阅读说明：本技术 利用含钛选铁尾矿分级选别钛精粉及生产高钛护炉球团的选矿工艺 (Mineral processing technology for grading titanium fine powder and producing high-titanium furnace protection pellets by utilizing titanium-containing iron separation tailings ) 是由 刘坤 王婷霞 李健民 柏亚林 高承岗 魏波 何海涛 郭海宁 于 2020-10-27 设计创作，主要内容包括：本发明属于尾矿再利用技术领域,公开了一种利用含钛选铁尾矿分级选别钛精粉及生产高钛护炉球团的选矿工艺,采用分级处理含钛选铁尾矿,做到粗、细粒级分流程同步处理,达到提前抛尾的效果,从而能够充分利用含钛选铁尾矿的资源,产出钛精矿及高钛护炉球团；本发明回收利用率高、避免资源浪费且生产成本低。(The invention belongs to the technical field of tailings recycling, and discloses a mineral processing technology for grading and sorting titanium fine powder and producing high-titanium furnace protection pellets by utilizing titanium-containing iron tailings, wherein the titanium-containing iron tailings are subjected to grading treatment, so that the coarse and fine particle grading processes are synchronously treated, and the effect of discarding tailings in advance is achieved, so that the resources of the titanium-containing iron tailings can be fully utilized, and titanium concentrate and the high-titanium furnace protection pellets are produced; the invention has high recovery and utilization rate, avoids resource waste and has low production cost.)

1. A mineral processing technology for grading titanium fine powder and producing high-titanium furnace protection pellets by utilizing titanium-containing iron separation tailings is characterized by comprising the following steps:

(1) carrying out grading operation on the iron ore tailings serving as raw ore treatment to produce a coarse fraction and a fine fraction;

(2) feeding the fine fraction part produced in the step (1) into a strong magnetic IV to recover fine fraction ilmenite and produce tailings;

(3) after ball milling operation is carried out on the coarse fraction produced in the step (1), mixing the coarse fraction with fine fraction ilmenite produced by strong magnetism IV, and performing weak magnetism operation as ore feeding;

(4) weak magnetic operation is carried out to produce iron ore concentrate, and weak magnetic tailings are fed into strong magnetic operation I;

(5) performing strong magnetic operation II and III on the concentrate produced in the strong magnetic operation I in the step (4) to produce final titanium concentrate, performing one-time magnetic sweeping operation on the tailings produced in the strong magnetic operation I to produce scavenged concentrate and scavenged tailings, and combining the scavenged tailings and the tailings produced in the strong magnetic operation IV to obtain final tailings;

(6) iron ore concentrate produced by weak magnetic operation, tailings produced by strong magnetic operation II, tailings produced by strong magnetic operation III and concentrate produced by magnetic sweeping operation enter a thickener for concentration operation so as to remove redundant water;

(7) and (3) allowing the underflow of the thickener to enter a filter press for dehydration, airing the water content of the ore powder subjected to filter pressing, adding a binder for mixing after the water content is proper, and performing pelletizing, drying, roasting and cooling to obtain the high-titanium furnace protecting pellet.

2. The mineral processing technology for separating titanium concentrate and producing high-titanium furnace protecting pellets by utilizing the titanium-containing iron separation tailings in the claim 1, wherein the titanium-containing iron separation tailings used in the classification operation in the step (1) is one of a vibrating screen and a hydrocyclone.

3. The mineral processing technology for separating titanium fine powder and producing high-titanium furnace protecting pellets by utilizing the titanium-containing iron separation tailings as claimed in claim 1, wherein the classification granularity of the classification operation in the step (1) is 120-200 meshes.

4. The mineral processing technology for grading and sorting titanium fine powder and producing high-titanium furnace protecting pellets by utilizing the titanium-containing iron tailings, as claimed in claim 1, is characterized in that the ore discharge granularity of a mill in the ball milling operation in the step (3) is 70% -95% of-200 meshes.

5. The mineral processing process for grading titanium fine powder and producing high-titanium furnace protecting pellets by utilizing the titanium-containing iron separation tailings as claimed in claim 1, wherein the field intensity of the magnetic separator in the weak magnetic operation in the step (4) is 0.08-0.15T.

6. The mineral processing technology for grading and separating titanium fine powder and producing high-titanium furnace protecting pellets by utilizing the titanium-containing iron separation tailings, which is disclosed by claim 1, is characterized in that the field intensity of the magnetic separator in the step (5) in the strong magnetic operation I, the strong magnetic operation IV and the magnetic sweeping operation is 0.8-1.2T, and the field intensity of the magnetic separator in the step (5) in the strong magnetic operation II and the strong magnetic operation III is 0.6-1.0T.

7. The mineral processing process for grading and sorting titanium concentrate and producing high-titanium furnace-protecting pellets by utilizing the titanium-containing iron tailings, according to claim 1, is characterized in that the thickener in the step (6) adopts one of an inclined plate thickener and a high-efficiency thickener.

8. The mineral processing process for grading and sorting titanium fine powder and producing high-titanium furnace protecting pellets by utilizing the titanium-containing iron tailings, according to claim 1, is characterized in that the moisture content of the produced ore powder after air-drying in the step (7) is 6% -8%; and (4) in the step (7), the binder is one of bentonite and water glass.

9. The mineral processing process for grading and sorting titanium fine powder and producing high-titanium furnace protecting pellets by utilizing the titanium-containing iron tailings as claimed in claim 1, wherein the drying equipment adopted in the step (7) is a rotary kiln, and the drying temperature is 150-300 ℃; in the step (7), a belt type roasting machine is adopted for roasting, the roasting temperature is 1200-1300 ℃, and the roasting time is 30-60 min.

10. The mineral processing process for grading and sorting titanium fine powder and producing high-titanium furnace protecting pellets by utilizing the titanium-containing iron tailings, according to claim 1, is characterized in that the content of TiO2 in the high-titanium furnace protecting pellets produced in the step (7) is 10% -25%.

Technical Field

The invention belongs to the technical field of tailing recycling, relates to a beneficiation process, and particularly relates to a beneficiation process for grading and sorting titanium fine powder and producing high-titanium furnace protection pellets by utilizing titanium-containing iron tailings.

Background

The metal titanium has many excellent characteristics of light weight, high strength and good ductility, and has the highest strength-to-weight ratio; titanium can be alloyed with other elements such as iron, aluminum, vanadium or molybdenum to produce high-strength light alloys, which are widely used in various fields, including aerospace (jet engines, missiles and spacecraft), military, industrial procedures (chemical and petroleum products, seawater desalination and papermaking), automobiles, agricultural food, medicine (artificial limbs, orthopedic implants and dental instruments and fillings), kitchen utensils and sporting goods, jewelry, mobile phones and the like.

The raw materials for preparing the metallic titanium mainly comprise rutile and ilmenite, wherein the content of TiO2 of the rutile is more than 96 percent, but with the daily increase and decrease of the price and the reserve of natural rutile, all countries tend to prepare titanium-rich materials from the ilmenite, while the reserve of rutile in China is very low, but the reserve of the ilmenite is in the forefront of the world, so that how to more efficiently utilize the ilmenite becomes an important subject of the titanium metal industry in China.

Disclosure of Invention

The invention aims to provide a mineral processing technology for grading and sorting titanium fine powder and producing high-titanium furnace protecting pellets by utilizing titanium-containing iron tailings with high recovery rate, resource waste avoidance and low production cost.

In order to achieve the purpose, the invention adopts the following technical scheme: a mineral processing technology for grading titanium fine powder and producing high-titanium furnace protection pellets by utilizing titanium-containing iron separation tailings comprises the following steps:

(1) carrying out grading operation on the iron ore tailings serving as raw ore treatment to produce a coarse fraction and a fine fraction;

(2) feeding the fine fraction part produced in the step (1) into a strong magnetic IV to recover fine fraction ilmenite and produce tailings;

(3) after ball milling operation is carried out on the coarse fraction produced in the step (1), mixing the coarse fraction with fine fraction ilmenite produced by strong magnetism IV, and performing weak magnetism operation as ore feeding;

(4) iron ore concentrate is produced through weak magnetic operation, and weak magnetic tailings produced through weak magnetic operation are fed into strong magnetic operation I;

(5) performing strong magnetic operation II and III on the concentrate produced in the strong magnetic operation I in the step (4) to produce final titanium concentrate, performing one-time magnetic sweeping operation on the tailings produced in the strong magnetic operation I to produce scavenged concentrate and scavenged tailings, and combining the scavenged tailings and the tailings produced in the strong magnetic operation IV to obtain final tailings;

(6) iron ore concentrate produced by weak magnetic operation, tailings produced by strong magnetic operation II, tailings produced by strong magnetic operation III and concentrate produced by magnetic sweeping operation enter a thickener for concentration operation so as to remove redundant water;

(7) and (3) allowing the underflow of the thickener to enter a filter press for dehydration, airing the water content of the ore powder subjected to filter pressing, adding a binder for mixing after the water content is proper, and performing pelletizing, drying, roasting and cooling to obtain the high-titanium furnace protecting pellet.

Preferably, the titanium-containing iron ore dressing tailing grading equipment adopted in the grading operation in the step (1) is one of a vibrating screen and a hydrocyclone.

Preferably, the classification granularity of the classification operation in the step (1) is 120 meshes to 200 meshes.

Preferably, the mill discharge granularity of the ball milling operation in the step (3) is 70-95% of-200 meshes.

Preferably, the field intensity of the magnetic separator for the weak magnetic operation in the step (4) is 0.08-0.15T.

Preferably, the field intensity of the magnetic separator in the step (5) in the strong magnetic operation I, the strong magnetic operation IV and the magnetic sweeping operation is 0.8-1.2T, and the field intensity of the magnetic separator in the step (5) in the strong magnetic operation II and the strong magnetic operation III is 0.6-1.0T.

Preferably, the thickener in the step (6) adopts one of an inclined plate thickener and a high-efficiency thickener.

Preferably, the water content of the produced mineral powder after airing in the step (7) is 6-8%; and (4) in the step (7), the binder is one of bentonite and water glass.

Preferably, the drying equipment adopted in the step (7) is a rotary kiln, and the drying temperature is 150-; in the step (7), a belt type roasting machine is adopted for roasting, the roasting temperature is 1200-1300 ℃, and the roasting time is 30-60 min.

Preferably, the content of TiO2 in the high-titanium furnace protecting pellets produced in the step (7) is 10-25%.

Compared with the prior art, the invention has the following beneficial effects: the method adopts the classification treatment of the titanium-containing iron tailings, achieves the synchronous treatment of coarse and fine particle classification flows, and achieves the effect of discarding tailings in advance, thereby being capable of fully utilizing the resources of the titanium-containing iron tailings, producing ilmenite concentrate with TiO2 grade of more than 46 percent and high-titanium furnace protecting pellets, and simultaneously producing the high-titanium furnace protecting pellets with TiO2 grade of 10 to 25 percent from middlings with higher titanium content.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

Example 1

A mineral processing technology for grading and sorting titanium fine powder and producing high-titanium furnace protection pellets by utilizing titanium-containing iron separation tailings, a process flow chart of which is shown in figure 1, comprises the following steps:

(1) carrying out grading operation on the iron ore tailings serving as raw ore treatment to produce a coarse fraction and a fine fraction; wherein the titanium-containing iron ore tailings classification equipment adopted in the classification operation is one of a vibrating screen and a hydrocyclone, and the classification granularity of the classification operation is 120-200 meshes;

(2) feeding the fine fraction part produced in the step (1) into a strong magnetic IV to recover fine fraction ilmenite and produce tailings;

(3) after the coarse fraction produced in the step (1) is subjected to ball milling operation, wherein the ore discharge granularity of a mill in the ball milling operation is 70-95% of-200 meshes, and the coarse fraction is mixed with fine fraction ilmenite produced by strong magnetism IV and used as ore feeding to enter weak magnetism operation;

(4) the field intensity of a magnetic separator in the weak magnetic operation is 0.08-0.15T, and weak magnetic tailings produced in the weak magnetic operation are fed into a strong magnetic operation I;

(5) performing strong magnetic operation II and III on the concentrate produced in the strong magnetic operation I in the step (4) to produce final titanium concentrate, performing one-time magnetic sweeping operation on the tailings produced in the strong magnetic operation I to produce scavenged concentrate and scavenged tailings, and combining the scavenged tailings and the tailings produced in the strong magnetic operation IV to obtain final tailings; the field intensity of the magnetic separator in the strong magnetic operation I, the strong magnetic operation IV and the magnetic sweeping operation is 0.8-1.2T, and the field intensity of the magnetic separator in the strong magnetic operation II and the strong magnetic operation III is 0.6-1.0T;

(6) iron ore concentrate produced by weak magnetic operation, tailings produced by strong magnetic operation II, tailings produced by strong magnetic operation III and concentrate produced by magnetic sweeping enter a thickener for concentration operation to remove redundant moisture, wherein the thickener adopts one of an inclined plate thickener and a high-efficiency thickener;

(7) the underflow of the thickener enters a filter press for dehydration, the water content of the ore powder after filter pressing can be dried by airing, the water content of the produced ore powder after airing is 6-8%, and a binder is added and mixed after the water content is proper, wherein the binder is one of bentonite and water glass, and the high-titanium furnace protecting pellets are produced after pelletizing, drying, roasting and cooling; wherein the drying equipment is a rotary kiln, the drying temperature is 150-300 ℃, the roasting temperature is 1200-1300 ℃, the roasting time is 30-60min, and the TiO2 content in the finally produced high-titanium furnace protecting pellet is 10-25%.

Example 2

A mineral processing technology for grading and sorting titanium fine powder and producing high-titanium furnace protection pellets by utilizing titanium-containing iron separation tailings, a process flow chart of which is shown in figure 1, comprises the following steps:

(1) taking iron ore tailings of a dressing plant as the raw ore to be treated, and carrying out classification operation, wherein the classification granularity is 120 meshes, so as to produce a coarse fraction and a fine fraction;

(2) feeding the fine fraction part into a strong magnet IV with the field intensity of 1.1T to recover fine fraction ilmenite and produce tailings;

(3) grinding the coarse fraction after the grading operation to 80 percent of minus 200 meshes by a ball mill, mixing the coarse fraction with fine ilmenite produced by strong magnetism IV, and performing weak magnetism operation as ore feeding;

(4) the field intensity of the iron ore concentrate produced by the weak magnetic operation is 0.10T, so that the influence of magnetite on the subsequent titanium selecting operation is avoided, and the weak magnetic tailings are fed into the strong magnetic operation I;

(5) performing strong magnetic operation I (the field intensity is 1.1T), performing strong magnetic operation II (the field intensity is 1.0T) and III on the produced concentrate to produce final titanium concentrate (the field intensity is 0.8T), performing one-time magnetic sweeping operation on tailings of the strong magnetic operation I (the field intensity is 1.2T) to produce scavenged concentrate and scavenged tailings, and combining the scavenged tailings and the tailings produced by the strong magnetic operation IV to obtain final tailings;

(6) iron ore concentrate produced by weak magnetic operation, tailings produced by strong magnetic operation II, tailings produced by strong magnetic operation III and ore concentrate produced by magnetic sweeping enter a thickener for concentration operation so as to remove redundant water;

(7) the underflow of a thickener enters a filter press for dehydration, the water content of the ore powder produced after filter pressing is further reduced by airing and the like, bentonite with the mass fraction of 2 percent is added and mixed when the water content is 7 percent, and the mixture is pelletized, dried and roasted at the roasting temperature of 1200 ℃ for 60min and cooled to produce high-titanium furnace protecting pellets; in this embodiment, under the condition that the raw ore (titanium-containing iron tailings) is 8.7% in TiO2 grade, titanium concentrate with a TiO2 grade of 46.7% and a recovery rate of 26.73% and high titanium furnace protecting pellets with a TiO2 grade of 15.2% and a recovery rate of 48.72% can be obtained respectively.

Example 3

A mineral processing technology for grading and sorting titanium fine powder and producing high-titanium furnace protection pellets by utilizing titanium-containing iron separation tailings, a process flow chart of which is shown in figure 1, comprises the following steps:

(1) taking tailings of a dressing plant as the raw ore to be treated, performing classification operation, wherein the classification granularity is 150 meshes, and producing a coarse fraction and a fine fraction;

(2) feeding the fine fraction part into a strong magnet IV with the field intensity of 1.2T to recover fine fraction ilmenite and produce tailings;

(3) grinding the coarse fraction after the grading operation to 85 percent of-200 meshes by a ball mill, mixing the coarse fraction with fine ilmenite produced by strong magnetism IV, and performing weak magnetism operation as ore feeding;

(4) the field intensity of the iron ore concentrate produced by the weak magnetic operation is 0.12T, so that the influence of magnetite on the subsequent titanium selecting operation is avoided, and the weak magnetic tailings are fed into the strong magnetic operation I;

(5) performing strong magnetic operation I (the field intensity is 1.2T), performing strong magnetic operation II (the field intensity is 1.0T) and III on the produced concentrate to produce final titanium concentrate (the field intensity is 0.7T), performing one-time magnetic sweeping operation on tailings of the strong magnetic operation I (the field intensity is 1.2T) to produce scavenged concentrate and scavenged tailings, and combining the scavenged tailings and the tailings produced by the strong magnetic operation IV to obtain final tailings;

(6) iron ore concentrate produced by weak magnetic operation, tailings produced by strong magnetic operation II, tailings produced by strong magnetic operation III and concentrate produced by magnetic sweeping operation enter a thickener for concentration operation so as to remove redundant water;

(7) the underflow of a thickener enters a filter press for dehydration, the water content of the ore powder produced after filter pressing is further reduced by airing and the like, when the water content is 8 percent, water glass with the mass fraction of 2 percent is added for mixing, and the mixture is pelletized, dried and roasted at the roasting temperature of 1250 ℃ for 45min, and cooled to produce high-titanium furnace protecting pellets; in this example, under the condition that the grade of raw ore (titanium-containing iron tailings) TiO2 is 10.1%, titanium concentrate with grade of TiO2 of 47.3% and recovery rate of 28.24% and high titanium furnace protecting pellet with grade of TiO2 of 18.7% and recovery rate of 42.79% can be obtained respectively.

Example 4

A mineral processing technology for grading and sorting titanium fine powder and producing high-titanium furnace protection pellets by utilizing titanium-containing iron separation tailings, a process flow chart of which is shown in figure 1, comprises the following steps:

(1) taking iron tailings of a dressing plant as the raw ore to be treated, carrying out grading operation, wherein the grading granularity is 200 meshes, and producing a coarse fraction and a fine fraction;

(2) feeding the fine fraction part into a strong magnet IV with the field intensity of 1.2T to recover fine fraction ilmenite and produce tailings;

(3) grinding the coarse fraction after the grading operation to 90 percent of minus 200 meshes by a ball mill, mixing the coarse fraction with fine ilmenite produced by strong magnetism IV, and performing weak magnetism operation as ore feeding;

(4) the field intensity of the iron ore concentrate produced by the weak magnetic operation is 0.08T, so that the influence of magnetite on the subsequent titanium selecting operation is avoided, and the weak magnetic tailings are fed into the strong magnetic operation I;

(5) performing strong magnetic operation I (the field intensity is 1.2T), performing strong magnetic operation II (the field intensity is 0.9T) and strong magnetic operation III on the produced concentrate to produce final titanium concentrate (the field intensity is 0.8T), performing one-time magnetic sweeping operation on the tailings of the strong magnetic operation I (the field intensity is 1.2T) to produce scavenged concentrate and scavenged tailings, and combining the scavenged tailings and the tailings produced by the strong magnetic operation IV to obtain final tailings;

(6) iron ore concentrate produced by weak magnetic operation, tailings produced by strong magnetic operation II, tailings produced by strong magnetic operation III and concentrate produced by magnetic sweeping operation enter a thickener for concentration operation so as to remove redundant water;

(7) the underflow of a thickener enters a filter press for dehydration, the water content of the ore powder produced after filter pressing is further reduced by airing and the like, 3 mass percent of bentonite is added and mixed when the water content is 7.5 percent, and the mixture is pelletized, dried and roasted at 1300 ℃ for 35min, and cooled to produce high-titanium furnace protecting pellets; in this example, under the condition that the grade of raw ore (titanium-containing iron tailings) TiO2 is 6.9%, titanium concentrate with grade of TiO2 of 46.1% and recovery rate of 23.61% and high titanium furnace protecting pellets with grade of TiO2 of 16.8% and recovery rate of 44.24% can be obtained respectively.

Example 5

A mineral processing technology for grading and sorting titanium fine powder and producing high-titanium furnace protection pellets by utilizing titanium-containing iron separation tailings, a process flow chart of which is shown in figure 1, comprises the following steps:

(1) taking the iron ore tailings as the raw ore to be treated, and performing grading operation, wherein the grading granularity is 160 meshes, so as to produce a coarse fraction and a fine fraction;

(2) feeding the fine fraction part into a strong magnet IV with the field intensity of 1.2T to recover fine fraction ilmenite and produce tailings;

(3) grinding the coarse fraction after the grading operation to 70 percent of minus 200 meshes by a ball mill, mixing the coarse fraction with fine ilmenite produced by the strong magnetic operation IV, and performing weak magnetic operation as ore feeding;

(4) the field intensity of the iron ore concentrate produced by the weak magnetic operation is 0.06T, so that the influence of magnetite on the subsequent titanium selecting operation is avoided, and the weak magnetic tailings are fed into a strong magnetic operation I;

(5) performing strong magnetic operation I (the field intensity is 0.9T), performing strong magnetic operation II (the field intensity is 0.8T) and III on the produced concentrate to produce final titanium concentrate (the field intensity is 0.6T), performing one-time magnetic sweeping operation on tailings of the strong magnetic operation I (the field intensity is 1.2T) to produce scavenged concentrate and scavenged tailings, and combining the scavenged tailings and the tailings produced by the strong magnetic operation IV to obtain final tailings;

(6) iron ore concentrate produced by weak magnetic operation, tailings produced by strong magnetic operation II, tailings produced by strong magnetic operation III and concentrate produced by magnetic sweeping operation enter a thickener for concentration operation so as to remove redundant water;

(7) the underflow of a thickener enters a filter press for dehydration, the water content of the ore powder produced after filter pressing is further reduced by airing and the like, when the water content is 6 percent, water glass with the mass fraction of 3 percent is added for mixing, and the mixture is pelletized, dried and roasted at the roasting temperature of 1200 ℃ for 50min, and cooled to produce high-titanium furnace protecting pellets; in the embodiment, under the condition that the grade of raw ore (titanium-containing iron dressing tailings) TiO2 is 12.4%, titanium concentrate with grade of TiO2 of 48.9% and recovery rate of 27.59% and high titanium furnace protecting pellets with grade of TiO2 of 21.4% and recovery rate of 44.85% can be obtained respectively.