CN116730618A - A kind of curb stone using high-temperature slag as raw material and its production process - Google Patents

Abstract

The invention discloses a production process of curb stones using high-temperature slag as raw material and curb stones produced according to the process. In this production process, high-temperature liquid slag from the manganese alloy smelting industry is added to a movable electric furnace, and modified materials are added, fully homogenized, cast into a mold, and crystallized and annealed in a shuttle kiln to obtain a road edge. stone. The production process of the present invention directly uses the molten slag in the high-temperature liquid state in the smelting industry for further production, effectively utilizing its large amount of heat, thereby achieving significant energy-saving effects, and the production process is relatively simple and has good With its industrial feasibility and high production capacity, it can recover manganese alloy smelting slag quickly and in large quantities with low energy consumption, so it also plays a very good environmental role.

Description

A kind of curb stone using high-temperature slag as raw material and its production process

Technical field

The present invention relates to the technical field of industrial waste recycling, and in particular to a curb stone using high-temperature molten slag as raw material and its production process.

Background technique

In the field of alloy smelting, the process of manganese alloy smelting will produce a large amount of high-temperature waste slag. The main components of the slag include SiO ₂ , Al ₂ O ₃ , CaO, MgO, MnO and other substances, which still have certain utilization value. Moreover, the discharge temperature of slag is above 1400°C, and each ton of slag contains heat equivalent to 60kg of standard coal. How to effectively combine the material of high-temperature slag and the huge heat energy it contains for waste recycling and reuse, which can not only fully tap the remaining economic value of high-temperature slag, but also reduce the production of industrial waste, thereby reducing pollution and protecting the environment. Therefore, it is very necessary to recycle and utilize the large amount of high-temperature waste residue generated during the smelting process of manganese alloy by combining its material composition and high-temperature characteristics.

At present, the more conventional method is to use high-temperature waste residue from manganese alloy smelting to produce products such as granular cotton, mineral wool boards (strips), and crystallized glass plates. However, these products themselves can only process a small part of the waste residue, and the waste utilization rate is low and cannot meet the requirements. Due to the demand for high-temperature waste slag recycling in the industrial production process of manganese alloy smelting, a large amount of waste slag is still directly air-cooled or water-cooled, resulting in a large amount of waste of material and heat, and also increasing the cost of pollution control.

Contents of the invention

In view of the above existing problems, the technical purpose of the present invention is to utilize the material composition and high heat characteristics of manganese alloy smelting high-temperature waste slag to develop a process and corresponding products that can recover a large amount of manganese alloy smelting high-temperature waste slag, and which has industrial feasibility and Good economy.

The present invention is realized through the following technical solutions:

The first aspect of the technical content specifically relates to a production process of curb stones using high-temperature slag as raw material, which includes the following steps:

S1: Add high-temperature slag to the movable electric furnace, and the high-temperature slag is high-temperature liquid slag;

S2: Add a modifier material to the high-temperature molten slag, and the modifier material is melted at high temperature and fully mixed with the high-temperature molten slag to obtain a modifier material;

S3: Operate the movable electric furnace to cast the liquid tempered material into the mold through the movable launder;

S4: Send the cast mold into the shuttle kiln, and the tempering material is crystallized and annealed in the mold to obtain the curb stone.

Wherein, the high-temperature slag is the high-temperature liquid slag remaining in the manganese alloy smelting industry. In steps S1 and S2, the movable electric furnace keeps the liquid in the furnace warm to a temperature of no less than 1200°C. In step S2, The weight ratio of the high-temperature slag and the modified material is 5: (1-2).

As mentioned above, the present invention provides a method for recovering high-temperature liquid slag in the manganese alloy smelting industry. During the smelting process of manganese alloy, the molten slag is in a high-temperature liquid state of about 1400°C-1500°C. At this time, the liquid high-temperature slag is added to the movable electric furnace and controlled by the heat preservation of the movable electric furnace. At no less than 1200°C, since the high-temperature slag itself has a temperature of about 1400°C, it only requires a small additional input of energy to complete. Therefore, this method makes full use of the high-temperature characteristics of the slag and has a good energy-saving effect. By adding modified materials and blending, the curb stone material with ideal properties can be obtained, and finally the curb stone product can be obtained by molding it in a mold. The production process of this method is relatively simple, can be produced continuously, has good industrial feasibility, and can process a large amount of manganese alloy smelting waste residue to obtain curb stone products with certain economic value, so it has good economic efficiency and environmental protection sex.

Furthermore, in the modified material, the Al2O3 content is greater than 40%, and the SiO2 content is greater than 45%. The conditioning material composed of this substance can well control the properties of the final product, namely the curb stone.

Furthermore, the modified material is in the form of granules with a particle size of 3-20 mm. The granular modified material with smaller particle size is conducive to improving the melting efficiency of the modified material, thereby effectively utilizing the heat of high-temperature slag and reducing the additional energy supplement of the movable electric furnace, thereby achieving better energy-saving effects.

Furthermore, in step S2, the components of the conditioning material are detected, and the proportion of the high-temperature slag and the conditioning material is dynamically adjusted according to the components of the conditioning material, so that the component content of the conditioning material finally satisfies: _SiO2 : 40%-55%, _Al2O3 : 3%-10%, CaO: 25%-35% _, MgO: 5%-10%, MnO: 3%-6%, _Fe2O3 : _0.2 %-0.8%, other metal oxides: 1%-6%. By dynamically detecting and adjusting the ratio of the high-temperature manganese slag and the modified material during the melting process, a modified material with a relatively fixed component content can be obtained, that is, a final product with stable quality and optimal comprehensive performance can be obtained.

Furthermore, in step S2, the components of the conditioning material are detected by fluorescence analysis. Fluorescence analysis can be used to quickly and accurately detect the ingredients and content of seasoning materials, thus achieving the beneficial effect of rapid adjustment.

Furthermore, in step S2, modifying materials are added to the high-temperature slag and homogenized for 0.5-2 hours. This time can ensure that the modified materials are fully dissolved and mixed evenly, and the gas in the solution can be eliminated as much as possible to ensure the quality of the final product. At the same time, it can avoid the increase in energy consumption and decrease in production capacity caused by long-term homogenization.

Furthermore, in step S3, there are multiple molds, the movable launder has at least one launder mouth, and the movement of the movable launder causes all the liquid in the movable launder to The tempered material enters any one of the plurality of molds through the spout opening. With this setup, multiple molds can be cast quickly and continuously, thereby improving production efficiency and increasing throughput.

Furthermore, the mold has a box structure with an upper part, and the mold is provided with mold side walls. The mold side walls have a three-layer structure, and are composed of carbon bricks and lightweight insulation bricks in order from the inside to the outside. and cast iron casing. The carbon brick is a layer directly in contact with the liquid conditioning material, which can quickly reduce the surface temperature of the conditioning material, which is beneficial to the demoulding of subsequent products. The lightweight insulation brick is the middle layer and has a small heat transfer coefficient, which is conducive to the crystallization and annealing of the tempered material in the mold at an appropriate rate, thereby improving the quality of the curb stone. The cast iron shell is the outermost layer and mainly plays a supporting role.

Furthermore, the mold is set on a trolley, the trolley moves along a preset trolley rail, and the trolley is preset to move back and forth between the casting position and the shuttle kiln. This setting can improve production efficiency.

In addition, the present invention also relates to the technical content of the second aspect, specifically to curb stones directly produced using the production process described in the technical content of the first aspect.

Through the above arrangement, the present invention provides a curb stone using high-temperature slag as raw material and its production process, which at least has the following beneficial effects:

1. Directly connect to the manganese alloy smelting production process, use liquid high-temperature slag as raw material for the next step of production, and make full use of the huge heat of the high-temperature slag itself without excessive energy supplement, so it has a good energy-saving effect;

2. The production process is relatively simple and can be produced continuously, so it can recover high-temperature slag very effectively and has high productivity;

3. Thanks to point 2, it can also have the beneficial effect of fully recycling industrial waste, reducing the stacking area and disposal work of industrial waste, so it has high environmental value;

4. The mold with a three-layer structure is not easy to deform, does not require preheating, and can operate continuously at high temperatures, which improves reliability and work efficiency and also helps reduce energy consumption.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts. In the attached picture:

Figure 1 is a schematic diagram of the production process and equipment in the embodiment;

Figure 2 is a schematic diagram of the position and structure of the movable electric furnace, the movable launder and the mold in the embodiment;

Figure 3 is a schematic diagram of the external structure of the mold;

Figure 4 is a schematic diagram of the three-layer structure of the outer wall of the mold.

In the attached picture:

1-Mobile electric furnace, 2-Mobile launder, 3-Chute guide rail, 4-Chute frame, 5-Mold, 51-Mold side wall, 52-Mold bottom mold, 53-Lock, 54-Mold Side mold, 55-lightweight insulation bricks, 56-carbon bricks, 57-cast iron shell, 58-refractory bricks, 6-trolley, 7-shuttle kiln, 8-gantry, 9-trolley guide rail.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concepts of the example embodiments. To those skilled in the art. In the present invention, unless otherwise specified, the directional words used such as "up, down, left, and right" usually refer to the up, down, left, and right shown in the drawings; "inside, outside" Refers to the inside and outside relative to the outline of each component itself.

Example

Please refer to Figures 1-4. This embodiment relates to a production process of curb stones using high-temperature slag as raw material and curb stones produced through the production process, which includes the following steps:

S1: Add high-temperature slag to the movable electric furnace 1, where the high-temperature slag is high-temperature liquid slag;

S2: Add a modifier material to the high-temperature molten slag, and the modifier material is melted at high temperature and fully mixed with the high-temperature molten slag to obtain a modifier material;

S3: Operate the movable electric furnace 1 to cast the liquid tempered material into the mold 5 through the movable launder 2;

S4: Send the cast mold 5 into the shuttle kiln 7. The tempered material is crystallized and annealed in the mold 5 to obtain the curb stone.

Among them, the high-temperature slag is the high-temperature liquid slag remaining in the manganese alloy smelting industry, which itself has a temperature of about 1400°C. In steps S1 and S2, the movable electric furnace 1 keeps the liquid in the furnace warm to no longer At a temperature lower than 1200°C, in step S2, the weight ratio of the high-temperature slag and the modified material is 5: (1-2).

In the modified material described in this embodiment: the Al2O3 content is greater than 40%, and the SiO2 content is greater than 45%. The conditioning material composed of this substance can well control the properties of the final product, namely the curb stone. In addition, the modified material is in the form of granules with a particle size of 3-20 mm. The granular modified material with a smaller particle size is conducive to improving the melting efficiency of the modified material, thereby effectively utilizing the heat of high-temperature slag, reducing the additional energy supplement of the movable electric furnace 1, and achieving a better energy-saving effect.

In step S2 of this embodiment, the modifying material is added to the high-temperature slag and homogenized for 0.5-2 hours. During this period, the composition of the modifying material is detected by fluorescence analysis and dynamically adjusted according to the composition of the modifying material. The proportion of the high-temperature slag and the modified material is such that the component content of the modified material finally satisfies: SiO ₂ : 40%-55%, Al ₂ O ₃ : 3%-10%, CaO: 25%- 35%, MgO: 5%-10%, MnO: 3%-6%, Fe ₂ O ₃ : 0.2%-0.8%, other metal oxides: 1%-6%. By dynamically detecting and adjusting the ratio of the high-temperature manganese slag to the modified material during the melting process, a modified material with a relatively fixed component content can be obtained, that is, a final product with stable quality and optimal comprehensive performance can be obtained. At the same time, it can ensure that the modified materials are fully dissolved and mixed evenly, and the gas in the solution can be eliminated as much as possible, ensuring the quality of the final product, and avoiding the increase in energy consumption and decrease in production capacity caused by long-term homogenization.

In step S3 of this embodiment, there are multiple molds 5 , the movable launder 2 has a launder mouth, and the movable launder 2 is arranged on the launder frame 4 . The frame 4 is also preset with launder guide rails 3 . The movable launder 2 is configured to move on the launder guide 4 so that the liquid tempering material in the movable launder 2 enters the plurality of molds 5 through the launder opening. in any one. Through this arrangement, multiple molds 5 can be cast quickly and continuously, thereby improving production efficiency and increasing production capacity.

The mold 5 in this embodiment is a box structure with an upper opening. The mold is provided with mold side walls 51, a mold bottom mold 52, a lock 53, a mold side mold 54, and refractory bricks 58. Among them, the more special ones are: The mold side wall 51 has a three-layer structure, consisting of carbon bricks 56, lightweight insulation bricks 55 and cast iron shell 57 in order from the inside to the outside. Among them: the carbon brick 56 is a layer directly in contact with the liquid conditioning material, which can quickly reduce the surface temperature of the conditioning material, which is beneficial to the demoulding of subsequent products. The lightweight insulation brick 55 is the middle layer and has a small heat transfer coefficient, which is beneficial to the crystallization and annealing of the tempered material in the mold 5 at an appropriate rate, thereby improving the quality of the curb stone. The cast iron shell 57 is the outermost layer and mainly plays a supporting role. The mold 5 is set on a trolley 6, which moves along the trolley guide rail 9. The trolley 6 transports the mold 5 from the casting position through the gantry 8 to the shuttle kiln 7. The shuttle kiln 7 plays a certain role in heat preservation, and the tempered material is crystallized and annealed at an appropriate speed and temperature at this position to obtain the final product curb stone.

The curb stone produced by the process described in this embodiment has a compact structure, fewer internal bubbles, uniform composition, and high strength, so it is durable and not easy to break.

This embodiment provides a method for recovering high-temperature liquid slag in the manganese alloy smelting industry. During the smelting process of manganese alloy, the molten slag is in a high-temperature liquid state of about 1400°C-1500°C. At this time, the liquid high-temperature slag is added to the movable electric furnace 1 and is kept warm by the movable electric furnace 1 It is controlled at no less than 1200°C. Since the high-temperature slag itself has a temperature of about 1400°C, it only requires a small additional input of energy to achieve it. Therefore, this method makes full use of the high-temperature characteristics of the slag and has good energy saving. Effect. By adding modified materials and blending, the curb stone material with ideal properties can be obtained, and finally the curb stone product can be obtained by molding it in the mold 5 . The production process of this method is relatively simple, can be produced in a continuous flow, has good industrial feasibility, and can quickly process a large amount of manganese alloy smelting waste residue to obtain curb stone products with certain economic value, so it also has good economics and environmental protection.

It should be noted that due to space limitations, the present invention does not list all implementations. Referring to the above embodiments, those of ordinary skill in the art can easily imagine various combinations of technical features in different embodiments, and the technical solutions obtained by such combinations obviously also belong to the technical content of the present invention. Similarly, modifications or equivalent substitutions made by those of ordinary skill in the art to the technical solution of the present invention are also included in the technical content recorded in the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims (10)

1. A production process for curb stones using high-temperature slag as raw material, which is characterized in that it includes the following steps: S1: Add high-temperature slag to the movable electric furnace, and the high-temperature slag is high-temperature liquid slag; S2: Add a modifier material to the high-temperature molten slag, and the modifier material is melted at high temperature and fully mixed with the high-temperature molten slag to obtain a modifier material; S3: Operate the movable electric furnace to cast the liquid tempered material into the mold through the movable launder; S4: Send the cast mold into the shuttle kiln, and the tempering material is crystallized and annealed in the mold to obtain the curb stone. Wherein, the high-temperature slag is the high-temperature liquid slag remaining in the manganese alloy smelting industry. In steps S1 and S2, the movable electric furnace keeps the liquid in the furnace warm to a temperature of no less than 1200°C. In step S2, The weight ratio of the high-temperature slag and the modified material is 5: (1-2). 2. The production process according to claim 1, characterized in that in the modified material: the Al ₂ O ₃ content is greater than 40%, and the SiO ₂ content is greater than 45%. 3. The production process according to claim 1, characterized in that the modified material is in the form of granules with a particle size of 3-20 mm. 4. The production process according to claim 1, characterized in that, in step S2, the composition of the conditioning material is detected, and the proportion of the high-temperature slag and the modification material is dynamically adjusted according to the composition of the conditioning material. , so that the component content of the tempering material finally meets: SiO ₂ : 40%-55%, Al ₂ O ₃ : 3%-10%, CaO: 25%-35%, MgO: 5%-10%, MnO: 3%-6%, Fe ₂ O ₃ : 0.2%-0.8%, other metal oxides: 1%-6%. 5. The production process according to claim 4, characterized in that, in step S2, the components of the conditioning material are detected by fluorescence analysis. 6. The production process according to claim 1, characterized in that in step S2, modifying materials are added to the high-temperature molten slag and homogenized for 0.5-2 hours. 7. The production process according to claim 1, characterized in that, in step S3, there are multiple molds, the movable launder has at least one launder opening, and the movable launder moves The liquid tempering material in the movable launder is allowed to enter any one of the plurality of molds through the launder opening. 8. The production process according to claim 1, characterized in that the mold is a box structure with an upper opening, the mold is provided with mold side walls, and the mold side walls are a three-layer structure, arranged from the inside to the top. The outer order is carbon bricks, lightweight insulation bricks and cast iron shell. 9. The production process according to claim 1, characterized in that the mold is arranged on a trolley, the trolley moves along a preset trolley rail, and the trolley is preset in the casting position and shuttle Moving back and forth in the kiln. 10. Curb stone produced according to the production process of any one of claims 1-9.