Method for optimizing blowing process for double-furnace continuous copper smelting process

Abstract

The invention relates to the technical field of copper smelting pyrometallurgy, in particular to a method for optimizing the blowing process for a double-furnace continuous copper smelting process. The method comprises the following steps: converting Cu, Fe and S into CuS and FeS according to the contents of Cu, Fe and S in matte and the added white stone amount, oxygen amount and process air amount, calculating the specific oxygen amount, and analyzing the thermodynamic influence law of different slag types, oxygen enrichment concentrations and blowing temperatures on the copper content of the blowing slag by using an Equilib module. By controlling the Fe / CaO proportion, analyzing the balance distribution of Cu, Fe and S by different slag types, fixing the process air volume, adjusting the oxygen-enriched concentration, analyzing the distribution condition of Cu, Fe and S in slag / crude copper / gas three phases, changing the blowing temperature, and analyzing the balance distribution of Cu, Fe and S at different temperatures. According to the method, the theoretical result is combined with the reality, the theoretical conclusion is further verified, and through multi-element phase equilibrium calculation and process optimization, the copper smelting yield and the crude copper grade are improved, the energy consumption is reduced, and the environmental pollution is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pyrometallurgy for copper smelting, and specifically to a method for optimizing the blowing process for a double-furnace continuous copper smelting process. Background Art

[0002] In the research on optimizing the copper blowing stage, the current focus is on improving efficiency, adaptability, and environmental friendliness. For example, the optimization of bottom-blown copper smelting technology, which originated in China, uses oxygen-enriched high-pressure gas to stir the molten bath of copper slag and matte, promoting the reaction to proceed rapidly at a relatively low temperature. This technology has been widely studied for its adaptability to different raw materials, and the current research focuses on improving the thermodynamic properties of the slag and the hydrodynamics of the molten bath. In addition, there are overall plant optimization strategies, which include implementing advanced control systems and optimizing operating parameters (such as oxygen and air flow rates) during flash smelting to improve overall processing efficiency.

[0003] In the double-furnace continuous copper smelting process, the blowing stage is an extremely crucial link. The main task of this stage is to oxidize impurities such as sulfur and iron in the furnace by blowing air or oxygen-enriched gas into the furnace, thereby purifying the copper. This process plays an important role in the quality of the final product, production cost, and environmental impact.

[0004] First of all, the blowing stage is one of the most important stages in the entire copper smelting process, which affects the purity of the smelted copper, energy consumption, environmental emissions, furnace lining life, etc. Therefore, optimizing the copper smelting blowing stage has great benefits. The advantages of optimizing the blowing stage include: increasing production and quality, reducing energy consumption, reducing environmental pollution, extending equipment life, etc. In short, scientifically optimizing the blowing stage in the double-furnace continuous copper smelting process can not only improve the quality and production of copper products, but also achieve energy conservation, emission reduction, and reduce operating costs, which has important economic and environmental significance. In view of this, we propose a method for optimizing the blowing process for a double-furnace continuous copper smelting process. Summary of the Invention

[0005] The purpose of the present invention is to provide an industrial briquette for metallurgical production and its preparation method to solve problems such as increasing production and quality, reducing energy consumption, reducing environmental pollution, and extending equipment life.

[0006] To achieve the above object, the present invention provides a method for optimizing the blowing process for a double-furnace continuous copper smelting process, including the following steps: Step 1: Convert Cu, Fe, and S into Cu2S and FeS according to the contents of Cu, Fe, and S in the matte, the amount of white stone added during blowing, the oxygen amount, and the process air volume, and calculate the specific oxygen amount; Step 2: Use the Equilib module to perform equilibrium calculations on the smelting stage, analyze the thermodynamic influence rules of different slag types, oxygen enrichment concentrations, and smelting temperatures on the copper content in the smelting slag, and obtain the equilibrium distribution rules of Cu, Fe, and S in the three phases of slag / coarse copper / gas in different smelting slag systems; Step 3: Control the Fe / CaO ratio by changing the input amount of white stone, and use the Equilib module to analyze the equilibrium distribution rules of Cu, Fe, and S in the three phases of slag / coarse copper / gas in the smelting slag system for different slag types to determine the optimal iron-calcium ratio; Step 4: According to the relationship among oxygen amount, process air volume, and oxygen concentration, perform conversion. By the method of controlling variables, when converting, fix the process air volume, and then change the oxygen amount during smelting to change the effect of oxygen enrichment concentration. Apply the Equilib module to perform equilibrium calculations and analyze the equilibrium distribution of Cu, Fe, and S in the three phases of slag / coarse copper / gas in the smelting slag system; Step 5: By changing the smelting temperature, use the Equilib module to analyze the equilibrium distribution of Cu, Fe, and S in the three phases of slag / coarse copper / gas in the smelting slag system at different temperatures; Step 6: Comprehensively analyze the calculation results of Steps 1 - 5 to obtain the optimal smelting parameters; Step 7: Finally, combine the results of theoretical calculations with actual production to further verify the conclusions obtained from theoretical calculations.

[0007] Preferably, in Step 1, the matte grade includes 74.5% by mass of Cu, 3.1% by mass of Fe, and 21% by mass of S.

[0008] Preferably, in Step 1, the white stone includes 50% by mass of CaO and 6% by mass of SiO2.

[0009] Preferably, in Step 1, the oxygen amount is 6500 Nm 3 / h.

[0010] Preferably, in Step 1, the process air volume is 27000 Nm 3 / h.

[0011] Preferably, the Equilib module performs equilibrium calculations based on the principle of minimizing Gibbs free energy.

[0012] Preferably, control the Fe / CaO ratio in the smelting process to be 2 - 4.6, and the pressure is 125 kPa.

[0013] Preferably, the adjusted oxygen enrichment concentration range is 16% - 40%.

[0014] Preferably, the blowing temperature range is 1120°C to 1360°C.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In the method for optimizing the blowing process for the double-furnace continuous copper smelting process, the advantages of using equilibrium calculations to optimize the copper blowing stage include: By accurately calculating the feed and fuel requirements, equilibrium calculations can help reduce waste of raw materials, thereby reducing costs and improving overall resource efficiency. Equilibrium calculations can help determine the most suitable operating conditions to minimize energy consumption. This is very important for reducing production costs and minimizing environmental impacts such as greenhouse gas emissions. By precisely controlling the conditions of chemical reactions, unwanted impurities such as sulfur and iron can be better removed, thereby improving the quality and purity of the final product. Equilibrium calculations provide in-depth understanding of each step in the blowing process, enabling operators to more effectively control and adjust the process to adapt to changes in raw materials or other operating conditions. The optimized process conditions can not only reduce energy consumption but also reduce the generation of harmful gases and other by-products, thereby reducing the environmental impact. By reducing the consumption of raw materials and energy and improving product quality, copper blowing enterprises can significantly improve their economic efficiency and market competitiveness. Equilibrium calculations can be easily integrated into computer control systems, helping to scale up and automate the copper blowing process, further improving production efficiency and consistency. Specific embodiments

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0017] The present invention relates to a method for optimizing the blowing process for the double-furnace continuous copper smelting process, which includes the following steps: Step 1: According to the contents of Cu, Fe, and S in the matte, the amount of dolomite added during blowing, the oxygen amount, and the process air volume, convert Cu, Fe, and S into Cu2S and FeS, and calculate the specific oxygen amount. Step 2: Use the Equilib module to perform equilibrium calculations on the blowing stage, analyze the thermodynamic influence laws of different slag types, oxygen enrichment concentrations, and blowing temperatures on the copper content in the blowing slag, and obtain the equilibrium distribution laws of Cu, Fe, and S in the slag / copper matte / gas three-phase in different blowing slag systems. Step 3: Control the Fe / CaO ratio by changing the input amount of dolomite, and use the Equilib module to analyze the equilibrium distribution laws of Cu, Fe, and S in the slag / copper matte / gas three-phase in the blowing slag system for different slag types to determine the optimal iron-calcium ratio. Step 4: According to the relationship among oxygen content, process air volume, and oxygen concentration, perform conversion. By the method of controlling variables, when converting, fix the process air volume, and then change the oxygen content during smelting to change the effect of enriched oxygen concentration. Use the Equilib module to perform equilibrium calculations and analyze the equilibrium distribution of Cu, Fe, and S in the slag / copper matte / gas three-phase in the smelting slag system; Step 5: By changing the smelting temperature, use the Equilib module to analyze the equilibrium distribution of Cu, Fe, and S in the slag / copper matte / gas three-phase in the smelting slag system at different temperatures; Step 6: Comprehensively analyze the calculation results of Steps 1 - 5 to obtain the optimal smelting parameters; Step 7: Finally, combine the results of theoretical calculations with actual production to further verify the conclusions drawn from theoretical calculations.

[0018] Preferably, in Step 1, the copper matte grade includes 74.5% by mass of Cu, 3.1% by mass of Fe, and 21% by mass of S.

[0019] In Step 1, the dolomite includes 50% by mass of CaO and 6% by mass of SiO₂.

[0020] In Step 1, the oxygen content is 6500 Nm 3 / h.

[0021] In Step 1, the process air volume is 27000 Nm 3 / h.

[0022] The Equilib module performs equilibrium calculations based on the principle of minimizing Gibbs free energy.

[0023] Control the Fe / CaO ratio in the smelting process to be 2 - 4.6, and the pressure is 125 kPa.

[0024] Adjust the enriched oxygen concentration range to be 16% - 40%.

[0025] The smelting temperature range is 1120°C - 1360°C.

[0026] Example 1: The copper matte grade of the furnace charge in the smelting stage of an enterprise using the top - side - blown double - furnace continuous copper smelting process is: Cu 74.5%, Fe 3.1%, S 21%, and the oxygen content is 6500 Nm 3 / h, the white stone is 50% CaO and 6% SiO2. Combining with the actual production, at a pressure of 125 kPa, control the Fe / CaO in the blowing process within the range of 2 - 4.6, and then conduct an equilibrium calculation to study the thermodynamic influence of different Fe / CaO (i.e., different addition amounts of CaO and SiO2) on the equilibrium distribution law of Cu, Fe, and S in the slag / coarse copper / gas three-phase system during the blowing stage.

[0027] First of all, according to the calculation results, it can be analyzed that as Fe / CaO increases, the amount of generated gas phase is stable at 402 kg, with a slight upward trend, increasing from 402.69 kg to 403.02 kg. The amount of generated coarse copper increases as Fe / CaO increases, and the amount of generated coarse copper increases from 695.33 kg to 697.78 kg. The amount of generated slag decreases as Fe / CaO increases, and the downward trend is very obvious. The amount of generated slag decreases from 84.712 kg to 72.909 kg.

[0028] In the generated blowing slag, the Cu content increases as Fe / CaO increases, with a small increase amplitude. The Cu content increases from 28.206% to 29.753%. The Fe content in the slag increases as Fe / CaO increases, and the Fe content increases from 35.067% to 40.473%. The S content in the slag is stable at about 0.016% as Fe / CaO increases. If analyzed in detail, there is still a slight upward trend. The S content in the slag increases from 0.0151% to 0.01721%.

[0029] As Fe / CaO increases, the Cu content in the coarse copper is generally stable at about 99%, but there is still a slight decreasing trend as a whole, with a small decrease amplitude. The Cu content decreases from 99.232% to 99.198%. The Fe content in the coarse copper is very low, and the content ratio remains at the 10 - 4 level. The Fe content in the coarse copper generally increases as Fe / CaO increases, with a small increase amplitude. The Fe content in the coarse copper gradually increases from 0.000332% to 0.0004501%. The S content in the coarse copper is low, and the S content decreases as Fe / CaO increases, with a small decrease amplitude. The S content in the slag decreases from 0.1878% to 0.1637%.

[0030] As the Fe / CaO increases, the Cu content in the gas phase remains generally stable at around 0.001733%, which is very low. However, there is still a slight decreasing trend overall, with a relatively small reduction. The Cu content decreases from 0.001733% to 0.001729%. The Fe content in the gas phase is extremely low, with the content ratio remaining at the 10^-10 level, almost non-existent. The S content in the gas phase does not change with the increase of Fe / CaO but remains stable at 50.051%. Therefore, the gas phase remains almost in a stable state all the time.

[0031] Considering that too high calcium content may lead to overly dense slag, which is not conducive to metal separation, through comprehensive analysis, we conclude that when Fe / CaO is around 3.6, it is a relatively optimal value. Because at this time, the amount of slag generated is small, the Cu content remains at around 29%, and the Fe content in the slag is relatively high, indicating that more Fe enters the slag phase. The amount of crude copper produced is maintained at a relatively high level, the grade of crude copper is high, maintained at around 99.2%, the S content is low, maintained at around 0.16%, and the Fe content is also low, at around 0.0004%. Moreover, the Cu content entering the gas phase is also very low, maintained at 0.00173%.

[0032] Example 2: For matte with a grade of Cu 74.5%, Fe 3.1%, S 21%, an iron-calcium ratio of 3.6, and a fixed process air volume of 27000 Nm 3 / h, a balance calculation was carried out for the blowing stage when the oxygen enrichment concentration was 16% - 40%, and the influence of the oxygen enrichment concentration on the equilibrium distribution of Cu, Fe, and S in the slag / crude copper / gas three-phase of the blowing slag system was analyzed.

[0033] As the oxygen enrichment concentration increases, there is a steady upward trend in the amount of gas phase generated, increasing from 256.58 kg to 460.61 kg. The amount of crude copper produced first increases and then decreases with the increase of the oxygen enrichment concentration. When the oxygen enrichment concentration increases from 16% to 20%, the amount of crude copper produced first increases from 256.58 kg to 744.96 kg. When the oxygen enrichment concentration increases from 20% to 32%, the amount of crude copper produced decreases from 744.96 kg to 126.66 kg. When the oxygen enrichment concentration continues to increase from 32% to 40%, no crude copper phase is generated. This phenomenon may be due to overblowing. Too high oxygen concentration may cause valuable metal Cu to enter the slag phase, resulting in the loss of Cu we extracted in the slag.

[0034] The amount of slag generated first decreases and then increases with the increase of oxygen enrichment concentration. When the oxygen enrichment concentration increases from 16% to 20%, the amount of slag generated decreases from 323.458 kg to 60.237 kg. When the oxygen enrichment concentration increases from 16% to 40%, the amount of slag generated increases from 60.237 kg to 860.55 kg. When the oxygen enrichment concentration increases from 26% to 34%, the amount of slag generated increases rapidly. After the oxygen enrichment concentration rises to 34%, the amount of slag generated stabilizes at about 860 kg, and the amount of blister copper generated is zero. This further shows that when smelting at too high an oxygen enrichment concentration, more Cu will enter the slag phase.

[0035] With the increase of oxygen enrichment concentration, the amount of slag generated first decreases and then increases with the increase of oxygen enrichment concentration. When the oxygen enrichment concentration increases from 16% to 20%, the amount of slag generated decreases from 323.458 kg to 60.237 kg, and the Cu content in the slag decreases from 68.381% to 14.288%. When the oxygen enrichment concentration increases from 16% to 40%, the amount of slag generated increases from 60.237 kg to 860.55 kg, and the Cu content in the slag increases from 14.288% to 83.814%. When the oxygen enrichment concentration increases from 22% to 32%, the Cu content in the slag increases rapidly. After the oxygen enrichment concentration rises to 32%, the Cu in the slag stabilizes at about 83%.

[0036] The Fe content in the slag as a whole shows a trend of first increasing and then decreasing with the increase of oxygen enrichment concentration. When the oxygen enrichment concentration increases from 16% to 20%, the Fe content in the slag rapidly increases from 9.179% to 49.276%. When the oxygen enrichment concentration increases from 20% to 40%, the Fe content in the slag rapidly decreases from 49.276% to 3.4879%.

[0037] The S content in the slag as a whole decreases with the increase of oxygen enrichment concentration. When the oxygen enrichment concentration increases from 16% to 34%, the S content in the slag rapidly decreases from 14.77% to 0.000078%. After the oxygen enrichment concentration rises to 32%, the S content in the slag slowly decreases from 0.000078% to 0.000002%.

[0038] When the oxygen enrichment concentration increases from 16% to 24%, the Cu content in the blister copper increases from 94.384% to 99.171%. When the oxygen enrichment concentration increases from 24% to 32%, the Cu content in the blister copper decreases from 99.171% to 96.67%. After the oxygen enrichment concentration continues to increase, no blister copper phase is generated.

[0039] The Fe content in blister copper is very low. Generally, the Fe content decreases with the increase of oxygen enrichment concentration. When the oxygen enrichment concentration increases from 16% to 32%, the Fe content in blister copper gradually decreases from 0.00359% to 0.000023%. Since no blister copper phase is formed after the oxygen enrichment concentration rises to 34%, the Fe content is naturally 0. The S content in blister copper is relatively low and decreases with the increase of oxygen enrichment concentration. When the oxygen enrichment concentration increases from 16% to 32%, the S content in blister copper decreases from 5.1067% to 0.03783%. Since no blister copper phase is formed after the oxygen enrichment concentration rises to 34%, the S content is naturally 0.

[0040] With the increase of oxygen enrichment concentration, the Cu content in the gas phase decreases from 0.00153% to 0.000311%. The Fe content in the gas phase is very low, and the content ratio remains at the 10-10 level, almost non-existent. The S content in the gas phase decreases from 50.056% to 43.594% with the increase of oxygen enrichment concentration.

[0041] Based on the above analysis, it is concluded that the best oxygen enrichment concentration during smelting is 24%. At this time, the amount of blister copper produced is relatively large, and the grade of blister copper is the highest, reaching 99.171%. The amount of slag produced is also relatively small, and the distribution of Cu, Fe, and S in the slag is in a relatively reasonable state.

[0042] Example 3: For matte with a grade of Cu 74.5%, Fe 3.1%, S 21%, an iron-calcium ratio of 3.6, a fixed process air volume of 27000 Nm 3 / h, an oxygen enrichment concentration of 24%, and the blowing temperature controlled at 1120°C - 1360°C, equilibrium calculations are carried out during the blowing stage to analyze the influence of the blowing temperature on the equilibrium distribution of Cu, Fe, and S in the slag / copper / gas three-phase system of the blowing slag.

[0043] First, through the analysis of the equilibrium calculation results, it is found that the amount of slag generated decreases with the increase of the blowing temperature, and the amount of slag generated decreases from 88.423 kg to 71.557 kg. The Cu content in the slag shows a trend of first increasing and then decreasing with the increase of the blowing temperature. When the blowing temperature increases from 1120 °C to 1140 °C, the Cu content in the slag decreases from 32.229% to 35.265%. When the blowing temperature increases from 1140 °C to 1360 °C, the Cu content in the slag slowly decreases from 35.265% to 25.96%. The Fe content in the slag generally increases with the increase of the blowing temperature, and there is a trend of first decreasing and then increasing. When the blowing temperature increases from 1120 °C to 1180 °C, the Fe content in the slag rapidly decreases from 39.124% to 35.443%. When the blowing temperature increases from 1180 °C to 1360 °C, the Fe content in the slag slowly increases from 35.443% to 41.504%. The S content in the slag generally increases slowly with the increase of the blowing temperature, and the S content in the slag rapidly increases from 0.013% to 0.02752%.

[0044] The amount of blister copper generated increases with the increase of the blowing temperature. The amount of blister copper generated first increases from 689.20 kg to 703.62 kg. The Cu content in the blister copper decreases from 99.648% to 98.816% with the increase of the blowing temperature. The Fe content in the blister copper is very low. The Fe content generally increases with the increase of the blowing temperature. The Fe content in the blister copper gradually increases from 0.000054% to 0.12951%. The S content in the blister copper is relatively low. The S content first decreases and then increases with the increase of the blowing temperature. When the blowing temperature increases from 1120 °C to 1140 °C, the S content in the blister copper decreases from 0.1213% to 0.0978%. When the blowing temperature increases from 1140 °C to 1360 °C, the S content in the blister copper increases from 0.0978% to 0.3183%.

[0045] With the increase of the blowing temperature, the amount of gas phase generated shows a slight trend of first increasing and then decreasing. When the temperature increases from 1120 °C to 1180 °C, the amount of gas phase generated increases from 398.4 kg to 403.83 kg. When the temperature increases from 1180 °C to 1360 °C, the amount of gas phase generated decreases from 403.83 kg to 400.81 kg. With the increase of the blowing temperature, the Cu content in the gas phase increases from 0.00003984% to 0.004991%; the Fe content in the gas phase is very low, and the content ratio remains at the 10-10 level, almost non-existent. The S content in the gas phase stabilizes at about 50.05% with the increase of the blowing temperature, and the S content in the gas phase increases from 50.05% to 50.052%.

[0046] Too low blowing temperature will cause the reaction rate in the furnace to decline, reducing the blowing efficiency. However, although too high temperature can accelerate the reaction rate, it may lead to excessive oxidation of copper, thus increasing metal loss. Through comprehensive analysis of the calculation results combined with the above reasons, it is concluded that when the blowing temperature is around 1280 °C, it is the optimal blowing temperature, because at this time, the amount of blister copper produced is relatively high, about 697 kg, the grade of blister copper is maintained at about 99.2%, and the amount of slag produced is also relatively low. The distribution of Cu, Fe, and S in the slag is also in a reasonable state.

[0047] Combined with theoretical calculations and production practice, the optimized smelting parameters in the blowing stage of a double-furnace continuous copper smelting process are as follows: the smelting temperature is about 1280 °C, Fe / CaO is about 3.6 (that is, the input amount of white stone is about 17 t / d, containing about 50% CaO and about 6% SiO2), and the optimal oxygen enrichment concentration is 24%.

[0048] In order to further verify the optimized results of the smelting parameters in the blowing stage, they are applied to actual smelting, and the simulation calculation results are combined with actual blowing for comprehensive analysis.

[0049] The following will list in tabular form the blowing parameters selected within the optimized range and the grade of blister copper obtained by blowing to prove the feasibility of the optimized slag type obtained by this method. The table is as follows: The following blowing conditions are the results obtained in the smelting stage when the blowing temperature is 1280 °C, 125 kpa, and the oxygen enrichment concentration is about 24%: Due to the slight differences in the quality of matte during each batch of blowing, the above table lists the actual blowing results after adjustment within a reasonable range based on the analysis of the calculation results of thermodynamic multi-phase equilibrium during blowing.

[0050] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for optimizing the blowing process in the double-furnace continuous copper smelting process, characterized in that, It includes the following steps: Step 1: According to the contents of Cu, Fe, and S in matte, the amount of dolomite added during blowing, the amount of oxygen, and the process air volume, convert Cu, Fe, and S into Cu2S and FeS, and calculate the specific amount of oxygen; Step 2: Use the Equilib module to perform equilibrium calculations for the blowing stage, analyze the thermodynamic influence laws of different slag types, oxygen enrichment concentrations, and blowing temperatures on the copper content in the blowing slag, and obtain the equilibrium distribution laws of Cu, Fe, and S in the slag / coarse copper / gas three-phase in different blowing slag systems; Step 3: Control the Fe / CaO ratio by changing the input amount of dolomite, and use the Equilib module to analyze the equilibrium distribution laws of Cu, Fe, and S in the slag / coarse copper / gas three-phase in the blowing slag system for different slag types to determine the optimal iron-calcium ratio; Step 4: According to the relationship among the amount of oxygen, process air volume, and oxygen concentration, perform conversion. By the method of controlling variables, when converting, fix the process air volume, and then change the amount of oxygen during blowing to change the effect of oxygen enrichment concentration. Apply the Equilib module to perform equilibrium calculations and analyze the equilibrium distribution of Cu, Fe, and S in the slag / coarse copper / gas three-phase in the blowing slag system; Step 5: By changing the blowing temperature, use the Equilib module to analyze the equilibrium distribution of Cu, Fe, and S in the slag / coarse copper / gas three-phase in the blowing slag system at different temperatures; Step 6: Conduct a comprehensive analysis of the calculation results of Steps 1 - 5 to obtain the optimal blowing parameters; Step 7: Finally, combine the results of theoretical calculations with actual production to further verify the conclusions drawn from theoretical calculations.

2. The method for optimizing the blowing process for the double-furnace continuous copper smelting process according to claim 1, characterized in that, In the said Step 1, the matte grade includes 74.5% by mass of Cu, 3.1% by mass of Fe, and 21% by mass of S.

3. The method for optimizing the blowing process for the double-furnace continuous copper smelting process according to claim 1, wherein In the said Step 1, the dolomite includes 50% by mass of CaO and 6% by mass of SiO2.

4. The method for optimizing the blowing process for the double-furnace continuous copper smelting process according to claim 1, wherein In the step 1, the oxygen content is 6500 Nm 3 / h.

5. The method for optimizing the blowing process for the double-furnace continuous copper smelting process according to claim 1, characterized in that, In the said step 1, the process air volume is 27000 Nm 3 / h.

6. The method for optimizing the blowing process for the double-furnace continuous copper smelting process according to claim 1, characterized in that, The said Equilib module performs equilibrium calculations based on the principle of minimizing Gibbs free energy.

7. The method for optimizing the blowing process for the double-furnace continuous copper smelting process according to claim 1, wherein Control the Fe / CaO ratio in the blowing process to be 2 - 4.6, and the pressure is 125 kPa.

8. The method for optimizing the blowing process for the double-furnace continuous copper smelting process according to claim 1, characterized in that, The adjusted oxygen enrichment concentration range is 16% - 40%.

9. The method for optimizing the blowing process for the double-furnace continuous copper smelting process according to claim 1, characterized in that, The blowing temperature range is 1120°C - 1360°C.

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