A method for improving the quality of copper smelting ring gypsum

Abstract

The application relates to a method for improving the quality of copper smelting ring gypsum, and belongs to the technical field of improving the quality of ring gypsum. The method comprises the following steps: collecting unreacted ring gypsum, placing the unreacted ring gypsum into a stirring bin, stirring at 30-50 r / min for 5-20 min, and storing at a constant temperature of 30 DEG C for standby; pretreating the ring gypsum: the recycled ring gypsum is dehydrated, crushed and ground for standby; preparing a slurry: mixing the pretreated ring gypsum, limestone powder and water to prepare a slurry; deacidification reaction: uniformly adding the prepared slurry into dearsenification waste acid at a speed of 0.2 m / s, controlling the temperature to be 45-50 DEG C, the time to be 1-2 h, the rotating speed to be 60-100 r / min, and the reaction end point PH to be 1-2 to obtain deacidification slurry; product treatment: separating and drying the deacidification slurry to obtain completely reacted ring gypsum. The unreacted ring gypsum is reused as a deacidification agent, which not only reduces the generation of waste, but also promotes the recycling of ring gypsum.

Description

Technical Field

[0001] This invention belongs to the technical field of improving the quality of ring-forming gypsum, and specifically relates to a method for improving the quality of ring-forming gypsum in copper smelting. Background Technology

[0002] Currently, the circulating flue gas system uses calcium carbonate absorption to treat sulfur dioxide in the flue gas. The average sulfur dioxide content is 700-1500 mg / Nm3. In sulfuric acid plants using limestone powder for desulfurization, due to the low sulfur dioxide content, excessive amounts of limestone emulsion need to be added during spray desulfurization to bring the sulfur dioxide emission level below the 400 mg / Nm3 emission standard. This results in some calcium carbonate in the limestone not being fully converted to calcium sulfate, leading to a decrease in gypsum quality. The reaction equation is as follows:

[0003] Sulfur dioxide reacts with calcium carbonate and water to produce calcium sulfite and carbon dioxide.

[0004] CaCO3+SO2+H2O→CaSO3·H2O+CO2

[0005] Calcium sulfite is then oxidized to calcium sulfate by oxygen in the air:

[0006] 2CaSO3·H2O + O2 → 2CaSO4·H2O

[0007] In the process of producing acid from copper smelting flue gas, the flue gas purification process generates a large amount of waste acid. Direct discharge of this waste acid without treatment would cause serious environmental pollution. It needs to undergo a process of sulfide arsenic removal, calcium carbonate deacidification, and lime + iron salt arsenic and fluoride removal to meet reuse standards. Simultaneously, the smelting process's ring-collector flue gas desulfurization also generates a large amount of unreacted ring-collector gypsum. Using this gypsum in the waste acid neutralization process not only ensures complete reaction of calcium carbonate, improving product quality, but also reduces the consumption of limestone powder specifically used for waste acid by approximately one-third. The reaction equation is as follows:

[0008] CaCa3+H2So4→CaSO4↓+H2O+Co2↑

[0009] Calcium carbonate + sulfuric acid → calcium sulfate + carbon dioxide and water.

[0010] The commonly used treatment methods in the desulfurization process of flue gas in copper smelting ring collection are as follows:

[0011] The calcium carbonate desulfurization method involves preparing limestone powder into an emulsion, which is then sprayed to react with the flue gas. The resulting emulsion is then oxidized to produce cyclic gypsum. The advantages of limestone desulfurization are its low price, wide applicability, and fast reaction speed. However, its disadvantages are that in actual operation, due to various factors such as reaction conditions, reaction time, and limestone particle size, the reaction often cannot achieve complete conversion. As a result, a large amount of unreacted limestone remains, leading to incomplete reaction and low-quality gypsum. Summary of the Invention

[0012] The purpose of this invention is to provide a method for improving the quality of copper smelting ring-forming gypsum in order to solve the above-mentioned problems.

[0013] The present invention achieves the above objectives through the following technical solutions:

[0014] This invention provides a method for improving the quality of copper smelting ring-forming gypsum, comprising the following steps:

[0015] Recovery of cyclic gypsum: Collect unreacted cyclic gypsum, put the unreacted cyclic gypsum into the mixing chamber, stir at 30-50 r / min for 5-20 min, and store at a constant temperature of 30℃ for later use.

[0016] Pretreatment of cyclic gypsum: The recycled cyclic gypsum is dehydrated, crushed, and ground before being put into use.

[0017] Preparation of dispersant: (i) Harvest 3-5 year old aloe vera, remove the roots and epidermis to obtain aloe vera flesh; (ii) Immerse the aloe vera flesh in the modified solution, take it out after 40-60 minutes, and dry it. When the internal moisture content reaches 20%-35%, stop drying and crush it to obtain aloe vera granules with a particle size of 0.1-0.3 mm; (iii) Coat the aloe vera granules with color powder and granulate them to obtain aloe vera pellets.

[0018] Slurry preparation: Pretreated cyclohexane, limestone powder and water are mixed to prepare slurry;

[0019] Deacidification reaction: The prepared slurry is added to the arsenic removal waste acid at a uniform rate of 0.2 m / s, and the temperature is controlled at 45-50℃, the time is 1-2h, and the rotation speed is 60-100 r / min. The final pH of the reaction is 1-2 to obtain the deacidified slurry.

[0020] Product processing: The deacidified slurry is subjected to water separation and drying to obtain cyclic gypsum that has undergone complete reaction.

[0021] As a further optimization of the present invention, the cyclic gypsum is composed of calcium sulfate and calcium carbonate.

[0022] As a further optimization of the present invention, the mass ratio of the cyclohexane gypsum, limestone powder and water is 1:1:50.

[0023] As a further optimization of the present invention, the preparation process of the modified solution is as follows: silver ion solution, phosphate ester, aluminum powder, chitin and talc are mixed and stirred at 60-90 r / min for 20-45 min, then 75% ethanol solution is added and soaked for 45-60 min, and then 3 times the volume of pure water is added to obtain the modified solution.

[0024] As a further optimization of the present invention, the raw materials for preparing the modified solution, by weight, include: 5-10 parts silver ion solution, 2-5 parts phosphate ester, 20-25 parts aluminum powder, 6-12 parts chitosan, 15-20 parts talc powder and 40-60 parts 75% ethanol solution.

[0025] As a further optimization of the present invention, the mass ratio of aloe vera granules to color powder is 2:1.

[0026] As a further optimization of the present invention, the pigments are iron oxide red and iron oxide green, and the mass ratio of iron oxide red to iron oxide green is 1:1.

[0027] As a further optimization of the present invention, the mass ratio of the slurry to the arsenic removal waste acid is 3 g / L slurry: 30 g / L arsenic removal waste acid.

[0028] The beneficial effects of this invention are as follows: by reusing incompletely reacted cyclohexane as a deacidifying agent, not only is waste generation reduced, but the recycling of cyclohexane is also promoted. During this process, the physical and chemical properties of the cyclohexane are optimized, thereby improving its quality. The gypsum content reaches 99%, and the treated cyclohexane exhibits better stability and reactivity, making it perform better in various industrial applications.

[0029] The key step in the invention is to use cyclohexane as a substitute for calcium carbonate in the neutralization reaction during the deacidification process of waste acid. This innovative method reduces the amount of calcium carbonate used by 30%, thereby reducing the cost of raw materials. Detailed Implementation

[0030] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0031] Material

[0032] Unless otherwise specified, all methods used in this invention are conventional methods known to those skilled in the art, and all reagents and materials used are commercially available products.

[0033] Example 1

[0034] Recovery of cyclic gypsum: Collect the unreacted cyclic gypsum, put the unreacted cyclic gypsum into the mixing chamber (cyclic gypsum is composed of calcium sulfate and calcium carbonate), stir at 30 r / min for 5 min, and store at a constant temperature of 30℃ for later use.

[0035] Pretreatment of cyclic gypsum: The recycled cyclic gypsum is dehydrated, crushed, and ground before being put into use.

[0036] The preparation process of the modified solution is as follows: 5 parts silver ion solution, 2 parts phosphate ester, 20 parts aluminum powder, 6 parts chitosan, and 15 parts talc powder are mixed and stirred at 60 r / min for 20 min. Then, 40 parts 75% ethanol solution is added and soaked for 45 min. Finally, 3 times the volume of pure water is added to obtain the modified solution.

[0037] Preparation of dispersant: (i) Harvest 3-year-old aloe vera, remove the roots and epidermis to obtain aloe vera flesh; (ii) Immerse the aloe vera flesh in the modified solution, take it out after 40 minutes, dry it, stop drying when the internal moisture reaches 20%, crush it, and take aloe vera granules with a particle size of 0.1 mm; (iii) Coat the aloe vera granules with color powder and granulate them to obtain aloe vera pellets (the mass ratio of aloe vera granules to color powder is 2:1, and the color powder is iron oxide red and iron oxide green, with a mass ratio of iron oxide red and iron oxide green of 1:1).

[0038] Slurry preparation: Pretreated cyclohexane, limestone powder and water are mixed to prepare slurry (the mass ratio of cyclohexane, limestone powder and water is 1:1:50);

[0039] Deacidification reaction: The prepared slurry was added to the arsenic removal waste acid at a uniform rate of 0.2 m / s, and the temperature was controlled at 45℃, the time was 1 h, and the rotation speed was 60 r / min. The reaction endpoint pH was 1 to obtain the deacidified slurry (3 g / L slurry: 30 g / L arsenic removal waste acid);

[0040] Product processing: The deacidified slurry is subjected to water separation and drying to obtain cyclic gypsum that has undergone complete reaction.

[0041] Example 2

[0042] Recovery of cyclohexane: Collect the unreacted cyclohexane, put the unreacted cyclohexane into the mixing chamber (cyclohexane is composed of calcium sulfate and calcium carbonate), stir at 45 r / min for 15 min, and store at a constant temperature of 30℃ for later use.

[0043] Pretreatment of cyclic gypsum: The recycled cyclic gypsum is dehydrated, crushed, and ground before being put into use.

[0044] The preparation process of the modified solution is as follows: 8 parts silver ion solution, 3 parts phosphate ester, 22 parts aluminum powder, 10 parts chitosan, and 18 parts talc powder are mixed and stirred at 80 r / min for 30 min. Then, 55 parts 75% ethanol solution is added and soaked for 50 min. Finally, 3 times the volume of pure water is added to obtain the modified solution.

[0045] Preparation of dispersant: (i) Harvest 5-year-old aloe vera, remove the roots and epidermis to obtain aloe vera flesh; (ii) Immerse the aloe vera flesh in the modified solution, take it out after 50 minutes, dry it, stop drying when the internal moisture reaches 30%, crush it, and take aloe vera granules with a particle size of 0.2 mm; (iii) Coat the aloe vera granules with color powder and granulate them to obtain aloe vera pellets (the mass ratio of aloe vera granules to color powder is 2:1, and the color powder is iron oxide red and iron oxide green, with a mass ratio of iron oxide red and iron oxide green of 1:1).

[0046] Slurry preparation: Pretreated cyclohexane, limestone powder and water are mixed to prepare slurry (the mass ratio of cyclohexane, limestone powder and water is 1:1:50);

[0047] Deacidification reaction: The prepared slurry was added to the arsenic removal waste acid at a uniform rate of 0.2 m / s, and the temperature was controlled at 48℃, the time at 1.5 h, and the rotation speed at 80 r / min. The final reaction pH was 2, and the deacidified slurry (3 g / L slurry: 30 g / L arsenic removal waste acid) was obtained.

[0048] Product processing: The deacidified slurry is subjected to water separation and drying to obtain cyclic gypsum that has undergone complete reaction.

[0049] Example 3

[0050] Recovery of cyclic gypsum: Collect unreacted cyclic gypsum, put the unreacted cyclic gypsum into a mixing chamber (cyclic gypsum is composed of calcium sulfate and calcium carbonate), stir at 50 r / min for 20 min, and store at a constant temperature of 30℃ for later use.

[0051] Pretreatment of cyclic gypsum: The recycled cyclic gypsum is dehydrated, crushed, and ground before being put into use.

[0052] The preparation process of the modified solution is as follows: 10 parts silver ion solution, 5 parts phosphate ester, 25 parts aluminum powder, 12 parts chitosan, and 20 parts talc powder are mixed and stirred at 90 r / min for 45 min. Then, 60 parts 75% ethanol solution is added and soaked for 60 min. Finally, 3 times the volume of pure water is added to obtain the modified solution.

[0053] Preparation of dispersant: (i) Harvest 5-year-old aloe vera, remove the roots and epidermis to obtain aloe vera flesh; (ii) Immerse the aloe vera flesh in the modified solution, take it out after 60 minutes, dry it, stop drying when the internal moisture reaches 35%, crush it, and take aloe vera granules with a particle size of 0.3 mm; (iii) Coat the aloe vera granules with color powder and granulate them to obtain aloe vera pellets (the mass ratio of aloe vera granules to color powder is 2:1, and the color powder is iron oxide red and iron oxide green, with a mass ratio of iron oxide red and iron oxide green of 1:1);

[0054] Slurry preparation: Pretreated cyclohexane, limestone powder and water are mixed to prepare slurry (the mass ratio of cyclohexane, limestone powder and water is 1:1:50);

[0055] Deacidification reaction: The prepared slurry was added to the arsenic removal waste acid at a uniform rate of 0.2 m / s, and the temperature was controlled at 50℃, the time was 2h, and the rotation speed was 100 r / min. The final pH of the reaction was 2, and the deacidified slurry was obtained (3g / L slurry: 30g / L arsenic removal waste acid).

[0056] Product processing: The deacidified slurry is subjected to water separation and drying to obtain cyclic gypsum that has undergone complete reaction.

[0057] Comparative Example 1

[0058] Recovery of cyclohexane: Collect the unreacted cyclohexane, put the unreacted cyclohexane into the mixing chamber (cyclohexane is composed of calcium sulfate and calcium carbonate), stir at 45 r / min for 15 min, and store at a constant temperature of 30℃ for later use.

[0059] Pretreatment of cyclic gypsum: The recycled cyclic gypsum is dehydrated, crushed, and ground before being put into use.

[0060] The preparation process of the modified solution is as follows: 11 parts of phosphate ester, 22 parts of aluminum powder, 10 parts of chitin, and 18 parts of talc powder are mixed and stirred at 80 r / min for 30 min. Then, 55 parts of 75% ethanol solution are added and soaked for 50 min. Finally, 3 times the volume of pure water is added to obtain the modified solution.

[0061] Preparation of dispersant: (i) Harvest 5-year-old aloe vera, remove the roots and epidermis to obtain aloe vera flesh; (ii) Immerse the aloe vera flesh in the modified solution, take it out after 50 minutes, dry it, stop drying when the internal moisture reaches 30%, crush it, and take aloe vera granules with a particle size of 0.2 mm; (iii) Coat the aloe vera granules with color powder and granulate them to obtain aloe vera pellets (the mass ratio of aloe vera granules to color powder is 2:1, and the color powder is iron oxide red and iron oxide green, with a mass ratio of iron oxide red and iron oxide green of 1:1).

[0062] Slurry preparation: Pretreated cyclohexane, limestone powder and water are mixed to prepare slurry (the mass ratio of cyclohexane, limestone powder and water is 1:1:50);

[0063] Deacidification reaction: The prepared slurry was added to the arsenic removal waste acid at a uniform rate of 0.2 m / s, and the temperature was controlled at 48℃, the time at 1.5 h, and the rotation speed at 80 r / min. The final reaction pH was 2, and the deacidified slurry (3 g / L slurry: 30 g / L arsenic removal waste acid) was obtained.

[0064] Product processing: The deacidified slurry is subjected to water separation and drying to obtain cyclic gypsum that has undergone complete reaction.

[0065] Comparative Example 2

[0066] Recovery of cyclohexane: Collect the unreacted cyclohexane, put the unreacted cyclohexane into the mixing chamber (cyclohexane is composed of calcium sulfate and calcium carbonate), stir at 45 r / min for 15 min, and store at a constant temperature of 30℃ for later use.

[0067] Pretreatment of cyclic gypsum: The recycled cyclic gypsum is dehydrated, crushed, and ground before being put into use.

[0068] The preparation process of the modified solution is as follows: 11 parts silver ion solution, 22 parts aluminum powder, 10 parts chitosan and 18 parts talc powder are mixed and stirred at 80 r / min for 30 min. Then, 55 parts 75% ethanol solution is added and soaked for 50 min. Finally, 3 times the volume of pure water is added to obtain the modified solution.

[0069] Preparation of dispersant: (i) Harvest 5-year-old aloe vera, remove the roots and epidermis to obtain aloe vera flesh; (ii) Immerse the aloe vera flesh in the modified solution, take it out after 50 minutes, dry it, stop drying when the internal moisture reaches 30%, crush it, and take aloe vera granules with a particle size of 0.2 mm; (iii) Coat the aloe vera granules with color powder and granulate them to obtain aloe vera pellets (the mass ratio of aloe vera granules to color powder is 2:1, and the color powder is iron oxide red and iron oxide green, with a mass ratio of iron oxide red and iron oxide green of 1:1).

[0070] Slurry preparation: Pretreated cyclohexane, limestone powder and water are mixed to prepare slurry (the mass ratio of cyclohexane, limestone powder and water is 1:1:50);

[0071] Deacidification reaction: The prepared slurry was added to the arsenic removal waste acid at a uniform rate of 0.2 m / s, and the temperature was controlled at 48℃, the time at 1.5 h, and the rotation speed at 80 r / min. The final reaction pH was 2, and the deacidified slurry (3 g / L slurry: 30 g / L arsenic removal waste acid) was obtained.

[0072] Product processing: The deacidified slurry is subjected to water separation and drying to obtain cyclic gypsum that has undergone complete reaction.

[0073] Comparative Example 3

[0074] Recovery of cyclohexane: Collect the unreacted cyclohexane, put the unreacted cyclohexane into the mixing chamber (cyclohexane is composed of calcium sulfate and calcium carbonate), stir at 45 r / min for 15 min, and store at a constant temperature of 30℃ for later use.

[0075] Pretreatment of cyclic gypsum: The recycled cyclic gypsum is dehydrated, crushed, and ground before being put into use.

[0076] The preparation process of the modified solution is as follows: 8 parts silver ion solution, 3 parts phosphate ester, 22 parts aluminum powder, 10 parts chitosan and 18 parts talc powder are mixed and stirred at 80 r / min for 30 min. Then, 55 parts deionized water are added and soaked for 50 min. Finally, 3 times the volume of pure water is added to obtain the modified solution.

[0077] Preparation of dispersant: (i) Harvest 5-year-old aloe vera, remove the roots and epidermis to obtain aloe vera flesh; (ii) Immerse the aloe vera flesh in the modified solution, take it out after 50 minutes, dry it, stop drying when the internal moisture reaches 30%, crush it, and take aloe vera granules with a particle size of 0.2 mm; (iii) Coat the aloe vera granules with color powder and granulate them to obtain aloe vera pellets (the mass ratio of aloe vera granules to color powder is 2:1, and the color powder is iron oxide red and iron oxide green, with a mass ratio of iron oxide red and iron oxide green of 1:1).

[0078] Slurry preparation: Pretreated cyclohexane, limestone powder and water are mixed to prepare slurry (the mass ratio of cyclohexane, limestone powder and water is 1:1:50);

[0079] Deacidification reaction: The prepared slurry was added to the arsenic removal waste acid at a uniform rate of 0.2 m / s, and the temperature was controlled at 48℃, the time at 1.5 h, and the rotation speed at 80 r / min. The final reaction pH was 2, and the deacidified slurry (3 g / L slurry: 30 g / L arsenic removal waste acid) was obtained.

[0080] Product processing: The deacidified slurry is subjected to water separation and drying to obtain cyclic gypsum that has undergone complete reaction.

[0081] Comparative Example 4

[0082] Recovery of cyclohexane: Collect the unreacted cyclohexane, put the unreacted cyclohexane into the mixing chamber (cyclohexane is composed of calcium sulfate and calcium carbonate), stir at 45 r / min for 15 min, and store at a constant temperature of 30℃ for later use.

[0083] Pretreatment of cyclic gypsum: The recycled cyclic gypsum is dehydrated, crushed, and ground before being put into use.

[0084] The preparation process of the modified solution is as follows: 11 parts silver ion solution, 22 parts aluminum powder, 10 parts chitosan and 18 parts talc powder are mixed and stirred at 80 r / min for 30 min. Then, 55 parts 75% ethanol solution is added and soaked for 50 min. Finally, 3 times the volume of pure water is added to obtain the modified solution.

[0085] Preparation of dispersant: (i) Harvest 5-year-old aloe vera, remove the roots and epidermis to obtain aloe vera flesh; (ii) Immerse the aloe vera flesh in the modified solution, take it out after 50 minutes, dry it, stop drying when the internal moisture reaches 30%, crush it, and take aloe vera granules with a particle size of 0.2 mm.

[0086] Slurry preparation: Pretreated cyclohexane, limestone powder and water are mixed to prepare slurry (the mass ratio of cyclohexane, limestone powder and water is 1:1:50);

[0087] Deacidification reaction: The prepared slurry was added to the arsenic removal waste acid at a uniform rate of 0.2 m / s, and the temperature was controlled at 48℃, the time at 1.5 h, and the rotation speed at 80 r / min. The final reaction pH was 2, and the deacidified slurry (3 g / L slurry: 30 g / L arsenic removal waste acid) was obtained.

[0088] Product processing: The deacidified slurry is subjected to water separation and drying to obtain cyclic gypsum that has undergone complete reaction.

[0089] Performance testing

[0090] I. Prepare specimens according to section 4.3 of GB / T17669.3-1999, store specimens according to section 4.4, and then determine the flexural strength and compressive strength of the specimens 2 hours after contact with water, according to sections 5 and 6 respectively.

[0091] The test results are shown in the table below:

[0092] Item 2h flexural strength 2h compressive strength Example 1 3.1 MPa 6.1 MPa Example 2 3.5 MPa 6.5 MPa Example 3 3.0 MPa 6.5 MPa Comparative Example 1 2.8 MPa 5.3 MPa Comparative Example 2 2.4 MPa 5.4 MPa Comparative Example 3 2.3 MPa 5.1 MPa Comparative Example 4 2.3 MPa 5.0 MPa

[0093] As can be seen from the table above, the circumferential strength and compressive strength of the circumferential gypsum prepared by the methods of Examples 1-3 are better than those of the circumferential gypsum prepared by the methods of Comparative Examples 1-4 after 2 hours of water contact. It is conceivable that adding modified aloe vera pellets during the preparation of circumferential gypsum can increase the flexural strength and compressive strength of circumferential gypsum.

[0094] The use of aloe vera granules to encapsulate the color powder is to facilitate workers' observation of the mixing degree of the material. When the material turns light yellow, it proves that the material is completely and evenly mixed, preventing uneven mixing and thus affecting the quality of the gypsum.

[0095] 2. Mix the ring-forming plaster with water at a ratio of 1:1.5; place the mixed material in a container with a depth of 30cm and a radius of 10cm, and observe it through an observation window; place a 0.5kg solid iron ball 45cm above the surface of the ring-forming plaster, allowing the iron ball to fall naturally; test the depth of the iron ball's fall at 10 minutes, 30 minutes, and 45 minutes after the ring-forming plaster has cured.

[0096] The test results are shown in the table below.

[0097] Item 10th min 30th min 45th min Example 2 6 cm 4 cm 2 cm Comparative Example 1 9 cm 7 cm 5 cm Blank 10 cm 9 cm 7 cm

[0098] As can be seen from the table above, the cyclohexane prepared by the method in Example 2 has a shorter curing time and is easier to cure. In actual use, the required waiting time is shorter, which increases work efficiency.

[0099] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A method for improving the quality of copper smelting ring-forming gypsum, characterized in that, Includes the following steps: Recovery of cyclic gypsum: Collect the unreacted cyclic gypsum, put the unreacted cyclic gypsum into the mixing chamber, stir at 30-50 r / min for 5-20 min, and store at a constant temperature of 30℃ for later use. Pretreatment of cyclic gypsum: The recycled cyclic gypsum is dehydrated, crushed, and ground before being put into use. Preparation of dispersant: (i) Harvest 3-5 year old aloe vera, remove the roots and epidermis to obtain aloe vera flesh; (ii) Immerse the aloe vera flesh in the modified solution, take it out after 40-60 minutes, and dry it. When the internal moisture content reaches 20%-35%, stop drying and crush it to obtain aloe vera granules with a particle size of 0.1-0.3 mm; (iii) Coat the aloe vera granules with color powder and granulate them to obtain aloe vera pellets. Slurry preparation: Pretreated cyclohexane, limestone powder and water are mixed to prepare slurry; Deacidification reaction: The prepared slurry is added to the arsenic removal waste acid at a uniform rate of 0.2 m / s, and the temperature is controlled at 45-50℃, the time is 1-2h, and the rotation speed is 60-100 r / min. The final pH of the reaction is 1-2 to obtain the deacidified slurry. Product processing: The deacidified slurry is subjected to water separation and drying to obtain fully reacted cyclohexane gypsum; Modified aloe vera was added to the gypsum granules during the preparation process; The preparation process of the modified solution is as follows: silver ion solution, phosphate ester, aluminum powder, chitin and talc are mixed and stirred at 60-90 r / min for 20-45 min, then 75% ethanol solution is added and soaked for 45-60 min, and then 3 times the volume of pure water is added to obtain the modified solution. The pigments used are iron oxide red and iron oxide green.

2. The method for improving the quality of copper smelting ring-forming gypsum according to claim 1, characterized in that, The cyclic gypsum is composed of calcium sulfate and calcium carbonate.

3. The method for improving the quality of copper smelting ring-forming gypsum according to claim 1, characterized in that, The mass ratio of the cyclohexane gypsum, limestone powder and water is 1:1:

50.

4. The method for improving the quality of copper smelting ring-forming gypsum according to claim 1, characterized in that, The raw materials for preparing the modified solution, by weight, include: 5-10 parts silver ion solution, 2-5 parts phosphate ester, 20-25 parts aluminum powder, 6-12 parts chitosan, 15-20 parts talc powder, and 40-60 parts 75% ethanol solution.

5. The method for improving the quality of copper smelting ring-forming gypsum according to claim 1, characterized in that, The mass ratio of aloe vera granules to color powder is 2:

1.

6. The method for improving the quality of copper smelting ring-forming gypsum according to claim 1, characterized in that, The mass ratio of iron oxide red to iron oxide green is 1:

1.

7. The method for improving the quality of copper smelting ring-forming gypsum according to claim 1, characterized in that, The mass ratio of the slurry to the arsenic removal waste acid is 3 g / L slurry: 30 g / L arsenic removal waste acid.