A two-stage short-process flotation process for high-calcium mica-type fluorite

Abstract

The present invention belongs to the technical field of the step-by-step flotation process of fluorite ore, and discloses a two-stage short-process flotation process for high-calcium mica-type fluorite, especially a flotation recovery process for the raw ore of calcium carbonate-mica-fluorite (CaCO3≥15%, mica minerals≥30%). Through a two-stage flotation process and by using the method of segmentally inhibiting gangue minerals with macromolecular high-efficiency inhibitors, a chemical-grade fluorite concentrate with CaF2≥93% can be obtained. The process of the present invention eliminates the disadvantages of long process, excessive reagents and low recovery rate of high-grade fluorite in the conventional flotation process. At the same time, the shortening of the flotation process can effectively reduce energy consumption, improve the drying and filtration efficiency of the concentrate powder, reduce the ore dressing production cost, and has relatively high on-site feasibility, with good economic and social benefits.

Description

Technical Field

[0001] The present invention relates to the technical field of the step-by-step flotation process of fluorite ore, and particularly relates to a two-stage short-process flotation process for high-calcium mica-type fluorite. Background Art

[0002] As an important source of the chemical element fluorine, fluorite is an important raw material for manufacturing hydrofluoric acid and fluorides in the chemical industry. And the uses of fluorine in the chemical field cannot be replaced by other elements. Therefore, fluorite resources are defined as non-renewable precious resources. Although fluorite resources are very rich, they are characterized by: many lean ores and many hybridization phenomena, which makes it difficult to meet the requirements of effectively recovering high-quality fluorite ore products in production, especially the flotation process effects of different types of fluorite ores vary greatly.

[0003] Fluorite ores are mainly divided into three types: quartz type, quartz-calcite type, and quartz-barite type. And the mica-calcite type is relatively less. A large number of studies have shown that it is difficult to separate fluorite from associated impurities under the action of conventional oleic acid, soda ash, and water glass agents. Moreover, the flotation process of traditional refractory fluorite ores with high calcium carbonate-mica often uses one rough selection and eight or nine fine selections to obtain high-grade fluorite concentrate. The significant disadvantage of this beneficiation method is that the process is long, the energy consumption is high, and on-site regulation is difficult, especially the large dosage of reagents and excessive interference. For fluorite ores containing two types of impurities, calcite and mica, if the traditional fluorite flotation process is used, the dosage of flotation reagents is large, and the interference between reagents is serious. Therefore, it is not suitable for refractory fluorite with calcite-mica type, resulting in a low recovery rate of high-grade fluorite concentrate. Summary of the Invention

[0004] The purpose of the present invention is to provide a two-stage short-process flotation process for high-calcium mica-type fluorite to solve the technical problems of large dosage of flotation reagents and long process existing in the prior art.

[0005] In order to achieve the above-mentioned invention purpose, the present invention provides the following technical solutions:

[0006] The present invention provides a two-stage short-process flotation process for high-calcium mica-type fluorite, including the following steps:

[0007] Grind the high-calcium carbonate-mica-fluorite raw ore and add water to form pulp, and then through a primary inhibition process and a secondary inhibition process, finally obtain fluorite concentrate;

[0008] The primary inhibition process includes one rough selection and two fine selection processes, and the two fine selection processes are fine selection I and fine selection II;

[0009] The specific process of the one rough selection is as follows:

[0010] Adjust the pH of the pulp with Na2CO3, and then successively add an inhibitor composed of water glass and dextrin and a collector to float fluorite to obtain rough concentrate and rough tailings; the rough concentrate enters the first cleaning process;

[0011] The specific processes of the first cleaning and the second cleaning are independently: add the inhibitor dextrin;

[0012] The secondary inhibition process includes three cleaning processes, namely cleaning III, cleaning IV, and cleaning V;

[0013] The specific processes of cleaning III, cleaning IV, and cleaning V are independently: add an inhibitor composed of dilute sulfuric acid and tannic acid.

[0014] Preferably, in the above-mentioned two-stage short-process flotation process for high-calcium mica-type fluorite, the rough tailings obtained from the first roughing process are subjected to two scavenging processes;

[0015] The two scavenging processes are scavenging I and scavenging II;

[0016] The scavenged concentrate I obtained in the scavenging I process enters the roughing process for treatment, and the scavenged rough ore I obtained in the scavenging I process enters the scavenging II process for treatment;

[0017] The scavenged concentrate II obtained in the scavenging II process enters the scavenging I process for treatment, and the scavenged tailings II obtained in the scavenging II process are tailings.

[0018] Preferably, in the above-mentioned two-stage short-process flotation process for high-calcium mica-type fluorite, the tailings obtained in the first cleaning process enter the roughing process, the tailings obtained in the second, third, fourth, and fifth cleaning processes respectively enter the corresponding previous cleaning process, the concentrates obtained in the first, second, third, and fourth cleaning processes respectively enter the corresponding next cleaning process, and the concentrate obtained in the fifth cleaning process is fluorite concentrate.

[0019] Preferably, in the above-mentioned two-stage short-process flotation process for high-calcium mica-type fluorite, in the first roughing process, the collector is saponified oleic acid, and the dosage of saponified oleic acid is 400 - 800 g / t.

[0020] Preferably, in the above-mentioned two-stage short-process flotation process for high-calcium mica-type fluorite, in the first roughing process, the dosage of Na2CO3 is 500 - 1500 g / t, the pH of the pulp is adjusted to 9 - 10, the dosage of water glass is 500 - 800 g / t, and the dosage of dextrin is 200 - 300 g / t.

[0021] Preferably, in the above-mentioned two-stage short-process flotation process for high-calcium mica-type fluorite, the total dosage of the inhibitor dextrin added in the first and second cleaning processes is 200 - 400 g / t;

[0022] During the processes of the third, fourth, and fifth concentration stages, the total amount of dilute sulfuric acid added is 300 - 500 g / t, and the total amount of tannic acid added is 100 - 200 g / t.

[0023] Preferably, in the above-mentioned two-stage short-process flotation process for high-calcium mica-type fluorite, the proportion of the ground raw ore with a fineness of -200 mesh is 80 - 90 wt%, and the concentration of the pulp is 20 - 50%.

[0024] Preferably, in the above-mentioned two-stage short-process flotation process for high-calcium mica-type fluorite, the high-calcium carbonate-mica-fluorite raw ore, by mass percentage, comprises the following substances:

[0025] CaF2 ≥ 30%, CaCO3 ≥ 15%, mica minerals ≥ 30%;

[0026] The mica minerals are one or more of muscovite, sericite, and phlogopite.

[0027] From the above technical solutions, it can be seen that compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The two-stage short-process flotation process for high-calcium carbonate-mica-fluorite ore provided by the present invention firstly greatly reduces the concentration times and significantly reduces the energy consumption. Secondly, it is divided into two-stage inhibition processes with a large differentiation degree and low regulation difficulty. Finally, through the combined use of the macromolecular high-efficiency inhibitors of dextrin and tannic acid, not only high-quality and high-recovery fluorite concentrate products are ensured, but also the medicaments are non-toxic, harmless, and easily degradable, which greatly facilitates the subsequent treatment of tailings and tail water.

[0029] (2) The two-stage short-process flotation process for high-calcium mica-type refractory fluorite ore provided by the present invention has a simple process, high on-site feasibility, and low energy consumption. Green and efficient medicaments are used to recover valuable fluorite concentrate, reducing the environmental pollution of subsequent tailings and tail water, and having good economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0031] Figure 1 is the flotation process flow of conventional high-calcium carbonate-mica-fluorite raw ore;

[0032] Figure 2 is the process flow of Example 1. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The present invention provides a two-stage short-process flotation process for high-calcium mica-type fluorite, comprising the following steps:

[0034] After grinding the high-calcium carbonate-mica-fluorite raw ore and adding water to form a pulp, it then undergoes a primary inhibition process and a secondary inhibition process, and finally fluorite concentrate is obtained;

[0035] The primary inhibition process includes one rough selection and two cleaning processes, and the two cleaning processes are cleaning I and cleaning II;

[0036] The specific process of the one rough selection is as follows:

[0037] Use Na2CO3 to adjust the pH of the pulp, and then successively add an inhibitor composed of water glass and dextrin and a collector to float fluorite to obtain rough concentrate and rough tailings; the rough concentrate enters the cleaning I process;

[0038] The specific processes of cleaning I and cleaning II are independently: adding the inhibitor dextrin;

[0039] The secondary inhibition process includes three cleaning processes, and the three cleaning processes are cleaning III, cleaning IV, and cleaning V;

[0040] The specific processes of cleaning III, cleaning IV, and cleaning V are independently: adding an inhibitor composed of dilute sulfuric acid and tannic acid.

[0041] In the present invention, the rough tailings obtained from the one rough selection process are preferably subjected to two scavenging processes;

[0042] The two scavenging processes are scavenging I and scavenging II; the present invention does not limit the scavenging process, and methods well-known to those skilled in the art can be used.

[0043] The scavenged concentrate I obtained from the scavenging I process enters the rough selection process for treatment, and the scavenged rough ore I obtained from the scavenging I process enters the scavenging II process for treatment;

[0044] The scavenged concentrate II obtained from the scavenging II process enters the scavenging I process for treatment, and the scavenged tailings II obtained from the scavenging II process are tailings;

[0045] The scavenging I is to recover the rough tailings and no reagents need to be added;

[0046] The scavenging II is to recover the scavenged rough ore I and no reagents need to be added.

[0047] In the present invention, the tailings obtained from the cleaning I process enter the rough selection process, the tailings obtained from the cleaning II, III, IV, and V processes respectively enter the corresponding previous cleaning process, the concentrates obtained from the cleaning I, II, III, and IV processes respectively enter the corresponding next cleaning process, and the concentrate obtained from the cleaning V process is fluorite concentrate.

[0048] In the present invention, during the first rough selection process, the collector is preferably saponified oleic acid, more preferably sodium oleate. The dosage of saponified oleic acid is preferably 400 - 800 g / t, more preferably 400, 450, 500, 550, 600, 650, 700, 750 or 800 g / t, and even more preferably 500, 550, 600, 650 or 700 g / t.

[0049] In the present invention, during the first rough selection process, the dosage of Na2CO3 is preferably 500 - 1500 g / t, more preferably 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400 or 1500 g / t, and even more preferably 900, 1000, 1100 or 1200 g / t; the pH of the pulp is preferably adjusted to 9 - 10; the dosage of water glass is preferably 500 - 800 g / t, more preferably 500, 550, 600, 650, 700, 750 or 800 g / t, and even more preferably 550, 600, 650 or 700 g / t; the dosage of dextrin is preferably 200 - 300 g / t, more preferably 200, 220, 240, 260, 280 or 300 g / t, and even more preferably 220, 240 or 260 g / t.

[0050] In the present invention, during the first cleaning I and first cleaning II processes, the total dosage of the inhibitor dextrin added is preferably 200 - 400 g / t, more preferably 200, 250, 300, 350 or 400 g / t, and even more preferably 300, 350 or 400 g / t;

[0051] During the third cleaning, fourth cleaning and fifth cleaning processes, the total amount of dilute sulfuric acid added is preferably 300 - 500 g / t, more preferably 300, 350, 400, 450 or 500 g / t, and even more preferably 400, 450 or 500 g / t; the total amount of tannic acid added is preferably 100 - 200 g / t, more preferably 100, 120, 140, 160, 180 or 200 g / t, and even more preferably 140, 160 or 180 g / t; the concentration of the dilute sulfuric acid is preferably ≤ 20 wt%, more preferably 5, 8, 10, 12, 15, 18 or 20 wt%, and even more preferably 8, 10, 12 or 15 wt%.

[0052] In the present invention, the proportion of particles -200 mesh in the original ore after grinding is preferably 80 - 90 wt%, more preferably 80, 82, 84, 86, 88 or 90 wt%, and even more preferably 84, 86 or 88 wt%; the concentration of the pulp is preferably 20 - 50%, more preferably 20, 25, 30, 35, 40, 45 or 50%, and even more preferably 25, 30, 35 or 40%.

[0053] In the present invention, the high-calcium carbonate-mica-fluorite raw ore preferably comprises the following substances by mass percentage: CaF2≥30%, CaCO3≥15%, mica minerals≥30%. Further preferably, it comprises the following substances by mass percentage: CaF2≥35%, CaCO3≥20%, mica minerals≥35%. More preferably, it comprises the following substances by mass percentage: CaF2≥40%, CaCO3≥25%, mica minerals≥30%.

[0054] The mica minerals are preferably one or more of muscovite, sericite and phlogopite. Further preferably, they are muscovite or sericite. More preferably, they are muscovite.

[0055] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0056] Example 1

[0057] The present invention provides a two-stage short-process flotation process for high-calcium mica-type fluorite, which comprises the following steps:

[0058] The high-calcium carbonate-mica-fluorite raw ore is ground. The fineness of the ground raw ore with -200 mesh accounts for 85wt%. Water is added to form a pulp with a concentration of 20%. Then, through one rough selection and two fine selection processes (Fine Selection I and Fine Selection II) in the first-stage inhibition process, the removal rate of mica gangue in the obtained fluorite minerals reaches 80%. Then, through three fine selection processes (Fine Selection III, Fine Selection IV and Fine Selection V) in the second-stage inhibition process, a fluorite concentrate with a calcium fluoride grade of 93% is finally obtained.

[0059] The specific process of the one rough selection is as follows:

[0060] 1500g / t of Na2CO3 is used to adjust the pH of the pulp to 10. Then, an inhibitor composed of 600g / t of water glass and 300g / t of dextrin and 400g / t of sodium oleate collector are added in sequence to obtain rough concentrate and rough tailings. The rough concentrate enters the Fine Selection I process, and the rough tailings are subjected to two scavenging processes (Scavenging I and Scavenging II).

[0061] The scavenged concentrate I obtained in the Scavenging I process enters the rough selection process for treatment, and the scavenged rough ore I obtained in the Scavenging I process enters the Scavenging II process for treatment.

[0062] The scavenged concentrate II obtained in the Scavenging II process enters the Scavenging I process for treatment, and the scavenged tailings II obtained in the Scavenging II process are tailings.

[0063] The specific process of the first stage of concentration is as follows: adding 200 g / t of dextrin as an inhibitor; the specific process of the second stage of concentration is as follows: adding 100 g / t of dextrin as an inhibitor;

[0064] The specific process of the third stage of concentration is as follows: adding an inhibitor composed of 200 g / t of dilute sulfuric acid and 100 g / t of tannic acid; the specific process of the fourth stage of concentration is as follows: adding an inhibitor composed of 100 g / t of dilute sulfuric acid and 50 g / t of tannic acid; the specific process of the fifth stage of concentration is as follows: adding an inhibitor composed of 50 g / t of dilute sulfuric acid and 25 g / t of tannic acid; the concentration of the dilute sulfuric acid is 20 wt%;

[0065] The tailings obtained in the first stage of concentration enter the roughing process; the tailings obtained in the second, third, fourth, and fifth stages of concentration respectively enter the corresponding previous stage of concentration; the concentrates obtained in the first, second, third, and fourth stages of concentration respectively enter the corresponding next stage of concentration; the concentrate obtained in the fifth stage of concentration is the fluorite concentrate.

[0066] Example 2

[0067] The present invention provides a two-stage short-process flotation process for high-calcium mica-type fluorite, comprising the following steps:

[0068] Grind the high-calcium carbonate-mica-fluorite raw ore, and the fineness of the raw ore after grinding, with a particle size of -200 mesh, accounts for 85 wt%. Add water to form a pulp with a concentration of 30%, and then through one roughing and two concentration processes in the first-stage inhibition process, namely the first stage of concentration and the second stage of concentration, the removal rate of mica gangue in the obtained fluorite minerals reaches 85%. Then, through three concentration processes in the second-stage inhibition process, namely the third stage of concentration, the fourth stage of concentration, and the fifth stage of concentration, a fluorite concentrate with a calcium fluoride grade of 95% is finally obtained.

[0069] The specific process of the one-time roughing is as follows:

[0070] Adjust the pH of the pulp to 9 with 1500 g / t of Na2CO3, then successively add an inhibitor composed of 800 g / t of water glass and 200 g / t of dextrin, and 500 g / t of sodium oleate collector to obtain rough concentrate and rough tailings; the rough concentrate enters the first stage of concentration process, and the rough tailings undergo two scavenging processes, namely scavenging I and scavenging II;

[0071] The scavenged concentrate I obtained in the scavenging I process enters the roughing process for treatment, and the scavenged rough ore I obtained in the scavenging I process enters the scavenging II process for treatment;

[0072] The scavenged concentrate II obtained in the scavenging II process enters the scavenging I process for treatment, and the scavenged tailings II obtained in the scavenging II process are the tailings.

[0073] The specific process of the first stage of beneficiation is as follows: adding 250 g / t of dextrin as an inhibitor; the specific process of the second stage of beneficiation is as follows: adding 150 g / t of dextrin as an inhibitor;

[0074] The specific process of the third stage of beneficiation is as follows: adding an inhibitor composed of 150 g / t of dilute sulfuric acid and 100 g / t of tannic acid; the specific process of the fourth stage of beneficiation is as follows: adding an inhibitor composed of 100 g / t of dilute sulfuric acid and 50 g / t of tannic acid; the specific process of the fifth stage of beneficiation is as follows: adding an inhibitor composed of 100 g / t of dilute sulfuric acid and 50 g / t of tannic acid; the concentration of the dilute sulfuric acid is 15 wt%;

[0075] The tailings obtained in the first stage of beneficiation enter the roughing process; the tailings obtained in the second, third, fourth, and fifth stages of beneficiation respectively enter the corresponding previous stage of beneficiation; the concentrates obtained in the first, second, third, and fourth stages of beneficiation respectively enter the corresponding next stage of beneficiation; the concentrate obtained in the fifth stage of beneficiation is the fluorite concentrate.

[0076] Example 3

[0077] The present invention provides a two-stage short-process flotation process for high-calcium mica-type fluorite, comprising the following steps:

[0078] The high-calcium carbonate-mica-fluorite raw ore is ground, and the fineness of the ground raw ore with -200 mesh accounts for 90 wt%. Water is added to form a pulp with a concentration of 20%. Then, through one roughing and two beneficiation processes (the first stage of beneficiation and the second stage of beneficiation) in the first-stage inhibition process, the removal rate of mica gangue in the obtained fluorite minerals reaches 82%. Then, through three beneficiation processes (the third stage of beneficiation, the fourth stage of beneficiation, and the fifth stage of beneficiation) in the second-stage inhibition process, a fluorite concentrate with a calcium fluoride grade of 94% is finally obtained.

[0079] The specific process of the one-time roughing is as follows:

[0080] Using 1000 g / t of Na2CO3 to adjust the pH of the pulp to 9, and then successively adding an inhibitor composed of 500 g / t of water glass and 250 g / t of dextrin, and 600 g / t of sodium oleate collector to obtain rough concentrate and rough tailings; the rough concentrate enters the first stage of beneficiation process, and the rough tailings undergo two scavenging processes (the first scavenging and the second scavenging);

[0081] The scavenged concentrate I obtained in the first scavenging process enters the roughing process for treatment, and the scavenged rough ore I obtained in the first scavenging process enters the second scavenging process for treatment;

[0082] The scavenged concentrate II obtained in the second scavenging process enters the first scavenging process for treatment, and the scavenged tailings II obtained in the second scavenging process are the tailings.

[0083] The specific process of the first-stage cleaning is as follows: adding 200 g / t of dextrin as an inhibitor; the specific process of the second-stage cleaning is as follows: adding 150 g / t of dextrin as an inhibitor;

[0084] The specific process of the third-stage cleaning is as follows: adding an inhibitor composed of 150 g / t of dilute sulfuric acid and 100 g / t of tannic acid; the specific process of the fourth-stage cleaning is as follows: adding an inhibitor composed of 100 g / t of dilute sulfuric acid and 75 g / t of tannic acid; the specific process of the fifth-stage cleaning is as follows: adding an inhibitor composed of 50 g / t of dilute sulfuric acid and 25 g / t of tannic acid; the concentration of the dilute sulfuric acid is 18 wt%;

[0085] The tailings obtained in the first-stage cleaning process enter the roughing process; the tailings obtained in the second-stage, third-stage, fourth-stage, and fifth-stage cleaning processes respectively enter the corresponding previous cleaning process; the concentrates obtained in the first-stage, second-stage, third-stage, and fourth-stage cleaning processes respectively enter the corresponding next cleaning process; the concentrate obtained in the fifth-stage cleaning process is the fluorite concentrate.

[0086] Example 4

[0087] The present invention provides a two-stage short-process flotation process for high-calcium mica-type fluorite, comprising the following steps:

[0088] Grind the high-calcium carbonate-mica-fluorite raw ore. After grinding, the fineness of the raw ore with a particle size of -200 mesh accounts for 80 wt%. Add water to form a pulp with a concentration of 20%. Then, through one roughing and two cleaning processes (the first-stage cleaning and the second-stage cleaning) in the first-stage inhibition process, the removal rate of mica gangue in the obtained fluorite minerals reaches 83%. Then, through three cleaning processes (the third-stage cleaning, the fourth-stage cleaning, and the fifth-stage cleaning) in the second-stage inhibition process, finally, a fluorite concentrate with a calcium fluoride grade of 96% is obtained.

[0089] The specific process of the one-time roughing is as follows:

[0090] Adjust the pH of the pulp to 9 with 1000 g / t of Na2CO3, then successively add an inhibitor composed of 600 g / t of water glass and 250 g / t of dextrin, and 650 g / t of sodium oleate as a collector to obtain a rough concentrate and rough tailings; the rough concentrate enters the first-stage cleaning process, and the rough tailings undergo two scavenging processes (the first scavenging and the second scavenging);

[0091] The scavenged concentrate I obtained in the first scavenging process enters the roughing process for treatment, and the scavenged rough ore I obtained in the first scavenging process enters the second scavenging process for treatment;

[0092] The scavenged concentrate II obtained in the second scavenging process enters the first scavenging process for treatment, and the scavenged tailings II obtained in the second scavenging process are the tailings.

[0093] The specific process of the first beneficiation is as follows: adding 250 g / t of dextrin as an inhibitor. The specific process of the second beneficiation is as follows: adding 100 g / t of dextrin as an inhibitor;

[0094] The specific process of the third beneficiation is as follows: adding an inhibitor composed of 150 g / t of dilute sulfuric acid and 50 g / t of tannic acid. The specific process of the fourth beneficiation is as follows: adding an inhibitor composed of 150 g / t of dilute sulfuric acid and 50 g / t of tannic acid. The specific process of the fifth beneficiation is as follows: adding an inhibitor composed of 100 g / t of dilute sulfuric acid and 25 g / t of tannic acid; the concentration of the dilute sulfuric acid is 12 wt%;

[0095] The tailings obtained in the first beneficiation process enter the roughing process. The tailings obtained in the second, third, fourth, and fifth beneficiation processes respectively enter the corresponding previous beneficiation process. The concentrates obtained in the first, second, third, and fourth beneficiation processes respectively enter the corresponding next beneficiation process. The concentrate obtained in the fifth beneficiation process is fluorite concentrate.

[0096] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A high-calcium mica-type fluorite two-stage short-process flotation process, characterized in that, It includes the following steps: The high-calcium carbonate-mica-fluorite raw ore is ground and then water is added to form a pulp, which then undergoes a primary inhibition process and a secondary inhibition process, and finally fluorite concentrate is obtained; The primary inhibition process includes one rough selection and two cleaning processes, and the two cleaning processes are cleaning I and cleaning II; The specific process of the one rough selection is as follows: Na2CO3 is used to adjust the pH of the pulp, and then an inhibitor composed of water glass and dextrin and a collector are successively added to float fluorite, obtaining rough concentrate and rough tailings; the rough concentrate enters the cleaning I process; The specific processes of cleaning I and cleaning II are independently: adding the inhibitor dextrin; The secondary inhibition process includes three cleaning processes, and the three cleaning processes are cleaning III, cleaning IV, and cleaning V; The specific processes of cleaning III, cleaning IV, and cleaning V are independently: adding an inhibitor composed of dilute sulfuric acid and tannic acid; In the one rough selection process, the dosage of Na2CO3 is 500 - 1500 g / t, the pH of the pulp is adjusted to 9 - 10, the dosage of water glass is 500 - 800 g / t, and the dosage of dextrin is 200 - 300 g / t; The total dosage of the inhibitor dextrin added in the cleaning I and cleaning II processes is 200 - 400 g / t; In the cleaning III, cleaning IV, and cleaning V processes, the total amount of dilute sulfuric acid added is 300 - 500 g / t, and the total amount of tannic acid added is 100 - 200 g / t; The high-calcium carbonate-mica-fluorite raw ore, by mass percentage, includes the following substances: CaF2 ≥ 30%, CaCO3 ≥ 15%, mica minerals ≥ 30%; The mica minerals are one or several of muscovite, sericite, and phlogopite.

2. The high-calcium mica-type fluorite two-stage short-process flotation process according to claim 1, characterized in that, The rough tailings obtained in the one rough selection process undergo two scavenging processes; The two scavenging processes are scavenging I and scavenging II; The scavenged concentrate I obtained in the scavenging I process enters the rough selection process for treatment, and the scavenged rough ore I obtained in the scavenging I process enters the scavenging II process for treatment; The scavenged concentrate II obtained in the scavenging II process enters the scavenging I process for treatment, and the scavenged tailings II obtained in the scavenging II process are tailings.

3. The high-calcium mica-type fluorite two-stage short-process flotation process according to claim 1 or 2, characterized in that, The tailings obtained in the cleaning I process enter the rough selection process, the tailings obtained in the cleaning II, III, IV, and V processes respectively enter the corresponding previous cleaning process, the concentrates obtained in the cleaning I, II, III, and IV processes respectively enter the corresponding next cleaning process, and the concentrate obtained in the cleaning V process is fluorite concentrate.

4. The high-calcium mica-type fluorite two-stage short-process flotation process according to claim 3, characterized in that, In the one rough selection process, the collector is saponified oleic acid, and the dosage of the saponified oleic acid is 400 - 800 g / t.

5. The high-calcium mica-type fluorite two-stage short-process flotation process according to claim 1 or 4, characterized in that, The proportion of the ground raw ore with a fineness of -200 mesh is 80 - 90 wt%, and the concentration of the pulp is 20 - 50%.

Images