阅读说明：本技术 海滨钛锆砂中回收独居石的选矿方法 (Beneficiation method for recovering monazite from seaside titanium zircon sand ) 是由 李吕华 谭健锋 李爵飞 肖先富 王祥丁 刘永雄 黄翔 李健 梁亚松 阮春华 于 2021-09-01 设计创作，主要内容包括：本发明公开一种海滨钛锆砂中回收独居石的选矿方法,包括将海滨钛锆砂进行第一湿式磁选,将所述第一非磁矿进行第二湿式磁选,将所述第二导磁矿加入所述第一导磁矿并进行第三湿式磁选,将所述第三非磁矿进行烘矿后进行第一干式磁选,将所述第四非磁矿进行第二干式磁选,以获得独居石精矿。通过将海滨钛锆砂经过第二道湿式磁选进行复选,回收第一非磁矿中的第二导磁矿,经第一干式磁选分离出导磁矿物后得到的非磁矿物再经第二干式磁选进一步提纯,分离排除可能夹带的非磁矿物而得到独居石精矿,以上各步骤最终提高了所得到的独居石精矿中独居石的质量百分比,避免了湿选、干选交替选矿过程的出现,节约了能源,同时避免水体污染等问题。(The invention discloses a beneficiation method for recovering monazite from seashore titanium zircon sand, which comprises the steps of carrying out first wet magnetic separation on seashore titanium zircon sand, carrying out second wet magnetic separation on first non-magnetic ore, adding second magnetic ore into the first magnetic ore, carrying out third wet magnetic separation, drying the third non-magnetic ore, carrying out first dry magnetic separation on the third non-magnetic ore, and carrying out second dry magnetic separation on the fourth non-magnetic ore to obtain monazite concentrate. The seashore titanium zirconium sand is subjected to secondary wet magnetic separation to recover second magnetic conduction ore in the first non-magnetic ore, the non-magnetic ore obtained after magnetic conduction ore is separated through first dry magnetic separation is further purified through second dry magnetic separation, and the separated non-magnetic ore possibly carried along is removed to obtain monazite concentrate.)

1. The beneficiation method for recovering monazite from seaside titanium zircon sand is characterized by comprising the following steps of:

carrying out first wet magnetic separation on seashore titanium zircon sand to separate first magnetic conduction ores and first non-magnetic ores;

carrying out second wet magnetic separation on the first non-magnetic ore to separate a second magnetic conduction ore and a second non-magnetic ore;

adding the second magnetic conduction ore into the first magnetic conduction ore and carrying out third wet magnetic separation, wherein the magnetic field intensity of the third wet magnetic separation is smaller than that of the first wet magnetic separation and the second wet magnetic separation so as to separate a third magnetic conduction ore and a third non-magnetic ore;

drying the third non-magnetic ore and then carrying out first dry magnetic separation to separate a fourth non-magnetic ore;

and carrying out second dry magnetic separation on the fourth nonmagnetic ores to obtain monazite concentrates.

2. The beneficiation method for recovering monazite from seashore titanium zircon sand according to claim 1, wherein the step of subjecting the third nonmagnetic ore to the first dry magnetic separation after the ore baking to separate out a fourth nonmagnetic ore comprises:

drying the third magnetic conduction ore and then carrying out third dry magnetic separation to obtain a fifth non-magnetic ore;

adding the fifth non-magnetic ore into the third non-magnetic ore after ore drying and before first dry magnetic separation;

and carrying out the second dry magnetic separation on the fifth non-magnetic ore and the third non-magnetic ore to obtain monazite concentrate.

3. The beneficiation process for monazite recovery from seashore titanium zircon sand according to claim 2, wherein the second dry magnetic separation comprises at least two first sub-magnetic separation steps performed sequentially.

4. 4-beneficiation process according to claim 3, for the recovery of monazite from seashore titanium zircon sand, characterized in that in the at least two subsequent first sub-magnetic separation steps, the non-magnetic minerals resulting from the first sub-magnetic separation carried out first are collected in order to obtain minerals containing zirconite and/or rutile.

5. The beneficiation method for recovering monazite from seashore titanozrite according to claim 3, wherein the step of subjecting the fourth non-magnetic ore to a second dry magnetic separation to obtain monazite concentrate comprises the steps of:

and carrying out the second dry magnetic separation on the fourth nonmagnetic ores to obtain nonmagnetic minerals, and carrying out the second dry magnetic separation at least once.

6. The beneficiation process for recovering monazite from seashore titanium zircon sand according to claim 3, wherein the magnetic field strength of the third dry magnetic separation is less than the magnetic field strength of the first dry magnetic separation.

7. The beneficiation method for recovering monazite from seashore titanium zircon sand according to claim 6, wherein the magnetic field strength of the first dry magnetic separation is less than the magnetic field strength of the first sub magnetic separation.

8. The beneficiation method for recovering monazite from seashore titanium zircon sand according to claim 7, wherein the magnetic field strength of the first wet magnetic separation and the second wet magnetic separation are both 13000Gs, and the magnetic field strength of the third wet magnetic separation is 4000 Gs; the magnetic field intensity of the first dry-type magnetic separation is 6000-8000 Gs, the magnetic field intensity of the first sub-magnetic separation is 9000-10000 Gs, and the magnetic field intensity of the third dry-type magnetic separation is 4000 Gs.

9. The beneficiation method for recovering monazite from seashore titanium zircon sand according to claim 1, wherein the mass percentage of monazite in the seashore titanium zircon sand is 0.2 to 4%.

10. The beneficiation process to recover monazite from seashore titanium zircon sand according to claim 1, further comprising the steps of: and (c) performing gravity separation on the second non-magnetic ore by using a shaking table device to obtain a mineral containing zirconite and/or rutile.

Technical Field

The invention relates to the technical field of beneficiation, in particular to a beneficiation method for recovering monazite from seashore titanium zircon sand.

Background

Because of seaside titanium zirconium rough sand mineralization, minerals such as zircon sand, rutile, ilmenite and monazite are generally associated with the seaside titanium zirconium rough sand mineralization. During the process of separating and enriching the zircon sand and the rutile, a small amount of monazite in the coarse sand is also enriched, and the content of the monazite in the seashore titanium zirconium coarse sand is generally between 1 and 3 percent. During traditional titanium-zirconium ore dressing, because monazite has radioactivity and low content, the monazite is heavier than the purification and separation of zircon sand, rutile and ilmenite with high content, and the monazite is dispersed in various products or tailings and is not separately recovered. Since monazite belongs to one of rare metal ores with higher value, rare earth minerals are lost, the quality of products such as zircon sand, rutile, ilmenite and the like is influenced to a certain extent, and the environmental radiation control around stockpiling is influenced.

At present, enrichment is generally carried out by a shaking table along with zirconite in China, and then further enrichment is carried out by magnetic separation, electric separation and strong magnetic separation; or carrying out mixed flotation on monazite and zirconite in an alkaline ore pulp medium (pH 8-10), and then carrying out magnetic separation and electric separation; or adopts the method of floating zircon in strong acid pulp medium (PH <3) to inhibit monazite and ilmenite. The separation indexes of the separation methods are not ideal, the product grade is low, the recovery rate is low, and the problems of equipment corrosion and environmental protection treatment in the flotation process are difficult to popularize or apply in a large scale. Valuable resources are seriously lost, and meanwhile, the environment is also badly influenced; for the existing monazite recovery technology with low content, high value and radioactivity in the seashore titanium zircon ore, the single magnetic separation recovery rate is low, the table reselection efficiency is low, and the environmental pollution of the flotation water body is great; by adopting the magnetic separation-gravity separation-magnetic separation-electric separation-flotation combined mineral separation process, the monazite recovery process is complex and non-centralized, and has the problems of low yield, low efficiency, high energy consumption, easy water environment pollution caused by the flotation process and the like. Therefore, an efficient and environment-friendly beneficiation method for recovering monazite from seaside titanium zirconium coarse sand is urgently needed to improve the mass percentage of the recovered monazite.

Disclosure of Invention

The invention mainly aims to provide a beneficiation method for recovering monazite from seashore titanium zirconium sand, and aims to improve the mass percentage of monazite in monazite concentrate obtained by beneficiation of seashore titanium zirconium sand.

In order to achieve the purpose, the beneficiation method for recovering monazite from seashore titanium zircon sand provided by the invention comprises the following steps: carrying out first wet magnetic separation on seashore titanium zircon sand to separate first magnetic conduction ores and first non-magnetic ores; carrying out second wet magnetic separation on the first non-magnetic ore to separate a second magnetic conduction ore and a second non-magnetic ore; adding the second magnetic conduction ore into the first magnetic conduction ore and carrying out third wet magnetic separation, wherein the magnetic field intensity of the third wet magnetic separation is smaller than that of the first wet magnetic separation and the second wet magnetic separation so as to separate a third magnetic conduction ore and a third non-magnetic ore; drying the third non-magnetic ore and then carrying out first dry magnetic separation to separate a fourth non-magnetic ore; and carrying out second dry magnetic separation on the fourth nonmagnetic ores to obtain monazite concentrates.

Optionally, the step of performing a first dry magnetic separation on the third nonmagnetic ores after the ore drying to separate fourth nonmagnetic ores includes: drying the third magnetic conduction ore and then carrying out third dry magnetic separation to obtain a fifth non-magnetic ore; adding the fifth non-magnetic ore into the third non-magnetic ore after ore drying and before first dry magnetic separation; and carrying out the second dry magnetic separation on the fifth non-magnetic ore and the third non-magnetic ore to obtain monazite concentrate. And the third magnetic conduction ore is subjected to third dry magnetic separation, so that fifth non-magnetic ore can be selected and added into third non-minerals, and the mass percentage of monazite in the monazite concentrate can be further improved.

Optionally, the second dry magnetic separation comprises at least two first sub-magnetic separation steps performed sequentially. Through setting the second dry-type magnetic separation into at least two first magnetic separation steps which are carried out successively, a reaction interval in time is provided for the target minerals in the second dry-type magnetic separation, the beneficiation efficiency of the second dry-type magnetic separation is improved, and the mass percentage of monazite in the monazite concentrate is further improved.

Optionally, in the at least two first sub-magnetic separation steps performed successively, the non-magnetic minerals resulting from the first sub-magnetic separation performed first are collected to obtain the zircon-and/or rutile-containing minerals. By collecting the nonmagnetic minerals obtained by the first sub-magnetic separation which is carried out firstly, the efficiency of recovering the minerals containing the zirconite and/or the rutile is improved, and the utilization rate of the seashore titanium zircon sand is improved.

Optionally, the step of subjecting the fourth non-magnetic ore to a second dry magnetic separation to obtain monazite concentrate includes the steps of: and carrying out the second dry magnetic separation on the fourth nonmagnetic ores to obtain nonmagnetic minerals, and carrying out the second dry magnetic separation at least once. And performing at least one second dry magnetic separation on the non-magnetic-conductive minerals obtained after the fourth non-magnetic minerals are subjected to the second dry magnetic separation, further recovering monazite in the non-magnetic-conductive minerals, and further improving the mass percentage of monazite in monazite concentrate obtained by the beneficiation method for recovering monazite from seashore titanium zircon sand.

Optionally, the magnetic field intensity of the third dry magnetic separation is smaller than that of the first dry magnetic separation, so that the efficiency of the third dry magnetic separation for separating the fifth nonmagnetic ore containing monazite is improved.

Optionally, the magnetic field strength of the first dry magnetic separation is smaller than that of the first sub magnetic separation, so that the mass percentage of monazite in monazite concentrate obtained by the monazite recovery beneficiation method from seashore titanium zircon sand is further increased.

Optionally, the magnetic field strength of the first wet magnetic separation and the second wet magnetic separation is 13000Gs, and the magnetic field strength of the third wet magnetic separation is 4000 Gs; the magnetic field intensity of the first dry-type magnetic separation is 6000-8000 Gs, the magnetic field intensity of the first sub-magnetic separation is 9000-10000 Gs, and the magnetic field intensity of the third dry-type magnetic separation is 4000 Gs.

Optionally, the mass percentage of monazite in the seashore titanium zircon sand is 0.2% to 4%. The mass percent of monazite in the seashore titanium zircon sand is 0.2-4%, and the mass percent of monazite in monazite concentrate obtained by the beneficiation method for recovering the monazite from the seashore titanium zircon sand is higher.

Optionally, the beneficiation method for recovering monazite from seashore titanium zircon sand further comprises the following steps: and (3) reselecting the second nonmagnetic ore by adopting shaking table equipment to obtain a mineral containing zirconite and/or rutile, so that the utilization rate of the seashore zirconium-titanium sand by the beneficiation method for recovering monazite from the seashore titanium-zirconium sand is improved.

According to the technical scheme, the first nonmagnetic ores are subjected to secondary wet magnetic separation through the seashore titanium zirconium sand, the second magnetic conduction ores in the first nonmagnetic ores are further recovered, the first magnetic conduction ores and the second magnetic conduction ores obtained through the secondary wet magnetic separation are subjected to third wet magnetic separation, and the third nonmagnetic ores and the third magnetic conduction ores with larger proportion are separated; and after the third non-magnetic ore is dried, separating out magnetic conductive minerals through the first dry magnetic separation, further purifying the obtained non-magnetic ores through the second dry magnetic separation, and separating and removing the non-magnetic minerals possibly carried by the non-magnetic ores to obtain monazite concentrate. In addition, by adopting the mode of wet magnetic separation beneficiation enrichment and dry magnetic separation beneficiation purification, the alternate beneficiation process of wet separation and dry separation is avoided, the energy is saved, and the problems of water pollution, environmental protection, high treatment cost and the like caused by the beneficiation process are avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic view of the steps of an embodiment of the beneficiation method for recovering monazite from seashore titanium zircon sand according to the present invention.

FIG. 2 is a schematic flow chart of another embodiment of the beneficiation method for recovering monazite from seashore titanium zircon sand according to the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" and/or "appears throughout, the meaning includes three parallel schemes, for example," A and/or B "includes scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a beneficiation method for recovering monazite from seashore titanium zircon sand. Referring to fig. 1, in an embodiment of the present invention, the beneficiation method for recovering monazite from seashore titanium zircon sand includes the following steps: carrying out first wet magnetic separation on seashore titanium zircon sand to separate first magnetic conduction ores and first non-magnetic ores; carrying out second wet magnetic separation on the first non-magnetic ore to separate a second magnetic conduction ore and a second non-magnetic ore; adding the second magnetic conduction ore into the first magnetic conduction ore and carrying out third wet magnetic separation, wherein the magnetic field intensity of the third wet magnetic separation is smaller than that of the first wet magnetic separation and the second wet magnetic separation so as to separate out third magnetic conduction ore and third non-magnetic ore; drying the third non-magnetic ore and then carrying out first dry magnetic separation to separate out a fourth non-magnetic ore; and carrying out second dry magnetic separation on the fourth nonmagnetic ores to obtain monazite concentrate. In the embodiment, the first nonmagnetic ores are subjected to the second wet magnetic separation by using the seashore titanium zirconium sand, the second magnetic conduction ores in the first nonmagnetic ores are further recovered, and the first magnetic conduction ores and the second magnetic conduction ores obtained by the first magnetic conduction ores and the second magnetic conduction ores are subjected to the third wet magnetic separation to separate the third nonmagnetic ores and the third magnetic conduction ores with larger proportion; and after the third non-magnetic ore is dried, separating out magnetic conductive minerals through the first dry magnetic separation, further purifying the obtained non-magnetic ores through the second dry magnetic separation, and separating and removing the non-magnetic minerals possibly carried by the non-magnetic ores to obtain monazite concentrate. In addition, by adopting the mode of wet magnetic separation beneficiation enrichment and dry magnetic separation beneficiation purification, the alternate beneficiation process of wet separation and dry separation is avoided, the energy is saved, and the problems of water pollution, environmental protection, high treatment cost and the like caused by the beneficiation process are avoided. In addition, the magnetic conductive ores in the seashore titanium zircon sand are concentrated, enriched and separated from beginning, and the recovery and purification of the subsequent valuable minerals are facilitated.

As a further preferred embodiment, as shown in fig. 2, the beneficiation method for recovering monazite from seashore titanium zircon sand comprises the following steps: carrying out first wet magnetic separation on the seashore titanium zircon sand with the magnetic field intensity of 13000Gs so as to separate out first magnetic ore (mainly ilmenite) and first non-magnetic ore. It should be noted that the non-magnetic ore is a relative magnetic conductive ore, that is, a non-magnetic ore, and the magnetic conductive ore and the non-magnetic ore are divided according to different magnetic field strengths, and some substances are magnetized after reaching a certain magnetic field strength. Gauss (Gs, G) is a unit of magnetic field strength commonly used in the field of mineral separation, but is not an international unit of magnetic induction, gauss is a very small unit, and 10000Gs is 1T (international unit of general use). Carrying out second wet magnetic separation on the first non-magnetic ore with the magnetic field intensity of 13000Gs, checking the first non-magnetic ore to separate a second magnetic conduction ore and a second non-magnetic ore, and further recovering the second magnetic conduction ore; adding the second magnetic conduction ore into the first magnetic conduction ore and carrying out third wet magnetic separation with the magnetic field intensity of 4000Gs so as to separate out a third magnetic conduction ore (mainly ilmenite with a large proportion) and a third non-magnetic ore (namely medium and weak magnetic ore); drying the third non-magnetic ore, and then carrying out first dry magnetic separation with the magnetic field intensity of 6000Gs to 8000Gs, namely carrying out higher magnetic separation, discharging fourth magnetic-guiding ore mainly comprising tourmaline, garnet and the like, and separating fourth non-magnetic ore, namely monazite rough concentrate; and carrying out second dry magnetic separation on the fourth nonmagnetic ores to obtain monazite concentrate. The first wet magnetic separation, the second wet magnetic separation and the third wet magnetic separation can be performed by a wet magnetic separator. The wet magnetic separator is a magnetic separator which relies on water as a medium in the mineral separation process, and is divided into a weak magnetic wet magnetic separator, a medium magnetic wet magnetic separator, a strong magnetic wet magnetic separator and the like, and can be divided into a permanent magnetic wet magnetic separator, an electromagnetic wet magnetic separator and the like according to types.

Specifically, the step of performing the first dry magnetic separation after the drying of the third nonmagnetic ore to separate the fourth nonmagnetic ore comprises: drying the third magnetic conduction ore, and then carrying out third dry magnetic separation with the magnetic field intensity of 4000Gs to obtain a fifth non-magnetic ore so as to further purify the fifth non-magnetic ore containing monazite; adding the fifth non-magnetic ore into the third non-magnetic ore after the ore drying and before the first dry magnetic separation; and carrying out second dry magnetic separation on the fifth non-magnetic ore and the third non-magnetic ore to obtain monazite concentrate. And the third magnetic conduction ore is subjected to third dry magnetic separation, so that fifth non-magnetic ore can be selected and added into third non-minerals, and the mass percentage of monazite in the monazite concentrate can be further improved.

The second dry-type magnetic separation comprises at least two first sub-magnetic separation steps which are carried out successively, and the at least two sub-magnetic separations are dry-type magnetic separations with the magnetic field intensity of 9000-1000 Gs. Through setting the second dry-type magnetic separation into at least two first magnetic separation steps which are carried out successively, a reaction interval in time is provided for the target minerals in the second dry-type magnetic separation, the beneficiation efficiency of the second dry-type magnetic separation is improved, and the mass percentage of monazite in the monazite concentrate is further improved. The first sub-magnetic separation and the third dry-type magnetic separation included in the first dry-type magnetic separation and the second dry-type magnetic separation can be performed by a dry-type magnetic separator, the forms of the magnetic separation operation of the dry-type magnetic separation and the wet-type magnetic separation are different, and water or other media are not needed in the dry-type magnetic separation operation.

The step of subjecting the fourth non-magnetic ore to a second dry magnetic separation to obtain monazite concentrate, comprising the steps of: and carrying out second dry magnetic separation on the fourth nonmagnetic ores to obtain nonmagnetic minerals, and carrying out the second dry magnetic separation at least once. In the present example, the second dry magnetic separation was performed once again on the non-magnetic conductive ore containing monazite obtained after the first dry magnetic separation as shown in fig. 2, that is, the dry magnetic separation was performed twice in total, and the total of the first sub-magnetic separation was four or more times. And performing at least one second dry magnetic separation on the non-magnetic minerals obtained after the fourth non-magnetic minerals are subjected to the second dry magnetic separation, further recovering monazite in the non-magnetic minerals, and further improving the mass percentage and recovery rate of monazite in monazite concentrate obtained by the beneficiation method for recovering monazite from seashore titanium zircon sand.

In at least two first sub-magnetic separation steps which are sequentially carried out, non-magnetic minerals obtained by the first sub-magnetic separation are collected to obtain minerals containing zirconite and rutile, and middlings containing zirconite and rutile and having higher grades are obtained in the steps. Through collecting the nonmagnetic mineral that first sub-magnetic separation that carries on at first obtained, improved the efficiency of retrieving the mineral that contains zirconite, rutile, improved the utilization ratio of seashore titanium zircon sand.

The magnetic field intensity of the third dry-type magnetic separation is smaller than that of the first dry-type magnetic separation, so that the efficiency of the third dry-type magnetic separation for separating the fifth nonmagnetic ore containing monazite is improved. The magnetic field intensity of the first dry magnetic separation is smaller than that of the first sub magnetic separation, and the mass percentage of monazite in monazite concentrate obtained by the beneficiation method for recovering monazite from seashore titanium zircon sand is further improved.

In a further preferred embodiment, the magnetic field strength of the third wet magnetic separation is less than the magnetic field strength of the first wet magnetic separation and the second wet magnetic separation; the magnetic field intensity of the third dry magnetic separation is equal to that of the third wet magnetic separation, the magnetic field intensity of the third dry magnetic separation is smaller than that of the first dry magnetic separation, and the magnetic field intensity of the first dry magnetic separation is smaller than that of the second dry magnetic separation, namely the magnetic field intensity of the first dry magnetic separation is smaller than that of the first sub magnetic separation. Compared with the third wet magnetic separation, the first wet magnetic separation and the second wet magnetic separation which have higher magnetic field strength can separate weak magnetic monazite which is not easy to magnetize from most of impurities which are easy to magnetize, so that the subsequent screening efficiency is improved; then, through a third wet magnetic separation with lower magnetic field intensity compared with the first wet magnetic separation and the second wet magnetic separation, the obtained nonmagnetic minerals comprise weak magnetic monazite which is not easy to be magnetized; then, the obtained nonmagnetic minerals contain weak magnetic monazite which is not easy to be magnetized by the first dry magnetic separation which has larger magnetic field intensity compared with the third dry magnetic separation and the third wet magnetic separation; and finally magnetizing and screening weak magnetic monazite through second dry magnetic separation with higher magnetic field intensity relative to the first dry magnetic separation to obtain monazite concentrate, so that the recovery efficiency of the beneficiation method for recovering the monazite from the seashore titanium zircon sand is integrally improved.

Specifically, the magnetic field strengths of the wet magnetic separation and the dry magnetic separation are summarized as follows: the magnetic field intensity of the first wet magnetic separation is equal to that of the second wet magnetic separation, the magnetic field intensities of the first wet magnetic separation and the second wet magnetic separation are both 13000Gs, and the magnetic field intensity of the third wet magnetic separation is 4000 Gs; the magnetic field intensity of the first dry-type magnetic separation is 6000 to 8000Gs, the magnetic field intensity of the first sub-magnetic separation is 9000 to 10000Gs, the magnetic field intensity of the third dry-type magnetic separation is 4000Gs, a reasonable magnetic field intensity boundary is set, and the recovery efficiency of the ore dressing method for recovering monazite from the seashore titanium zircon sand is improved.

The mass percentage of the monazite in the seashore titanium zircon sand is 0.2 to 4 percent, namely the monazite grade in the seashore titanium zircon sand is 0.2 to 4 percent. Grade refers to the content of useful components or useful minerals in the ore (or beneficiation product). Grade is the main quality index of ores and mineral separation products, and directly affects mineral separation efficiency. Most mineral products are expressed in mass percent (%) as useful components (elements or compounds) or useful mineral content. The mass percent of monazite in the seashore titanium zircon sand is 0.2-4%, and the mass percent of monazite in monazite concentrate obtained by the beneficiation method for recovering the monazite from the seashore titanium zircon sand is higher.

In this example, the change of the mass percentage of monazite in the monazite concentrate after the seashore titanium zircon sand passes through each stage of the beneficiation method for recovering monazite from seashore titanium zircon sand is shown in table 1 below.

TABLE 1 results of mass percent of monazite in each stage of monazite mine

Researchers in the application find that the monazite concentrate obtained by the ore dressing method for recovering the monazite from the seashore titanium-zirconium sand shown in table 1 has the monazite concentrate grade of 61-67% at last, wherein the mass percentage of the monazite is 0.2-4%.

The beneficiation method for recovering monazite from seaside titanium zircon sand further comprises the following steps: and (3) reselecting the second nonmagnetic ore by adopting table concentrator equipment to obtain a mineral containing zirconite and rutile, wherein the mineral obtained in the step is mainly a coarse concentrate containing zirconite and rutile and having higher grade, and the recovery rate of valuable minerals in the seashore zirconium-titanium sand by the beneficiation method for recovering monazite from the seashore titanium-zirconium sand is improved.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.