CN108311293B - Carbon organic matter deposition type low-grade manganese ore flotation process - Google Patents
Carbon organic matter deposition type low-grade manganese ore flotation process Download PDFInfo
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- CN108311293B CN108311293B CN201810319982.9A CN201810319982A CN108311293B CN 108311293 B CN108311293 B CN 108311293B CN 201810319982 A CN201810319982 A CN 201810319982A CN 108311293 B CN108311293 B CN 108311293B
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- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
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- B03D1/02—Froth-flotation processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
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Abstract
The invention belongs to the technical field of manganese ore dressing and discloses a carbon organic matter deposition type low-grade manganese ore flotation process. By adopting a reverse flotation process and a forward flotation process, firstly, an anionic fatty acid collecting agent and a foaming agent diethyl phthalate are utilized for flotation decarburization and dephosphorization, the content of carbon organic matters in ore pulp is reduced, the using amount of the collecting agent is effectively reduced, the foam amount in the subsequent forward flotation process is reduced, the flotation selectivity is improved, the mechanical inclusion and the conveying difficulty of foam are avoided, the flotation process is easy to control and stabilize, the mineral separation cost is greatly reduced, and a new idea is provided for the flotation process of carbon organic matter deposition type low-grade manganese ore.
Description
Technical Field
The invention belongs to the technical field of manganese ore dressing, and particularly relates to a reverse-forward flotation process of carbon organic matter deposition type low-grade manganese ore.
Background
In modern industry, manganese and its compounds are used in various areas of the national economy. The manganese accounts for 90-95% of the most important field in the steel industry, and is mainly used as a deoxidizer and a desulfurizer in the iron making and steel making processes or used for manufacturing alloys. The rest 10-5% of manganese is used in other industrial fields, such as chemical industry (manufacturing various manganese-containing salts), light industry (for batteries, matches, printing paints, soap-making and the like), building material industry (coloring agents and discoloring agents of glass and ceramics), defense industry, electronic industry, environmental protection, agriculture and animal husbandry and the like. Manganese occupies a very important strategic position in national economy.
Most of manganese ores in China belong to lean ores and must be subjected to ore dressing treatment. However, most manganese ores are embedded in fine particles or micro-fine particles and have considerable amounts of high phosphorus ores, high iron ores and beneficial metals which are co-produced, so that great difficulty is brought to ore dressing processing. Particularly, the ore dressing of low-grade manganese ore containing a small amount of carbon organic matters and phosphorite deposition further increases the difficulty of ore dressing. The common mineral separation methods for manganese ores are mechanical separation (including washing, screening, gravity separation, strong magnetic separation, direct flotation and the like), and fire enrichment, chemical mineral separation and the like, but have certain problems to a greater or lesser extent. The existing ore dressing process for sorting and enriching the manganese ores reasonably is direct flotation, the process adopts an anionic collector to float and separate the manganese ores in alkalescent ore pulp to obtain high-grade manganese concentrate, but in the direct flotation of deposited low-grade manganese ores containing carbon organic matters and phosphorite, a large amount of anionic collector can be adsorbed due to the existence of the carbon organic matters, the using amount of the collector is multiplied, otherwise, the flotation cannot be finished; the increase of the using amount of the collecting agent can also increase the foam amount of the direct flotation, reduce the selectivity of the flotation, easily cause mechanical inclusion and difficult transportation of the foam, the flotation process is not easy to control and stabilize, and simultaneously, the mineral separation cost is greatly increased. In addition, in the flotation process, the phosphorite is enriched in the manganese concentrate, so that the content of phosphorus in the manganese concentrate is higher, and the manganese concentrate with better quality cannot be obtained by adopting the conventional direct flotation. The technical and economic problems of the existing flotation process restrict the industrialization of the deposition type low-grade manganese ore flotation process of carbon organic matters and phosphorite.
Disclosure of Invention
The invention aims to provide a simple and efficient novel flotation process for the deposited low-grade manganese ore containing carbon organic matters, aiming at the defects of the prior art, the process can obtain low-carbon and low-phosphorus manganese concentrate, and the related process is low in cost and suitable for popularization and application.
In order to achieve the purpose, the invention adopts the technical scheme that:
a carbon organic matter deposition type low-grade manganese ore flotation process is characterized in that reverse flotation, decarburization and dephosphorization and direct flotation and desilicification treatment are sequentially carried out on the carbon organic matter deposition type low-grade manganese ore to obtain manganese concentrate.
According to the scheme, the carbon organic matter deposition type low-grade manganese ore is a deposition type low-grade manganese ore containing carbon organic matters, and comprises the following chemical components: mn10.01-13.55 wt%, SiO225.35-41.05 wt%, TFe 2.30-3.84 wt%, P0.14-0.34 wt%, and carbon organic matter 0.5-5 wt%.
According to the scheme, the anti-floating decarburizing dephosphorization process comprises the following steps: adding water into carbon organic matter deposition type low-grade manganese ore, crushing and grinding to obtain ore pulp with the mass concentration of 20-40%, adding a regulator into the ore pulp to adjust the pH value to 8.5-10.5, taking water glass as an inhibitor, adding a collecting agent and a foaming agent, mixing, stirring and mixing pulp, performing flotation by using a flotation machine, obtaining a foam product which is carbon-containing tailings, and feeding the product in a tank into a direct flotation desilication process.
Furthermore, the carbon-containing tailings can be further subjected to scavenging to obtain final decarburized phosphorus tailings and middlings; the obtained middlings can be returned to the previous stage for re-selection in sequence.
According to the scheme, the positive flotation desilication process comprises the following steps: carrying out positive flotation in a flotation machine by adopting an anionic fatty acid collecting agent, wherein the flotation process comprises the steps of carrying out rough concentration for 1-3 times and scavenging for 1-2 times in sequence, returning middlings to the previous operation for recleaning, and finally, selecting to obtain a foam product which is manganese concentrate, and finally, scavenging to obtain a product in a cell which is tailing.
According to the scheme, the addition amount of the water glass relative to the raw ore in the anti-floating, decarburization and dephosphorization process is 1.5-4.5kg/t, the ratio of the addition amount of the collecting agent to the raw ore is 0.3-0.6kg/t, and the addition amount of the foaming agent relative to the addition amount of the raw ore is 0.3-0.6 kg/t.
According to the scheme, in the anti-floating decarburizing and dephosphorizing process, the collecting agent is an anionic fatty acid collecting agent, and the foaming agent is diethyl phthalate.
According to the scheme, the addition amount of sodium carbonate relative to raw ore in the anti-floating decarburization dephosphorization process is 3.0-6.0kg/t, and the pH value is adjusted to 8.5-10.5.
According to the scheme, only the anionic fatty acid collecting agent is added in the positive flotation desilication process, and other reagents are not added; wherein the addition amount of the collecting agent in the roughing step relative to the raw ore is 1.0-2.5kg/t, the addition amount of the scavenging collecting agent relative to the raw ore is 0.3-0.6kg/t, and no medicament is added in the concentrating step.
According to the scheme, the grain size requirement of the water-adding crushing powder is 70-85% of the content of-0.074 mm.
According to the scheme, the flotation, decarburization and dephosphorization process for the carbon organic matter deposition type low-grade manganese ore is one-step decarburization and dephosphorization reverse flotation.
According to the scheme, the direct flotation desilication process also comprises the steps of carrying out 1-3 times of direct flotation concentration on the foam products obtained by roughing, carrying out 1-2 times of scavenging on the products in the tank obtained by roughing, and returning middlings obtained in the concentration and scavenging steps to the previous stage for recleaning.
Compared with the prior art, the invention has the beneficial effects that:
1) the characteristic that various minerals in the deposited low-grade manganese ore containing carbon organic matters can be floated in ore pulp with different medium properties is fully utilized, and gangue minerals are effectively separated; firstly, organic carbon and phosphorite substances in weakly alkaline medium ore pulp have good floatability, and an anionic fatty acid collecting agent and a foaming agent diethyl phthalate are synchronously floated to remove carbon organic matters and phosphorite gangue; in the alkaline ore pulp, the floatability of silicate minerals is poor, the silicate minerals are easy to be inhibited and removed, and the silicate minerals are subjected to direct flotation desilicication treatment, so that the grade of manganese ore of a foam product is improved.
2) The invention adopts a reverse-positive flotation process aiming at the deposition type low-grade manganese ore containing carbon organic matters, firstly utilizes anionic fatty acid collecting agent and foaming agent diethyl phthalate for flotation, decarbonization and dephosphorization, reduces the content of the carbon organic matters in ore pulp, effectively reduces the using amount of the collecting agent, reduces the positive flotation foam amount, improves the flotation selectivity, avoids mechanical inclusion and difficult transportation of foam, ensures that the flotation process is easy to control and stabilize, and greatly reduces the beneficiation cost.
3) The process successfully realizes the beneficiation and enrichment of the deposited low-grade manganese ore containing the carbon organic matters, and can improve the utilization rate of manganese resources; the problem that the existing flotation process cannot be applied to the deposition type low-grade manganese ore dressing with higher carbon organic matter content is solved; compared with the raw ore, the method can effectively reduce the content of harmful impurities such as iron, phosphorus, silicon, carbon and the like in the manganese concentrate finished product.
Drawings
Fig. 1 is a schematic flow chart of a direct-reverse flotation open circuit test performed by the deposition type low-grade manganese ore flotation process containing carbon organic matters in example 1.
Fig. 2 is a schematic flow chart of a direct-reverse flotation open circuit test performed by the deposition type low-grade manganese ore flotation process containing carbon organic matters in example 2.
Fig. 3 is a schematic flow chart of the forward and reverse flotation open circuit test performed by the deposition type low-grade manganese ore flotation process containing carbon organic matters in example 3.
Fig. 4 is a schematic flow chart of a closed circuit test of the forward and reverse flotation of the deposition type low-grade manganese ore flotation process containing carbon organic matters in example 4.
Fig. 5 is a schematic flow chart of a direct flotation desilication closed-circuit test only performed on the deposition type low-grade manganese ore flotation process containing carbon organic matters in the comparative example.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
In the following examples, the carbon organic matter deposited low-grade manganese ore used comprises the following chemical components: mn10.01-13.55 wt%, SiO225.35-41.05 wt%, TFe 2.30-3.84 wt%, P0.14-0.34 wt%, and carbon organic matter 0.5-5 wt%.
The anti-floating decarburizing dephosphorization process comprises the following steps: adding water into carbon organic matter deposition type low-grade manganese ore, crushing and grinding (the granularity is required to be-0.074 mm, and the content accounts for 70-85%) to obtain ore pulp with the mass concentration of 20-40%, adding an adjusting agent (sodium carbonate) into the ore pulp to adjust the pH value to 8.5-10.5, adding an inhibitor, a collecting agent and a foaming agent, stirring and mixing the pulp, performing flotation by using a flotation machine, wherein the obtained foam product is carbon-containing tailings, and feeding a product in a tank into a positive flotation desilicication process; in the reverse flotation decarburizing and dephosphorizing process, the collector is an anionic fatty acid collector, and the foaming agent is diethyl phthalate; wherein the addition amount of the sodium carbonate relative to the raw ore is 3.0-6.0kg/t, the addition amount of the sodium silicate relative to the raw ore is 1.5-4.5kg/t, the addition amount of the collecting agent relative to the raw ore is 0.3-0.6kg/t, and the addition amount of the foaming agent relative to the raw ore is 0.3-0.6 kg/t.
The direct flotation desilication process comprises the following steps: carrying out direct flotation roughing on products in a cell obtained by reverse flotation in a flotation machine by adopting an anionic fatty acid collecting agent, and carrying out 1-3 times of fine selection operation on the obtained foam products and carrying out 1-2 times of scavenging operation on the products in the cell; the middlings can be sequentially returned to the previous operation for re-concentration, the foam product obtained by final concentration is manganese concentrate, and the product in the scavenging tank is tailings. Wherein the addition amount of the rough concentration anionic fatty acid collecting agent relative to the raw ore is 1.0-2.5 kg/t; the addition amount of the anionic fatty acid collecting agent for the first scavenging relative to the raw ore is 0.3-0.6 kg/t; the addition amount of the anionic fatty acid collecting agent in the second scavenging relative to the raw ore is 0.1-0.3 kg/t; no medicament is added in the selection step.
Example 1
A carbon organic matter deposition type low-grade manganese ore flotation process adopts ore raw materials comprising: mn10.01wt%, SiO241.05 wt%, TFe 3.84 wt%, P0.34 wt%, and carbonaceous organic matter 5.0 wt%; the specific flotation process comprises the following steps:
1) adding water into carbon organic matter deposition type low-grade manganese ore, crushing and grinding (-0.074mm content: 77.8%) to obtain ore pulp with the mass concentration of 20%, adding sodium carbonate into the ore pulp to adjust the pH value to 10.5, then adding water glass, an anionic fatty acid collecting agent (MO-135) and diethyl phthalate, stirring and mixing pulp, performing flotation, decarbonization and rough separation by using a flotation machine, wherein the obtained foam product is carbon-containing and phosphorus-containing tailings (decarbonized tailings), and feeding a product in a tank into a positive flotation desilication process; wherein the addition amount of sodium carbonate relative to raw ore is 6.0kg/t, the addition amount of sodium silicate relative to raw ore is 4.5g/t, the addition amount of collecting agent (MO-135) relative to raw ore is 0.6kg/t, and the addition amount of foaming agent raw ore is 0.6 kg/t;
2) directly adding a collecting agent (MO-135) into the product in the tank obtained in the step 1) for desilication direct flotation roughing, and performing 2 times of fine selection operation and 1 time of scavenging operation on the product in the tank; finally, the foam product obtained by fine concentration is manganese concentrate, and the final scavenged product in the tank is tailings; wherein the addition amount of the collecting agent (MO-135) in the rough concentration relative to the raw ore is 1.0 kg/t; the addition amount of the collecting agent (MO-135) relative to the raw ore in the scavenging step is 0.3 kg/t; no medicament is added in the fine selection step;
3) and concentrating, filtering and drying the obtained manganese concentrate to obtain a manganese concentrate finished product.
The results show that: the manganese content of the finished manganese concentrate product obtained in the embodiment is 18.91% by mass, and the recovery rate is 69.21%; the mass percentage of Fe in the manganese concentrate finished product is 0.85 percent, and the mass percentage of SiO in the manganese concentrate finished product is2The mass percentage of the P is 13.34 percent, the mass percentage of the P is 0.052 percent, and the mass percentage of the carbon organic matter is 1.16 percent.
Example 2
A carbon organic matter deposition type low-grade manganese ore flotation process adopts ore raw materials comprising: mn13.55wt%, SiO225.35 wt%, TFe 2.30 wt%, P0.14 wt%, and carbonaceous organic matter 3.5 wt%; the specific flotation process comprises the following steps:
1) adding water into carbon organic matter deposition type low-grade manganese ore, crushing and grinding (-0.074mm content, 85.0%) to obtain ore pulp with the mass concentration of 30%, adding sodium carbonate into the ore pulp to adjust the pH value to 8.5, then adding water glass, an anionic fatty acid collecting agent (MO-135) and diethyl phthalate, stirring and mixing the pulp, performing flotation, decarbonization and roughing (3min) by using a flotation machine, wherein the obtained foam product is carbon-containing and phosphorus-containing tailings, scavenging the product again, wherein the product in a scavenging tank is middling, the middling returns to the previous operation, and the scavenged foam product is decarburized phosphorus tailings; the products in the tank obtained by the decarburization and roughing enter a positive flotation desilication process; wherein the addition amount of sodium carbonate relative to raw ore is 3.0kg/t, the addition amount of sodium silicate relative to raw ore is 1.5g/t, the addition amount of collecting agent (MO-135) relative to raw ore is 0.45kg/t, and the addition amount of foaming agent relative to raw ore is 0.45 kg/t;
2) carrying out desiliconization positive flotation roughing (4min) on the product in the cell obtained in the step 1) in a flotation machine by adopting a collecting agent (MO-135), and carrying out fine flotation (3min) on the obtained foam product and scavenging (3min) on the product in the cell for 2 times; finally, the foam product obtained by fine concentration is manganese concentrate, and the final scavenged product in the tank is tailings; wherein the addition amount of the collecting agent (MO-135) relative to the raw ore in the roughing step is 2.5 kg/t; the addition amount of the collector (MO-135) relative to the raw ore in the first scavenging step is 0.6kg/t, and the addition amount of the collector (MO-135) relative to the raw ore in the second scavenging step is 0.3 kg/t; no medicament is added in the selection step.
3) And concentrating, filtering and drying the obtained manganese concentrate to obtain a manganese concentrate finished product.
The results show that: the manganese content of the finished manganese concentrate product obtained in the embodiment is 19.18% by mass, and the recovery rate is 80.60%; TFe accounts for 0.43 percent and SiO accounts for2The mass percentage of the P is 10.04 percent, the mass percentage of the P is 0.034 percent, and the mass percentage of the carbon organic matter is 0.86 percent.
Example 3
A carbon organic matter deposition type low-grade manganese ore flotation process adopts ore raw materials comprising: mn12.35wt%, SiO233.12 wt%, TFe 2.81 wt%, P0.25 wt%, and carbon organic matter 0.5 wt%; the specific flotation process comprises the following steps:
1) adding water into carbon organic matter deposition type low-grade manganese ore, crushing and grinding (-0.074mm content: 70.0%) to obtain ore pulp with the mass concentration of 40%, adding sodium carbonate into the ore pulp to adjust the pH value to 9.5, then adding water glass, an anionic fatty acid collecting agent (MO-135) and diethyl phthalate, stirring and mixing pulp, performing flotation, decarbonization and rough concentration by using a flotation machine to obtain a foam product, namely, carbon-containing and phosphorus-containing tailings, performing scavenging on the foam product again, wherein the product in a tank obtained by scavenging is middling, returning the middling to the previous operation, and the foam product obtained by scavenging is decarburized phosphorus tailings; the products in the tank obtained by the decarburization and roughing enter a positive flotation desilication process; wherein the addition amount of sodium carbonate relative to raw ore is 4.5kg/t, the addition amount of sodium silicate relative to raw ore is 3.0g/t, the addition amount of collecting agent (MO-135) relative to raw ore is 0.3kg/t, and the addition amount of foaming agent relative to raw ore is 0.3 kg/t;
2) carrying out desilication positive flotation roughing on the product in the tank obtained in the step 1) in a flotation machine by adopting a collecting agent (MO-135), and carrying out 1-time fine flotation operation on the obtained foam product and 2-time scavenging operation on the product in the tank; finally, the foam product obtained by fine concentration is manganese concentrate, and the final scavenged product in the tank is tailings; wherein the addition amount of the collecting agent (MO-135) relative to the raw ore in the roughing step is 1.8 kg/t; the addition amount of the fatty acid collector (MO-135) relative to the raw ore in the first scavenging step is 0.45kg/t, and the addition amount of the collector (MO-135) relative to the raw ore in the second scavenging step is 0.1 kg/t; no medicament is added in the selection step.
3) And concentrating, filtering and drying the obtained manganese concentrate to obtain a manganese concentrate finished product.
The results show that: the manganese content of the finished manganese concentrate product obtained in the embodiment is 18.24% by mass, and the recovery rate is 80.12%; TFe accounts for 0.63 percent and SiO accounts for29.81 percent of P, 0.043 percent of P and 0.18 percent of carbon organic matter.
Example 4
A carbon organic matter deposition type low-grade manganese ore flotation process adopts ore raw materials comprising: mn11.22wt%, SiO228.05 wt%, TFe 3.51 wt%, P0.35 wt%, and carbonaceous organic matter 3.6 wt%; the specific flotation process comprises the following steps:
1) adding water into carbon organic matter deposition type low-grade manganese ore, crushing and grinding (-77.0 mm content in 0.074 mm) to obtain ore pulp with the mass concentration of 25%, adding sodium carbonate into the ore pulp to adjust the pH value to 10, then adding water glass, an anionic fatty acid collecting agent (MO-135) and diethyl phthalate, stirring and mixing pulp, performing flotation, decarbonization and rough concentration by using a flotation machine, wherein the obtained foam product is carbon-containing and phosphorus-containing tailings, performing scavenging on the product again, wherein the product in a tank obtained by scavenging is middling, the middling returns to the previous operation, and the foam product obtained by scavenging is decarburized phosphorus tailings; the products in the tank obtained by the decarburization and roughing enter a positive flotation desilication process; wherein the addition amount of sodium carbonate relative to raw ore is 4.5kg/t, the addition amount of sodium silicate relative to raw ore is 4.5g/t, the addition amount of collecting agent (MO-135) relative to raw ore is 0.6kg/t, and the addition amount of foaming agent relative to raw ore is 0.42 kg/t;
2) carrying out desilication positive flotation roughing on the product in the tank obtained in the step 1) in a flotation machine by adopting a collecting agent (MO-135), and carrying out 2 times of fine selection operation on the obtained foam product and 1 time of scavenging operation on the product in the tank; finally, the foam product obtained by fine concentration is manganese concentrate, and the final scavenged product in the tank is tailings; wherein the addition amount of the collecting agent (MO-135) relative to the raw ore in the roughing step is 1.2 kg/t; the addition amount of the collecting agent (MO-135) relative to the raw ore in the scavenging step is 0.6 kg/t; no medicament is added in the selection step.
3) And (4) concentrating, filtering and drying the obtained manganese concentrate to obtain a manganese concentrate finished product through a closed-loop test of sequentially returning middlings for a plurality of times.
The results show that: the manganese content of the finished manganese concentrate product obtained in the embodiment is 17.03% by mass, the recovery rate is 80.12%, and the yield is 52.97%; TFe accounts for 0.58 percent and SiO accounts for2The mass percentage of the P is 10.31 percent, the mass percentage of the P is 0.047 percent, and the mass percentage of the carbon organic matter is 0.24 percent.
Comparative example
A carbon organic matter deposition type low-grade manganese ore flotation process adopts ore raw materials comprising: mn13.42wt%, SiO230.06 wt%, TFe 2.93 wt%, P0.29 wt%, and carbon organic matter 4.4 wt%; the specific flotation process comprises the following steps:
1) adding water into carbon organic matter deposition type low-grade manganese ore, crushing and grinding (-80.0% of content of 0.074 mm) to obtain ore pulp with mass concentration of 25%, adding sodium carbonate into the ore pulp to adjust the pH value to 10, then adding water glass and an anionic fatty acid collecting agent (MO-135), stirring and mixing the pulp, and performing flotation desilicication roughing by using a flotation machine; wherein the addition amount of the sodium carbonate relative to the raw ore is 5.0kg/t, the addition amount of the sodium silicate relative to the raw ore is 4.5g/t, and the addition amount of the collecting agent (MO-135) relative to the raw ore is 2.0 kg/t;
2) carrying out desilication direct flotation on the product in the tank obtained in the step 1) in a flotation machine by adopting a collecting agent (MO-135) for 2 times of fine selection operation and 1 time of scavenging operation; finally, the foam product obtained by fine concentration is manganese concentrate, and the final scavenged product in the tank is tailings; wherein the addition amount of the collector (MO-135) relative to the raw ore in the scavenging step is 0.6 kg/t; no medicament is added in the selection step.
3) And (4) concentrating, filtering and drying the obtained manganese concentrate to obtain a manganese concentrate finished product through a closed-loop test of sequentially returning middlings for a plurality of times.
The results show that: the manganese content of the finished manganese concentrate product obtained in the embodiment is 15.37% by mass, the recovery rate is 72.36%, and the yield is 63.18%; the TFe content in the concentrate is 1.35 percent by mass, and the SiO content in the concentrate2The mass percentage of the P is 15.13 percent, the mass percentage of the P is 0.34 percent, and the mass percentage of the carbon organic matter is 3.81 percent.
The above results show that: when the flotation operation is directly carried out on the carbon organic matter deposition type grade manganese ore, the problems of large using amount of flotation reagents, low recovery rate, low grade of concentrate and the like (the grade of the concentrate is only 15.37 percent, the phosphorus content reaches 0.34 percent and the carbon organic matter content is 3.81 percent) exist, and the invention combines a reverse flotation decarburization dephosphorization process and a forward flotation desilication process, can effectively improve the grade and the recovery efficiency of the concentrate, further reduces the content of harmful impurities such as iron, phosphorus, silicon, carbon and the like in a manganese concentrate finished product, and provides a new idea for the flotation process of the carbon organic matter deposition type low grade manganese ore.
It is apparent that the above embodiments are only examples for clearly illustrating and do not limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are therefore intended to be included within the scope of the invention as claimed.
Claims (7)
1. A carbon organic matter deposition type low-grade manganese ore flotation process comprises the steps of sequentially carrying out reverse flotation, decarburization and dephosphorization and direct flotation and desilicification on carbon organic matter deposition type low-grade manganese ore to obtain manganese concentrate;
the anti-floating decarburization dephosphorization process comprises the following steps: adding water into carbon organic matter deposition type low-grade manganese ore, crushing and grinding to obtain ore pulp with the mass concentration of 20-40%, adding a regulator into the ore pulp to adjust the pH value to 8.5-10.5, adding water glass, an anionic fatty acid collecting agent and diethyl phthalate, stirring and mixing the pulp, performing flotation by using a flotation machine, obtaining a foam product which is carbon-containing tailings, and feeding the product in a tank into a direct flotation desilication process.
2. The flotation process for carbon organic matter deposited low-grade manganese ore according to claim 1, wherein the chemical composition of the carbon organic matter deposited low-grade manganese ore comprises: mn10.01-13.55 wt%, SiO225.35-41.05 wt%, TFe 2.30-3.84 wt%, P0.14-0.34 wt%, and carbon organic matter 0.5-5 wt%.
3. The flotation process for carbon organic matter deposition type low-grade manganese ore according to claim 1, wherein the grain size of the water-adding crushing powder is 70-85% of the grain size of-0.074 mm.
4. The carbon organic matter deposition type low-grade manganese ore flotation process according to claim 1, wherein the addition amount of the water glass to the raw ore is 1.5-4.5kg/t, the addition amount of the collecting agent to the raw ore is 0.3-0.6kg/t, and the addition amount of the foaming agent to the raw ore is 0.3-0.6 kg/t.
5. The carbon organic matter deposition type low-grade manganese ore flotation process according to claim 1, wherein the forward flotation desilication process comprises: carrying out positive flotation in a flotation machine by adopting an anionic fatty acid collecting agent, wherein the flotation process comprises 1 roughing, 1-3 concentrating and 1-2 scavenging operations in sequence, finally, the foam product obtained by concentrating is manganese concentrate, and the product in the tank subjected to scavenging is tailings.
6. The carbon organic matter deposition type low-grade manganese ore flotation process according to claim 5, wherein the collector is an anionic fatty acid collector, and the foaming agent is diethyl phthalate.
7. The carbon organic matter deposition type low-grade manganese ore flotation process according to claim 5, wherein the addition amount of a collecting agent to raw ores in the roughing step is 1.0-2.5kg/t, the addition amount of the collecting agent to raw ores in the scavenging step is 0.3-0.6kg/t, and no chemical agent is added in the concentration step.
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