Efficient and energy-saving reaction tower kettle for large-scale preparation of high-purity basic cupric carbonate

Abstract

The utility model belongs to the technical field of copper production equipment, and particularly relates to an efficient and energy-saving reaction tower kettle for preparing high-purity basic cupric carbonate on a large scale. A reaction tower kettle for efficient and energy-saving large-scale preparation of high-purity basic cupric carbonate comprises a stripping tower and a reaction kettle, a plurality of layers of tower plates are arranged in the stripping tower, a gas outlet is formed in the top of the stripping tower, a material distribution disc is arranged below the gas outlet, a gas sensor is arranged between the material distribution disc and the gas outlet, and the gas sensor is connected with the reaction kettle. A material inlet is formed in the side surface of the material distribution disc, and an eccentric stirrer is arranged in the reaction kettle. The device is compact in structure and high in practicability, steam passes through the tower plates layer by layer through combined use of the stripping tower and the reaction kettle, ammonia-containing water vapor can be condensed into water on the tower plates and returns to the reaction kettle with heat, the heated tower plates can heat newly added ammonia water and carbon dioxide, and the heat can be fully utilized.

Description

Technical Field

[0001] This utility model belongs to the technical field of copper production equipment, specifically a reaction tower for the large-scale production of high-purity basic copper carbonate that is highly efficient and energy-saving. Background Technology

[0002] Currently, the production processes for metal compounds, including nickel carbonate, zinc carbonate, (active) copper oxide, and copper carbonate, are lengthy, energy-intensive, and involve complex equipment structures, and various other drawbacks.

[0003] Activated copper oxide is characterized by high purity, small particle size, large specific surface area, and rapid dissolution in acids specified by the electroplating industry. It possesses many unique properties and significant potential applications in electronics, catalysis, and other fields. High-purity activated copper oxide powder is typically produced using the carbonate calcination method. However, this method is lengthy, difficult to wash afterward, results in low product purity and poor dispersibility, coarsened grains after calcination leading to low product activity, relatively high costs, and the generation of high-salt wastewater.

[0004] Regarding the production process of activated copper oxide, the following are some commonly used processes among the currently disclosed utility model patents:

[0005] Chinese Patent Application No. 01127175.2 discloses a process for producing active copper oxide by using copper sulfate and copper material as raw materials, oxidizing them at a low temperature of 80-85℃ to obtain copper sulfate crystals, then preparing a solution to react with sodium hydroxide, and finally ball milling, pressure filtration, washing, drying, and pulverizing the solution.

[0006] However, the current solution still has drawbacks such as complex process flow, low integration level, large footprint, high energy consumption, and the generation of a large amount of wastewater and waste gas. Utility Model Content

[0007] The purpose of this invention is to provide a high-efficiency, energy-saving reaction tower for large-scale preparation of high-purity basic copper carbonate in order to solve the above-mentioned problems, thus resolving the issues mentioned in the background art.

[0008] To address the above problems, this utility model provides a technical solution:

[0009] A high-efficiency and energy-saving reaction tower for large-scale preparation of high-purity basic copper carbonate includes a stripping tower and a reaction vessel. The stripping tower has several layers of trays, an outlet at the top, a feeding tray below the outlet, a gas sensor between the feeding tray and the outlet, a feed inlet on the side of the feeding tray, and an eccentric stirrer inside the reaction vessel.

[0010] Preferably, the reactor is provided with a heating jacket on the outside, and an electric heating tube is fixedly installed inside the jacket.

[0011] Preferably, the stripping tower is provided with an observation window.

[0012] Preferably, the tray is provided with several baffles, with gaps between the baffles. The baffles include a left plate and a right plate, and the left plate and the right plate are at an angle of 90-140 degrees.

[0013] Preferably, the bottom of the reactor is equipped with a circulation pump.

[0014] Preferably, the electric heating elements are all made of copper-aluminum alloy.

[0015] Preferably, the reactor is equipped with a temperature sensor.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model has a compact structure and strong practicality. By using the stripping tower and the reactor in combination, the steam passes through the layers of tower plates. The ammonia-containing water vapor can be condensed into water on the tower plates and returned to the reactor with heat. The heated tower plates can heat the newly added ammonia water and carbon dioxide, which can make full use of the heat.

[0018] 2. A mixed gas containing ammonium bicarbonate, water, and ammonia enters the tower. After cooling, the ammonium bicarbonate is then reintroduced into the stripping tower, avoiding direct steam discharge and energy loss, and greatly reducing costs.

[0019] 3. No external steam needs to be introduced for heating during the ammonia stripping process, which reduces the overall energy consumption of the stripping tower. Furthermore, through the aforementioned waste heat utilization mechanism, the discharged steam can be used to heat the newly added raw materials, thereby greatly improving the energy utilization rate of the equipment and benefiting its practical use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the tower plate of this utility model. Detailed Implementation

[0022] like Figure 1-2 As shown, the specific implementation adopts the following technical solution:

[0023] Example 1

[0024] A high-efficiency, energy-saving, large-scale reaction tower for preparing high-purity basic copper carbonate includes a stripping tower 1 and a reaction vessel 2. The stripping tower 1 has several trays 3, an outlet 4 at its top, a feeding tray 5 below the outlet 4, a gas sensor 6 between the feeding tray 5 and the outlet 4, and a feed inlet 7 on the side of the feeding tray 5. An eccentric stirrer 8 is installed inside the reaction vessel 2. A heating jacket 9 is provided on the outside of the reaction vessel 2, and an electric heating element 10 is fixedly installed inside the heating jacket. An observation window 11 is provided on the stripping tower 1. Several baffle plates 12 are provided within the trays 3, with gaps between them. Each baffle plate 12 includes a left plate 13 and a right plate 14, which are at a 120-degree angle to each other. A circulating pump 15 is provided at the bottom of the reaction vessel 2. All electric heating elements 10 are made of copper-aluminum alloy. This invention employs a circulating pump structure to refill the reaction liquid discharged along with the basic copper carbonate into the reactor.

[0025] A method for using a high-efficiency, energy-saving, large-scale reaction tower for the preparation of high-purity basic copper carbonate includes the following steps:

[0026] 1. Add a liquid containing copper and ammonia to reactor 2, preheat to a certain temperature, and then enter the stripping deammoniation tower for pyrolysis to release the complexation of ammonia and copper ions. The mixture of ammonia water and ammonium bicarbonate is condensed at the top of the stripping tower 1. A certain concentration of ammonia water is added to replenish the lost ammonia. Carbon dioxide is introduced to carbonize part of the ammonia, keeping the mass concentration of ammonia and ammonium bicarbonate constant, and then the mixture is recycled to the ammonia leaching reactor.

[0027] 2. The slurry containing basic copper carbonate precipitate obtained from the tower bottom is filtered, washed and dried. The dried material is then crushed, sieved through a 100-mesh sieve, analyzed, weighed and packaged to obtain high-purity basic copper carbonate. The basic copper carbonate is then calcined to obtain high-purity active copper oxide.

[0028] 3. Pump ammonia carbonate solution into the copper melting tank. When opening the tank, add 18-20 tons of electrolytic copper as a bottom layer. Replenish the solution daily based on production volume. Add a certain amount of ammonium bicarbonate according to the formula to maintain the carbonate content at 100-110 g / L. Cover the tank with the feed cap. After approximately 2 hours of air blowing reaction, pump the solution into the copper melting tank again to a temperature of 50-70℃. React for another 2 hours, then take a sample to analyze the copper (Cu) content. The endpoint is reached when Cu is greater than 85 g / L (time range: 5-12 hours). Close the valve, stop the air blowing, and the copper melting process is complete.

[0029] 4. Ammonia Removal: Open the inlet valve of reactor 2, start the copper plating tank filter pump, and completely pump the solution into reactor 2. Close the inlet valve and filter pump. Turn on the induced draft fan, turn on the automatic switch of the absorption system, and open the relevant valves. Turn on the blower and induced draft fan, and after cooling for 1 hour, turn off the blower. Then, heat the solution, controlling the temperature at 80-100℃. Take a sample after about 2 hours, until the sampled solution has clear layers, becomes colorless and odorless, and the copper content is ≤0.05g / L. At this point, the reaction is terminated.

[0030] 5. Drying: The material is automatically added to a fully automatic centrifuge via an intermediate mixing tank. The centrifuge speed is controlled by a PLC. After feeding, the speed is increased until it reaches 50Hz after 3 minutes. After the product is spun dry, the centrifuge automatically unloads the material, which is then placed into ton bags and added to a flash dryer. The inlet air temperature is controlled at 200-260℃, and the outlet air temperature is not lower than 50℃ for drying.

[0031] The beneficial effects of this utility model are:

[0032] 1. This utility model has a compact structure and strong practicality, and can carry out large-scale production without interruption. By using the stripping tower and the reactor in combination, the steam passes through layers of tower plates, and the ammonia-containing water vapor can be condensed into water on the tower plates and returned to the reactor with heat. The heated tower plates can heat the newly added ammonia water and carbon dioxide, which can make full use of heat.

[0033] 2. A mixed gas containing ammonium bicarbonate, water, and ammonia enters the tower. After cooling, the ammonium bicarbonate is then reintroduced into the stripping tower, avoiding direct steam discharge and energy loss, and greatly reducing costs.

[0034] 3. No external steam needs to be introduced for heating during the ammonia stripping process, which reduces the overall energy consumption of the stripping tower. Furthermore, through the aforementioned waste heat utilization mechanism, the discharged steam can be used to heat the newly added raw materials, thereby greatly improving the energy utilization rate of the equipment and benefiting its practical use.

[0035] Since the largest cost in the current production process is the cost of steam use, that is, the energy cost, this utility model adopts the above-mentioned structure and innovatively transforms the tower and reactor. It has continuous and stable production, can process a large amount of raw materials at one time, and also has the characteristics of low energy consumption and low wastewater and waste gas volume, which has significant economic and social benefits.

Claims

1. A high-efficiency energy-saving reaction tower kettle for large-scale preparation of high-purity basic copper carbonate, characterized in that: The apparatus includes a stripping tower and a reactor. The stripping tower has several trays and a gas outlet at the top. A feeding tray is located below the gas outlet, and a gas sensor is located between the feeding tray and the gas outlet. A feed inlet is located on the side of the feeding tray, and an eccentric stirrer is located inside the reactor. ​ 2. The reaction tower kettle for large-scale preparation of high-purity basic copper carbonate with high efficiency and energy saving according to claim 1, characterized in that: The reactor is equipped with a heating jacket on the outside, and an electric heating tube is fixedly installed inside the jacket.

3. The reaction tower kettle for large-scale preparation of high-purity basic copper carbonate with high efficiency and energy saving according to claim 2, characterized in that: The stripping tower is equipped with an observation window.

4. The reaction tower kettle for large-scale preparation of high-purity basic copper carbonate with high efficiency and energy saving according to claim 3, characterized in that: The tower plate is provided with several baffle plates with gaps between them. The baffle plates include a left plate and a right plate, and the left plate and the right plate are at an angle of 90-140 degrees.

5. The reaction tower kettle for large-scale preparation of high-purity basic copper carbonate with high efficiency and energy saving according to claim 4, characterized in that: The reactor is equipped with a circulation pump at the bottom.

6. The high-efficiency energy-saving reaction tower kettle for large-scale preparation of high-purity basic copper carbonate according to claim 2, characterized in that: The electric heating elements are all made of copper-aluminum alloy.

7. The reaction tower kettle for large-scale preparation of high-purity basic copper carbonate with high efficiency and energy saving according to claim 6, characterized in that: The reactor is equipped with a temperature sensor.

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