Iron ore reverse flotation low-temperature collecting agent and preparation method thereof

Abstract

The invention belongs to the technical field of mineral processing flotation reagents, and particularly relates to an iron ore reverse flotation low-temperature collecting agent and a preparation method thereof, the iron ore reverse flotation low-temperature collecting agent comprises the following raw materials by weight: 60-100 parts of sodium aliphatate, 10-30 parts of MES, 10-30 parts of soybean oleic acid, 5-10 parts of an anionic surfactant, 1-5 parts of sodium dodecyl benzene sulfate, and 5-15 parts of a palm light component. The iron ore reverse flotation low-temperature collecting agent is wide in raw material source, good in stability, simple in manufacturing process and low in production cost; and meanwhile, the low-temperature collecting agent for reverse flotation of the iron ore is high in beneficiation efficiency at low temperature, the grade of obtained fine iron powder is high, and the yield of concentrate is increased. The iron ore reverse flotation low-temperature collecting agent does not cause harm to the environment and human bodies, belongs to a green and environment-friendly collecting agent, and has a wide application prospect.

Description

Technical Field

[0001] This invention relates to the field of mineral processing flotation reagents, specifically to a low-temperature collector for iron ore reverse flotation and its preparation method. Background Technology

[0002] Mineral processing is a specialized discipline in materials science and technology that separates, enriches, and further processes natural mineral resources using physical, chemical, and biological methods. Its technical system includes basic processes such as crushing, grinding, gravity separation, and flotation, and extends to new technologies such as composite physical field separation and biological extraction. Its applications have expanded from traditional mineral resource development to emerging fields such as tailings recycling and marine resource development.

[0003] Flotation reagents are chemical agents used in the mineral flotation process to adjust the surface properties of minerals, increase or decrease their floatability, and make the pulp properties and foam stability more favorable for mineral separation. Among mineral processing reagents, flotation reagents were the earliest to be used, and they have the most varieties and significant benefits.

[0004] The existing technology has the following defects or problems:

[0005] Existing iron ore reverse flotation collectors have poor stability and low beneficiation efficiency under low temperature conditions, which affects the yield of concentrate. In addition, they are prepared by relatively complex processes, resulting in high production costs. Their composition cannot be effectively controlled, which can easily affect the environment.

[0006] It should be noted that the above content falls within the inventor's technical knowledge and does not necessarily constitute prior art. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a low-temperature collector for iron ore reverse flotation and its preparation method, thus solving the current problems.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a low-temperature collector for iron ore reverse flotation, comprising the following raw materials in parts by weight:

[0009] 60-100 parts of sodium fatty acid;

[0010] MES 10-30 copies;

[0011] 10-30 parts soybean oleic acid;

[0012] 5-10 parts of anionic surfactant;

[0013] 1-5 parts of sodium dodecylbenzene sulfate;

[0014] 5-15 parts of light components of palm fatty acids;

[0015] 1-5 parts of compound stabilizer;

[0016] Dispersant 1-5 parts.

[0017] In some embodiments, the pH value of the sodium fatty acid needs to be adjusted to 9-11.

[0018] In some embodiments, the anionic surfactant is composed of pentadecyl sulfonate, sodium dodecylbenzene sulfate, and sodium oleoyloxyethanesulfonate in a mass ratio of 1:2-5:3-8.

[0019] In some embodiments, the compound stabilizer is specifically selected from polyvinyl alcohol, and the dispersant is specifically selected from polyphosphate.

[0020] Another technical problem to be solved by the present invention is to provide a method for preparing a low-temperature collector for iron ore reverse flotation, comprising the following steps:

[0021] Step 1: Weigh out sodium fatty acid, soybean oil, and light components of palm fatty acid according to the proportion, mix them thoroughly, and then add water to make a mixed soap solution. The amount of water used is 2-10 times the total weight of sodium fatty acid, soybean oil, and light components of palm fatty acid.

[0022] Step 2: Adjust the pH of the mixture to 9-11, then heat it at 100-200 degrees Celsius for 30-150 minutes.

[0023] Step 3: Adjust the pH of the heated mixture to alkaline, and separate the oil phase after standing.

[0024] Step 4: Take anionic surfactant, pentadecyl sulfonate, sodium dodecylbenzene sulfate, compound stabilizer and dispersant in proportion, add them to the oil phase substance, and mix thoroughly to obtain the low-temperature collector for iron ore reverse flotation.

[0025] In some embodiments, the amount of water added is 3-5 times the total weight of sodium fatty acid, soybean oleic acid, and palm fatty acid light components.

[0026] In some embodiments, the reagent used to adjust the pH of the mixture is either sodium carbonate or sodium hydroxide.

[0027] In some embodiments, the heating temperature is controlled at 120-150 degrees Celsius, and the heating time is controlled at 60-120 minutes.

[0028] In some embodiments, sulfuric acid is used as the reagent to adjust the pH of the mixture.

[0029] In some embodiments, the sulfuric acid concentration is 50-90 wt%.

[0030] Compared with the prior art, the present invention provides a low-temperature collector for iron ore reverse flotation and its preparation method, which has the following beneficial effects:

[0031] This invention discloses a low-temperature collector for iron ore reverse flotation and its preparation method. The raw materials used in this invention are widely available, have good stability, and the manufacturing process is simple and inexpensive. Furthermore, the low-temperature collector improves the efficiency of mineral processing at low temperatures, resulting in high-grade iron concentrate and increased concentrate yield. This iron ore reverse flotation low-temperature collector is harmless to the environment and human health, making it a green and environmentally friendly collector with broad application prospects. Moreover, the preparation method of this collector, through precise raw material ratios and strict processing control, provides effective flotation results under low-temperature conditions. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the process structure for preparing the low-temperature collector for iron ore reverse flotation according to the present invention. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be understood that the step numbers used in the text are for ease of description only and are not intended to limit the order in which the steps are performed.

[0035] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0036] The terms “comprising” and “including” indicate the presence of the described feature, whole, step, operation, element and / or component, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0037] The term “and / or” refers to any combination of one or more of the associated listed items, as well as all possible combinations, and includes these combinations.

[0038] In this embodiment: a low-temperature collector for iron ore reverse flotation comprises the following raw materials in parts by weight:

[0039] Sodium fatty acid 60-100 parts, the pH value of sodium fatty acid needs to be adjusted to 9-11. Its function is to adsorb mineral surfaces through hydrophobic interaction, promote the combination of mineral particles and bubbles, and improve flotation efficiency. At low temperature, the hydrophilicity and surface activity of sodium fatty acid are particularly important, which can ensure that the collector can still work efficiently under low temperature conditions.

[0040] MES (methyl ether sulfonate) 10-30 parts, or alkyl ether sulfonate, has excellent dispersibility and foam stability. In the reverse flotation process of iron ore, MES can improve the contact between mineral particles and foam. Especially under low temperature conditions, the role of MES becomes more important. It helps to avoid foam breakage or resettling of mineral particles, ensuring the stability of the reverse flotation process.

[0041] Soybean oleic acid 10-30 parts. As a plant-derived oily substance, soybean oleic acid mainly provides lubrication and surface activity, which can improve the stability of the collector and the affinity of mineral particles. It helps to improve the flotation process of mineral particles, especially at low temperatures. Through lubrication and slow release, it can enhance the reverse flotation effect.

[0042] The anionic surfactant, comprising 5-10 parts of phenylpentadecanyl sulfonate, sodium dodecylbenzene sulfate, and sodium oleoyloxyethanesulfonate in a mass ratio of 1:2-5:3-8, plays a role in reducing the surface tension of water, promoting foam stability, and improving the surface activity of mineral particles in the collector. These surfactants are particularly helpful in improving the collection effect under low-temperature conditions.

[0043] Sodium dodecylbenzene sulfate (1-5 parts) is mainly used to enhance the stability of foam. It forms stable bubbles during flotation, helping mineral particles float better on the liquid surface and preventing them from settling at low temperatures.

[0044] The light component of palm fatty acids (5-15 parts) increases the lubricity and antifreeze properties of the collector. At low temperatures, palm fatty acids enhance the stability of the collector, preventing it from becoming ineffective due to temperature drops.

[0045] 1-5 parts of a compound stabilizer, specifically polyvinyl alcohol, are used to improve the adhesion of the collector, especially at low temperatures, effectively increasing the affinity between mineral particles and foam.

[0046] 1-5 parts of dispersant, specifically polyphosphate, can prevent mineral particles from agglomerating or settling during flotation, especially for some mineral particles that are prone to settling at low temperatures.

[0047] Please see Figure 1Based on the aforementioned low-temperature collector for iron ore reverse flotation, a method for preparing such a collector is proposed, comprising the following steps:

[0048] Step 1: Weigh out sodium fatty acid, soybean oil, and light components of palm fatty acid according to the proportion, mix them thoroughly, and then add water to make a mixed soap solution. The amount of water used is 2-10 times the total weight of sodium fatty acid, soybean oil, and light components of palm fatty acid.

[0049] Step 2: Adjust the pH of the mixture to 9-11, then heat it at 100-200 degrees Celsius for 30-150 minutes.

[0050] The reagent used to adjust the pH value of the mixture is either sodium carbonate or sodium hydroxide.

[0051] The heating temperature is controlled at 120-150 degrees Celsius, and the heating time is controlled at 60-120 minutes.

[0052] Step 3: Adjust the pH of the heated mixture to alkaline, and separate the oil phase after standing.

[0053] The reagent used to adjust the pH value of the mixture is sulfuric acid, and the concentration of the sulfuric acid is 50-90 wt%.

[0054] Step 4: Take anionic surfactant, pentadecyl sulfonate phenyl ester, and sodium dodecylbenzene sulfate in proportion, add them to the oil phase substance, and mix thoroughly to obtain the low-temperature collector for iron ore reverse flotation.

[0055] It should be noted that the amount of water added in this embodiment is 3-5 times the total weight of sodium fatty acid, soybean oleic acid, and palm fatty acid light components.

[0056] Based on the above-mentioned low-temperature collector for iron ore reverse flotation and its preparation method, a comparative experiment was conducted. The specific experimental contents are shown in the table below:

[0057]

[0058] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0059] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A low-temperature collector for reverse flotation of iron ore, characterized in that, Including the following parts by weight of raw materials: 60-100 parts of sodium fatty acid; MES 10-30 copies; 10-30 parts soybean oleic acid; 5-10 parts of anionic surfactant; 1-5 parts of sodium dodecylbenzene sulfate; 5-15 parts of light components of palm fatty acids; 1-5 parts of compound stabilizer; Dispersant 1-5 parts.

2. The low-temperature collector for iron ore reverse flotation according to claim 1, characterized in that: The pH value of the sodium fatty acid needs to be adjusted to 9-11.

3. The low-temperature collector for iron ore reverse flotation according to claim 1, characterized in that: The anionic surfactant is composed of pentadecyl sulfonate, sodium dodecylbenzene sulfate, and sodium oleoyloxyethanesulfonate in a mass ratio of 1:2-5:3-8.

4. The low-temperature collector for iron ore reverse flotation according to claim 1, characterized in that: The stabilizer is specifically selected from polyvinyl alcohol, and the dispersant is specifically selected from polyphosphate.

5. A method for preparing a low-temperature collector for iron ore reverse flotation, characterized in that, Includes the following steps: Step 1: Weigh out sodium fatty acid, soybean oil, and light components of palm fatty acid according to the proportion, mix them thoroughly, and then add water to make a mixed soap solution. The amount of water used is 2-10 times the total weight of sodium fatty acid, soybean oil, and light components of palm fatty acid. Step 2: Adjust the pH of the mixture to 9-11, then heat it at a temperature of 100-200 degrees Celsius for 30-150 minutes. Step 3: Adjust the pH of the heated mixture to alkaline, and separate the oil phase after standing. Step 4: Take anionic surfactant, pentadecyl sulfonate, sodium dodecylbenzene sulfate, compound stabilizer and dispersant in proportion, add them to the oil phase substance, and mix thoroughly to obtain the low-temperature collector for iron ore reverse flotation.

6. The method for preparing a low-temperature collector for iron ore reverse flotation according to claim 5, characterized in that: The amount of water added in step one is 3-5 times the total weight of sodium fatty acid, soybean oleic acid, and palm fatty acid light components.

7. The method for preparing a low-temperature collector for iron ore reverse flotation according to claim 5, characterized in that: In step two, the reagent used to adjust the pH value of the mixture is either sodium carbonate or sodium hydroxide.

8. The method for preparing a low-temperature collector for iron ore reverse flotation according to claim 5, characterized in that: The heating temperature in step two is controlled at 120-150 degrees Celsius, and the heating time is controlled at 60-120 minutes.

9. The method for preparing a low-temperature collector for iron ore reverse flotation according to claim 5, characterized in that: The reagent used to adjust the pH value of the mixture in step three is sulfuric acid.

10. The method for preparing a low-temperature collector for iron ore reverse flotation according to claim 9, characterized in that: The sulfuric acid concentration is 50-90 wt%.

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