CN115780096A - Collector for collecting carbon and silicon by reverse flotation, and preparation method and application thereof - Google Patents
Collector for collecting carbon and silicon by reverse flotation, and preparation method and application thereof Download PDFInfo
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- CN115780096A CN115780096A CN202211376080.1A CN202211376080A CN115780096A CN 115780096 A CN115780096 A CN 115780096A CN 202211376080 A CN202211376080 A CN 202211376080A CN 115780096 A CN115780096 A CN 115780096A
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Abstract
The invention relates to a collector for collecting carbon and silicon by reverse flotation, and a preparation method and application thereof. The collecting agent is used for carrying out reverse flotation, decarburization and desilication on phosphogypsum waste residues, and specifically comprises the following steps: mixing and stirring the phosphogypsum waste residue ore pulp and the collecting agent, and performing reverse flotation operation to obtain the silicon-carbon-containing tailings and the phosphogypsum concentrate. The reverse flotation collector can realize an economical and efficient phosphogypsum mixed flotation silicon and carbon removal process in a strong acid environment, not only improves the grade and whiteness of the phosphogypsum, but also ensures high phosphogypsum recovery rate, and provides qualified raw materials for multipath large-scale utilization of the phosphogypsum.
Description
Technical Field
The invention relates to the field of phosphate chemical solid waste beneficiation, in particular to a collector for collecting carbon and silicon by reverse flotation, and a preparation method and application thereof.
Background
At present, the utilization rate of the phosphogypsum is lower than 10%, a large amount of land is used for stacking the phosphogypsum, precious land resources are occupied, and the strongly acidic phosphogypsum contains soluble phosphorus and fluorine, which causes secondary pollution to the environment, so that the harmless treatment and the comprehensive utilization of the phosphogypsum are problems to be solved urgently in the field of the resource treatment of a large amount of solid wastes.
At present, a relatively mature process applied to phosphogypsum flotation, desilication and decarbonization industry is a reverse flotation, decarbonization and forward flotation and desilication process under a strong acid environment, mineral oil and a foaming agent are adopted for reverse flotation and decarbonization, and then an amine cation collecting agent is adopted for forward flotation and desilication, so that the process is generally a process for separating coarse ore from fine ore and returning middlings.
For example, CN113695085A discloses a combined collector for desiliconizing and decarbonizing phosphogypsum and a preparation method of a solution thereof, wherein the combined collector comprises benzyl quaternary ammonium salt, nonpolar oil and/or alcohols. The reagent can realize synchronous desiliconization and decarburization in a strong acid environment, the whiteness of the phosphogypsum concentrate can be improved from about 43 to 48-50, the desiliconization rate is 30-40%, and the content of calcium sulfate dihydrate can be improved by about 3 points. Although the carbon can be synchronously desilicated, the desilication rate is low and is only about 30 percent, the content of the calcium sulfate dihydrate of the phosphogypsum is improved by about 3 points, and the method is suitable for retreatment of the phosphogypsum with relatively good quality and is not suitable for the phosphogypsum with the content of the calcium sulfate dihydrate lower than 90 percent.
CN102500469A discloses a process for desiliconizing and purifying phosphogypsum by reverse flotation, which is characterized in that 1-15kg/t of regulator (caustic soda, water glass, lime, hydrochloric acid and the like) and 1-10kg/t of collector (fatty acid and amine collectors) are added into phosphogypsum pulp, and the content of silicon dioxide in the phosphogypsum can be reduced from 8-13% to below 3% through one-time or two-time reverse flotation operation. Has the problems of large dosage of medicament, high medicament cost, general desiliconization selectivity and the like.
CN114308398A discloses a flotation, washing, decolorizing and purifying method of phosphogypsum, which comprises adding ether diamine into phosphogypsum pulp to perform triple coarse sweeping reverse flotation to obtain decolorized and purified phosphogypsum, adding a dispersant and removing fine impurities in a grading manner, and concentrating, filtering and drying to obtain the finished product of high-purity phosphogypsum. The desiliconization selectivity is general, and the phosphogypsum recovery rate is lower.
However, in the reverse flotation decarburization-forward flotation desilication process, return water must be recycled according to quality, the forward flotation desilication flotation is more and less, the flotation foam amount is large, the fixed investment and energy consumption are high, and the process flow is complex. Meanwhile, reverse flotation desilication is carried out in a strong alkaline environment, multiple filter pressing and ore washing are carried out, the pH value of phosphogypsum ore pulp is adjusted from strong acidity to weak acidity, a large amount of lime is added to control the pH value of the ore pulp to about 10, and then reverse flotation desilication is carried out, although the desilication rate is high and can reach about 80%, strong acid return water of multiple ore washing cannot be recycled, the ore dressing cost is high, a large amount of lime enters phosphogypsum concentrate, and adverse effects are brought to the application of phosphogypsum for building materials, such as reduction of gypsum strength.
In conclusion, the problems of complex treatment process and poor silicon carbon removal effect in the field of treatment of the phosphogypsum waste residue, which lead to poor whiteness and low grade of the obtained phosphogypsum product, and the like.
Disclosure of Invention
In view of the problems in the prior art, the invention aims to provide the collecting agent for collecting carbon and silicon by reverse flotation, the preparation method and the application thereof, and the collecting agent can realize an economic and efficient phosphogypsum mixed flotation silicon and carbon removal process in a strong acid environment, so that the grade and whiteness of phosphogypsum are improved, a high phosphogypsum recovery rate is ensured, and qualified raw materials are provided for multipath large-scale utilization of the phosphogypsum.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a collector for collecting carbon silicon by reverse flotation, wherein the collector comprises naphthenic acid imidazoline derivatives, mineral oil and ether alcohol.
The collecting agent provided by the invention adopts the specific naphthenic acid imidazoline derivative, the mineral oil and the ether alcohol for compounding, and can realize the synchronous removal of carbon and silicon in the phosphogypsum through a reverse flotation process, thereby improving the index of the phosphogypsum product, reducing the silicon dioxide content of the phosphogypsum, obviously improving the whiteness of the phosphogypsum, and being beneficial to the further full utilization of the phosphogypsum.
In the present invention, the mineral oil may be a mixture of saturated and unsaturated hydrocarbons, such as diesel, kerosene or transformer oil, as well as any oils commonly used in the art as required.
As a preferred technical scheme of the invention, the naphthenic acid imidazoline derivative comprises imidazoline quaternary ammonium salt.
Preferably, the ether alcohol comprises butyl ether alcohol.
In the invention, the ether alcohol is a single substance, namely, the ether containing the hydroxyl group, but not a mixture of the ether and the alcohol, such as propylene glycol butyl ether, 1, 2-propylene glycol ether, dipropylene glycol butyl ether or propylene glycol methyl ether.
As a preferable technical scheme of the invention, the collector comprises 4-6 parts of naphthenic acid imidazoline derivatives, 1-2 parts of mineral oil and 1-2 parts of ether alcohol in parts by weight.
In the present invention, the naphthenic acid imidazoline derivative in the collector is 4 to 6 parts by weight, for example, 4 parts, 4.2 parts, 4.4 parts, 4.6 parts, 4.8 parts, 5 parts, 5.2 parts, 5.4 parts, 5.6 parts, 5.8 parts, or 6 parts, but not limited to the recited values, and other values not recited in the range are also applicable.
In the present invention, the amount of the mineral oil in the collector is 1 to 2 parts by weight, and may be, for example, 1 part, 1.1 part, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, or 2 parts, but is not limited to the above-mentioned values, and other values not shown in the above range are also applicable.
In the present invention, the ether alcohol in the collector may be 1 to 2 parts by weight, for example, 1 part, 1.1 part, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts or 2 parts, but is not limited to the enumerated values, and other values not enumerated within this range are also applicable.
In a second aspect, the present invention provides a method for preparing a catalyst as described in the first aspect, the method comprising: mixing naphthenic acid imidazoline derivatives, mineral oil and ether alcohol according to a formula to obtain the collector.
In a third aspect, the invention provides the use of the catalyst in the first aspect, and the use includes that the collector is used for reverse flotation, decarburization and desilication of phosphogypsum waste residue, and the specific steps are as follows:
mixing and stirring the phosphogypsum waste residue ore pulp and the collecting agent, and performing reverse flotation to obtain silicon-carbon-containing tailings and phosphogypsum concentrate.
As the preferable technical scheme of the invention, the phosphogypsum waste residue ore pulp is obtained by mixing phosphogypsum waste residue and water;
preferably, the phosphogypsum waste residue comprises the following components in percentage by mass: caSO 4 ·2H 2 O 80-85％，SiO 2 5-10% of organic carbon and less than or equal to 2.0%.
In the invention, caSO in the phosphogypsum waste residue 4 ·2H 2 The content of O is 80 to 85% by mass, and may be, for example, 80%, 80.5%, 81%, 81.5%, 82%, 82.5%, 83%, 83.5%, 84%, 84.5%, 85% or the like, but is not limited to the values listed, and other values not listed in the range are also applicable.
In the invention, siO in the phosphogypsum waste residue 2 The content of the organic solvent is 5 to 10% by mass, and may be, for example, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, or 10%, but is not limited to the above-mentioned values, and other values not shown in the above-mentioned range are also applicable.
In the present invention, the content of organic carbon in the phosphogypsum waste residue is less than or equal to 2% by mass, and may be, for example, 2%, 1.9%, 1.8%, 1.7%, 1.6%, 1.5%, 1.4%, 1.3%, 1.2%, 1.1%, 1%, 0.9%, 0.8%, 0.7%, 0.6%, 0.5%, 0.4%, 0.3%, 0.2%, or 0.1%, etc., but is not limited to the values listed, and other values not listed in the range are also applicable.
In a preferred embodiment of the present invention, the slurry concentration of the phosphogypsum waste residue slurry is 20-45wt%, for example, 20wt%, 21wt%, 22wt%, 23wt%, 24wt%, 25wt%, 26wt%, 27wt%, 28wt%, 29wt%, 30wt%, 31wt%, 32wt%, 33wt%, 34wt%, 35wy%, 36wt%, 37wt%, 38wt%, 39wt%, 40wt%, 41wt%, 42wt%, 43wt%, 44wt% or 45wt%, etc., but not limited to the recited values, and other values not recited in the range are also applicable.
In the present invention, wt% means mass percentage.
Preferably, the pH of the phosphogypsum waste residue pulp is 0.5-2, for example 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 or 2 etc., but is not limited to the values recited and other values not recited in this range apply equally.
Preferably, the-0.074 mm solid particles in the phosphogypsum waste residue pulp account for 60-70% of the total solid particle mass, for example 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69% or 70% by mass, but not limited to the values listed, and other values not listed in this range are equally applicable.
In the present invention, the term "0.074 mm" means a product obtained by sieving with a 0.074mm sieve.
In a preferred embodiment of the present invention, the mixing and stirring time is 3 to 5min, for example, 3min, 3.2min, 3.4min, 3.6min, 3.8min, 4min, 4.2min, 4.4min, 4.6min, 4.8min or 5min, but is not limited to the above-mentioned values, and other values not listed in the above range are also applicable.
Preferably, the mixing speed of the mixing agitator is 1.5-2m/s, and may be, for example, 1.5m/s, 1.6m/s, 1.7m/s, 1.8m/s, 1.9m/s, 2m/s, etc., but is not limited to the values listed, and other values not listed in this range are also applicable.
As a preferred embodiment of the present invention, the reverse flotation operation is performed at least 1 time.
Preferably, the collector is added in an amount of 100-1000g/t, for example 100g/t, 150g/t, 200g/t, 250g/t, 300g/t, 350g/t, 400g/t, 450g/t, 500g/t, 550g/t, 600g/t, 650g/t, 700g/t, 750g/t, 800g/t, 850g/t, 900g/t, 950g/t, or 1000g/t, etc., but not limited to the recited values, and other values not recited in this range apply equally.
In the invention, the addition amount of the collecting agent is the total addition amount in the flotation operation, but not the single addition amount, and when the reverse flotation is adopted for multiple times, the sectional use amount can be adjusted according to the impurity content and the test.
In the invention, a g/t pointer adds flotation collecting agent with corresponding mass g to a certain amount of phosphogypsum waste residue.
In the invention, the times of the reverse flotation operation are designed according to the content of siliceous materials and carbonaceous materials in the phosphogypsum waste residues. And in multiple reverse flotation, the obtained phosphogypsum product is obtained by mixing the phosphogypsum concentrates obtained in each reverse flotation.
Preferably, the reverse flotation operation is open circuit reverse flotation.
As a preferable technical scheme of the invention, the application comprises the steps of carrying out reverse flotation, decarburization and desilication on phosphogypsum waste residues by adopting the collecting agent, which specifically comprises the following steps:
mixing and stirring phosphogypsum waste residue ore pulp and the collecting agent, and performing reverse flotation operation to obtain silicon-carbon-containing tailings and phosphogypsum concentrate;
the phosphogypsum waste residue ore pulp is obtained by mixing phosphogypsum waste residue and water; the phosphogypsum waste residue comprises the following components in percentage by mass: caSO 4 ·2H 2 O 80-85％，SiO 2 5-10% of organic carbon less than or equal to 2.0%; the pulp concentration of the phosphogypsum waste residue pulp is 20-45wt%; the pH value of the phosphogypsum waste residue ore pulp is 0.5-2; solid particles with the particle size of-0.074 mm in the phosphogypsum waste residue ore pulp account for 60-70% of the mass of all the solid particles;
the mixing and stirring time is 3-5min; the stirring speed of the mixing and stirring is 1.5-2m/s; the addition amount of the collecting agent is 100-1000g/t; the reverse flotation operation is carried out at least 1 time; the reverse flotation operation is open-circuit reverse flotation.
According to the scheme, water is added into the phosphogypsum waste residues for size mixing, the ore pulp flows into the stirring tank, then the reverse flotation collecting agent is added into the stirring tank for stirring and selective adsorption, the size-mixed material enters a reverse flotation system, mineralized foam scraped out by the scraper is tailings, the tailings are discharged, dense filter-pressed and stacked, the product in the tank is high-quality phosphogypsum, and the high-quality phosphogypsum is filtered and pressed and then enters a washing system. Backwater generated by the tailings and the phosphogypsum concentrate can be completely recycled, and consumption of reagents and water resources is reduced.
Compared with the prior art, the invention has the following beneficial effects:
(1) By adopting a specific compound medicament and one or two times of reverse flotation operation, the silicon-containing minerals and organic matters in the phosphogypsum waste residue are synchronously mixed and removed, so that the silicon dioxide content of the phosphogypsum is reduced (less than or equal to 2.85 percent), and the whiteness of the phosphogypsum is obviously improved (more than or equal to 53).
(2) Only one collecting agent is introduced in the flotation process, the process is simple, the cost of the agent is low, the return water can be completely recycled without being recycled according to the quality and special treatment, the agent and water resource consumption is saved, and the environment is not polluted.
(3) The reverse flotation process is suitable for a strong acid environment, is suitable for the pH environment of the slurry after phosphogypsum size mixing, has less and more floating, has high silicon content in tailing foam, can be directly used as tailing stockpiling or soil conditioner, and has good foam fluidity.
(4) The process can obtain high phosphogypsum recovery rate, means that most of the phosphogypsum becomes qualified raw materials for preparing building materials, acid and cement co-production and the like after reverse flotation mixed flotation impurity removal, obviously improves the consumption of the phosphogypsum, and is beneficial to sustainable development of the phosphorus chemical industry.
Drawings
FIG. 1 is a schematic diagram of a process for reverse flotation of carbon-silicon collector provided by the invention;
FIG. 2 is a process flow diagram in application example 1 of the present invention.
The present invention is described in further detail below. The following examples are merely illustrative of the present invention and do not represent or limit the scope of the claims, which are defined by the claims.
Detailed Description
To better illustrate the invention and to facilitate the understanding of the technical solutions thereof, typical but non-limiting examples of the invention are as follows:
example 1
The embodiment provides a collector for collecting carbon silicon by reverse flotation, which comprises 5 parts of naphthenic acid imidazoline derivative, 1 part of mineral oil and 1 part of ether alcohol by weight part;
the naphthenic acid imidazoline derivative is imidazoline quaternary ammonium salt, the ether alcohol is butyl ether alcohol, and the mineral oil is diesel oil and kerosene with the mass ratio of 1;
the reagent is obtained by mixing the reagents according to a formula.
Example 2
The embodiment provides a collector for collecting carbon silicon by reverse flotation, which comprises 6 parts of naphthenic acid imidazoline derivative, 2 parts of mineral oil and 1 part of ether alcohol by weight
The naphthenic acid imidazoline derivative is imidazoline quaternary ammonium salt, the ether alcohol is butyl ether alcohol, and the mineral oil is diesel oil;
the reagent is obtained by mixing the reagents according to a formula.
Example 3
The embodiment provides a collector for collecting carbon silicon by reverse flotation, which comprises 4 parts of naphthenic acid imidazoline derivative, 1 part of mineral oil and 2 parts of ether alcohol by weight
The naphthenic acid imidazoline derivative is imidazoline quaternary ammonium salt, the ether alcohol is butyl ether alcohol, and the mineral oil is transformer oil and kerosene;
the reagent is obtained by mixing the reagents according to a formula.
The imidazoline quaternary ammonium salt in the above example is imidazoline quaternary ammonium salt (RT-90G) produced by Jinan Fann.
Further, the invention provides a specific use process of the collector obtained, as shown in figure 1, the process is as follows: adding water into the phosphogypsum raw paste, namely waste residues, and mixing the phosphogypsum raw paste with the water, wherein the concentration of the pulp is controlled to be 20-45wt%, and the pH value of the pulp is controlled to be 0.5-2.0; and mixing and stirring the obtained strong acid ore pulp and a reverse flotation collector, and performing one or two times of mixed reverse flotation operation according to the content of impurities in the phosphogypsum raw paste to obtain the silicon-carbon-containing tailings and the phosphogypsum concentrate.
The specific application process is as follows:
application example 1
This example provides a beneficiation method for synchronous desiliconization and decarbonization of phosphogypsum, as shown in fig. 2, the phosphogypsum is produced by a wet-process phosphoric acid process of a hemihydrate-dihydrate method in north of Hu, and the silicon-containing minerals in the ore mainly comprise micro-fine quartz and wollastonite, caSO 4 ·2H 2 84.10 percent of O and SiO 2 The mass fraction was 7.32%, the organic carbon content fraction was 0.53%, and the whiteness was 31.
(1) Mixing the phosphogypsum raw paste, namely the waste residue, to control the concentration of the ore pulp to be 35 percent and the pH value of the ore pulp to be 1.0;
(2) The ore pulp obtained in the step (1) enters a stirring barrel to be mixed with a reverse flotation collector and then enters a flotation machine to be subjected to reverse flotation, desilication and decarburization and rough concentration 1 to obtain silicon-carbon-containing tailings 1 and phosphogypsum concentrate 1; after entering a middle box of a flotation machine, the phosphogypsum concentrate 1 is mixed with a reverse flotation mixed flotation collecting agent and then enters the flotation machine for reverse flotation desilication decarburization roughing 2 operation, so that silicon-carbon-containing tailings 2 and phosphogypsum concentrate 2 are obtained;
(3) And (3) combining the silicon-carbon-containing tailings 1 and the silicon-carbon-containing tailings 2 obtained in the step (2) into total tailings, filtering the phosphogypsum concentrate 2, drying at 45 ℃, and then aging to obtain the final phosphogypsum concentrate.
Wherein the addition amount of the reverse flotation collecting agent in the roughing 1 in the step (2) is 60g/t; the addition amount of the reverse flotation collecting agent in the roughing 2 process is 240g/t;
phosphogypsum concentrate CaSO finally obtained by the application example 4 ·2H 2 92.50% of O and SiO 2 The mass fraction was 2.51%, and the whiteness was 57.
Application example 2
The embodiment provides synchronous desiliconization and desiliconization of phosphogypsumThe carbon dressing method is that the phosphogypsum is produced by a wet-process phosphoric acid process of a certain dihydrate method in Hubei, and silicon-containing minerals in the ore mainly comprise micro-fine particle quartz and wollastonite and CaSO 4 ·2H 2 The mass fraction of O is 83.85 percent, and SiO is 2 The mass fraction is 8.67%, the organic carbon mass fraction is 0.65%, and the whiteness is 27.
The method comprises the following steps:
(1) Mixing the phosphogypsum raw paste, namely the waste residue, to control the concentration of the ore pulp to be 30 percent and the pH value of the ore pulp to be 1.5;
(2) The ore pulp obtained in the step (1) enters a stirring barrel to be mixed with a reverse flotation collecting agent, and then enters a flotation machine to be subjected to reverse flotation desilicication decarburization roughing 1 operation, so that silicon-carbon-containing tailings 1 and phosphogypsum concentrate 1 are obtained; after entering a middle box of a flotation machine, the phosphogypsum concentrate 1 is mixed with a reverse flotation mixed flotation collecting agent and then enters the flotation machine for reverse flotation desilication decarburization roughing 2 operation, so that silicon-carbon-containing tailings 2 and phosphogypsum concentrate 2 are obtained;
(3) And (3) combining the silicon-carbon-containing tailings 1 and the silicon-carbon-containing tailings 2 obtained in the step (2) into total tailings, and drying the phosphogypsum concentrate 2 at 45 ℃ after filtering to obtain the final phosphogypsum concentrate.
Wherein the addition amount of the reverse flotation collecting agent in the roughing 1 in the step (2) is 300g/t; the addition amount of the reverse flotation collecting agent in the roughing 2 process is 100g/t;
CaSO in phosphogypsum concentrate finally obtained by the application example 4 ·2H 2 93.10% by mass of O and SiO 2 The mass fraction was 2.85%, and the whiteness was 53.
Application example 3
The embodiment provides a beneficiation method for synchronously desiliconizing and decarbonizing phosphogypsum, wherein the phosphogypsum is produced by a wet-process phosphoric acid process by a dihydrate method in Sichuan, and silicon-containing minerals in ores mainly comprise micro-fine quartz and wollastonite and CaSO 4 ·2H 2 The mass fraction of O is 86.85 percent, and SiO is 2 The mass fraction of (a) was 7.05%, the mass fraction of organic carbon was 0.35%, and the whiteness was 38.
The method comprises the following steps:
(1) Mixing the phosphogypsum raw paste, namely waste residue, to control the concentration of the ore pulp to be 45 percent and the pH value of the ore pulp to be 0.8;
(2) The ore pulp obtained in the step (1) enters a stirring barrel to be mixed with a reverse flotation collector, and then enters a flotation machine to be subjected to reverse flotation, desilication, decarbonization and roughing operation, so that silicon-carbon-containing tailings 1 and phosphogypsum concentrate 1 are obtained;
(3) And (3) taking the silicon-carbon-containing tailings 1 obtained in the step (2) as final tailings, and drying the phosphogypsum concentrate 2 at 45 ℃ after filtering to obtain the final phosphogypsum concentrate.
Wherein the addition amount of the reverse flotation collecting agent in the roughing process in the step (2) is 350g/t;
phosphogypsum concentrate CaSO finally obtained by the application example 4 ·2H 2 94.52 percent of O and SiO 2 The mass fraction is 2.28 percent, and the whiteness is 58.
Application example 4
The difference from application example 3 is only that the naphthenic acid imidazoline derivative in the collector used in the reverse flotation process was replaced by an equal amount of naphthenic acid.
Phosphogypsum concentrate CaSO finally obtained by the application example 4 ·2H 2 The mass fraction of O is 86.25 percent, and SiO is 2 The mass fraction is 7.08 percent, and the whiteness is 40.
Application example 5
The difference from application example 3 was only that the alcohol ether in the collector used in the reverse flotation process was replaced by an equal amount of butanol.
Phosphogypsum concentrate CaSO finally obtained by the application example 4 ·2H 2 92.25% of O and SiO 2 The mass fraction is 3.78%, and the whiteness is 42.
Application example 6
The only difference from application example 3 was that the alcohol ether in the collector used in the reverse flotation process was replaced by an equal amount of butyl ether.
Phosphogypsum concentrate CaSO finally obtained by the application example 4 ·2H 2 92.38% of O and SiO 2 The mass fraction was 3.85%, and the whiteness was 41.
Application example 7
The only difference from application example 3 was that the alcohol ether in the collector used in the reverse flotation process was replaced by a mixture of equal amounts of butanol and butyl ether.
Phosphogypsum concentrate CaSO finally obtained by the application example 4 ·2H 2 92.15% of O and SiO 2 The mass fraction was 3.69%, and the whiteness was 41.
Application example 8
The only difference from application example 3 was that the alcohol ether in the collector used in the reverse flotation process was replaced by an equal amount of C10 ether amine.
Phosphogypsum concentrate CaSO finally obtained by the application example 4 ·2H 2 88.28 percent of O and SiO 2 The mass fraction was 6.34%, and the whiteness was 43.
According to the results of the above embodiment and application example, the compounded collector provided by the invention can effectively remove silicon and carbon in phosphogypsum under a strong acid condition, so that the silicon dioxide content of the phosphogypsum is reduced, and the whiteness of the phosphogypsum is obviously improved. Furthermore, the process is simple, the cost of the medicament is low, the return water can be completely recycled without separate recycling and special treatment, the medicament and water resource consumption is saved, and the environment is not polluted.
It is to be noted that the present invention is described by the detailed structural features of the present invention through the above embodiments, but the present invention is not limited to the detailed structural features, that is, it is not meant to imply that the present invention must be implemented by relying on the detailed structural features. It should be understood by those skilled in the art that any modifications of the present invention, equivalent substitutions of selected components of the present invention, additions of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that, in the above embodiments, the various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.
In addition, any combination of the various embodiments of the present invention can be made, and the same should be considered as the disclosure of the present invention as long as the idea of the present invention is not violated.
Claims (10)
1. The collector for collecting carbon and silicon by reverse flotation is characterized by comprising naphthenic acid imidazoline derivatives, mineral oil and ether alcohol.
2. The collector of claim 1, wherein the naphthenic acid imidazoline derivative comprises an imidazoline quaternary ammonium salt;
preferably, the ether alcohol comprises butyl ether alcohol.
3. A collector according to claim 1 or 2, comprising 4-6 parts by weight of naphthenic acid imidazoline derivative, 1-2 parts by weight of mineral oil and 1-2 parts by weight of ether alcohol.
4. A method of preparing the collector according to any one of claims 1 to 3, wherein the method of preparing comprises: mixing naphthenic acid imidazoline derivatives, mineral oil and ether alcohol according to a formula to obtain the collector.
5. The use of the collector according to any one of claims 1 to 3, characterized in that it comprises the use of the collector for the reverse flotation, decarbonisation and desilication of phosphogypsum residues, in particular as follows:
mixing and stirring the phosphogypsum waste residue ore pulp and the collecting agent, and performing reverse flotation to obtain silicon-carbon-containing tailings and phosphogypsum concentrate.
6. The use of claim 5, wherein the phosphogypsum waste residue pulp is obtained by mixing phosphogypsum waste residue with water;
preferably, the phosphogypsum waste residue comprises the following components in percentage by mass: caSO 4 ·2H 2 O 80-85％，SiO 2 5-10% of organic carbon and less than or equal to 2.0%.
7. The use according to claim 5 or 6, wherein the pulp concentration of the phosphogypsum waste residue pulp is 20-45wt%;
preferably, the pH value of the phosphogypsum waste residue ore pulp is 0.5-2;
preferably, the solid particles with the particle size of-0.074 mm in the phosphogypsum waste residue ore pulp account for 60-70% of the mass of all the solid particles.
8. Use according to any one of claims 5 to 7, wherein the mixing is for a period of 3 to 5min;
preferably, the stirring speed of the mixing stirring is 1.5-2m/s.
9. Use according to any one of claims 5 to 8, wherein the reverse flotation operation is carried out at least 1 time;
preferably, the addition amount of the collector is 100-1000g/t;
preferably, the reverse flotation operation is open-circuit reverse flotation.
10. The use according to any one of claims 5 to 9, characterized in that it comprises the use of said collector for the reverse flotation, decarbonisation and desilication of phosphogypsum residues, in particular as follows:
mixing and stirring phosphogypsum waste residue ore pulp and the collecting agent, and performing reverse flotation operation to obtain silicon-carbon-containing tailings and phosphogypsum concentrate;
the phosphogypsum waste residue ore pulp is obtained by mixing phosphogypsum waste residue and water; the phosphogypsum waste residue comprises the following components in percentage by mass: caSO 4 ·2H 2 O 80-85％，SiO 2 5-10% of organic carbon and less than or equal to 2.0%; the concentration of the phosphogypsum waste residue ore pulp is 20-45wt%; the pH value of the phosphogypsum waste residue ore pulp is 0.5-2; solid particles with the particle size of-0.074 mm in the phosphogypsum waste residue ore pulp account for 60-70% of the mass of all the solid particles;
the mixing and stirring time is 3-5min; the stirring speed of the mixing and stirring is 1.5-2m/s; the addition amount of the collecting agent is 100-1000g/t; the reverse flotation operation is carried out at least 1 time; the reverse flotation operation is open-circuit reverse flotation.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024037127A1 (en) * | 2023-06-05 | 2024-02-22 | 广东邦普循环科技有限公司 | Method for decolorizing and whitening phosphogypsum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024037127A1 (en) * | 2023-06-05 | 2024-02-22 | 广东邦普循环科技有限公司 | Method for decolorizing and whitening phosphogypsum |
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