Production process of high-stability pre-dissolving type slagging agent

Abstract

The invention relates to the field of production of pre-dissolving type slagging agents, in particular to a production process of a high-stability pre-dissolving type slagging agent. The production process aims to solve the technical problems that in the prior art, a rotary kiln cannot bear corrosion of sulfur, and matched cooling equipment, dust removal equipment, desulfurization equipment and the like are extremely easy to damage. The production technology of the high-stability pre-dissolving type slagging agent comprises the following steps of S1, solid waste drying, S2, brick pressing, S3, high-temperature firing in a tunnel kiln, S4, cooling and S5, crushing into particles. A tunnel kiln is used for firing, a plurality of processing technologies are added compared with a rotary kiln, however, both the yield and the stability of a finished product are greatly improved, the previous rotary kiln is low in yield, high in equipment corrosion, easy to form a kiln in the production process, high in product density, poor in air permeability and relatively high in environment-friendly emission, and the existing tunnel kiln is high in yield and low in cost. And the product is low in density, good in air permeability, environment-friendly and light in emission pressure, and does not form kiln caking in the production process.

Description

Technical Field

[0001] The invention relates to the field of pre-dissolving slag-removing agent production, and in particular to a production process of a pre-dissolving slag-removing agent with high stability. Background Art

[0002] Pre-dissolved slag remover is an important material used in metal smelting and steelmaking. It can help remove oxides, sulfides and other undesirable impurities on the metal surface and improve the quality and formability of the metal. It is more environmentally friendly without any irritating smoke when used. It has a high slag removal speed and good slag stabilization effect.

[0003] In the past, the pre-dissolved slag-removing agent was made by directly putting solid waste into the rotary kiln and firing it at high temperature. The finished product was directly turned into particles of different sizes. During the processing, due to the high sulfur content, the rotary kiln could not withstand the corrosion of sulfur, and the supporting cooling equipment, dust removal equipment, desulfurization equipment, etc. were easily damaged. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a highly stable pre-dissolving slag-removing agent production process, which aims to solve the technical problems that the rotary kiln in the prior art cannot withstand the corrosion of sulfur and the supporting cooling equipment, dust removal equipment, desulfurization equipment, etc. are extremely easy to be damaged.

[0005] The technical scheme of the present invention is: a production process of a high-stability pre-dissolving slag-removing agent, the weight percentage of the components of which are: 40% to 60% of calcium fluoride sludge, 10% to 30% of coal gangue, and 10% to 20% of a regulator.

[0006] A production process of a high-stability pre-dissolving slag-removing agent, characterized in that it comprises the following steps:

[0007] S1: Solid waste drying: use hot air to dry the calcium fluoride sludge, then put it into containers or store it in a professional raw material warehouse;

[0008] At the same time, the gangue is put into the crusher to be crushed into powder, and then placed in another container or stored in a professional raw material warehouse for storage;

[0009] Weigh the calcium fluoride sludge and coal gangue according to the formula ratio, pour them into the mixing equipment, add the proportion of the regulator, and stir vigorously to ensure uniform composition;

[0010] S2: Pressing into bricks. After the mixed material is output, the mixed powder is converted into a solid product through a static press, and it is formed into the shape of a brick. The brick is also made by using a high-temperature roasting kiln to use the waste heat to dry the blank, so that its surface is hardened and the structural strength is enhanced;

[0011] S3: Enter the tunnel kiln for high-temperature firing. Then send this batch of bricks into the tunnel kiln for high-temperature roasting. The temperature of the tunnel kiln is set at 900℃~1100℃ and fired for 1~2 hours;

[0012] S4: Cooling: After being transported out, the bricks are placed in a cool place to cool naturally to 20℃~30℃;

[0013] S5: Crushing into particles The brick-shaped slag-removing agent is put into the crushing chamber of the jaw crusher. Under the rotation of the eccentric shaft, it is squeezed and rubbed by the movable jaw plate and the fixed jaw plate, thereby achieving a crushing effect and crushing the brick-shaped slag-removing agent into small particles;

[0014] S6: Finished product packaging.

[0015] Preferably, the regulator in S1 is quicklime or soda ash.

[0016] As a preferred method, the S1 coal gangue fine crushing adopts a jaw crusher; the diameter of the coal gangue powder particles in S1 is 50 to 100 meshes.

[0017] Preferably, the finished product of S6 pre-dissolved slag-removing agent is packaged in ton bags.

[0018] Preferably, the finished product packaging specification of S6 pre-dissolved slag-removing agent is 1 ton / bag.

[0019] Preferably, the diameter of small particles of S5 pre-dissolving slag-removing agent is 2CM to 8CM.

[0020] Beneficial effects of the present invention:

[0021] The present invention uses tunnel kiln for firing, which has several more processing steps than rotary kiln, but both the output and the stability of the finished product are greatly improved;

[0022] 1. The use of rotary kilns has low output, is highly corrosive to equipment, is prone to kiln formation during the production process, has high product density and poor air permeability, and has relatively high environmental emissions;

[0023] 2. The use of tunnel kilns has high output, extremely low corrosion to equipment, no kiln formation during the production process, low product density and good air permeability, and light environmental emission pressure;

[0024] Compared with the traditional pre-dissolved slag-forming agent, the pre-dissolved slag-forming agent produced by the present invention has higher stability after process improvement, can maintain its effect unchanged for a longer time, and improves the reliability and durability of the treatment effect. The slag-forming agent processed into small particles can react chemically with non-metallic impurities such as oxides and sulfides on the metal surface more quickly, and has a good purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1What is shown is a schematic flow chart of the production process of the present invention; DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Example 1

[0028] A production process of a high-stability pre-dissolving slag-removing agent, characterized in that the weight percentages of its components are: 70% calcium fluoride sludge, 20% coal gangue, and 10% regulator.

[0029] A production process of a high-stability pre-dissolving slag-removing agent, characterized in that it comprises the following steps:

[0030] S1: Solid waste drying: use hot air to dry the calcium fluoride sludge, then put it into containers or store it in a professional raw material warehouse;

[0031] At the same time, the gangue is put into the crusher to be crushed into powder, and then placed in another container or stored in a professional raw material warehouse for storage;

[0032] Weigh the calcium fluoride sludge and coal gangue according to the formula ratio, pour them into the mixing equipment, add the proportion of the regulator, and stir vigorously to ensure uniform composition;

[0033] S2: Pressing into bricks. After the mixed material is output, the mixed powder is converted into a solid product through a static press, and it is formed into the shape of a brick. The brick is also made by using a high-temperature roasting kiln to use the waste heat to dry the blank, so that its surface is hardened and the structural strength is enhanced;

[0034] S3: Enter the tunnel kiln for high-temperature firing. Then send this batch of bricks into the tunnel kiln for high-temperature roasting. The temperature of the tunnel kiln is set at 1100℃ and fired for 1 hour;

[0035] S4: Cooling: After being transported out, the bricks are placed in a cool place to cool naturally to 30°C;

[0036] S5: Crushing into particles The brick-shaped slag-removing agent is put into the crushing chamber of the jaw crusher. Under the rotation of the eccentric shaft, it is squeezed and rubbed by the movable jaw plate and the fixed jaw plate, thereby achieving a crushing effect and crushing the brick-shaped slag-removing agent into small particles;

[0037] S6: Finished product packaging.

[0038] Example 2

[0039] A production process of a high-stability pre-dissolving slag-removing agent, characterized in that the weight percentages of its components are: 60% calcium fluoride sludge, 15% coal gangue, and 25% regulator.

[0040] A production process of a high-stability pre-dissolving slag-removing agent, characterized in that it comprises the following steps:

[0041] S1: Solid waste drying: use hot air to dry the calcium fluoride sludge, then put it into containers or store it in a professional raw material warehouse;

[0042] At the same time, the gangue is put into the crusher to be crushed into powder, and then placed in another container or stored in a professional raw material warehouse for storage;

[0043] Weigh the calcium fluoride sludge and coal gangue according to the formula ratio, pour them into the mixing equipment, add the proportion of the regulator, and stir vigorously to ensure uniform composition;

[0044] S2: Pressing into bricks. After the mixed material is output, the mixed powder is converted into a solid product through a static press, and it is formed into the shape of a brick. The brick is also made by using a high-temperature roasting kiln to use the waste heat to dry the blank, so that its surface is hardened and the structural strength is enhanced;

[0045] S3: Enter the tunnel kiln for high-temperature firing. Then send this batch of bricks into the tunnel kiln for high-temperature roasting. The tunnel kiln temperature is set at 900℃ and fired for 2 hours;

[0046] S4: Cooling: After being transported out, the bricks are placed in a cool place to cool naturally to 20°C;

[0047] S5: Crushing into particles The brick-shaped slag-removing agent is put into the crushing chamber of the jaw crusher. Under the rotation of the eccentric shaft, it is squeezed and rubbed by the movable jaw plate and the fixed jaw plate, thereby achieving a crushing effect and crushing the brick-shaped slag-removing agent into small particles;

[0048] S6: Finished product packaging.

[0049] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A production process of a high-stability pre-dissolving slag-removing agent, characterized in that: The weight percentage of its components is: 50% to 70% of calcium fluoride sludge, 10% to 30% of coal gangue, and 10% to 25% of regulator.

2. A high-stability pre-dissolving slag-removing agent production process according to claim 1, characterized in that: The following steps are involved: S1: Solid waste drying: use hot air to dry the calcium fluoride sludge, then put it into containers or store it in a professional raw material warehouse; At the same time, the gangue is put into the crusher to be crushed into powder, and then placed in another container or stored in a professional raw material warehouse for storage; Weigh the calcium fluoride sludge and coal gangue according to the formula ratio, pour them into the mixing equipment, add the proportion of the regulator, and stir vigorously to ensure uniform composition; S2: Pressing into bricks. After the mixed material is output, the mixed powder is converted into a solid product through a static press, and it is formed into the shape of a brick. The brick is also made by using a high-temperature roasting kiln to use the waste heat to dry the blank, so that its surface is hardened and the structural strength is enhanced; S3: Enter the tunnel kiln for high-temperature firing. Then send this batch of bricks into the tunnel kiln for high-temperature roasting. The temperature of the tunnel kiln is set at 900℃~1100℃ and fired for 1~2 hours; S4: Cooling: After being transported out, the bricks are placed in a cool place to cool naturally to 20℃~30℃; S5: Crushing into particles The brick-shaped slag-removing agent is put into the crushing chamber of the jaw crusher. Under the rotation of the eccentric shaft, it is squeezed and rubbed by the movable jaw plate and the fixed jaw plate, thereby achieving a crushing effect and crushing the brick-shaped slag-removing agent into small particles; S6: Finished product packaging.

3. A high-stability pre-dissolving slag-removing agent production process according to claim 2, characterized in that: The regulator in S1 is quicklime or soda ash.

4. The production process of a high-stability pre-dissolving slag-removing agent according to claim 2, characterized in that: S1 coal gangue fine crushing adopts jaw crusher; the diameter of S1 coal gangue powder particles is 50-100 mesh.

5. The production process of a high-stability pre-dissolving slag-removing agent according to claim 2, characterized in that: The finished product of S6 pre-dissolved slag-removing agent is packed in ton bags.

6. The production process of a high-stability pre-dissolving slag-removing agent according to claim 2, characterized in that: The packaging specification of S6 pre-dissolved slag-removing agent finished product is 1 ton / bag.

7. The production process of a high-stability pre-dissolving slag-removing agent according to claim 2, characterized in that: The small particle diameter of S5 pre-dissolved slag-removing agent is 2CM~8CM.

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