CN112246426A - Chromite beneficiation method - Google Patents
Chromite beneficiation method Download PDFInfo
- Publication number
- CN112246426A CN112246426A CN201910658417.XA CN201910658417A CN112246426A CN 112246426 A CN112246426 A CN 112246426A CN 201910658417 A CN201910658417 A CN 201910658417A CN 112246426 A CN112246426 A CN 112246426A
- Authority
- CN
- China
- Prior art keywords
- chromium
- ore pulp
- chromite
- ore
- magnetic iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The application discloses a chromite beneficiation method; the method comprises the following steps: and (3) weak magnetic iron removal: introducing the original ore pulp into weak magnetic iron removal equipment to primarily remove strong magnetic iron to obtain primary ore pulp; strong magnetic enrichment: and introducing the primary ore pulp into strong magnetic mineral separation equipment to obtain the chromium fine powder. According to the technical scheme, by the aid of the ore dressing process combining weak magnetic iron removal and strong magnetic enrichment, the weak magnetic iron removal can remarkably reduce the content of iron, improve the proportion of ferrochrome in chromium fine powder, improve the grade of the chromium fine powder and improve the market value of the chromium fine powder; the scheme is used for recovering the chromium tailings, does not add a chemical beneficiation agent, has little pollution to the environment and has higher economic value.
Description
Technical Field
The disclosure generally relates to the technical field of ore dressing, and particularly relates to an ore dressing method for chromite.
Background
Chromium is an important metal in modern industry, has extremely wide application range, and is mainly used in the fields of metallurgy, refractory materials, chemical industry and the like. In the metallurgical industry, chromite is mainly used for producing ferrochrome and chromium metal, in the refractory industry, chromite is used for manufacturing chrome bricks, chrome magnesia bricks and other special refractory materials, and in the chemical industry, chromite is mainly used for producing sodium dichromate and further preparing other chromium compounds.
At present, the existing mineral dressing process for chromium ore at home and abroad mainly adopts single gravity separation, single magnetic separation, or gravity-magnetic combined mineral dressing and the like, and the processes produce chromium oreCr in coming fine chromium powder2O3The content of the (C) is only about 40%, and the increase of the content requires high cost or wastes a lot of raw materials.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it would be desirable to provide a method for significantly increasing the Cr content of chromium concentrate2O3The content of the chromium in the chromium tailings can be effectively recovered.
In a first aspect, the present application provides a chromite beneficiation process, said process comprising the steps of:
and (3) weak magnetic iron removal: introducing the original ore pulp into weak magnetic iron removal equipment to primarily remove strong magnetic iron to obtain primary ore pulp;
strong magnetic enrichment: and introducing the primary ore pulp into strong magnetic mineral separation equipment to obtain the chromium fine powder.
According to the technical scheme provided by the embodiment of the application, the original ore pulp is the waste chromium tailings; still include before the weak magnetism deironing: and (3) mixing the waste chromium tailings until the ratio of the mine water is 30%.
According to the technical scheme provided by the embodiment of the application, the original ore pulp is obtained by the following method:
the raw ore is crushed by a crusher to obtain coarse ore with the granularity of about 20-25 mm;
and grinding the coarse ore to a first set mesh number by a ball grinding machine to obtain the original ore pulp.
According to the technical scheme provided by the embodiment of the application, the original ore pulp is obtained by the following method:
screening the chromium coarse powder and the chromium middling through a high-frequency vibrating screen to obtain original ore pulp with the mesh number smaller than a first set mesh number and intermediate ore powder with the mesh number larger than the first set mesh number;
and grinding the intermediate mineral powder to a first set mesh number by a ball grinder to obtain the original ore pulp.
According to the technical scheme provided by the embodiment of the application, the range of the first set number is 40-50 meshes.
According to the technical scheme provided by the embodiment of the application, the magnetic field intensity range of the weak magnetic iron removal equipment is 800Gs-1200 Gs; the magnetic field intensity range of the beneficiation equipment is 10000Gs-16000 Gs.
According to the technical scheme, by the aid of the ore dressing process combining weak magnetic iron removal and strong magnetic enrichment, the weak magnetic iron removal can remarkably reduce the content of iron in the chromium fine powder, the proportion of ferrochrome in the chromium fine powder is improved, the proportion of ferrochrome in the chromium fine powder is required to be more than 1.9 in mineral smelting, the proportion of ferrochrome in the chromium fine powder can be increased to be more than 4.0, the market value of the chromium fine powder is improved, the scheme can be used for secondary ore dressing recovery of chromium tailings, secondary resource recovery of waste chromium tailings is carried out, and compared with an ore dressing process of gravity separation, the ore dressing process is simple in process, low in cost and capable of obtaining high-yield production requirements; the method is used for recovering the chromium tailings, does not add a chemical beneficiation agent, has little pollution to the environment and has higher economic value. The technical scheme of this application still can be used to the raw ore beneficiation of chromium ore, and the concentration of the ore concentrate that obtains after carrying out the ore dressing to the raw ore through the technical scheme of this application is greater than 40%, has improved the economic value of chromium concentrate powder, and under the prerequisite of the same chromium content, the total weight reduces, has reduced the cost of transportation on ton level transportation in other words, more environmental protection. The technical scheme of the application can also be used for mineral separation of the chromium coarse powder and the chromium middling, so that the chromium fine powder with the taste (chromium content) more than or equal to 50% can be obtained, and the economic value of the chromium fine powder is improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a flow chart of a first embodiment of the present application;
FIG. 2 is a flow chart of a second embodiment of the present application;
fig. 3 is a flowchart of a third embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Please refer to fig. 1, which is a flow chart of a chromite beneficiation method according to a first embodiment of the present application: the method comprises the following steps:
and s11, mixing the waste chromium tailings until the proportion of the ore water is 30% to obtain the original ore pulp. The waste chromium tailings are produced by a general beneficiation method, for example, the waste chromium tailings are produced by gravity separation, 40-mesh ore pulp is subjected to gravity separation to obtain chromium fine powder and chromium tailings, the content of chromium in the chromium tailings is 8% -15%, the chromium tailings in the prior art are directly discarded, and the waste is great waste of resources.
s12, weak magnetic iron removal: introducing the original ore pulp into weak magnetic iron removal equipment to primarily remove strong magnetic iron to obtain primary ore pulp; the magnetic field intensity of the weak magnetic iron removing equipment is selected to be 800Gs-1200Gs, and the magnetic field intensity of the iron removing equipment can be determined according to the magnetic field characteristic of iron contained in the ore; after the original ore pulp passes through the weak magnetic iron removal equipment, the separated iron with stronger magnetism can be preliminarily removed, and experiments show that the iron content in the chromium refined powder can be reduced by about 40 percent.
s13, strong magnetic enrichment: and introducing the primary ore pulp into strong magnetic mineral separation equipment to obtain the chromium fine powder. The magnetic field intensity of the strong magnetic separation equipment ranges from 10000Gs to 16000Gs, and the equipment can be a flat-plate magnetic separator for example. After the primary ore pulp passes through the strong magnetic separation equipment, the substances with weak magnetism, such as chromium, iron and the like, are enriched to form chromium fine powder. The other components will form the chromium tailings. In this example, the content of the obtained chromium concentrate was 43%.
The method is used for secondary beneficiation recovery of the chromium tailings, and carries out secondary resource recovery on the waste chromium tailings, and compared with a gravity separation beneficiation process, the method is simple in process and low in cost, and can meet the production requirement of high yield; the scheme is used for recovering the chromium tailings, does not add a chemical beneficiation agent, has little pollution to the environment and has higher economic value.
Example two:
as shown in fig. 2, the flow chart of the beneficiation method provided by this embodiment includes the following steps:
s21, passing the raw ore through a crusher to obtain coarse ore with granularity of about 20-25 mm.
And s22, grinding the coarse ore to a first set mesh number by a ball grinder to obtain the original ore pulp. In this example, the first set number is 40 mesh to 50 mesh, i.e. the diameter of the ore particles ranges from 0.425mm to 0.355mm, and the coarse ore is substantially separated from other impurities after being ground by the ball mill.
s23, weak magnetic iron removal: introducing the original ore pulp into weak magnetic iron removal equipment to primarily remove strong magnetic iron to obtain primary ore pulp; the field intensity range of the weak magnetic iron removal equipment is 800Gs-1200Gs, and the weak magnetic iron removal equipment can be flat-plate magnetic separation for example); after the original ore pulp passes through the weak magnetic iron removal equipment, the separated iron with stronger magnetism can be preliminarily removed, and experiments show that the iron content in the chromium refined powder can be reduced by about 40 percent.
s24, strong magnetic enrichment: and introducing the primary ore pulp into strong magnetic mineral separation equipment to obtain the chromium fine powder. The magnetic field intensity range of the strong magnetic separation equipment is 10000Gs-16000Gs, and the equipment can also be a flat-plate magnetic separator. After the primary ore pulp passes through the strong magnetic ore dressing equipment, weakly magnetic substances in the chromite are enriched to form chromium fine powder. The other components will form the chromium tailings. In this example, the content of the obtained chromium concentrate was 43%.
Compared with a gravity separation beneficiation process, the method is used for beneficiation of raw ores, the yield of the same raw ores is higher, the waste of chromium is reduced, and the grade of the fine chromium powder is improved; simple process, low cost and high-yield production requirement.
Example three:
as shown in fig. 3, the flow chart of the beneficiation method provided by this embodiment includes the following steps:
s31, sieving the chromium coarse powder and the chromium middling through a high-frequency vibrating screen to obtain original ore pulp with the mesh number smaller than a first set mesh number and intermediate ore powder with the mesh number larger than the first set mesh number; the chromium coarse powder has a chromium content of about 40 percent, and the chromium content in the chromium middling is about 30 percent; and s32, grinding the intermediate mineral powder to a first set mesh number by a ball grinder to obtain the original ore pulp. In this example, the first set number is 40 mesh to 50 mesh, i.e. the ore has a particle diameter of between 0.425mm to 0.355mm, and the coarse ore is substantially separated from other impurities after being ground by the ball mill.
s33, weak magnetic iron removal: introducing the original ore pulp into weak magnetic iron removal equipment to primarily remove strong magnetic iron to obtain primary ore pulp; the field intensity range of the weak magnetic iron removal equipment is 800Gs-1200Gs, and the weak magnetic iron removal equipment can be a flat plate magnetic separator for example; after the original ore pulp passes through the weak magnetic iron removal equipment, the separated iron with stronger magnetism can be preliminarily removed, and experiments show that the iron content in the chromium refined powder can be reduced by about 40 percent.
s33, strong magnetic enrichment: and introducing the primary ore pulp into strong magnetic mineral separation equipment to obtain the chromium fine powder. The magnetic field intensity of the strong magnetic separation equipment ranges from 10000Gs to 16000Gs, and the equipment can be a flat-plate magnetic separator for example. After the primary ore pulp passes through the strong magnetic ore dressing equipment, the weakly magnetic substances in the chromium ore are enriched to form chromium fine powder. The other components will form the chromium tailings. In this example, the content of the obtained chromium concentrate powder was 52%.
By the embodiment, the taste of the chromium can be greatly improved, and the chromium coarse powder in the embodiment is only relative to the chromium content of the experimental product in the embodiment; the chromium coarse powder in this embodiment may be, for example, the chromium fine powder obtained after the ferromagnetic enrichment in the first embodiment or the second embodiment.
According to the technical scheme, the iron is further removed through weak magnetism, the ratio of chromium to iron in the chromium fine powder is remarkably improved, the ratio of chromium to iron in the chromium fine powder produced by mineral separation in the embodiment is larger than 4, the taste of the chromium fine powder is remarkably improved, the economic value of the chromium fine powder is improved, the weight of the chromium fine powder with the same chromium content is reduced, and the transportation cost is reduced.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (6)
1. A chromite beneficiation method, characterized by comprising the steps of:
and (3) weak magnetic iron removal: introducing the original ore pulp into weak magnetic iron removal equipment to primarily remove strong magnetic iron to obtain primary ore pulp;
strong magnetic enrichment: and introducing the primary ore pulp into strong magnetic mineral separation equipment to obtain the chromium fine powder.
2. The chromite beneficiation process according to claim 1, wherein,
the original ore pulp is waste chromium tailings; still include before the weak magnetism deironing: and (3) mixing the waste chromium tailings until the ratio of the mine water is 30%.
3. The chromite beneficiation process according to claim 1, wherein,
the original ore pulp is obtained by the following method:
the raw ore is crushed by a crusher to obtain coarse ore with the granularity of about 20-25 mm;
and grinding the coarse ore to a first set mesh number by a ball grinding machine to obtain the original ore pulp.
4. A chromite beneficiation process according to claim 1, wherein the raw ore slurry is obtained by:
screening the chromium coarse powder and the chromium middling through a high-frequency vibrating screen to obtain original ore pulp with the mesh number smaller than a first set mesh number and intermediate ore powder with the mesh number larger than the first set mesh number;
and grinding the intermediate mineral powder to a first set mesh number by a ball grinder to obtain the original ore pulp.
5. A chromite beneficiation process according to claim 3 or 4, wherein the first set number is in a range of 40 mesh to 50 mesh.
6. The chromite beneficiation method according to any one of claims 1 to 4, wherein the magnetic field strength of the weak magnetic iron removal equipment ranges from 800Gs to 1200 Gs; the magnetic field intensity range of the beneficiation equipment is 10000Gs-16000 Gs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910658417.XA CN112246426A (en) | 2019-07-22 | 2019-07-22 | Chromite beneficiation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910658417.XA CN112246426A (en) | 2019-07-22 | 2019-07-22 | Chromite beneficiation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112246426A true CN112246426A (en) | 2021-01-22 |
Family
ID=74224307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910658417.XA Pending CN112246426A (en) | 2019-07-22 | 2019-07-22 | Chromite beneficiation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112246426A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112774862A (en) * | 2021-02-02 | 2021-05-11 | 刘小玮 | Mineral processing technology and device for chemical-grade chromium fine powder |
-
2019
- 2019-07-22 CN CN201910658417.XA patent/CN112246426A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112774862A (en) * | 2021-02-02 | 2021-05-11 | 刘小玮 | Mineral processing technology and device for chemical-grade chromium fine powder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110201791B (en) | Comprehensive utilization method of sandy kaolin tailings containing tourmaline, muscovite and quartz sand | |
| WO2014117300A1 (en) | Method for pre-treating ilmenite tailings after iron-beneficiation | |
| CN108380379B (en) | Efficient and environment-friendly beneficiation method for low-grade magnetite | |
| CN108393192B (en) | Beneficiation method for ilmenite | |
| CN108514949B (en) | Recovery method of fine-grain ilmenite | |
| CN109647616B (en) | Method for comprehensively recovering magnetite and copper minerals from copper slag flotation tailings | |
| CN109894268B (en) | Beneficiation method for tailing discarding and refining of wolframite | |
| CN110976077A (en) | Method for preparing high-purity quartz sand iron concentrate from magnetite associated granular quartz | |
| CN108580022B (en) | Mineral processing technology for producing chemical-grade chromite concentrate | |
| CN108114805A (en) | A kind of lean hematite stage grinding-magnetic separation shifts to an earlier date process for discarding tailings | |
| CN112169974B (en) | Processing technology of iron ore waste soil and stone | |
| CN112246426A (en) | Chromite beneficiation method | |
| CN109127122B (en) | Beneficiation method for improving iron and reducing silicon of magnetite concentrate | |
| CN102886301B (en) | Hematite beneficiation method | |
| CN109453892B (en) | Method for efficiently utilizing stone sawing mud containing tin and iron | |
| CN115155798A (en) | Comprehensive recycling process for iron ore dressing tailings of ultra-lean vanadium titano-magnetite | |
| CN111185297B (en) | Blast furnace low-grade copper slag enrichment method | |
| CN103962222A (en) | Method for recleaning of vanadium-titanium magnetite concentrates through calcination, alkaline leaching, desliming and magnetic separation | |
| CN110216009B (en) | Method for sorting steel slag | |
| KR100423440B1 (en) | Method for separating metal from steel-making slag | |
| CN110976068A (en) | Separation and enrichment treatment method for low-grade copper slag of blast furnace | |
| CN111715393B (en) | Mineral separation method for grading, recleaning and quality improvement of fine-grained magnetite concentrate | |
| CN118060070B (en) | Method for comprehensively recycling lithium tail mud by optimizing magnetic separation process | |
| CN107552220B (en) | Safe ore screening optimization process capable of effectively improving yield of concentrate | |
| CN114345540B (en) | Low-grade hematite rough concentrate recleaning process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210122 |