Oxidized ore collector, its preparation method and application

Abstract

The application provides an oxidized ore collector, which comprises a medicament and water required for dissolving the medicament, wherein the medicament comprises the following raw material components in percentage by weight: 60-75% of sodium oleate, 3-5% of sodium hydroxide and 20-37% of water sludge; the water sludge is solid waste after flocculation, sedimentation and water leaching of wastewater containing p-xylene acid and p-carboxybenzoic acid generated by refined p-xylene. The oxidized ore collector provided by the application uses chemical water sludge to replace part of sodium oleate, which not only realizes resource recycling of the water sludge and reduces the environmental protection pressure of the petrochemical industry, but also reduces the production cost of the oxidized ore collector and widens the raw material source of the oxidized ore collector. The application further provides a preparation method and application of the oxidized ore collector.

Description

Technical Field

[0001] This invention relates to the field of mineral processing technology, specifically to an oxide mineral collector, its preparation method and application, and particularly to an oxide mineral collector prepared using chemical water-based materials and its application. Background Technology

[0002] Sodium oleate, as the most commonly used collector for oxide ores, possesses excellent foaming and collecting abilities. Sodium oleate primarily adsorbs onto the mineral surface through the interaction of its carboxyl groups and metal ions, causing the mineral to float hydrophobically. Sodium oleate can be used for the flotation of almost all oxide ores, such as scheelite, fluorite, apatite, bauxite, and ilmenite. The annual consumption of sodium oleate as a flotation reagent is enormous. The raw materials used to produce sodium oleate are mainly various acidified vegetable oils, such as acidified soybean oil, acidified corn oil, acidified palm oil, and acidified cottonseed oil, resulting in high raw material costs.

[0003] Petrochemical companies producing paraxylene (PTA) generate wastewater containing crude terephthalic acid and p-carboxybenzoic acid. After flocculation, sedimentation, and filtration, this wastewater becomes solid waste water. The treatment of this solid waste water increases the environmental burden on companies and reduces their economic benefits.

[0004] Therefore, it is necessary to provide a new method to simultaneously solve the problems of raw material sourcing for oxide mineral collector production and water treatment of solid waste generated from PTA production. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an oxide mineral collector that uses chemical water-reclaimed material to replace part of the sodium oleate, thereby realizing the resource recycling of water-reclaimed material, reducing the environmental pressure on the petrochemical industry, reducing the production cost of the oxide mineral collector, and broadening the raw material sources of the oxide mineral collector.

[0006] The technical solution of the present invention is as follows:

[0007] An oxidizing mineral collector includes a reagent and water for dissolving the reagent, wherein the reagent comprises the following raw material components by weight percentage:

[0008] Sodium oleate 60%–75%, sodium hydroxide 3%–5%, water-based material 20%–37%;

[0009] The water-reclaimed material is the solid waste produced from the refining of p-xylene, which contains p-xylene acid and p-carboxybenzoic acid, after flocculation, sedimentation, and dewatering.

[0010] Furthermore, the reagent and water are prepared in a weight ratio of 1-20:80-99.

[0011] This invention also provides a method for preparing an oxide mineral collector, comprising the following steps:

[0012] Add the raw materials of the medicine to the water in the specified proportions and stir until completely dissolved. The weight ratio of the medicine to the water is 1-20:80-99.

[0013] Furthermore, the preparation method of the oxide mineral collector includes the following steps:

[0014] Step S1: Add the water-removed material to the water and start stirring;

[0015] Step S2: Add sodium hydroxide to water in 2-4 portions, with an interval of 5-10 minutes between each addition. After the sodium hydroxide is added, continue stirring until the water and the material are completely dissolved.

[0016] Step S3: Add sodium oleate to water all at once and stir until it is completely dissolved.

[0017] The present invention also provides an application of the oxide mineral collector in the flotation process of scheelite, fluorite, apatite, bauxite, and ilmenite.

[0018] Compared with the prior art, the present invention provides an oxide mineral collector, its preparation method and application, with the following advantages:

[0019] I. The oxide mineral collector provided by this invention uses chemical water-based feedstock to replace part of the sodium oleate for the flotation of oxide minerals. The water-based feedstock is solid waste from wastewater containing p-xylene acid and p-carboxybenzoic acid produced during the refining of p-xylene, after flocculation, sedimentation, and dewatering. P-xylene acid and p-carboxybenzoic acid contain the same characteristic carboxyl group as sodium oleate, and can also act on the mineral surface. The hydrocarbon chains of p-xylene acid and p-carboxybenzoic acid are shorter than those of sodium oleate and have a cyclic structure, exhibiting stronger hydrophilicity. When used as an oxide mineral collector, they can increase the steric hindrance effect between molecules, improve the collector's dispersibility, and overcome the shortcomings of sodium oleate, which has strong collecting ability but poor selectivity and dispersibility. Therefore, the collector provided by this invention has a superior flotation effect compared to existing technologies using sodium oleate as a collector.

[0020] Second, the oxide mineral collector provided by this invention uses chemical water-reclaimed material to replace part of the sodium oleate, which broadens the source of raw materials for the production of oxide mineral collectors and reduces raw material costs; at the same time, it solves the problem of water-reclaimed material treatment in PTA production, realizes the resource recycling of water-reclaimed material, and improves the economic benefits of enterprises. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above-mentioned objectives, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be further described below.

[0022] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0023] Example 1

[0024] An oxidizing mineral collector includes a reagent and water for dissolving the reagent, wherein the reagent comprises the following raw material components by weight percentage:

[0025] Sodium oleate 60%, sodium hydroxide 3%, water 37%;

[0026] The reagent and water are prepared in a weight ratio of 1:99.

[0027] The method for preparing the oxide mineral collector in this embodiment is as follows:

[0028] Step S1: Add the water-removed material to the water and start stirring;

[0029] Step S2: Add sodium hydroxide to water in three portions, with a 10-minute interval between each addition. After the sodium hydroxide is added, continue stirring until the water and the sodium hydroxide are completely dissolved.

[0030] Step S3: Add sodium oleate to water all at once and stir until it is completely dissolved.

[0031] A comparative experiment was conducted between the collector in Example 1 and the technical solution that uses sodium oleate alone as a collector, as detailed below:

[0032] The ore sample was a low-grade scheelite ore from Henan Province, with a WO3 grade of 0.08%. Sodium carbonate was used to adjust the pH of the pulp at a dosage of 1200 g / t, and water glass was used as a gangue depressant at a dosage of 200 g / t. The flotation indices of the two are compared in Table 1:

[0033] Table 1: Comparison of flotation results between Example 1 and sodium oleate collector

[0034] Types of collectors Collector dosage (g / t) Recovery rate / % grade / % Sodium oleate 300 67.88 0.850 Example 1 300 71.18 0.990

[0035] As shown in Table 1, the oxidized ore collector of Example 1 has a 3.4% higher scheelite recovery rate than sodium oleate in the flotation process of low-grade scheelite, and the grade of the rough concentrate is also higher. This indicates that the water-reclaimed material can be compounded with sodium oleate for the flotation of oxidized ores, and the flotation effect is better than the technical solution that uses sodium oleate alone.

[0036] Example 2

[0037] An oxidizing mineral collector includes a reagent and water for dissolving the reagent, wherein the reagent comprises the following raw material components by weight percentage:

[0038] Sodium oleate 75%, sodium hydroxide 5%, water 20%.

[0039] The reagent and water are prepared in a weight ratio of 20:80.

[0040] The method for preparing the oxide mineral collector in this embodiment is as follows:

[0041] Step S1: Add the water-removed material to the water and start stirring;

[0042] Step S2: Add sodium hydroxide to water in 4 portions, with an interval of 5 minutes between each addition. After the sodium hydroxide is added, continue stirring until the water and the material are completely dissolved.

[0043] Step S3: Add sodium oleate to water all at once and stir until it is completely dissolved.

[0044] A comparative experiment was conducted between the collector in Example 2 and the technical solution that uses sodium oleate alone as a collector, as detailed below:

[0045] The ore sample was a high-calcium fluorite from Henan Province, with a raw ore grade of 30.15%. Sodium carbonate was used to adjust the pulp pH at a rate of 600 g / t. Water glass was used as a gangue depressant at a rate of 1000 g / t in the roughing stage, and 200 g / t of water glass was added in each of the six cleaning stages. After a closed-circuit flotation process involving one roughing and six cleaning stages, the flotation indices of the two processes are compared in Table 2.

[0046] Table 2: Comparison of flotation results between Example 2 and sodium oleate collector

[0047] Types of collectors Collector dosage (g / t) Recovery rate / % grade / % Sodium oleate 800 78.56 97.36 Example 2 800 79.35 97.89

[0048] As can be seen from Table 2, under the same dosage, the fluorite concentrate recovery rate and grade obtained by using the collector provided in Example 2 are comparable to those of sodium oleate as a collector. This indicates that water-reclaimed material can replace part of sodium oleate for the collection of oxidized ores, reduce the raw material cost of the collector, and make the solid waste of water-reclaimed material a resource.

[0049] Example 3

[0050] An oxidizing mineral collector includes a reagent and water for dissolving the reagent, wherein the reagent comprises the following raw material components by weight percentage:

[0051] Sodium oleate 65%, sodium hydroxide 4%, water 31%.

[0052] The reagent and water are prepared in a weight ratio of 10:90.

[0053] The method for preparing the oxide mineral collector in this embodiment is as follows:

[0054] Step S1: Add the water-removed material to the water and start stirring;

[0055] Step S2: Add sodium hydroxide to the water in two portions, with an 8-minute interval between each portion. After the sodium hydroxide is added, continue stirring until the water and the material are completely dissolved.

[0056] Step S3: Add sodium oleate to water all at once and stir until it is completely dissolved.

[0057] A comparative experiment was conducted between the collector in Example 3 and the technical solution that uses sodium oleate alone as a collector, as detailed below:

[0058] The feed sample was a low-grade apatite from Hebei Province, with a P2O5 grade of 1.45%. Sodium carbonate was used to adjust the pulp pH at a rate of 2000 g / t. Water glass was used as a gangue depressant, with a roughing rate of 1000 g / t and a cleaning rate of 200 g / t. After a closed-circuit flotation process involving both roughing and cleaning, the flotation indices for both processes are compared in Table 3.

[0059] Table 3: Comparison of flotation results between Example 2 and sodium oleate collector

[0060] Types of collectors Collector dosage (g / t) Recovery rate / % grade / % Sodium oleate 200 82.32 33.25 Example 2 200 82.54 34.07

[0061] As can be seen from Table 3, under the same dosage, the fluorite concentrate recovery rate and grade obtained by using the collector provided in Example 2 are comparable to those of sodium oleate as a collector. This indicates that water-reclaimed material can replace part of sodium oleate for the collection of oxidized ores, reduce the raw material cost of the collector, and make the solid waste of water-reclaimed material a resource.

[0062] Comparative Example 1

[0063] An oxidizing mineral collector includes a reagent and water for dissolving the reagent, wherein the reagent comprises the following raw material components by weight percentage:

[0064] Sodium oleate 56%, sodium hydroxide 4%, water 40%.

[0065] The reagent and water are prepared in a weight ratio of 10:90.

[0066] The preparation method of the oxide mineral collector in Comparative Example 1 is as described in Example 3.

[0067] Comparative Example 2

[0068] An oxidizing mineral collector includes a reagent and water for dissolving the reagent, wherein the reagent comprises the following raw material components by weight percentage:

[0069] Sodium oleate 81%, sodium hydroxide 4%, water 15%.

[0070] The reagent and water are prepared in a weight ratio of 10:90.

[0071] The preparation method of the oxide mineral collector in Comparative Example 2 is as described in Example 3.

[0072] The collectors of Comparative Example 1 and Comparative Example 2 were subjected to flotation tests as in Example 3, and the flotation performance comparisons are shown in Table 4:

[0073] Table 4: Comparison of collector flotation results between Comparative Example 1 and Comparative Example 2

[0074] Types of collectors Collector dosage (g / t) Recovery rate / % grade / % Comparative Example 1 200 75.12 33.35 Comparative Example 2 200 83.01 28.43

[0075] As shown in Table 4, when the proportion of water-reclaimed material added is too high, the collecting capacity of the prepared collector decreases, resulting in a significant loss of apatite resources. When the proportion of water-reclaimed material added is low, the collecting capacity of the prepared collector does not change much, but the final concentrate grade decreases significantly, affecting the concentrate sales price. Therefore, in the oxide ore collector of this invention, by partially replacing sodium oleate with water-reclaimed material and optimizing the proportion of water-reclaimed material, the collector achieves good flotation effect.

[0076] In addition to the above embodiments, the oxide mineral collector of the present invention can also be applied to the flotation of oxide minerals such as bauxite and ilmenite.

[0077] The embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. An oxidizing mineral collector, characterized in that, Includes the pharmaceutical preparation and the water required to dissolve it, wherein the pharmaceutical preparation comprises the following raw material components by weight percentage: Sodium oleate 60%–75%, sodium hydroxide 3%–5%, water-based material 20%–37%; The water-reclaimed material is the solid waste produced from the refining of p-xylene, which contains p-xylene acid and p-carboxybenzoic acid, after flocculation, sedimentation, and dewatering.

2. The oxide mineral collector according to claim 1, characterized in that, The reagent and water are prepared in a weight ratio of 1-20:80-99.

3. A method for preparing the oxide mineral collector as described in claim 1, characterized in that, Includes the following steps: Add the raw materials of the medicine to the water in the specified proportions and stir until completely dissolved. The weight ratio of the medicine to the water is 1-20:80-99.

4. The preparation method according to claim 3, characterized in that, Includes the following steps: Step S1: Add the water-removed material to the water and start stirring; Step S2: Add sodium hydroxide to water in 2-4 portions, with an interval of 5-10 minutes between each addition. After the sodium hydroxide is added, continue stirring until the water and the material are completely dissolved. Step S3: Add sodium oleate to water all at once and stir until it is completely dissolved.

5. The application of the oxide mineral collector as described in claim 1 in the flotation process of scheelite, fluorite, apatite, bauxite, and ilmenite.