CN111644269A - Method for comprehensively utilizing electrolytic manganese slag resources - Google Patents
Method for comprehensively utilizing electrolytic manganese slag resources Download PDFInfo
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- CN111644269A CN111644269A CN202010490701.3A CN202010490701A CN111644269A CN 111644269 A CN111644269 A CN 111644269A CN 202010490701 A CN202010490701 A CN 202010490701A CN 111644269 A CN111644269 A CN 111644269A
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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
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
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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
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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
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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
Abstract
A method for comprehensively utilizing electrolytic manganese slag resources comprises the following steps: adding electrolytic manganese slag and water into a flotation tank, and uniformly stirring to obtain flotation pulp; adding a surfactant into the obtained flotation pulp, carrying out flotation separation in advance to obtain foam and pulp, and enabling the obtained foam to enter a tailing pond; adjusting the pulp to be acidic by using a pH value regulator; adopting closed flotation of adding a cation collector in a roughing sectional mode, carrying out three-pass concentration, and returning the concentrated middlings to the previous-stage operation in sequence to obtain concentrate foam and tailing pulp; processing the obtained concentrate foam to obtain a white gypsum product; the obtained tailing pulp is further processed for manufacturing baking-free bricks or cement clinker. The invention realizes the high-efficiency separation of gypsum and gangue such as quartz, and produces high-quality anhydrous gypsum products with the purity of more than 95 percent; the tailings after flotation are fully utilized; the method has the advantages of simple and efficient process flow, low medicament cost and large treatment scale, and not only brings economic benefit to enterprises, but also effectively relieves the environmental protection pressure of the enterprises.
Description
Technical Field
The invention relates to a method for comprehensively utilizing solid wastes, in particular to a processing method for comprehensively utilizing electrolytic manganese residues.
Background
The electrolytic manganese slag is filter residue generated in the process of producing metal manganese by using manganese carbonate ore as a raw material and adopting an electrolytic method, the discharge amount of the filter residue is quite large, according to relevant statistics and reports, the discharge amount of the manganese slag discharged in each 1t of electrolytic manganese powder production is about 6-7t, 1.2-1.3 hundred million tons of electrolytic manganese slag stored in the open air in China currently exist, and about 1000 million tons of electrolytic manganese slag are newly discharged every year. Most of electrolytic manganese enterprises in China adopt a disposal method of slag storage for electrolytic manganese slag at the present stage, the manganese slag has fine particles and contains a certain amount of harmful elements, leachate waste water of the manganese slag is easy to enter water to cause environmental pollution, and a slag storage is easy to have dam break accidents. Therefore, the manganese slag is reasonably developed and utilized, thereby not only bringing good economic benefits to electrolytic manganese enterprises, but also generating good environmental benefits and social benefits.
At present, the utilization of manganese slag in China mainly focuses on the aspects of cement retarders, paste filling materials, baking-free bricks and the like: CN104129937A discloses a process method for recycling electrolytic manganese slag, which is to prepare cement retarder and manganese slag superfine powder after fully mixing, drying and calcining the electrolytic manganese slag, gypsum powder and lime powder; CN107129203A discloses a method for manufacturing an electrolytic manganese slag-based paste filling material, which takes original-state electrolytic manganese slag as a basic raw material, adds an electrolytic manganese slag-based cementing agent (ground electrolytic manganese slag powder, fluidized bed furnace slag, cement kiln dust, phosphorus slag powder and petroleum coke desulfurization ash), quickly stirs for 10-20min, adds water until the water content of the filling material reaches a specified value, and then stirs for 10-30min to obtain the electrolytic manganese slag-based paste filling material; CN110002829A discloses an electrolytic manganese slag baking-free brick and a preparation method thereof. The electrolytic manganese slag baking-free brick is obtained by extrusion, solidification and molding of a cementing agent M consisting of electrolytic manganese slag, lime, water-quenched slag and cement clinker, the electrolytic manganese slag, waste stone, water and the like. The utilization methods have simple process, but do not extract high-value components in the electrolytic manganese slag, have low utilization degree of the manganese slag and have insignificant economic benefit.
In addition, the manganese slag is utilized to recover manganese elements by washing or acid leaching the manganese slag again: CN108728634A discloses a harmless treatment method of electrolytic manganese slag, which comprises the following steps: (1) drying and crushing the electrolytic manganese slag, then roasting at low temperature to obtain a roasted material and generate a product containing NH3And SO2The flue gas of (2); (2) soaking the obtained roasted material in water, and then carrying out solid-liquid separation to obtain filter residue and manganese-containing filtrate; (3) and drying the filter residue obtained by separation to obtain harmless manganese residue, adding a precipitator into the manganese-containing filtrate to precipitate manganese, and performing solid-liquid separation after the manganese precipitation is finished to obtain manganese-precipitated liquid and a manganese-containing product. The method has the advantages of long process flow, high energy consumption and high cost.
The manganese slag comprehensively utilized by adopting the flotation method has the advantages of large treatment capacity, low economic cost and the like, but because the manganese slag contains organic matters, the interaction between a collecting agent and useful minerals is hindered, and the manganese slag has defoaming side effects, so that the problems of large dosage of flotation reagents, poor foamability, poor sorting property and the like are caused, and the flotation production is difficult to carry out. CN103214201A discloses a method for comprehensively utilizing electrolytic manganese slag. Firstly, carrying out flotation on electrolytic manganese residues in a flotation machine to obtain dihydrate gypsum; carrying out strong magnetic separation on the tailings after flotation to obtain ferromanganese bulk concentrate and tailings; smelting the ferromanganese bulk concentrate to obtain manganese-rich slag; the dihydrate gypsum obtained by the flotation through the smelting waste heat is calcined and deaminated, desulfurized to prepare ammonia water and prepared to prepare sulfuric acid and co-produce cement, and finally discharged tailings are nontoxic and harmless and can be used for producing baking-free bricks, land reclamation or underground filling. The method has good internal circulation, but has long process flow, is not easy to realize co-production, has poor flotation process effect of inhibiting quartz and collecting gypsum by adopting water glass in a manganese slag complex system and has low gypsum concentrate grade, the influence of organic matters in the manganese slag on flotation is not considered, and the flotation production is not easy to realize.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and provides a method for comprehensively utilizing the electrolytic manganese slag resources, which has the advantages of simple process, low cost and capability of obtaining high-quality gypsum and recycling tailings.
The technical scheme adopted by the invention for solving the technical problems is as follows: a comprehensive utilization method of electrolytic manganese slag resources comprises the following steps:
(1) size mixing: adding electrolytic manganese slag and water into a flotation tank, and uniformly stirring to obtain flotation pulp;
(2) adding a surfactant into the ore pulp to construct a flotation environment: adding a surfactant into the flotation pulp obtained in the step (1) to perform organic matter pre-flotation separation to obtain foam and pulp;
(3) adjusting the pH value of the ore pulp: adjusting the pH value of the ore pulp obtained in the step (2) by using a pH value adjusting agent until the ore pulp is acidic;
(4) flotation separation: adopting a closed flotation process of adding a cation collector in rough concentration sections, carrying out three-step concentration, and returning concentrated middlings to the previous step in sequence to obtain concentrate foam and tailing pulp;
(5) concentrate treatment: carrying out solid-liquid separation on the concentrate foam obtained in the step (4); the filtrate is backwater, and the filter cake is dried to obtain gypsum concentrate; heating and drying the gypsum concentrate in a rotary kiln to remove crystal water to obtain a white gypsum product;
(6) treating tailings: combining the tailing pulp obtained in the step (4) with the foam obtained in the step (2), and performing solid-liquid separation to obtain tailing and filtrate; the filtrate is backwater, and the tailings are used for manufacturing baking-free bricks or cement clinker.
Preferably, the electrolytic manganese slag comprises gypsum, quartz, muscovite, pyrite, manganese sulfate, organic matter and ammonia nitrogen compounds.
Preferably, in the step (1), the water is the return water or/and the tap water obtained in the step (5) and the step (6).
Preferably, in the step (1), the mass concentration of the flotation ore pulp is 20.0-35.0%.
Preferably, in the step (2), the surfactant is one or more of pine oil, terpineol oil, methyl isobutyl carbinol (MIBC), isooctanol and n-butanol.
Preferably, in the step (2), the dosage of the surfactant is 30-80 g/t of raw ore. At the use amount, the obtained foam is oily substances such as organic matters and the like.
Preferably, in the step (3), the pH adjuster is one or more of sulfuric acid, hydrochloric acid, and phosphoric acid.
Preferably, in the step (3), the pH value of the ore pulp is adjusted to 1.8-2.4; the electronegativity of the useful mineral gypsum in the manganese slag is opposite to that of the gangue mineral surface under the pH value condition, so that an environment for efficiently separating the gypsum from the gangue is created.
Preferably, in the step (4), the cationic collector is one or more than two of CJ-1 collector, dodecylamine and octadecylamine.
Preferably, in the step (4), the dosage of the cationic collector is 80-200g/t of raw ore, the cationic collector is added in two times, and the dosage ratio of the first time to the second time is 7-5: 3-5. Collecting agent and pH value regulator are not added in the concentration process.
And (4) separating gypsum from gangue, wherein the gypsum enters concentrate foam, and the gangue enters tailing pulp.
Preferably, in the step (5), the temperature for heating and drying in the rotary kiln is 350-450 ℃.
In the step (5), the grade of the gypsum concentrate obtained by drying the filter cake is higher than 95.0%.
The principle of the invention is as follows: creatively adopts a method for constructing a flotation environment and recombining the surface properties of minerals to produce a high-quality gypsum product: firstly, a flotation environment is constructed, a surfactant is added, organic matters in manganese slag are removed by flotation, and defoaming of the organic matters in a flotation system is avoided to influence collection; then adjusting the pH value of the ore pulp until the ore pulp is acidic, recombining the surface properties of the minerals to ensure that the electrical property of useful mineral gypsum is opposite to that of the gangue minerals, and adding a collecting agent to realize the efficient separation of the gypsum and the gangue minerals; and finally, drying to obtain high-quality gypsum which can be directly used as a building material product, drying the obtained tailings to obtain a baking-free brick raw material or further processing the dried tailings into cement clinker, and realizing the high-efficiency, harmless, fine and multi-product comprehensive utilization of the electrolytic manganese slag without secondary pollution.
The invention has the beneficial effects that: (1) a flotation environment is constructed, a surfactant is added to remove organic matters in the manganese slag in advance, and the organic matters are prevented from entering a flotation system to cause adverse effects on gypsum flotation; (2) the surface properties of the minerals are recombined to create an ore pulp low pH value environment, so that the electronegativity of the useful mineral gypsum in the manganese slag is opposite to that of the gangue minerals, and the efficient separation of the gypsum and the gangue such as quartz is realized; (3) the high added value utilization of gypsum is realized, the high-quality anhydrous gypsum product with the purity of more than 95 percent is produced, and the economic benefit of an enterprise is improved; (4) the tailings after flotation can be used as raw materials for manufacturing baking-free bricks or further processed into cement clinker, so that the manganese slag is efficiently and harmlessly utilized; (5) the method has the advantages of simple and efficient process flow, low medicament cost, large treatment scale and obvious product benefit, and not only brings economic benefit to enterprises, but also effectively relieves the environmental protection pressure of the enterprises.
Detailed Description
The present invention is further illustrated by the following examples.
The cationic collector used in example 1 is commercial industrial grade dodecylamine, the cationic collector used in examples 2 and 3 is CJ-1 collector produced by Zhonglan chemical engineering and technology Co., Ltd, and the CJ-1 collector is a short-chain aliphatic amine and surfactant complex reagent.
Unless otherwise specified, the following percentages are all expressed by mass.
Example 1
(1) Size mixing: certain electrolytic manganese slag contains gypsum, quartz, muscovite, pyrite, manganese sulfate, organic matters and ammonia nitrogen compounds, and the chemical composition of the electrolytic manganese slag comprises the following components: CaO 11.07%, SiO230.54%、Fe2O33.26%、Al2O34.58%、SO4 2-27.83%、MnO22.33 percent and LOI (loss on ignition) 18.06 percent; weighing 100.0 kg of the electrolytic manganese slag and 300.0kg of tap water, mixing and pulping in batches, and stirring for 5min in a flotation tank;
(2) constructing a flotation environment: adding 60g/t of surfactant terpineol oil into raw ore, stirring for 2min, and carrying out organic matter pre-flotation separation to obtain foam and ore pulp; and (4) reserving the obtained foam, combining the foam with the tailings in the step (4), and then carrying out solid-liquid separation. The ore slurry system in the flotation tank is a structured flotation environment and waits for the next operation;
(3) adjusting the pH value of the ore pulp, recombining the surface properties of minerals: adding dilute sulfuric acid with the concentration of 10% into the ore pulp obtained in the step (2), adjusting the pH value of the ore pulp to 2.1, stirring for 2min after the pH value is adjusted to recombine the surface properties of the minerals in the ore pulp, wherein the surface of gypsum is positively charged and the surface of gangue minerals is negatively charged;
(4) flotation separation: adding a roughing cationic collector dodecylamine into the ore pulp obtained in the step (3), wherein the dosage of the dodecylamine is 120g/t of raw ore, the first addition amount of the roughing is 80g/t of the raw ore, the second addition amount of the roughing is 40g/t of the raw ore, the roughing ore concentrate is subjected to three-pass concentration, no chemical is added in the concentration, and the concentration middlings are sequentially returned to the previous-stage operation to obtain ore concentrate foam and tailing ore pulp;
(5) concentrate treatment: transferring the concentrate foam in the step (4) to a thickening tank, performing solid-liquid separation by using a ceramic filter, wherein the filtrate is return water, and the filter cake is dried to obtain 30.16kg of gypsum concentrate, wherein the content of dihydrate gypsum is 95.87%, and the content of silicon dioxide is 3.21%; drying and dehydrating the gypsum concentrate at 450 ℃ in a rotary kiln to obtain 23.84kg of gypsum product, wherein the content of calcium sulfate is 94.83 percent, and the content of silicon dioxide is 4.02 percent; returning the return water to the step (1) for size mixing;
(6) treating tailings: transferring the tailing pulp obtained in the step (4) to a tailing pond, combining the tailing pulp with the foam obtained in the step (2), and transferring the mixture to a filter to perform solid-liquid separation to obtain tailing and filtrate; the filtrate is backwater, tailings are dried to obtain 61.20kg of tailings, and the tailings comprise the following components: MnSO49.45%、CaSO4•2H2O 7.22%、FeS212.90%、Al2O310.75%、SiO253.21 percent, evenly mixing the tailings, industrial sintering slag and cement to prepare the baking-free brick; returning the return water to the step (1) for size mixing.
Example 2
(1) Size mixing: certain electrolytic manganese slag contains gypsum, quartz, muscovite, pyrite, manganese sulfate, organic matters and ammonia nitrogen compounds, and the chemical composition of the electrolytic manganese slag comprises the following components: CaO 12.64%, SiO221.63%、Fe2O35.05%、Al2O34.93%、SO322.60%、MnO24.30%、K2O2.79%, LOI 13.86%; weighing 100.0 kg of the electrolytic manganese slag and 400.0kg of tap water, mixing and pulping in batches, and stirring in a flotation tank for 3 min;
(2) constructing a flotation environment: adding 80.0g/t of surfactant terpineol oil into raw ore, stirring for 2min, and performing organic matter pre-flotation separation to obtain foam and ore pulp; and (4) reserving the obtained foam, combining the foam with the tailings in the step (4), and then carrying out solid-liquid separation. The ore slurry system in the flotation tank is a structured flotation environment and waits for the next operation;
(3) adjusting the pH value of the ore pulp, recombining the surface properties of minerals: adding 10% dilute sulfuric acid into the ore pulp obtained in the step (2), adjusting the pH value of the ore pulp to about 1.8, stirring for 2min after the pH value is adjusted to recombine the surface properties of the minerals in the ore pulp, wherein the surface of gypsum is positively charged and the surface of gangue minerals is negatively charged;
(4) flotation separation: adding a roughing cationic collector CJ-1 into the ore pulp obtained in the step (3), wherein the dosage of the CJ-1 is 160g/t of raw ore, the first addition of the roughing is 100g/t of raw ore, the second addition of the roughing is 60g/t of raw ore, the roughing concentrate is subjected to three-pass concentration, no agent is added in the concentration, and the middling in the concentration returns to the previous-stage operation in sequence to obtain concentrate foam and tailing ore pulp;
(5) concentrate treatment: transferring the concentrate foam in the step (4) to a thickening tank, performing solid-liquid separation by using a ceramic filter, wherein the filtrate is return water, and the filter cake is dried to obtain 32.65kg of gypsum concentrate, wherein the content of dihydrate gypsum is 96.31 percent, and the content of silicon dioxide is 2.53 percent; drying and dehydrating the gypsum concentrate at 400 ℃ in a rotary kiln to obtain 26.07kg of gypsum product, wherein the content of calcium sulfate is 95.38 percent, and the content of silicon dioxide is 3.17 percent; returning the return water to the step (1) for size mixing;
(6) treating tailings: transferring the tailing pulp obtained in the step (4) to a tailing pond, combining the tailing pulp with the foam obtained in the step (2), and transferring the mixture to a filter to perform solid-liquid separation to obtain tailing and filtrate; the filtrate is backwater, the tailings are dried to obtain 60.71kg of tailings, and the tailings comprise the following components: CaO 4.23%, SiO245.37%、Fe2O37.24%、Al2O310.45%、SO314.20%、MnO28.87%、K2O4.13 percent, and delivering the tailings to a cement plant to mix with gypsum ore, calcining and grinding to prepare cement clinker; returning the return water to the step (1) for size mixing.
Example 3
(1) Size mixing: certain electrolytic manganese slag contains gypsum, quartz, muscovite, pyrite, manganese sulfate, organic matters and ammonia nitrogen compounds, and the chemical composition of the electrolytic manganese slag comprises the following components: CaO 15.77%, SiO223.96%、Fe2O35.24%、Al2O36.21%、SO321.23%、MnO24.21%、K2O1.39% and LOI 13.11%; weighing 100.0 kg of the electrolytic manganese slag and 250.0kg of tap water, mixing and pulping in batches, and stirring for 5min in a flotation tank;
(2) constructing a flotation environment: adding surfactant terpineol oil 70.0g/t raw ore, stirring for 2min, and performing organic matter pre-flotation separation to obtain foam and ore pulp; and (4) reserving the obtained foam, combining the foam with the tailings in the step (4), and then carrying out solid-liquid separation. The ore slurry system in the flotation tank is a structured flotation environment and waits for the next operation;
(3) adjusting the pH value of the ore pulp, recombining the surface properties of minerals: adding dilute sulfuric acid with the concentration of 10% into the ore pulp obtained in the step (2), adjusting the pH value of the ore pulp to be about 2.0, stirring for 2min after the pH value is adjusted to recombine the surface properties of the minerals in the ore pulp, wherein the surface of gypsum is positively charged and the surface of gangue minerals is negatively charged;
(4) flotation separation: adding a roughing cationic collector CJ-1 into the ore pulp obtained in the step (3), wherein the dosage of the CJ-1 is 200g/t of raw ore, the first addition amount of roughing is 100g/t of raw ore, the second addition amount of roughing is 100g/t of raw ore, roughing concentrate is subjected to three-pass concentration, no agent is added in the concentration, and the middling in the concentration returns to the previous-stage operation in sequence to obtain concentrate foam and tailing ore pulp;
(5) concentrate treatment: transferring the concentrate foam in the step (4) to a filter for solid-liquid separation, wherein the filtrate is return water, and the filter cake is dried to obtain 40.03kg of gypsum concentrate, wherein the content of dihydrate gypsum is 96.81%, and the content of silicon dioxide is 2.23%; drying and dehydrating the gypsum concentrate at 350 ℃ in a rotary kiln to obtain 31.92kg of gypsum product, wherein the content of calcium sulfate is 96.0 percent, and the content of silicon dioxide is 2.80 percent; returning the return water to the step (1) for size mixing;
(6) treating tailings: transferring the tailing pulp obtained in the step (4) to a tailing pond, combining the tailing pulp with the foam obtained in the step (2), and transferring the mixture to a filter to perform solid-liquid separation to obtain tailing and filtrate; the filtrate is backwater, tailings are dried to obtain 54.33kg of tailings, and the tailings comprise the following components: CaO 5.80%, SiO242.45%、Fe2O39.64%、Al2O311.43%、SO35.90%、MnO27.75%、K2O2.56 percent, conveying the tailings to a cement plant, mixing with gypsum ore, calcining and grinding to obtain cement clinker; returning the return water to the step (1) for size mixing.
Claims (10)
1. The method for comprehensively utilizing the electrolytic manganese slag resources is characterized by comprising the following steps of:
(1) adding electrolytic manganese slag and water into a flotation tank, and uniformly stirring to obtain flotation pulp;
(2) adding a surfactant into the flotation pulp obtained in the step (1) to perform organic matter pre-flotation separation to obtain foam and pulp;
(3) adjusting the pH value of the ore pulp obtained in the step (2) by using a pH value adjusting agent until the ore pulp is acidic;
(4) adopting closed flotation of adding a cation collector in a roughing sectional mode, carrying out three-pass concentration, and returning the concentrated middlings to the previous-stage operation in sequence to obtain concentrate foam and tailing pulp;
(5) carrying out solid-liquid separation on the concentrate foam obtained in the step (4); the filtrate is backwater, and the filter cake is dried to obtain gypsum concentrate; heating and drying the gypsum concentrate in a rotary kiln to remove crystal water to obtain a white gypsum product;
(6) combining the tailing pulp obtained in the step (4) with the foam obtained in the step (2), and performing solid-liquid separation to obtain tailing and filtrate; the filtrate is backwater, and the tailings are used for manufacturing baking-free bricks or cement clinker.
2. The method for comprehensively utilizing the electrolytic manganese slag resource according to claim 1, wherein the electrolytic manganese slag comprises gypsum, quartz, muscovite, pyrite, manganese sulfate, organic matters and ammonia nitrogen compounds.
3. The method for comprehensively utilizing the electrolytic manganese slag resources according to the claim 1 or 2, characterized in that in the step (1), the water is the return water or/and the tap water obtained in the step (5) and the step (6).
4. The method for comprehensively utilizing the electrolytic manganese slag resources according to any one of claims 1 to 3, wherein in the step (1), the mass concentration of the flotation pulp is 20.0-35.0%.
5. The method for comprehensively utilizing the electrolytic manganese slag resources according to any one of claims 1 to 4, wherein in the step (2), the surfactant is one or more of pine oil, terpineol oil, methyl isobutyl carbinol, isooctanol and n-butanol; the dosage of the surfactant is 30-80 g/t of raw ore.
6. The method for comprehensively utilizing the electrolytic manganese slag resources according to any one of claims 1 to 5, wherein in the step (3), the pH value regulator is one or more than two of sulfuric acid, hydrochloric acid and phosphoric acid.
7. The method for comprehensively utilizing the electrolytic manganese slag resources according to any one of claims 1 to 6, characterized in that in the step (3), the pH value of the ore pulp is adjusted to 1.8-2.4.
8. The method for comprehensively utilizing the electrolytic manganese slag resources according to any one of claims 1 to 7, wherein in the step (4), the cationic collector is one or more than two of CJ-1 collector, dodecylamine and octadecylamine.
9. The method for comprehensively utilizing the electrolytic manganese slag resources according to any one of claims 1 to 8, wherein in the step (4), the dosage of the cationic collector is 80-200g/t of raw ore, the cationic collector is added in two times, and the dosage ratio of the first time to the second time is 7-5: 3-5.
10. The method for comprehensively utilizing the electrolytic manganese slag resources according to any one of claims 1 to 9, wherein in the step (5), the temperature for heating and drying the rotary kiln is 350 to 450 ℃.
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| CN113289768A (en) * | 2021-05-20 | 2021-08-24 | 四川同庆南风有限责任公司 | Efficient mirabilite gypsum flotation purification process |
| CN114505166A (en) * | 2020-11-16 | 2022-05-17 | 中蓝长化工程科技有限公司 | Method for harmlessly transforming barium slag and recycling barium salt |
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| CN101638300A (en) * | 2009-07-11 | 2010-02-03 | 花垣县强桦矿业有限责任公司 | Method for preparing cement clinker by taking lead-zinc tailing and electrolytic manganese pressing filter residue as raw materials |
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| US20140216987A1 (en) * | 2013-02-05 | 2014-08-07 | Vale S.A. | Process for concentrating manganese ores via reverse cationic flotation of silicates |
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| CN114505166A (en) * | 2020-11-16 | 2022-05-17 | 中蓝长化工程科技有限公司 | Method for harmlessly transforming barium slag and recycling barium salt |
| CN114505166B (en) * | 2020-11-16 | 2023-10-17 | 中蓝长化工程科技有限公司 | Method for harmlessly recycling barium slag and recycling barium salt |
| CN113289768A (en) * | 2021-05-20 | 2021-08-24 | 四川同庆南风有限责任公司 | Efficient mirabilite gypsum flotation purification process |
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