阅读说明：本技术 一种水力旋流器-螺旋溜槽联合分选锆钛矿的选矿工艺 (Mineral separation process for separating zirconium and titanium ores by combining hydrocyclone and spiral chute ) 是由 陈江安 钟金根 余文 董文 周庆鑫 韦梦翔 刘柳根 王美乔 匡敬忠 邱廷省 于 2020-04-29 设计创作，主要内容包括：本发明提供一种水力旋流器-螺旋溜槽联合分选锆钛矿的选矿工艺,主要包括跳汰重选分级、水力旋流器两段分级、螺旋溜槽粗选、螺旋溜槽扫选、摇床扫选等步骤,并严格控制各关键参数。本发明采用了预选重力与粒级双重分级,并通过重力、离心力等多种力场联合作用实现锆英石和钛铁矿的分选。本方法较全面的回收了锆英石产品,锆英石产品综合回收率可以提高到96％以上,而且在尾矿回收的利用当中,把钛铁矿的回收率提高了25～35％,作业回收率达到92％以上,具有很好的经济效益。(The invention provides a mineral processing technology for separating zirconium and titanium ores by combining a hydrocyclone and a spiral chute, which mainly comprises the steps of jigging gravity separation and classification, hydrocyclone two-section classification, spiral chute rough separation, spiral chute scavenging, table scavenging and the like, and all key parameters are strictly controlled. The invention adopts pre-selection gravity and size fraction dual classification, and realizes the separation of the zirconite and the ilmenite through the combined action of various force fields such as gravity, centrifugal force and the like. The method comprehensively recovers the zirconite product, the comprehensive recovery rate of the zirconite product can be improved to more than 96%, in the process of recycling tailings, the recovery rate of ilmenite is improved by 25-35%, the operation recovery rate is more than 92%, and the method has good economic benefit.)

1. A mineral processing technology for separating zircazite by combining a hydrocyclone and a spiral chute is characterized by comprising the following steps:

the method comprises the steps of jigging and reselecting grading:

jigging and sorting the rough zircon concentrate, and dividing the rough zircon concentrate into three grade grades, namely coarse-grained and high-specific gravity minerals, medium-grained and medium-specific gravity minerals and fine-grained and low-specific gravity minerals;

the hydrocyclone classification:

the fine and small specific gravity minerals are graded into a sand sediment product and an overflow product through two sections of hydrocyclones, the sand sediment product enters a subsequent spiral chute, and the overflow product is directly thrown to the tail;

rough selection of the spiral chute:

respectively feeding the coarse-grained and large-specific gravity mineral, the medium-grained and medium-specific gravity mineral and the settled sand product obtained in the step (2) into a spiral chute, and respectively obtaining concentrate and tailings after rough separation; adopt thatA scroll spiral chute; the spiral chute is swept for 5-7 circles;

fourthly, sweeping and selecting a spiral chute:

performing scavenging on the tailings obtained in the step (3) through a spiral chute to obtain concentrate and tailings; adopt thatA scroll spiral chute; the spiral chute is swept for 5-7 circles;

fifthly, carrying out scavenging by a shaking table:

scavenging the tailings obtained in the step (4) in a shaking table to obtain zirconite concentrate and ilmenite rough concentrate; and collecting all zircon concentrates in each step.

2. The hydrocyclone-spiral chute combined zirconia-titania ore dressing process according to claim 1, wherein the jigging adopts an upper and lower sine wave jigger, the material layer of the jigging is magnetite ore with a thickness of 10mm, the stroke of the jigger is 120mm, the number of times of flushing is 200/min, and the mass concentration of fed ore is 20-30%.

3. The hydrocyclone-spiral chute combined zircon-titanium ore separation process of claim 1, wherein the coarse and high gravity minerals are +0.2mm minerals; the medium-particle and medium-specific gravity minerals are minerals of-0.2 mm +0.12 mm; the fine-grained and low specific gravity minerals are-0.12 mm minerals.

4. The hydrocyclone-spiral chute combined zirconium and titanium ore dressing process according to claim 1, wherein in the step (3), coarse and large specific gravity minerals, medium and medium specific gravity minerals and the settled sand product in the step (2) have feeding mass concentrations of 10-20% and feeding amounts of 1000-2000 kg dry ore/h.

5. The hydrocyclone-spiral chute combined zircon-titanium ore dressing process according to claim 1, wherein step (4), coarse and large specific gravity mineralsThe tailings obtained after the rough concentration are subjected to the second stepCarrying out scavenging on a strip spiral chute, wherein the spiral chute is subjected to scavenging for 5 circles to obtain concentrate and tailings; the tailings obtained after the coarse separation of medium-grain and medium-specific gravity mineral minerals are treated byCarrying out scavenging on a strip spiral chute, wherein the spiral chute adopts 6 rounds of scavenging to obtain concentrate and tailings; the tailings obtained after the coarse separation of the settled sand product are treated byAnd (4) scavenging the strip spiral chute, wherein 7 circles of scavenging is adopted for the spiral chute, so that concentrate and tailings are obtained.

6. The beneficiation process for separating zircotitanium ore by combining the hydrocyclone and the spiral chute according to the claim 1, wherein in the step (2), the cyclone has a diameter of 250mm, a sand settling opening has a diameter of 12mm, and the ore feeding pressure is kept at 100-130 kPa.

7. The hydrocyclone-spiral chute combined zircon-titanium ore dressing process according to claim 1, wherein in step (3), coarse and heavy minerals are passed throughThe method comprises the following steps of (1) carrying out a strip spiral chute, wherein the spiral chute is swept for 5 circles to obtain concentrate and tailings; medium-sized and medium-specific gravity minerals are passed throughThe method comprises the following steps of (1) carrying out a strip spiral chute, wherein the spiral chute is swept for 6 circles to obtain concentrate and tailings; the settled sand product is processed byThe scroll spiral chute is obtained by adopting 7 turns of scavengingConcentrate and tailings.

8. The hydrocyclone-spiral chute combined zirconia-titania ore dressing process according to claim 1, wherein in step (5), the process parameters of the shaker are stroke 1.0cm and stroke frequency is 400 times/min.

Technical Field

The invention belongs to the technical field of ore dressing, and particularly relates to an ore dressing process for separating zircaptite by combining a hydrocyclone and a spiral chute.

Background

The seaside placer is a very important deposit in the Hainan mineral resources of China, and the deposit is rich in the reserves of ilmenite and accompanied by zirconite, monazite and the like with extremely large reserves. Foreign sources are also abundant elsewhere, typically australia, malaysia, usa, south africa, brazil, india, etc.

At present, most of zircon and ilmenite concentrating plants in China adopt a table concentrator to separate ilmenite from zircon concentrate, and because ilmenite in zircon rough concentrate has low grade, complex particle size composition, very difficult separation by the table concentrator, small treatment capacity and high time cost, capital turnover is difficult. Along with the increasingly reduced zirconium and titanium resources in China, the production cost is high, so that the strengthening of the research on the mineral separation technology of the resources has important theoretical significance and practical application value.

Disclosure of Invention

In view of the defects of the prior art, the invention provides a mineral separation process for separating zircalite by combining a hydrocyclone and a spiral chute.

The technical scheme of the invention is as follows:

a mineral separation process for separating zircazite by combining a hydrocyclone and a spiral chute comprises the following steps:

the method comprises the steps of jigging and reselecting grading:

jigging and sorting the rough zircon concentrate, and dividing the rough zircon concentrate into three grade grades, namely coarse-grained and high-specific gravity minerals, medium-grained and medium-specific gravity minerals and fine-grained and low-specific gravity minerals;

the hydrocyclone classification:

the fine and small specific gravity minerals are graded into a sand sediment product and an overflow product through two sections of hydrocyclones, the sand sediment product enters a subsequent spiral chute, and the overflow product is directly thrown to the tail;

rough selection of the spiral chute:

respectively feeding the coarse-grained and large-specific gravity mineral, the medium-grained and medium-specific gravity mineral and the settled sand product obtained in the step (2) into a spiral chute, and respectively obtaining concentrate and tailings after rough separation; adopt thatA scroll spiral chute; the spiral chute is swept for 5-7 circles;

fourthly, sweeping and selecting a spiral chute:

performing scavenging on the tailings obtained in the step (3) through a spiral chute to obtain concentrate and tailings; adopt thatA scroll spiral chute; the spiral chute is swept for 5-7 circles;

fifthly, carrying out scavenging by a shaking table:

scavenging the tailings obtained in the step (4) in a shaking table to obtain zirconite concentrate and ilmenite rough concentrate; and collecting all zircon concentrates in each step.

Preferably, the jigging adopts an upper and lower sine wave jigger, the material layer of the jigging is 10mm of magnetite, the stroke of the jigger is 120mm, the number of times of punching is 200 times/min, and the mass concentration of ore feeding is 20-30%.

Preferably, the coarse-grained and high-specific gravity mineral is a +0.2mm mineral; the medium-particle and medium-specific gravity minerals are minerals of-0.2 mm +0.12 mm; the fine-grained and low specific gravity minerals are-0.12 mm minerals.

Preferably, in the step (3), the feeding mass concentration of the coarse-grained and large-specific gravity minerals, the feeding mass concentration of the medium-grained and medium-specific gravity minerals and the feeding mass of the settled sand product in the step (2) are respectively 10-20%, and the feeding amount is respectively 1000 kg-2000 kg dry ore amount/h.

Preferably, in the step (4), the tailings obtained after coarse-grained and high-specific gravity mineral roughing are subjected to the step ofCarrying out scavenging on a strip spiral chute, wherein the spiral chute is subjected to scavenging for 5 circles to obtain concentrate and tailings; the tailings obtained after the coarse separation of medium-grain and medium-specific gravity mineral minerals are treated byCarrying out scavenging on a strip spiral chute, wherein the spiral chute adopts 6 rounds of scavenging to obtain concentrate and tailings; the tailings obtained after the coarse separation of the settled sand product are treated byAnd (4) scavenging the strip spiral chute, wherein 7 circles of scavenging is adopted for the spiral chute, so that concentrate and tailings are obtained.

Preferably, step (2), the diameter of the cyclone is 250mm, the diameter of the sand settling opening is 12mm, and the feeding pressure is kept at 100-130 kPa.

Preferably, step (3), coarse andthe mineral with large specific gravity is passed throughThe method comprises the following steps of (1) carrying out a strip spiral chute, wherein the spiral chute is swept for 5 circles to obtain concentrate and tailings; medium-sized and medium-specific gravity minerals are passed throughThe method comprises the following steps of (1) carrying out a strip spiral chute, wherein the spiral chute is swept for 6 circles to obtain concentrate and tailings; the settled sand product is processed byAnd 7 circles of scavenging are adopted in the spiral chute to obtain concentrate and tailings.

Preferably, in step (5), the process parameters of the shaking table are that the stroke is 1.0cm and the stroke frequency is 400 times/min.

Compared with the prior art, the invention has the beneficial effects that:

the invention adopts the specific gravity and particle size dual grading technology on equipment, the equipment which is combined with various force fields such as gravity, centrifugal force and the like after grading, such as a hydraulic classifier, a spiral chute, a shaking table and the like, is an important supporting point for realizing the method, and the new mineral separation process is matched with the sorting equipment, so that good sorting effect is brought.

Secondly, in the sorting process, double classification of pre-selection gravity and size fraction is adopted, and sorting is respectively carried out, so that the tobacco leaves are thrown early and are comprehensively recycled. Therefore, the interference of the zircon and the ilmenite in the sedimentation process of different grain grades is less, the grading according to the weight is easy, the mutual interference sedimentation is not easy to generate to influence the gravity separation, the treatment capacity can be increased, the time cost is reduced, the production efficiency is improved, and the method is also another important support point for realizing the method.

Compared with the prior art, the method comprehensively recovers the zirconite product, the comprehensive recovery rate of the zirconite product can be improved to more than 96%, the recovery rate of ilmenite is improved by 25-35% in the recovery and utilization of tailings, the operation recovery rate reaches more than 92%, and the method has good economic benefit.

Drawings

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

Detailed Description

In order to better understand the technical content of the invention, specific examples are provided below to further illustrate the invention.