Ilmenite equipment configuration and process return method

Abstract

The invention discloses an ilmenite equipment configuration and process return method, and relates to the technical field of mineral separation, the ilmenite equipment configuration and process return method comprises a titanium roughing operation, a titanium scavenging operation I, a titanium scavenging operation II, a titanium concentration operation I, a titanium concentration operation II, a titanium concentration operation III and a titanium concentration operation IV, and each operation adopts flotation machines with the same number; the other flotation machines share one foam tank; the foam products of the first flotation machine in the roughing and concentration operation are returned to the first flotation machine in the next operation, the foam products of other flotation machines are returned to the second flotation machine in the next operation, and the foam products of the first flotation machine in the scavenging operation are returned to the first flotation machine in the previous operation; foam products of other flotation machines return to the second flotation machine of the previous operation, and underflow of the fine selection operation returns to the second flotation machine of the previous operation. According to the method, ilmenite differentiation separation is achieved, the middling circulation load is reduced, the use amount of sulfuric acid is reduced, the concentrate enrichment effect is improved, and finally the concentrate quality and the system recovery rate are improved.

Description

Technical Field

[0001] The invention relates to the technical field of ore dressing, in particular to an ilmenite equipment configuration and a process return method. Background Art

[0002] In the prior art, the ore is subjected to a multi-stage fine grinding and weak magnetic separation process for iron separation, and the iron tailings are subjected to classification - spiral chute gravity separation - strong magnetic separation - sulfur flotation - titanium flotation and titanium separation. The flotation of ilmenite generally adopts one roughing, two sweeping and four fine operations. The typical process flow is as follows: Figure 1 As shown in the figure, the slurry after stirring and slurry adjustment is fed into the flotation system, which includes one roughing, two scavenging and four concentrating operations. The middlings are returned in sequence, and finally qualified concentrates and tailings are produced. The equipment configuration is as follows Figure 2 As shown in the figure, the biggest feature of the conventional titanium flotation sequential return equipment configuration is the combined return of the middling ore. For the roughing operation, the three streams of fresh feed, sweep I foam, and fine I underflow are usually combined and fed into the first flotation machine of the roughing operation. Only when the equipment's slurry absorption capacity is insufficient will it be considered to return multiple streams of materials separately to ensure the smooth flow of the process, and differentiated feeding based on sorting performance is basically not involved; secondly, in terms of the volume of the equipment, based on the convenience of plant maintenance, the equipment models of each operation are kept consistent; finally, due to the consistency of the equipment model, the number of flotation machines for each operation is different. However, with the increase in mining efforts, the grade of ilmenite is getting lower and lower, the embedded particle size is obviously finer, and the association of ilmenite with gangue minerals is becoming more and more complex, resulting in low concentration and enrichment ratio of ilmenite in the flotation recovery process, and it is difficult to simultaneously ensure the grade and recovery rate of the concentrate. To solve the above problems, in production practice, the concentrate grade is generally improved by increasing the number of concentration times and increasing the amount of sulfuric acid used in the concentration stage, and the recovery rate is ensured by increasing the rough sweeping operation yield, extending the flotation time and other measures. Ultimately, problems such as the frequent flotation operations of ilmenite, long process, large acid consumption, large intermediate ore circulation load, and high operation yield arise, which is not conducive to the large-scale and efficient recovery of ilmenite.

[0003] The application number is CN202110576866.7, the publication date is 20210827, and the name is a Chinese invention patent for a speed-differential flotation process of sphalerite. The original roughing is divided into two sections (roughing one and roughing two). The sphalerite with good floatability, less entrainment and higher grade in roughing one enters the zinc concentrate two operation, and the sphalerite with poor floatability and more intergrowths in roughing two enters the zinc concentrate one operation. The zinc concentrate one middlings are regrinded and returned to the zinc roughing two after the dissociation degree is improved. It effectively reduces the inclusion of concentrate, improves the grade of zinc concentrate, reduces the process circulation volume and equipment load, and obtains better flotation indicators.

[0004] However, the two-stage roughing sphalerite rate-differential flotation process only achieves a small-scale transfer of high-quality concentrate from the roughing operation, and the high-quality foam from the roughing operation I is returned to the refining operation II, which greatly reduces the grade of the refining operation I, which will inevitably lead to a reduction in the grade of the foam product from the refining operation I. After the system is balanced, the grade of the refining operation II tends to be consistent with the concentrate quality that can be achieved by the one-stage roughing and refining operation II, and the foam products after the roughing diversion are finally mixed in the refining operation II. Therefore, the invention does not achieve differentiated rate-differential flotation of foam products and is essentially no different from the conventional process flow.

[0005] The application number is CN202410678028.4, the publication date is 20240910, and the name is a Chinese invention patent application for a flotation process for improving flotation efficiency. In view of the contradiction between insufficient dissociation and over-grinding in the return of middlings in the existing flotation process, all middlings are first floated, and useful minerals with a certain degree of dissociation but insufficient enrichment are enriched multiple times before being opened to avoid over-grinding when the selected minerals are regrinded. After flotation, the middlings are regrinded and selected again, which can further improve the flotation efficiency. However, the process adopts centralized processing of middlings, first flotation separation of the foam product with a high degree of monomer dissociation, and then regrinding, and then regrinding to the roughing operation, which increases the complexity of the process, increases the power consumption of grinding, and does not perform differentiated sorting on the collection and return of the foam product.

[0006] Therefore, the above prior art still has the problems of large ore circulation load, large amount of sulfuric acid consumption, low concentrate enrichment ratio, low concentrate grade and low recovery rate. Summary of the invention

[0007] The object of the present invention is to provide an ilmenite equipment configuration and a process return method, which is used to solve the problems of large ore circulation load, large sulfuric acid consumption, low concentrate enrichment ratio, difficult to ensure concentrate grade and low recovery rate in the ilmenite flotation process in the prior art.

[0008] The present invention solves the above problems through the following technical solutions:

[0009] An ilmenite equipment configuration and process return method includes titanium roughing operation, titanium scavenging operation I, titanium scavenging operation II, titanium concentration operation I, titanium concentration operation II, titanium concentration operation III and titanium concentration operation IV. Each operation uses the same number of N flotation machines, where N ≥ 2. The flotation machine is adjusted to match the flotation time of each operation. The first flotation machine of each operation is provided with a separate foam tank, and other flotation machines share a foam tank. The return method of the foam product is as follows:

[0010] The foam product of the first flotation cell of the titanium roughing operation is returned to the first flotation cell of the titanium concentrating I operation, the foam product of the first flotation cell of the titanium scavenging I operation is returned to the first flotation cell of the titanium roughing operation, the foam product of the first flotation cell of the titanium scavenging II operation is returned to the first flotation cell of the titanium scavenging I operation, the foam of the first flotation cell of the titanium concentrating I operation is returned to the first flotation cell of the titanium concentrating II operation, the foam of the first flotation cell of the titanium concentrating II operation is returned to the first flotation cell of the titanium concentrating III operation, and the foam of the first flotation cell of the titanium concentrating III operation is returned to the first flotation cell of the titanium concentrating IV operation;

[0011] The froth products of the flotation machines other than the first flotation machine in the titanium roughing operation are returned to the second flotation machine in the titanium concentration I operation; the froth products of the flotation machines other than the first flotation machine in the titanium scavenging I operation are returned to the second flotation machine in the titanium roughing operation; the froth products of the flotation machines other than the first flotation machine in the titanium scavenging II operation are returned to the second flotation machine in the titanium scavenging I operation; the froth products of the flotation machines other than the first flotation machine in the titanium concentration I operation are returned to the second flotation machine in the titanium concentration II operation; the froth products of the flotation machines other than the first flotation machine in the titanium concentration II operation are returned to the second flotation machine in the titanium concentration III operation; the froth products of the flotation machines other than the first flotation machine in the titanium concentration III operation are returned to the second flotation machine in the titanium concentration IV operation;

[0012] The underflow of the titanium concentration II operation is returned to the second flotation machine of the titanium concentration I operation, the underflow of the titanium concentration III operation is returned to the second flotation machine of the titanium concentration II operation, and the underflow of the titanium concentration IV operation is returned to the second flotation machine of the titanium concentration III operation.

[0013] The present invention creates different flotation paths and flotation times for fully monomer-dissociated particles and intergrown particles through a configuration mode of consistent number of flotation equipment, a setting mode of foam tanks and a return mode of foam products, forms a fast channel in the flotation process for high-quality ilmenite with fully monomer-dissociated particles, and realizes timely and efficient recovery with the optimal path and the fastest speed, which can not only meet the needs of rapid and efficient recovery of foam products, but also enable intergrown particles to be fully floated through a relatively long flotation path and time, and finally achieves differentiated sorting of ilmenite without changing the dynamic balance of the original system, reduces the circulating load of middlings, reduces the amount of sulfuric acid used, improves the concentrate enrichment effect, and finally achieves the effect of improving the concentrate quality and the system recovery rate.

[0014] Furthermore, the first flotation machine of each operation is provided with a separate foam tank, and the other flotation machines share a foam tank instead of providing a separate foam tank for each flotation machine of the operation, and the method for returning the foam product is:

[0015] The foam products of the N flotation machines in the titanium roughing operation are returned one by one to the N flotation machines in the titanium concentration I operation, the foam products of the N flotation machines in the titanium scavenging I operation are returned one by one to the N flotation machines in the titanium roughing operation, the foam products of the N flotation machines in the titanium scavenging II operation are returned one by one to the N flotation machines in the titanium scavenging I operation, the foam products of the N flotation machines in the titanium concentration I operation are returned one by one to the N flotation machines in the titanium concentration II operation, the foam products of the N flotation machines in the titanium concentration II operation are returned one by one to the N flotation machines in the titanium concentration III operation, and the foam products of the N flotation machines in the titanium concentration III operation are returned one by one to the N flotation machines in the titanium concentration IV operation;

[0016] The underflow of titanium concentration II operation is merged and returned to the second flotation machine of titanium concentration I operation. The underflow of titanium concentration III operation is merged and returned to the second flotation machine of titanium concentration II operation. The underflow of titanium concentration IV operation is merged and returned to the second flotation machine of titanium concentration III operation.

[0017] Furthermore, the return method of the foam product depends on the configuration of the flotation machine: when the flotation machine is in a stepped configuration, there are two situations. In the case of foam gravity flow, the flotation medium-sized products are directly returned by gravity through the pipeline. In the case of slurry gravity flow, additional pumps are used to realize the return of the medium-sized products.

[0018] Furthermore, when N>2, the return method of the foam product depends on the configuration of the flotation machine: when the flotation machine is configured horizontally, at least the first two flotation machines in each operation are configured as slurry suction trough flotation machines, and the rest are direct current trough flotation machines. The self-circulation of flotation medium is achieved through the configuration of the slurry suction trough flotation machine.

[0019] Furthermore, the flotation time of the titanium roughing operation, titanium scavenging operation I and titanium scavenging operation II is set to 45-65 minutes, and the flotation time of the titanium concentrating operation I, titanium concentrating operation II, titanium concentrating operation III and titanium concentrating operation IV is set to 60-80 minutes.

[0020] Furthermore, the flotation machine eliminates the bubble pushing cone structure, the overflow weir structure and the foam flushing water device.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] (1) The present invention creates different flotation paths and flotation times for fully monomer-dissociated particles and intergrown particles, forms a fast channel in the flotation process for high-quality ilmenite with fully monomer-dissociated particles, and realizes timely and efficient recovery with the optimal path and the fastest speed, which can not only meet the rapid and efficient recovery of foam products, but also enable the intergrown particles to be fully floated through a relatively long flotation path and time, and finally achieve the effect of achieving differentiated sorting of ilmenite without changing the dynamic balance of the original system, reducing the circulating load of the middling ore, reducing the amount of sulfuric acid used, improving the concentrate enrichment effect, and finally improving the concentrate quality and system recovery rate.

[0023] (2) The roughing operation, scavenging operation and fine selection operation of the present invention adopt a flotation equipment configuration method with the same number of equipment, keep the original process flow and flotation time unchanged, and ensure the consistency of the overall flotation time by adjusting the volume of the flotation equipment. Each operation realizes the collection and return of foam products of different qualities by setting two separate foam tanks, thereby achieving: 1) providing a new type of foam rapid and forced recovery device for large circular tank flotation machines, reducing the residence time of foam in the tank body, and increasing flotation efficiency and mineral processing recovery rate; 2) streamlining the structure of the flotation machine, eliminating structures such as bubble pushing cones, foam tanks, and overflow weirs, and facilitating equipment maintenance; 3) the device also has the function of defoaming, eliminating the foam flushing water device, which is conducive to solving the subsequent problem of difficulty in defoaming foam in oxidized ores such as bauxite and potassium salt, and saving water resources; 4) the device is conducive to reducing the probability of coarse and heavy minerals falling off during the process of passing through the foam layer, and increasing the recovery rate of coarse particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a typical flotation process flow chart in the prior art;

[0025] Figure 2 It is a schematic diagram of the equipment configuration of a typical ilmenite concentrator in the prior art;

[0026] Figure 3 It is a schematic diagram of the equipment configuration and process return of the present invention. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0028] Embodiment 1:

[0029] Combined with Figure 3As shown, an ilmenite equipment configuration and process return method includes titanium roughing operation, titanium scavenging operation I, titanium scavenging operation II, titanium concentrating operation I, titanium concentrating operation II, titanium concentrating operation III and titanium concentrating operation IV. Taking 4 flotation machines for each operation as an example, the volume of the flotation machine is adjusted to make the flotation machine match the flotation time of each operation;

[0030] The first flotation machine of each operation is equipped with a separate foam tank, and the second to fourth flotation machines share a foam tank; the return of the foam product is:

[0031] The foam product of the first flotation cell of the titanium roughing operation is returned to the first flotation cell of the titanium concentrating I operation, the foam product of the first flotation cell of the titanium scavenging I operation is returned to the first flotation cell of the titanium roughing operation, the foam product of the first flotation cell of the titanium scavenging II operation is returned to the first flotation cell of the titanium scavenging I operation, the foam of the first flotation cell of the titanium concentrating I operation is returned to the first flotation cell of the titanium concentrating II operation, the foam of the first flotation cell of the titanium concentrating II operation is returned to the first flotation cell of the titanium concentrating III operation, and the foam of the first flotation cell of the titanium concentrating III operation is returned to the first flotation cell of the titanium concentrating IV operation;

[0032] The froth products of the 2nd to 4th flotation machines of the titanium roughing operation are returned to the 2nd flotation machine of the titanium concentration I operation, the froth products of the 2nd to 4th flotation machines of the titanium scavenging I operation are returned to the 2nd flotation machine of the titanium roughing operation, the froth products of the 2nd to 4th flotation machines of the titanium scavenging II operation are returned to the 2nd flotation machine of the titanium scavenging I operation, the froth products of the 2nd to 4th flotation machines of the titanium concentration I operation are returned to the 2nd flotation machine of the titanium concentration II operation, the froth products of the 2nd to 4th flotation machines of the titanium concentration II operation are returned to the 2nd flotation machine of the titanium concentration III operation, and the froth products of the 2nd to 4th flotation machines of the titanium concentration III operation are returned to the 2nd flotation machine of the titanium concentration IV operation;

[0033] The underflow of the titanium concentration II operation is returned to the second flotation machine of the titanium concentration I operation, the underflow of the titanium concentration III operation is returned to the second flotation machine of the titanium concentration II operation, and the underflow of the titanium concentration IV operation is returned to the second flotation machine of the titanium concentration III operation.

[0034] Furthermore, taking the flotation line with a processing capacity of 1700t / d as an example, the titanium roughing operation and titanium concentrating operation I both use 4 16m 3 The titanium scavenging I, titanium scavenging II, titanium concentration II and titanium concentration III operations all use 4 12m flotation machines. 3 The titanium concentrate IV operation uses 4 4m flotation machines. 3 Flotation machine.

[0035] Furthermore, the return method of the foam product depends on the configuration of the flotation machine:

[0036] 1) When the flotation machines are configured horizontally, at least the first two flotation machines in each operation are configured as slurry suction tank flotation machines, and the rest are direct current tank flotation machines. The self-circulation of flotation ore is achieved through the configuration of slurry suction tank flotation machines;

[0037] 2) When the flotation machine is in a stepped configuration, there are two situations. In the case of foam gravity flow, the flotation medium-sized ore is directly returned through the pipeline. In the case of pulp gravity flow, additional pumps are used to realize the return of the medium-sized ore separately.

[0038] Furthermore, the flotation time of the titanium roughing operation, titanium scavenging operation I and titanium scavenging operation II is set to 45-65 minutes, and the flotation time of the titanium concentrating operation I, titanium concentrating operation II, titanium concentrating operation III and titanium concentrating operation IV is set to 60-80 minutes.

[0039] The roughing operation, scavenging operation and fine selection operation of the present invention adopt a flotation equipment configuration method with the same number of equipment, keep the original process flow and flotation time unchanged, and ensure the consistency of the overall flotation time by adjusting the volume of the flotation equipment. Each operation realizes the collection and return of foam products of different qualities by setting two separate foam tanks, constructs differentiated recovery paths for different minerals, and realizes fast flotation and fast discharge of fully monomer-dissociated minerals.

[0040] The present invention creates different flotation paths and flotation times for fully monomer-dissociated particles and intergrown particles, forms a fast channel in the flotation process for high-quality ilmenite with fully monomer-dissociated particles, and realizes timely and efficient recovery with the optimal path and the fastest speed, which can not only meet the rapid and efficient recovery of foam products, but also enable the intergrown particles to be fully floated through a relatively long flotation path and time, and finally achieves the differentiated sorting of ilmenite without changing the dynamic balance of the original system, reduces the circulating load of the middling ore, reduces the amount of sulfuric acid, improves the concentrate enrichment effect, and finally achieves the effect of improving the concentrate quality and the system recovery rate.

[0041] Embodiment 2:

[0042] On the basis of Example 1, each of the four flotation machines in operation is provided with a separate foam tank, and the return of the foam product is replaced by:

[0043] The foam products of the 4 flotation machines in the titanium roughing operation are returned one by one to the 4 flotation machines in the titanium scavenging operation I, the foam products of the 4 flotation machines in the titanium scavenging operation I are returned one by one to the 4 flotation machines in the titanium roughing operation, the foam products of the 4 flotation machines in the titanium scavenging operation II are returned one by one to the 4 flotation machines in the titanium scavenging operation I, the foam products of the 4 flotation machines in the titanium scavenging operation I are returned one by one to the 4 flotation machines in the titanium scavenging operation II, the foam products of the 4 flotation machines in the titanium scavenging operation II are returned one by one to the 4 flotation machines in the titanium scavenging operation III, and the foam products of the 4 flotation machines in the titanium scavenging operation III are returned one by one to the 4 flotation machines in the titanium scavenging operation IV;

[0044] The underflow of titanium concentration II operation is merged and returned to the second flotation machine of titanium concentration I operation. The underflow of titanium concentration III operation is merged and returned to the second flotation machine of titanium concentration II operation. The underflow of titanium concentration IV operation is merged and returned to the second flotation machine of titanium concentration III operation.

[0045] Realize one-to-one return of foam products.

[0046] Although the present invention is described herein with reference to the illustrative embodiments of the present invention, the above embodiments are only preferred embodiments of the present invention, and the embodiments of the present invention are not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and embodiments, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. An ilmenite equipment configuration and process return method, including titanium roughing operation, titanium scavenging I operation, titanium scavenging II operation, titanium concentrating I operation, titanium concentrating II operation, titanium concentrating III operation and titanium concentrating IV operation, characterized in that: Each operation uses the same number of N flotation machines, where N ≥ 2. The volume of the flotation machine is adjusted to match the flotation time of each operation. The first flotation machine of each operation is equipped with a separate foam tank, and the other flotation machines share a foam tank. The return method of the foam product is as follows: The foam product of the first flotation cell of the titanium roughing operation is returned to the first flotation cell of the titanium concentrating I operation, the foam product of the first flotation cell of the titanium scavenging I operation is returned to the first flotation cell of the titanium roughing operation, the foam product of the first flotation cell of the titanium scavenging II operation is returned to the first flotation cell of the titanium scavenging I operation, the foam of the first flotation cell of the titanium concentrating I operation is returned to the first flotation cell of the titanium concentrating II operation, the foam of the first flotation cell of the titanium concentrating II operation is returned to the first flotation cell of the titanium concentrating III operation, and the foam of the first flotation cell of the titanium concentrating III operation is returned to the first flotation cell of the titanium concentrating IV operation; The froth products of the flotation machines other than the first flotation machine in the titanium roughing operation are returned to the second flotation machine in the titanium concentration I operation; the froth products of the flotation machines other than the first flotation machine in the titanium scavenging I operation are returned to the second flotation machine in the titanium roughing operation; the froth products of the flotation machines other than the first flotation machine in the titanium scavenging II operation are returned to the second flotation machine in the titanium scavenging I operation; the froth products of the flotation machines other than the first flotation machine in the titanium concentration I operation are returned to the second flotation machine in the titanium concentration II operation; the froth products of the flotation machines other than the first flotation machine in the titanium concentration II operation are returned to the second flotation machine in the titanium concentration III operation; the froth products of the flotation machines other than the first flotation machine in the titanium concentration III operation are returned to the second flotation machine in the titanium concentration IV operation; The underflow of the titanium concentration II operation is returned to the second flotation machine of the titanium concentration I operation, the underflow of the titanium concentration III operation is returned to the second flotation machine of the titanium concentration II operation, and the underflow of the titanium concentration IV operation is returned to the second flotation machine of the titanium concentration III operation.

2. A method for ilmenite equipment configuration and process return according to claim 1, characterized in that: The first flotation machine of each operation is provided with a separate foam tank, and the other flotation machines share a foam tank instead of providing a separate foam tank for each flotation machine of the operation. The method for returning the foam product is as follows: The foam products of the N flotation machines in the titanium roughing operation are returned one by one to the N flotation machines in the titanium concentration I operation, the foam products of the N flotation machines in the titanium scavenging I operation are returned one by one to the N flotation machines in the titanium roughing operation, the foam products of the N flotation machines in the titanium scavenging II operation are returned one by one to the N flotation machines in the titanium scavenging I operation, the foam products of the N flotation machines in the titanium concentration I operation are returned one by one to the N flotation machines in the titanium concentration II operation, the foam products of the N flotation machines in the titanium concentration II operation are returned one by one to the N flotation machines in the titanium concentration III operation, and the foam products of the N flotation machines in the titanium concentration III operation are returned one by one to the N flotation machines in the titanium concentration IV operation; The underflow of titanium concentration II operation is merged and returned to the second flotation machine of titanium concentration I operation. The underflow of titanium concentration III operation is merged and returned to the second flotation machine of titanium concentration II operation. The underflow of titanium concentration IV operation is merged and returned to the second flotation machine of titanium concentration III operation.

3. A method for ilmenite equipment configuration and process return according to claim 1 or 2, characterized in that: The return method of the foam product depends on the configuration of the flotation machine: when the flotation machine is a step configuration, there are two situations. In the case of foam gravity flow, the flotation medium-sized products are directly returned by gravity through the pipeline. In the case of slurry gravity flow, additional pumps are used to realize the return of the medium-sized products.

4. A method for ilmenite equipment configuration and process return according to claim 1 or 2, characterized in that: When N>2, the return method of the foam product depends on the configuration of the flotation machine: when the flotation machine is configured horizontally, at least the first two flotation machines in each operation are configured as slurry suction trough flotation machines, and the rest are direct current trough flotation machines. The self-circulation of flotation medium is achieved through the configuration of the slurry suction trough flotation machines.

5. A method for ilmenite equipment configuration and process return according to claim 1 or 2, characterized in that: The flotation time of the titanium roughing operation, titanium scavenging operation I and titanium scavenging operation II is set to 45-65 minutes, and the flotation time of the titanium concentrating operation I, titanium concentrating operation II, titanium concentrating operation III and titanium concentrating operation IV is set to 60-80 minutes.

6. A method for ilmenite equipment configuration and process return according to claim 1 or 2, characterized in that: The flotation machine eliminates the bubble pushing cone structure, the overflow weir structure and the foam flushing water device.

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