples 2 to 4 were tested with reference to flotation tests, and the flotation indexes obtained by the tests are recorded in table 4.
TABLE 4, EXAMPLE 2 and COMPARATIVE EXAMPLES 2-4 flotation index comparative records
From table 4, the following conclusions can be drawn:
in example 2, indexes such as the concentrate iron taste and the iron yield, the tailing iron taste and the tailing iron yield are better than those of comparative examples 2 and 3.
Comparative example 4 indexes such as concentrate iron taste and iron yield and tailing iron taste and iron yield are inferior to those of comparative example 2, but similar to those of comparative example 3. Therefore, the complexing agent can improve the separation selectivity of the useful minerals and the gangue minerals, and the sodium tripolyphosphate has small influence on the separation selectivity of the useful minerals and the gangue minerals. However, the combination of the complexing agent and sodium tripolyphosphate results in an increase in the separation selectivity for the useful mineral and the gangue mineral that is greater than the sum of the increases in the separation selectivity for the useful mineral and the gangue mineral resulting from the use of each of the complexing agent and sodium tripolyphosphate alone. Therefore, the complexing agent and the sodium tripolyphosphate can generate a compounding effect in the invention, and the separation selectivity of useful minerals and gangue minerals is improved.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (7)
1. An iron ore reverse flotation reagent is characterized in that: the composition comprises the following components in parts by weight:
50-60 parts of dodecylamine salt
40-50 parts of dodecyl trimethyl ammonium chloride
10-15 parts of sodium fluoride
10-15 parts of water glass
10-15 parts of polyacrylamide
Sodium tripolyphosphate 15-20 parts
10-20 parts of inhibitor
3-5 parts of a pH regulator;
according to the weight portion, the water-soluble paint also comprises 20-25 portions of complexing agent.
2. An iron ore reverse flotation reagent according to claim 1, wherein: the complexing agent is one of sodium tartrate, sodium oxalate, sodium citrate and EDTA disodium.
3. An iron ore reverse flotation reagent according to claim 2, wherein: the dodecylamine salt is dodecylamine acetate.
4. An iron ore reverse flotation reagent according to claim 2, wherein: the inhibitor comprises sodium humate and sodium lignin sulfonate, wherein the weight ratio of the sodium humate to the sodium lignin sulfonate is 1: 1.
5. An iron ore reverse flotation reagent according to claim 2, wherein: the pH regulator is sodium hydroxide or sodium carbonate.
6. A method of using the agent for reverse flotation of iron ore according to claim 2, characterized in that: the method comprises the following steps:
step 1: controlling the temperature to be 5-15 ℃, adjusting the iron rough concentrate into ore pulp with the weight concentration of 40-45%, adding a pH regulator during rough concentration to enable the pH value of the ore pulp to reach 11, then adding an inhibitor, then adding part of sodium fluoride, then adding water glass and polyacrylamide, finally adding part of dodecylamine salt, part of dodecyltrimethylammonium chloride, part of complexing agent and part of sodium tripolyphosphate, fully stirring, and then sending the ore pulp into a flotation machine for rough flotation operation;
step 2: performing rough flotation to obtain rough flotation concentrate, performing fine flotation to the rough flotation concentrate, adding residual sodium fluoride, residual dodecylamine salt, residual dodecyltrimethylammonium chloride, residual complexing agent and residual sodium tripolyphosphate to the rough flotation concentrate in fine flotation group operation, wherein the concentrate in the fine flotation operation is final flotation concentrate, and tailings in the fine flotation operation return to the rough flotation operation;
and step 3: the rough flotation operation obtains rough flotation tailings, the rough flotation tailings enter three-section scavenging sorting operation, the concentrate of the first-section scavenging operation returns to the rough flotation operation, the concentrate of the second-section scavenging operation returns to the first-section scavenging operation, the concentrate of the third-section scavenging operation returns to the second-section scavenging operation, the tailings of the first-section scavenging operation enter the second-section scavenging operation, the tailings of the second-section scavenging operation enter the third-section scavenging operation, and the three-section scavenging tailings are final flotation tailings.
7. The method of using an iron ore reverse flotation reagent according to claim 6, wherein: in the step 1, the addition amount of the sodium fluoride, the dodecylamine salt, the dodecyltrimethylammonium chloride, the complexing agent and the sodium tripolyphosphate is half of the total amount.
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| CN109622233B (en) * | 2018-12-12 | 2020-08-21 | 东北大学 | Reverse flotation desilication method for hematite |
| CN112299597A (en) * | 2020-10-13 | 2021-02-02 | 东北大学 | Method for removing impurities from coal gasification ash water by using flotation technology |
| CN112588450A (en) * | 2020-11-26 | 2021-04-02 | 江西省三汇科技有限公司 | Humic acid-containing beneficiation inhibitor and application method thereof |
| CN113441282A (en) * | 2021-06-30 | 2021-09-28 | 蒙自矿冶有限责任公司 | Application of sodium glucoheptonate in flotation separation of tin and iron |
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