阅读说明：本技术 一种重晶石浮选剂及浮选的方法 (Barite flotation agent and flotation method ) 是由 林福平 于 2020-12-31 设计创作，主要内容包括：一种重晶石浮选剂及浮选的方法,重晶石浮选剂包括调整剂、抑制剂、捕收剂；抑制剂为水玻璃,抑制剂至少分三次加入,第一次加入的抑制剂重量为抑制剂总量的65%-75%,第二次加入的抑制剂重量为抑制剂总量的15%-30%,第三次加入抑制剂重量为抑制剂总量的5%-10%,的所述捕收剂重量为所述第一加入的抑制剂重量的60-85%；调整剂调整所述重晶石浮选剂初分选体系的pH值为6.2-6.5;浮选方法包括重晶石浮选剂初分选体系中抑制剂、捕收剂先混合后加入浮选槽,测定浮选槽内pH值、并用调整剂调节浮选槽内混合物pH值至6.2-6.5,重晶石粉也加入浮选槽。本发明的优点是,采用现有浮洗药剂通过三次浮选,就中要实现开路试验条件下重晶石精矿品位95.05%以上、回收率为87.89%以上。(A barite flotation agent and a flotation method thereof, wherein the barite flotation agent comprises a regulator, an inhibitor and a collector; the inhibitor is water glass, the inhibitor is added in at least three times, the weight of the inhibitor added for the first time is 65-75% of the total weight of the inhibitor, the weight of the inhibitor added for the second time is 15-30% of the total weight of the inhibitor, the weight of the inhibitor added for the third time is 5-10% of the total weight of the inhibitor, and the weight of the collecting agent is 60-85% of the weight of the inhibitor added for the first time; the flotation method comprises the steps of firstly mixing an inhibitor and a collecting agent in the primary separation system of the barite flotation agent and then adding the mixture into a flotation tank, measuring the pH value in the flotation tank, regulating the pH value of the mixture in the flotation tank to 6.2-6.5 by using the regulator, and adding barite powder into the flotation tank. The method has the advantages that the existing flotation reagent is adopted to realize the barite concentrate grade of over 95.05% and the recovery rate of over 87.89% under the open circuit test condition through three times of flotation.)

1. A barite flotation agent is characterized in that: the barite flotation agent comprises a regulator, an inhibitor and a collector;

the inhibitor is water glass, the inhibitor is added in at least three times, the weight of the inhibitor added for the first time is 65-75% of the total weight of the inhibitor, the weight of the inhibitor added for the second time is 15-30% of the total weight of the inhibitor, the weight of the inhibitor added for the third time is 5-10% of the total weight of the inhibitor, and the weight of the collecting agent is 60-85% of the weight of the inhibitor added for the first time;

the regulator, the collecting agent and the inhibitor added for the first time form a primary separation system of the barite flotation agent, and the regulator regulates the pH value of the primary separation system of the barite flotation agent to be 6.2-6.5.

2. A barite flotation agent as claimed in claim 1, wherein: the regulator is sulfuric acid or sodium carbonate.

3. A barite flotation agent as claimed in claim 1, wherein: the collector is a mixture of light diesel oil and C6-8 fusel.

4. A barite flotation agent as claimed in claim 1, wherein: the barite flotation agent also comprises a supplementary regulator, the supplementary regulator and the inhibitor added for the second time are added into the primary separation system of the barite flotation agent together to form a primary separation system of the barite flotation agent, and the supplementary regulator regulates the pH value of the primary separation system of the barite flotation agent to be 6.7-6.8.

5. A method of flotation using a barite flotation agent as claimed in any one of claims 1 to 4, characterised in that: the flotation method comprises the steps of firstly mixing an inhibitor and a collecting agent in a primary separation system of the barite flotation agent, then adding the mixture into a flotation tank, measuring the pH value in the flotation tank, adjusting the pH value of the mixture in the flotation tank to 6.2-6.5 by using an adjusting agent, and adding the barite powder into the flotation tank.

6. The flotation process according to claim 5, wherein: the circulating pump is connected with the lower end and the upper end of the flotation tank through the inflow pipe and the outflow pipe respectively, the circulating pump enables the barite flotation agent in the flotation tank to realize liquid circulation from bottom to top, the liquid circulation speed is repeated periodically from a maximum value to a first small value to static value to a second small value, the period of the maximum value of the liquid circulation speed is the period of adding barite into the flotation tank, the period of the first small value of the liquid circulation speed is the period of separating barite into the flotation tank, the period of the static value of the liquid circulation speed is the period of adding inhibitor and collecting agent into the flotation tank, and the period of the second small value of the liquid circulation speed is the period of adding regulating agent into the flotation tank.

7. The flotation process according to claim 6, wherein: the maximum value of the liquid circulation speed is positively correlated with the specific gravity of the liquid in the flotation tank.

8. The flotation process according to claim 6, wherein: the first small value of the liquid circulation speed is smaller than the second small value of the liquid circulation speed.

9. The flotation process according to claim 5, wherein: the liquid circulation speed first small value period is divided into a rough concentration first small value period, a first fine concentration first small value period and a final fine concentration first small value period, the speed of the rough concentration first small value period is greater than that of the first fine concentration first small value period, and the first fine concentration first small value period is greater than that of the final fine concentration first small value period.

10. The flotation process according to claim 9, wherein: adding inhibitor for a second time during said second minimum of initial concentration;

adding inhibitor for a third time during said second minimum of final concentration;

the addition of depressants to the flotation cell during periods of static liquid circulation velocity is the first addition of depressants.

Technical Field

The invention relates to a barite flotation agent and a flotation method, in particular to a quartz-calcite-barite flotation agent and a flotation method.

Background

The quartz-calcite-barite ore has complex composition, and besides quartz and calcite-based gangue minerals, clay minerals and metal ion minerals can be symbiotically generated in the ore, and the existence of the clay minerals and the metal ion minerals makes the floatation of the barite extremely difficult. The flotation behaviors of the barite and the gangue minerals are extremely similar, the selection of the medicament is extremely difficult, the simple flotation process cannot meet the requirement of the ore, and more fine concentration is needed to obtain more ideal indexes.

Disclosure of Invention

The invention provides a barite flotation agent and a flotation method, which adopt the existing flotation agent to realize the barite concentrate grade of more than 95.05% and the recovery rate of more than 87.89% under the condition of an open circuit test through three times of flotation.

The technical scheme for realizing the aim of the invention is that the barite flotation agent comprises a regulator, an inhibitor and a collector;

the inhibitor is water glass, the inhibitor is added in at least three times, the weight of the inhibitor added for the first time is 65-75% of the total weight of the inhibitor, the weight of the inhibitor added for the second time is 15-30% of the total weight of the inhibitor, the weight of the inhibitor added for the third time is 5-10% of the total weight of the inhibitor, and the weight of the collecting agent is 60-85% of the weight of the inhibitor added for the first time;

the regulator, the collecting agent and the inhibitor added for the first time form a primary separation system of the barite flotation agent, and the regulator regulates the pH value of the primary separation system of the barite flotation agent to be 6.2-6.5.

Further, the regulator is sulfuric acid or sodium carbonate.

Further, the collector is a mixture of light diesel oil and C6-8 fusel. .

The barite flotation agent further comprises a supplementary regulator, the supplementary regulator and the inhibitor added for the second time are added into the primary barite flotation agent separation system together to form a barite flotation agent separation system, and the supplementary regulator regulates the pH value of the separation system in the barite flotation agent to be 6.7-6.8.

The method for carrying out flotation by utilizing the barite flotation agent comprises the steps of firstly mixing an inhibitor and a collecting agent in a primary separation system of the barite flotation agent, then adding the mixture into a flotation tank, measuring the pH value in the flotation tank, adjusting the pH value of the mixture in the flotation tank to 6.2-6.5 by using an adjusting agent, and adding barite powder into the flotation tank.

Preferably, the circulating pump is connected to the lower end and the upper end of the flotation tank through the inflow pipe and the outflow pipe respectively, the circulating pump enables the barite flotation agent in the flotation tank to realize liquid circulation from bottom to top, the liquid circulation speed is periodically repeated from a maximum value to a first small value to static value to a second small value, the period of the maximum liquid circulation speed is the period of adding the barite into the flotation tank, the period of the first small value of the liquid circulation speed is the period of separating the barite into the flotation tank, the period of the static liquid circulation speed is the period of adding the inhibitor and the collector into the flotation tank, and the period of the second small value of the liquid circulation speed is the period of adding the regulator into the flotation tank.

Preferably, the maximum liquid circulation speed is positively correlated with the specific gravity of the liquid in the flotation cell.

Preferably, the first minimum value of the liquid circulation rate is smaller than the second minimum value of the liquid circulation rate.

Preferably, the first small value period of the liquid circulation speed is divided into a first small value period of rough concentration, a first small value period of initial concentration and a first small value period of final concentration, the speed of the first small value period of rough concentration is greater than the speed of the first small value period of initial concentration, and the first small value period of initial concentration is greater than the first small value period of final concentration.

Preferably, the inhibitor is added for the second time during the first small value of the initial concentration;

adding inhibitor for a third time during said first minimum of final concentration;

the addition of depressants to the flotation cell during periods of static liquid circulation velocity is the first addition of depressants.

The invention has the advantages that 1) the recovery efficiency is high, the fine ore level is improved by more than 5 percent compared with the prior quartz-calcite-barite ore flotation technology, and the recovery rate reaches 87.89 percent;

2) the invention aims at achieving the invention only by adding a flotation agent and improving the method without changing the existing flotation system, does not need to greatly increase the production cost, and is more convenient to use;

3) the principle of the invention lies in that the separation purpose is achieved by utilizing the principle that barite and calcite are negatively charged in flotation and two minerals are in a dispersed state according to the principle that like charges repel each other, and the separation effect is more obvious by controlling the circulation speed.

Drawings

Fig. 1 shows a barite flotation process.

Fig. 2 is a table showing the PH value comparison of barite flotation for the test under test condition a.

Fig. 3 is a graph showing the results of the barite flotation PH value comparison test under test condition a.

Fig. 4 is a table showing the PH value comparison of barite flotation for the test under test condition B.

Fig. 5 is a graph showing the results of the barite flotation PH value comparison test under test condition B.

Fig. 6 shows a preferable flow path of barite flotation.

FIG. 7 is a table showing the addition and non-addition of supplemental conditioning agents during the initial beneficiation.

FIG. 8 is a table showing the chemical analysis results of the main components of calcite, quartz and fluorite as gangue minerals.

Fig. 9 is a schematic diagram of a barite flotation method.

Fig. 10 is a schematic diagram of the connection of the flotation tank and the circulating pump.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

In the process of barite flotation, as shown in fig. 1, the flotation is completed by performing rough concentration, primary concentration and final concentration on raw ores, and the barite flotation agent comprises a regulator, an inhibitor and a collector, preferably, the regulator is sulfuric acid or sodium carbonate, and the collector is a mixture of light diesel oil and C6-8 fusel. (ii) a

The inhibitor is water glass, the inhibitor is added in three times, the weight of the inhibitor added for the first time (rough concentration) is 65-75% of the total weight of the inhibitor, the weight of the inhibitor added for the second time (initial concentration) is 15-30% of the total weight of the inhibitor, the weight of the inhibitor added for the third time (final concentration) is 5-10% of the total weight of the inhibitor, and the weight of the collector is 60-85% of the weight of the inhibitor added for the first time;

the regulator, the collecting agent and the inhibitor added for the first time form a primary separation system of the barite flotation agent, the regulator regulates the pH value of the primary separation system of the barite flotation agent to be 6.2-6.5, and according to the prior art, the pH value of the primary separation system of the barite flotation agent is only required to be greater than 6, but multiple tests show that the flotation effect is the best when the pH value is 6.2-6.5;

test conditions A: controlling the dosage of the collecting agent and the inhibitor, adding a pH regulator to adjust the pH value of the ore pulp for testing, wherein the regulator respectively adopts sulfuric acid and sodium carbonate solution, the dosage of the fixed collecting agent is 500g/t, the inhibitor water glass is roughly selected at 800g/t, the initial concentration is 200g/t, and the final concentration is 100g/t, the test result is shown in figure 2, as shown in figure 3, the grade of BaSO4 of the concentrate is increased firstly and then slowly reduced, and the recovery rate of the concentrate is gradually increased. Considering the comprehensive grade and recovery rate, the best effect is achieved when the pH is =6.4, the BaSO4 grade of the concentrate is 95.04% at the highest, and the recovery rate is 76.98%.

Test conditions B: controlling the use amounts of a collecting agent and an inhibitor, adding a pH regulator to adjust the pH value of ore pulp for a test, wherein the regulator respectively adopts sulfuric acid and a sodium carbonate solution, the use amount of the fixed collecting agent is 650g/t, the inhibitor sodium silicate is roughed for 900g/t, the initial concentration is 220g/t, and the final concentration is 80g/t, the test result is shown in figure 4, as shown in figure 5, the BaSO4 grade of the ore concentrate approximately rises and stabilizes along with the increase of the pH, the recovery rate of the ore concentrate continuously drops, the comprehensive grade and the recovery rate are considered, when the pH =6.2, the test result is the best, the grade of the ore concentrate is BaSO495.74%, and the recovery rate is 87.14.

As shown in fig. 6, the barite flotation agent further comprises a supplementary adjusting agent, the supplementary adjusting agent is added into the primary separation system of the barite flotation agent together with the second added inhibitor to form a secondary separation system of the barite flotation agent, and the supplementary adjusting agent adjusts the pH value of the secondary separation system of the barite flotation agent to 6.7-6.8;

and (C) controlling the using amounts of the collecting agent and the inhibitor, wherein the adjusting agent respectively adopts sulfuric acid and a sodium carbonate solution, the using amount of the fixed collecting agent is 650g/t, the coarse concentration of the inhibitor water glass is 900g/t, the initial concentration is 220g/t, the final concentration is 80g/t, the pH value during the coarse concentration is =6.2, and a supplementary pH adjusting agent is added during the initial concentration to adjust the pH value of the ore pulp for testing or not adjusting, as shown in figure 7, the yield of the obviously added supplementary adjusting agent is higher than that of the non-added supplementary adjusting agent, the grade of the non-added supplementary adjusting agent is lower than that of the added supplementary adjusting agent, and the comprehensive consideration of adding the supplementary adjusting.

As shown in fig. 9 and 10, the flotation method includes mixing an inhibitor and a collector in a primary separation system of a barite flotation agent, adding the mixture into a flotation tank, measuring the pH value in the flotation tank, adjusting the pH value of the mixture in the flotation tank to 6.2-6.5 by using an adjusting agent, adding barite powder into the flotation tank, equivalently roughing, wherein the raw ore of the test is acidified Yichang barite flotation concentrate with a proportion of-200 meshes to 99.91%, a proportion of-325 meshes to 87.87%, and a proportion of-400 meshes to 76.22%. The grade of BaSO4 is as high as 90.63%, the main gangue minerals are calcite, quartz and fluorite, and the chemical analysis results of the main components are shown in figure 8;

the circulating pump is respectively connected with the lower end and the upper end of the flotation tank through the inflow pipe and the outflow pipe, the circulating pump enables the barite flotation agent in the flotation tank to realize liquid circulation from bottom to top, the liquid circulation speed is periodically repeated and optimized from the maximum value-the first small value-the rest-the second small value, the first small value of the liquid circulation speed is smaller than the second small value of the liquid circulation speed, the period of the maximum value of the liquid circulation speed is the period of adding the barite into the flotation tank, the period of the first small value of the liquid circulation speed is the period of separating the barite into the flotation tank, the period of the static liquid circulation speed is the period of adding the inhibitor and the collector into the flotation tank, the period of the second small value of the liquid circulation speed is the period of adding the regulator into the flotation tank, and the optimization is carried out, said maximum value of the liquid circulation rate is positively correlated with the specific gravity of the flotation cell liquid, preferably, the second addition of depressants takes place during said second minimum value of the initial concentration;

adding inhibitor for a third time during said second minimum of final concentration;

the addition of depressants to the flotation cell during periods of static liquid circulation velocity is the first addition of depressants.

Preferably, the period of the first small value of the liquid circulation speed is divided into a period of the second small value of the rough concentration, a period of the first small value of the initial concentration and a period of the first small value of the final concentration, the speed of the first small value of the rough concentration is greater than the speed of the first small value of the initial concentration, and the period of the first small value of the initial concentration is greater than the period of the first small value of the final concentration.

In a comparative test, it is found that under the same conditions, F1\ F2\ F3 and F1 are static flotation (i.e. circulation is not adopted) BaSO495.74 percent, the recovery rate is 87.14 percent, F2 is circulated but is not changed (speed change is not adopted during the first small value of the liquid circulation speed) BaSO495.84 percent, the recovery rate is 87.26 percent, F3 is circulated and is changed simultaneously (speed change is adopted during the first small value of the liquid circulation speed) BaSO495.74 percent, the recovery rate is 92.16 percent, the recovery rate can be greatly improved only by changing the circulation speed, and the grade is hardly reduced.