Production method of active metallurgical lime

Abstract

The invention relates to the technical field of active metallurgical lime production, and discloses an active metallurgical lime production method, which comprises: S1, raw material preparation, storage and pretreatment; s2, mixing powder preparation and preheating treatment; s3, calcining treatment; s4, cooling and separating; and S5, finished product preparation and quality control. According to the production method of the active metallurgical lime, the continuity and automation of the production process are realized by integrating and optimizing each production link, such as raw material preparation, mixing and pulverizing, preheating, calcining, cooling and separating and finished product preparation, so that the production efficiency is remarkably improved, and meanwhile, the combustion improver and the limestone powder are uniformly mixed, so that the production efficiency is improved. And high-efficiency calcination and cooling treatment are adopted, so that high activity and high purity of the product are ensured, and the requirements of the high-end metallurgical industry are met.

Description

Technical Field

[0001] The invention relates to the technical field of active metallurgical lime production, in particular to a method for producing active metallurgical lime. Background Art

[0002] Active metallurgical lime is a material widely used in the metallurgical industry, mainly used in desulfurization, dephosphorization and other processes. The traditional production method of active metallurgical lime usually includes steps such as raw material preparation, crushing, calcination, cooling and screening.

[0003] However, the traditional raw material preparation and crushing process often lacks refined processing, resulting in more impurities in the raw materials, affecting the subsequent calcination and product purity, and there are problems such as low thermal efficiency and high energy consumption. At the same time, it is difficult to ensure the uniform decomposition of limestone. Therefore, a production method of activated metallurgical lime is proposed. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a method for producing active metallurgical lime, which has the advantages of improving production efficiency and enhancing product activity and purity, and solves the problems of low raw material production efficiency and low product performance.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of improving production efficiency and enhancing product activity and purity, the present invention provides the following technical solution: a method for producing active metallurgical lime, comprising:

[0008] Raw material preparation, storage and pre-processing;

[0009] Mixing milling and preheating treatment;

[0010] Calcination treatment;

[0011] Cooling and separation;

[0012] Finished product preparation and quality control.

[0013] As a preferred technical solution of the present invention, the raw material preparation, storage and pretreatment include a raw material conveyor, which is responsible for the mining and transportation of limestone raw materials. An adjustment bracket is provided at the bottom of the raw material conveyor. A crusher is connected to the right side of the raw material conveyor, and the crusher is used for removing impurities and crushing limestone.

[0014] As a preferred technical solution of the present invention, the mixed powder making and preheating treatment includes:

[0015] A dispensing mixer is fixedly installed at the bottom of the crusher, and the dispensing mixer can add a combustion aid and mix it with the limestone powder processed by the crusher. A preheater is fixedly connected to the right side of the dispensing mixer, and the preheater can preheat the mixture.

[0016] As a preferred technical solution of the present invention, the calcination treatment comprises:

[0017] The right side of the preheater is fixedly connected with a rotary kiln, and the mixture of limestone powder and combustion aid preheated by the preheater is sent into the rotary kiln for calcination. The high-temperature flue gas transfers heat to the limestone powder through the wall of the rotary kiln, causing it to decompose.

[0018] As a preferred technical solution of the present invention, the cooling and separation comprises:

[0019] A vertical cooler is fixedly connected to the right side of the rotary kiln, a cyclone separator is arranged on the top of the vertical cooler, and a vibrating screening pipe is connected to the right side of the vertical cooler. The calcined lime is sent into the vertical cooler for cooling treatment, and the cooled lime is separated and screened by the cyclone separator and the vibrating screening pipe to remove dust and impurities therein.

[0020] As a preferred technical solution of the present invention, the finished product preparation and quality control include:

[0021] The right side of the vibrating screening tube is fixedly connected with a packaging machine, and the packaging machine packages the screened and crushed lime to obtain the final active metallurgical lime product.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the present invention provides a method for producing active metallurgical lime, which has the following beneficial effects:

[0024] The production method of active metallurgical lime realizes the continuity and automation of the production process by integrating and optimizing various production links, such as raw material preparation, mixed powder making, preheating, calcination, cooling and separation, and finished product preparation, thereby significantly improving production efficiency. At the same time, the uniform mixing of combustion aid and limestone powder, as well as efficient calcination and cooling treatment, ensure the high activity and purity of the product, meeting the needs of the high-end metallurgical industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the method of the present invention;

[0026] Figure 2 It is a schematic diagram of the structure of the device of the present invention;

[0027] In the figure: 1. Raw material conveyor; 2. Adjustment bracket; 3. Crusher; 4. Batching mixer; 5. Preheater; 6. Rotary kiln; 7. Cyclone separator; 8. Vertical cooler; 9. Vibrating screen pipe; 10. Packaging machine. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] See also Figure 1-2 , a method for producing active metallurgical lime, comprising the following steps:

[0032] S1 Raw material preparation, storage and pretreatment.

[0033] Limestone with a calcium content of more than 90% is selected as the raw material. At the same time, the content of other impurity elements such as silicon, magnesium, iron, etc. is required to be as low as possible to ensure the quality and stability of the final product. The limestone raw material is then washed with water to remove impurities, dried, and then crushed into limestone powder of a certain particle size to reduce the impurity content in the raw material.

[0034] The raw material is transported to the production site by means of a raw material conveyor 1, and then the limestone raw material is crushed to a certain particle size using a crusher 3 for subsequent mixing and calcination.

[0035] Through the coordinated use of the raw material conveyor 1 and the adjustment bracket 2, accurate mining and transportation of the limestone raw material are achieved. At the same time, the introduction of the crusher 3 effectively removes impurities in the raw material and crushes the limestone to a particle size suitable for subsequent processes, thereby significantly improving the processing accuracy of the raw material.

[0036] S2 mixed powder making and preheating treatment mainly includes combustion aid addition and mixing and mixed preheating.

[0037] Adding and mixing the combustion aid: Add the combustion aid [such as potassium oxalate, potassium citrate, etc.] to the crushed limestone powder in a certain proportion, and use a mixer 4 to fully mix it to ensure that the combustion aid is evenly distributed in the limestone powder.

[0038] Preheating of the mixture: The mixed limestone powder and combustion-supporting agent mixture is sent to the preheater 5 for preheating treatment. The preheating temperature and time can be determined according to the production equipment and process conditions to improve the calcination efficiency.

[0039] The dispensing mixer 4 can evenly mix the combustion aid with the limestone powder to ensure even heat transfer during the calcination process, while the preheater 5 preheats the mixture, reducing energy consumption during the calcination process and improving the decomposition efficiency of the limestone.

[0040] S3 calcination treatment.

[0041] Fuel Preparation and Combustion: Prepares coke oven gas or other fuel and feeds it into the combustion system where it mixes with air and burns to produce high temperature flue gas.

[0042] Limestone calcination: The preheated limestone powder and the combustion-supporting agent mixture are fed into the rotary kiln 6 for calcination. During the calcination process, the limestone decomposes at high temperature to generate calcium oxide and carbon dioxide. The calcination temperature and time need to be strictly controlled to ensure that the limestone is fully decomposed and highly active calcium oxide is generated.

[0043] As a calcining device, the rotary kiln 6 has the advantages of high thermal efficiency and uniform calcination, and can fully transfer the heat in the high-temperature flue gas to the limestone powder, causing it to undergo a sufficient decomposition reaction, thereby greatly improving the calcination efficiency.

[0044] S4 cooling and separation is mainly divided into lime cooling and lime separation and screening.

[0045] Lime cooling: The calcined lime is sent to the vertical cooler 8 for cooling. During the cooling process, the residual heat of the lime is removed by blowing in cold air or circulating water, and the temperature is reduced to below a certain range.

[0046] Lime separation and screening: The cooled lime is separated and screened using cyclone separators 7, vibrating screening tubes 9 and other equipment to remove dust and impurities, and adjust the particle size and chemical composition to meet customer needs.

[0047] The vertical cooler 8 ensures that the calcined lime is adequately cooled, while the combined use of the cyclone separator 7 and the vibrating screen tube 9 effectively removes dust and impurities in the product, thereby improving the purity and quality stability of the product.

[0048] S5 Finished product preparation and quality control.

[0049] Finished product preparation: The screened and crushed lime is packaged and stored to obtain the final active metallurgical lime product. During the packaging process, attention should be paid to moisture-proof, anti-pollution and labeling management of the product.

[0050] Quality Control: Strict quality control is carried out on raw materials, semi-finished products and finished products, including inspection and testing of chemical composition, physical properties and activity, to ensure that product quality meets relevant standards and customer needs.

[0051] By using the packaging machine 10, accurate packaging of the screened and crushed lime is achieved, ensuring that the appearance and quality of the final product meet the standards. At the same time, the quality control measures throughout the process ensure the stability and consistency of product quality.

[0052] In addition, the waste gas generated during the calcination process is collected and treated, and harmful substances such as dust, sulfur dioxide and nitrogen oxides in the waste gas are removed through dust collectors, desulfurization and denitrification equipment.

[0053] The beneficial effects of the above embodiment are:

[0054] By integrating and optimizing various production links, such as raw material preparation, mixing and pulverizing, preheating, calcination, cooling and separation, and finished product preparation, the continuity and automation of the production process are achieved, thereby significantly improving production efficiency. At the same time, uniform mixing of combustion aid and limestone powder, as well as efficient calcination and cooling treatment, ensure the high activity and purity of the product, meeting the needs of the high-end metallurgical industry.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for producing active metallurgical lime, characterized in that: include: Raw material preparation, storage and pre-processing; Mixing milling and preheating treatment; Calcination treatment; Cooling and separation; Finished product preparation and quality control.

2. The method for producing active metallurgical lime according to claim 1, characterized in that: The raw material preparation, storage and pretreatment comprises a raw material conveyor (1), which is responsible for the mining and transportation of limestone raw materials. An adjustment bracket (2) is arranged at the bottom of the raw material conveyor (1). A crusher (3) is connected to the right side of the raw material conveyor (1), and the crusher (3) is used for removing impurities and crushing limestone.

3. The method for producing active metallurgical lime according to claim 2, characterized in that: The mixed powder making and preheating treatment comprises: A dispensing mixer (4) is fixedly installed at the bottom of the crusher (3). The dispensing mixer (4) can add a combustion aid and mix it with the limestone powder processed by the crusher (3). A preheater (5) is fixedly connected to the right side of the dispensing mixer (4). The preheater (5) can preheat the mixture.

4. The method for producing active metallurgical lime according to claim 3, characterized in that: The calcination process comprises: The right side of the preheater (5) is fixedly connected to a rotary kiln (6), and the mixture of limestone powder and combustion aid preheated by the preheater (5) is sent into the rotary kiln (6) for calcination. The high-temperature flue gas transfers heat to the limestone powder through the wall of the rotary kiln (6), causing a decomposition reaction to occur.

5. The method for producing active metallurgical lime according to claim 4, characterized in that: The cooling and separation include: The right side of the rotary kiln (6) is fixedly connected to a vertical cooler (8), the top of the vertical cooler (8) is provided with a cyclone separator (7), and the right side of the vertical cooler (8) is connected to a vibrating screening pipe (9), and the calcined lime is sent to the vertical cooler (8) for cooling treatment. The cooled lime is separated and screened by the cyclone separator (7) and the vibrating screening pipe (9) to remove dust and impurities therein.

6. The method for producing active metallurgical lime according to claim 5, characterized in that: The finished product preparation and quality control include: The right side of the vibrating screening tube (9) is fixedly connected to a packaging machine (10), and the packaging machine (10) packages the screened and crushed lime to obtain a final active metallurgical lime product.

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