A short process flotation recovery method of zinc oxide ore

Abstract

The present application relates to a kind of short process flotation recovery methods of zinc oxide ore, belong to mineral processing technical field.The traditional process is used to the zinc oxide ore, and there are technical problems such as long flotation process, multiple dosing points, large influence of middlings return, unstable production process, poor recovery index, etc., the present application improves the enrichment effect and separation index of zinc oxide mineral in ore by the combination of efficient regulator and collector, most of the zinc oxide minerals in ore can be recovered by only once roughing operation, and only once concentration operation can ensure the grade of zinc ore, realize the short process flotation recovery of zinc oxide ore.Middlings in flotation are not returned to roughing and concentration operation, avoid the accumulation and circulation of slime in flotation system, eliminate the deterioration of slime on the separation index of zinc oxide ore.The present application simplifies the separation process, reduces the production energy consumption and cost, economically and efficiently solves the foam control and slime suppression problem of micro-fine particle zinc oxide ore, greatly improves the utilization rate of zinc resources.

Description

Technical Field

[0001] This invention relates to a short-process flotation recovery method for zinc oxide ore, belonging to the field of mineral processing technology. Background Technology

[0002] Zinc oxide ore is an important zinc resource, and amine sulfide flotation is a commonly used enrichment process for zinc oxide ore. Zinc oxide ore often contains large amounts of mica, sericite, chlorite, shale, limonite, etc., resulting in a large amount of primary slime in the ore. Secondary slime is also generated during the crushing and grinding process. This slime has a negatively charged surface, consuming a large amount of positively charged amine collectors and adhering to the surfaces of various minerals, preventing the collectors from selectively reacting with zinc oxide minerals. To solve this problem, researchers often extend the flotation process or add large amounts of reagents to control the flotation process. However, this leads to a long flotation process, numerous reagent addition points, high investment, and complex operation. In addition, amine-containing slime will also adhere to the mineralized foam, making the flotation foam "armored" by the slime and amine collectors. This results in a long lifespan and high stability of the flotation foam. This not only increases the circulation volume of middlings, but also makes the fluidity of the ore-carrying foam extremely poor and difficult to eliminate, causing serious "cage run-off" phenomenon. Ultimately, this makes the flotation process difficult to control and production difficult to carry out.

[0003] Therefore, there is an urgent need to develop new and efficient flotation reagents and processes to eliminate the impact of slime on the flotation of zinc oxide ore, and to recover this type of zinc ore resource in an economical and efficient manner, so as to provide technical support for the green, low-carbon and efficient utilization of complex and difficult-to-process zinc oxide resources. Summary of the Invention

[0004] To address the technical challenges of traditional flotation processes for zinc oxide ore, such as long flotation flows, numerous reagent addition points, significant impact from middlings return, unstable production processes, and poor recovery rates, this invention proposes a short-process flotation recovery method for zinc oxide ore. This method utilizes a combination of highly efficient modifiers and collectors to improve the enrichment and separation of zinc oxide minerals in the ore. Only one roughing operation is required to recover the vast majority of zinc oxide minerals from the ore, and only one cleaning operation is needed to ensure the zinc ore grade, thus achieving short-process flotation recovery of zinc oxide ore. Middlings from flotation are not returned to the roughing and cleaning operations, avoiding the accumulation and recycling of slime in the flotation system and eliminating the deterioration of zinc oxide ore separation rates by slime. This invention simplifies the beneficiation process, reduces production energy consumption and costs, and economically and efficiently solves the problems of foam control and slime suppression in fine-grained zinc oxide ore, greatly improving the utilization rate of zinc resources.

[0005] A short-process flotation recovery method for zinc oxide ore, the specific steps of which are as follows:

[0006] (1) Crush and grind the zinc oxide ore until the zinc oxide minerals are fully liberated, and add water to adjust the slurry to a slurry mass percentage concentration of 24-32%;

[0007] (2) Sodium sulfide, composite modifier and composite collector are added to the slurry obtained in step (1) in sequence for roughing to obtain rough concentrate and rough tailings;

[0008] (3) Add a composite collector to the rough concentrate obtained in step (2) for fine cleaning to obtain zinc concentrate I and fine tailings;

[0009] (4) The composite modifier and composite collector are added sequentially to the rough tailings obtained in step (2) for scavenging to obtain scavenged concentrate and scavenged tailings;

[0010] (5) The tailings obtained in step (3) and the scavenging concentrate obtained in step (4) are combined to form a mixed middlings. A composite modifier and a composite collector are added to the mixed middlings in sequence for fine scavenging to obtain zinc concentrate II and fine scavenging tailings. The fine scavenging tailings are returned to the slurry and incorporated into the scavenging in step (4).

[0011] (6) The zinc concentrate I obtained in step (3) and the zinc concentrate II obtained in step (5) are combined to obtain the zinc concentrate product, and the scavenging tailings obtained in step (4) are flotation tailings;

[0012] The composite modifier is a mixture of sodium carbonate, water glass, and guar gum, and the composite collector is a mixture of dodecylamine, glycerol, sodium dodecylbenzenesulfonate, and octylphenol polyoxyethylene ether.

[0013] Based on a 100% mass fraction of the composite modifier, sodium carbonate accounts for 30-40%, water glass accounts for 35-45%, and guar gum accounts for 20-30%; based on a 100% mass fraction of the composite collector, dodecylamine accounts for 25-35%, glycerol accounts for 30-40%, sodium dodecylbenzenesulfonate accounts for 25-30%, and octylphenol polyoxyethylene ether accounts for 5-10%.

[0014] In step (1), the zinc oxide ore contains 5.6% to 11.8% zinc by mass.

[0015] For each ton of zinc oxide ore, 9-12 kg of sodium sulfide, 700-900 g of compound modifier and 500-700 g of compound collector are added to the slurry in step (2) roughing operation.

[0016] For every ton of zinc oxide ore, 50-100g of compound collector is added to the slurry of the finely processed step (3).

[0017] For every ton of zinc oxide ore, 350-450g of composite modifier and 100-140g of composite collector are added to the slurry in step (4) scavenging operation.

[0018] For every ton of zinc oxide ore, 350-450g of composite modifier and 50-70g of composite collector are added to the slurry in step (5) fine scavenging operation.

[0019] The beneficial effects of this invention are:

[0020] (1) This invention fully utilizes the synergistic effect of composite reagents to achieve efficient dispersion of zinc oxide ore, selective inhibition of gangue minerals and sufficient hydrophobicity of target minerals. Most zinc oxide minerals in the ore can be recovered with only one roughing operation and the zinc ore grade can be guaranteed with only one cleaning operation, laying the foundation for short-process flotation recovery of zinc oxide minerals.

[0021] (2) The middlings generated during the flotation process of this invention are not returned to the roughing and cleaning operations, thus avoiding the accumulation and circulation of slime in the flotation system, eliminating the deterioration of zinc oxide ore separation index by slime, reducing the consumption of flotation reagents, optimizing the flotation foam structure and ore carrying capacity, solving the problem of foam control and slime suppression in fine-grained zinc oxide ore, and greatly improving the utilization rate of zinc resources.

[0022] (3) The fine sweeping operation of the present invention not only solves the problem of middlings storage, but also effectively increases the flotation recovery rate of zinc minerals;

[0023] (4) This invention is simple to operate, easy to use, and highly controllable. It simplifies the beneficiation process, reduces production energy consumption and costs, and improves flotation indicators. It economically and efficiently solves the technical problems of long flotation process, many reagent addition points, large impact of middlings return, unstable production process, and poor recovery indicators in zinc oxide ore using traditional processes, and realizes short-process flotation recovery of zinc oxide ore. Attached Figure Description

[0024] Figure 1 This is a process flow diagram of the present invention. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to specific embodiments, but the scope of protection of the present invention is not limited to the content described.

[0026] In the following embodiments of the present invention, the flotation process consists of one roughing, one cleaning, one scavenging and one fine scavenging. The middlings are not returned to the roughing and cleaning operations. The composite modifier is a mixture of sodium carbonate, water glass and guar gum, and the composite collector is a mixture of dodecylamine, glycerol, sodium dodecylbenzenesulfonate and octylphenol polyoxyethylene ether.

[0027] Example 1: In this example, the composite modifier has a mass fraction of 100%, sodium carbonate accounts for 30%, water glass accounts for 45%, and guar gum accounts for 25%; the composite collector has a mass fraction of 100%, dodecylamine accounts for 25%, glycerol accounts for 40%, sodium dodecylbenzenesulfonate accounts for 25%, and octylphenol polyoxyethylene ether accounts for 10%.

[0028] A short-process flotation recovery method for zinc oxide ore (see...) Figure 1 The specific steps are as follows:

[0029] (1) The zinc oxide ore is crushed and ground until the zinc oxide minerals are fully liberated, and water is added to adjust the slurry to a slurry mass percentage concentration of 24%, wherein the zinc mass percentage content in the zinc oxide ore is 5.6%;

[0030] (2) Sodium sulfide, compound modifier and compound collector are added to the slurry obtained in step (1) in sequence for roughing operation to obtain roughing concentrate and roughing tailings; 9 kg of sodium sulfide, 700 g of compound modifier and 500 g of compound collector are added to the slurry of the roughing operation per ton of zinc oxide ore.

[0031] (3) Add a compound collector to the rough concentrate obtained in step (2) for fine cleaning to obtain zinc concentrate I and fine tailings; add 50g of compound collector to the slurry of fine cleaning operation per ton of zinc oxide ore.

[0032] (4) The composite modifier and composite collector are added sequentially to the rough tailings obtained in step (2) to carry out scavenging operations, and scavenging concentrate and scavenging tailings are obtained; 350g of composite modifier and 100g of composite collector are added to the slurry of the scavenging operation per ton of zinc oxide ore.

[0033] (5) The tailings obtained in step (3) and the scavenging concentrate obtained in step (4) are combined to form a mixed middlings. A composite modifier and a composite collector are added in sequence for fine scavenging to obtain zinc concentrate II and fine scavenging tailings. The fine scavenging tailings are returned to the slurry and incorporated into the scavenging operation in step (4). For each ton of zinc oxide ore, 350g of composite modifier and 50g of composite collector are added to the slurry of the fine scavenging operation.

[0034] (6) The zinc concentrate I obtained in step (3) and the zinc concentrate II obtained in step (5) are combined to obtain the zinc concentrate product. The scavenging tailings obtained in step (4) are the flotation tailings.

[0035] In this embodiment, the zinc flotation recovery rate was 82.7%.

[0036] Example 2: In this example, the composite modifier has a mass fraction of 100%, with sodium carbonate accounting for 35%, water glass accounting for 35%, and guar gum accounting for 30%; the composite collector has a mass fraction of 100%, with dodecylamine accounting for 30%, glycerol accounting for 35%, sodium dodecylbenzenesulfonate accounting for 30%, and octylphenol polyoxyethylene ether accounting for 5%.

[0037] A short-process flotation recovery method for zinc oxide ore (see...) Figure 1 The specific steps are as follows:

[0038] (1) The zinc oxide ore is crushed and ground until the zinc oxide minerals are fully liberated, and water is added to adjust the slurry to a slurry mass percentage concentration of 28%, wherein the zinc mass percentage content in the zinc oxide ore is 8.7%;

[0039] (2) Sodium sulfide, compound modifier and compound collector are added to the slurry obtained in step (1) in sequence for roughing operation to obtain roughing concentrate and roughing tailings; based on each ton of zinc oxide ore, 10.5 kg of sodium sulfide, 800 g of compound modifier and 600 g of compound collector are added to the slurry for roughing operation.

[0040] (3) Add a compound collector to the rough concentrate obtained in step (2) for fine cleaning to obtain zinc concentrate I and fine tailings; 75g of compound collector is added to the slurry of fine cleaning per ton of zinc oxide ore.

[0041] (4) The composite modifier and composite collector are added to the rough tailings obtained in step (2) in sequence for scavenging operation to obtain scavenging concentrate and scavenging tailings; 400g of composite modifier and 120g of composite collector are added to the slurry of the scavenging operation per ton of zinc oxide ore.

[0042] (5) The tailings obtained in step (3) and the scavenging concentrate obtained in step (4) are combined to form a mixed middlings. A composite modifier and a composite collector are added in sequence for fine scavenging to obtain zinc concentrate II and fine scavenging tailings. The fine scavenging tailings are returned to the slurry and incorporated into the scavenging operation in step (4). For each ton of zinc oxide ore, 400g of composite modifier and 60g of composite collector are added to the slurry of the fine scavenging operation.

[0043] (6) The zinc concentrate I obtained in step (3) and the zinc concentrate II obtained in step (5) are combined to obtain the zinc concentrate product. The scavenging tailings obtained in step (4) are the flotation tailings.

[0044] In this embodiment, the zinc flotation recovery rate was 84.3%.

[0045] Example 3: In this example, the composite modifier has a mass fraction of 100%, sodium carbonate accounts for 40%, water glass accounts for 40%, and guar gum accounts for 20%; the composite collector has a mass fraction of 100%, dodecylamine accounts for 35%, glycerol accounts for 30%, sodium dodecylbenzenesulfonate accounts for 30%, and octylphenol polyoxyethylene ether accounts for 5%.

[0046] A short-process flotation recovery method for zinc oxide ore (see...) Figure 1 The specific steps are as follows:

[0047] (1) The zinc oxide ore is crushed and ground until the zinc oxide minerals are fully liberated, and water is added to adjust the slurry to a slurry mass percentage concentration of 32%, wherein the zinc mass percentage content in the zinc oxide ore is 11.8%;

[0048] (2) Sodium sulfide, compound modifier and compound collector are added to the slurry obtained in step (1) in sequence for roughing operation to obtain roughing concentrate and roughing tailings; based on each ton of zinc oxide ore, 12 kg of sodium sulfide, 900 g of compound modifier and 700 g of compound collector are added to the slurry for roughing operation.

[0049] (3) Add a compound collector to the rough concentrate obtained in step (2) for fine cleaning to obtain zinc concentrate I and fine tailings; 100g of compound collector is added to the slurry of fine cleaning per ton of zinc oxide ore.

[0050] (4) The composite modifier and composite collector are added sequentially to the rough tailings obtained in step (2) for scavenging operation to obtain scavenging concentrate and scavenging tailings; 450g of composite modifier and 140g of composite collector are added to the slurry of the scavenging operation per ton of zinc oxide ore.

[0051] (5) The tailings obtained in step (3) and the scavenging concentrate obtained in step (4) are combined to form a mixed middlings. A composite modifier and a composite collector are added in sequence for fine scavenging to obtain zinc concentrate II and fine scavenging tailings. The fine scavenging tailings are returned to the slurry and incorporated into the scavenging operation in step (4). For each ton of zinc oxide ore, 450g of composite modifier and 70g of composite collector are added to the slurry of the fine scavenging operation.

[0052] (6) The zinc concentrate I obtained in step (3) and the zinc concentrate II obtained in step (5) are combined to obtain the zinc concentrate product. The scavenging tailings obtained in step (4) are the flotation tailings.

[0053] In this embodiment, the zinc flotation recovery rate was 86.8%.

[0054] The specific embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A short-process flotation recovery method for zinc oxide ore, characterized in that, The specific steps are as follows: (1) The zinc oxide ore is crushed and ground until the zinc oxide minerals are fully liberated, and water is added to adjust the slurry to a slurry mass percentage concentration of 24-32%; the zinc mass percentage content in the zinc oxide ore is 5.6-11.8%; (2) Sodium sulfide, composite modifier and composite collector are added to the slurry obtained in step (1) in sequence for roughing to obtain rough concentrate and rough tailings; (3) The rough concentrate obtained in step (2) is added with a composite collector for fine cleaning to obtain zinc concentrate I and fine tailings; (4) The composite modifier and composite collector are added sequentially to the rough tailings obtained in step (2) to carry out scavenging to obtain scavenged concentrate and scavenged tailings; (5) The tailings obtained in step (3) and the scavenging concentrate obtained in step (4) are combined to form a mixed middlings. A composite modifier and a composite collector are added to the mixed middlings in sequence for fine scavenging to obtain zinc concentrate II and fine scavenging tailings. The fine scavenging tailings are returned to the slurry and incorporated into the scavenging in step (4). (6) The zinc concentrate I obtained in step (3) and the zinc concentrate II obtained in step (5) are combined to obtain the zinc concentrate product, and the scavenging tailings obtained in step (4) are flotation tailings; The composite modifier is a mixture of sodium carbonate, water glass, and guar gum. Based on a mass fraction of 100%, sodium carbonate accounts for 30-40%, water glass for 35-45%, and guar gum for 20-30%. The composite collector is a mixture of dodecylamine, glycerol, sodium dodecylbenzenesulfonate, and octylphenol polyoxyethylene ether. Based on a mass fraction of 100%, dodecylamine accounts for 25-35%, glycerol for 30-40%, sodium dodecylbenzenesulfonate for 25-30%, and octylphenol polyoxyethylene ether for 5-10%.

2. The short-process flotation recovery method for zinc oxide ore according to claim 1, characterized in that: For each ton of zinc oxide ore, 9-12 kg of sodium sulfide, 700-900 g of compound modifier and 500-700 g of compound collector are added to the slurry in step (2) roughing operation.

3. The short-process flotation recovery method for zinc oxide ore according to claim 1, characterized in that: For every ton of zinc oxide ore, 50-100g of compound collector is added to the slurry of the finely processed ore in step (3).

4. The short-process flotation recovery method for zinc oxide ore according to claim 1, characterized in that: For every ton of zinc oxide ore, 350-450g of composite modifier and 100-140g of composite collector are added to the slurry in step (4) scavenging operation.

5. The short-process flotation recovery method for zinc oxide ore according to claim 1, characterized in that: For each ton of zinc oxide ore, 350-450g of composite modifier and 50-70g of composite collector are added to the slurry in step (5) fine scavenging operation.

Images