CN112921177A - Efficient smelting method for silicon-manganese alloy - Google Patents
Efficient smelting method for silicon-manganese alloy Download PDFInfo
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Abstract
The invention provides a silicon-manganese alloy high-efficiency smelting method, which is characterized in that washing slag, silicon-manganese alloy slag, smelting dust generated after dust removal of smelting flue gas and pre-ingredients made of alumina and raw materials such as manganese ore are added into an ore-smelting furnace together for smelting, so that on one hand, part of waste slag generated in the silicon-manganese alloy smelting process is effectively treated, and on the other hand, the dried washing slag and the silicon-manganese alloy slag are beneficial to improving the thermodynamic conditions of the ore-smelting furnace in the smelting process and improving the smelting efficiency. The washing slag and the smelting dust contain a large amount of calcium oxide and magnesium oxide, the requirement for adjusting the alkalinity in the submerged arc furnace can be met, and the drying washing slag, the silicon-manganese alloy slag and the smelting dust contain a large amount of silicon and manganese, so that the recovery rate of the silicon and the manganese can be obviously improved after the silicon and the manganese are remilled. Meanwhile, the dry washing slag and the smelting dust have higher melting points, and the melting point of the slag can be effectively improved by adding the aluminum oxide, so that the furnace temperature is increased, and the reduction reaction rate in the submerged arc furnace is accelerated.
Description
Technical Field
The invention belongs to the technical field of metallurgical chemical industry, and particularly relates to a high-efficiency smelting method of a silicon-manganese alloy.
Background
The silicon-manganese alloy is an alloy composed of manganese, silicon, iron, a small amount of carbon and other elements, is an iron alloy with wide application and large yield, is a common compound deoxidizer for steelmaking, and is a reducing agent for producing medium-low carbon ferromanganese and producing metal manganese by an electro-silicothermic method. Silicomanganese is produced by smelting manganese ore (including manganese-rich slag) and manganese oxide and silicon dioxide in silica by reducing them simultaneously with carbon in a submerged arc furnace. The traditional production process of the silicon-manganese alloy generates a large amount of waste gas and waste slag, and causes serious pollution to the atmospheric environment and the soil environment, so enterprises have to invest huge treatment cost, but the effect is little.
At present, the treatment method of smelting slag mainly comprises landfill, raw material for manufacturing cement or partial recycling. Because smelting slag contains a large amount of substances with recovery values such as calcium oxide, magnesium oxide, silicon, manganese and the like, the smelting slag has lower economic value when directly buried or used as a raw material for manufacturing cement. In the process for smelting the silicomanganese alloy by replacing dolomite through remelting silicomanganese slag provided by the prior art, the silicomanganese slag is subjected to certain pretreatment and is remelted, so that dolomite for adjusting the alkalinity of the submerged arc furnace is replaced by calcium oxide and magnesium oxide with higher content in the silicomanganese slag, and the recovery rate of manganese can be improved to a certain degree.
The disposal mode to hot stove high temperature flue gas in ore deposit is mostly direct emission after removing dust, causes serious pollution to the atmospheric environment, and extravagant heat energy. And the high-temperature flue gas is directly used for dedusting, so that the service life of dedusting equipment is greatly shortened. In the prior art, high heat energy of high-temperature flue gas of the submerged arc furnace is used as a heat source medium of the boiler, but the mode not only needs to input too high equipment cost, but also silicon-containing dust in the high-temperature flue gas is attached to the wall of the boiler and is difficult to treat, the heat exchange efficiency of the boiler is influenced, and potential safety hazards are brought to safe operation of the boiler. Moreover, the mode can not effectively reduce harmful waste gas contained in the flue gas of the submerged arc furnace, and still cause serious atmospheric environmental pollution.
Disclosure of Invention
In view of the above, the invention provides a high-efficiency smelting method for a silicon-manganese alloy, which aims to solve the technical problems that the recovery rate of manganese is not high and smelting slag and smelting waste gas are difficult to treat in the smelting process of the silicon-manganese alloy in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a silicon-manganese alloy high-efficiency smelting method comprises the steps of mixing a pre-prepared material accounting for 8% -20% of the total feeding amount of raw materials with manganese ore, manganese-rich slag, silica and coke, and smelting in a closed ore-smelting furnace; wherein the pre-ingredients comprise dry washing slag, silicon-manganese alloy slag, smelting dust and aluminum oxide.
Preferably, the pre-ingredients comprise 100 to 200 parts by weight of dry washing slag, 50 to 100 parts by weight of silicon-manganese alloy slag, 20 to 50 parts by weight of smelting dust and 5 to 10 parts by weight of alumina.
Preferably, the efficient smelting method of the silicon-manganese alloy comprises the following steps:
a. mixing the pre-ingredients with manganese ore, manganese-rich slag, silica and coke, and smelting in a closed ore-smelting furnace, wherein the top of the ore-smelting furnace generates reducing flue gas, and the bottom of the furnace generates smelting slag;
b. mixing and burning the reduction flue gas generated in the step a, oxygen-enriched air and auxiliary fuel gas to generate high-temperature dust-containing flue gas;
c. mixing the smelting slag generated in the step a with industrial water, washing with water, and draining to obtain washing slag;
d. c, exchanging heat between the water washing slag obtained in the step c and the high-temperature dust-containing flue gas generated in the step b, mixing the water washing slag until the water content is less than 3% to obtain dry water washing slag, and performing heat exchange and cooling on the high-temperature dust-containing flue gas to form medium-temperature dust-containing flue gas;
e. fully mixing the dry washing slag obtained in the step d with silicomanganese alloy slag, smelting dust and aluminum oxide according to a preset proportion to obtain a pre-prepared mixture, wherein the smelting dust is obtained by performing dry dust removal on low-temperature dust-containing flue gas obtained in the step f;
f. and e, fully contacting the pre-prepared mixture obtained in the step e with the medium-temperature dust-containing flue gas formed in the step d for heat exchange to obtain the pre-prepared material and the low-temperature dust-containing flue gas.
Preferably, the dedusting mode of the low-temperature dust-containing flue gas obtained in the step f is cyclone separation dedusting.
Preferably, in step f, the obtained pre-formulation is subjected to a granulation operation, obtaining a granulated pre-formulation.
Preferably, the particulate pre-formulation has an average particle size of from 0.5cm to 1 cm.
Preferably, the pre-ingredient is granulated by using the washing slag as a wet material.
According to the technical scheme, the invention provides a high-efficiency smelting method of silicon-manganese alloy, which has the beneficial effects that: the dry washing slag generated in the smelting process of the silicon-manganese alloy, the silicon-manganese alloy slag generated in the crushing process of the silicon-manganese alloy, the smelting dust generated after the flue gas at the top of the submerged arc furnace is dedusted and the alumina are mixed to prepare the pre-ingredient, and the pre-ingredient and the raw material for smelting the silicon-manganese alloy are added into the submerged arc furnace together for smelting, so that on one hand, part of waste slag generated in the smelting process of the silicon-manganese alloy is effectively treated, on the other hand, the dry washing slag and the silicon-manganese alloy slag are beneficial to improving the thermodynamic conditions of the submerged arc furnace in the smelting process, and the smelting efficiency is improved. Meanwhile, the dried washing slag and the smelting dust contain a large amount of calcium oxide and magnesium oxide, so that the requirement for adjusting the alkalinity in the submerged arc furnace can be met, and the dried washing slag, the silicon-manganese alloy slag and the smelting dust contain a large amount of silicon and manganese, so that the recovery rate of silicon and manganese, especially manganese, can be remarkably improved after the silicon and manganese are remilled. Meanwhile, the dry washing slag and the smelting dust have higher melting points, and the melting point of the slag can be effectively improved by adding the aluminum oxide, so that the furnace temperature is increased, and the reduction reaction rate in the submerged arc furnace is accelerated.
Detailed Description
The technical solution and the technical effects of the present invention are further described in detail below.
In a specific embodiment, a silicon-manganese alloy high-efficiency smelting method comprises the steps of mixing a pre-prepared material accounting for 8-20% of the total feeding amount of raw materials with manganese ore, manganese-rich slag, silica and coke, and smelting in a closed ore-smelting furnace; wherein the pre-ingredients comprise dry washing slag, silicon-manganese alloy slag, smelting dust and aluminum oxide.
Specifically, the pre-ingredients comprise, by weight, 100-200 parts of dry washing slag, 50-100 parts of silicomanganese alloy slag, 20-50 parts of smelting dust and 5-10 parts of alumina.
Specifically, the efficient smelting method of the silicon-manganese alloy comprises the following steps:
s101, mixing the pre-ingredients with manganese ore, manganese-rich slag, silica and coke, and smelting in a closed ore heating furnace, wherein reduction flue gas is generated at the top of the ore heating furnace, and smelting slag is generated at the bottom of the furnace.
The raw materials required for the production of one ton of silicon-manganese alloy, for example, have the following composition in parts by weight: the weight of manganese ore (calculated by average manganese content of 28.5%) is 2000 Kg-2100 Kg, manganese-rich slag (calculated by average manganese content of 36%) 700 Kg-800 Kg, silica 250 Kg-280 Kg, coke 450 Kg-550 Kg and pre-burden 50 Kg-100 Kg. The raw materials are weighed and mixed evenly, and are sent into a 25000KVA closed silicomanganese alloy ore smelting furnace for smelting, and the smelting is kept at the smelting temperature of 1600-2000 ℃ for 3-6 h.
In order to reduce the unit consumption and the discharge capacity of the smelting slag, it is preferable to use high-quality manganese ore, for example, at least one of kotedawa ore, Australian ore, south African sinter ore, semi-carbonate high-grade ore and Qinghai ore, for example, a mixture ratio of kotedawa ore with high manganese content and Australian ore with low manganese content is used, so that the smelting efficiency is improved, the production cost is reduced, and the discharge capacity of the slag is reduced.
In the smelting process, high-temperature reducing flue gas is generated at the top of the submerged arc furnace, the temperature of the reducing flue gas is as high as 650-750 ℃, the reducing flue gas mainly contains carbon monoxide (about 74-83%) and a small amount of carbon dioxide (about 2-10%), the reducing flue gas also contains a large amount of dust, and after the dust is separated, the obtained smelting dust contains 26% of carbon, 38% of calcium oxide and 12% of metal oxide, wherein the carbon is accounting for the total weight of the smelting dust.
S102, mixing and burning the reduction flue gas generated in the step S101 with oxygen-enriched air and auxiliary fuel gas to generate high-temperature dust-containing flue gas.
Because the high-temperature reducing flue gas generated from the top of the submerged arc furnace has the temperature of 650-750 ℃ and contains carbon monoxide accounting for 74-83% of the total volume, the heat can be directly recycled and used for heating external media or used as a medium for feeding and preheating. The method can also be used for heat exchange media of boilers to obtain low-pressure or medium-pressure steam or boiler water and other public engineering raw materials. However, direct heat exchange directly leads to carbon monoxide to be discharged outside, and a large amount of silicon oxide fine particles contained in dust in flue gas can be attached to the wall of the heat exchange container, so that the cleaning is difficult, and potential safety hazards exist.
As a preferable embodiment, the high-temperature reducing flue gas generated from the top of the submerged arc furnace is incinerated with air and a small amount of auxiliary fuel gas in a closed incinerator to oxidize carbon monoxide in the reducing flue gas into carbon dioxide, and the temperature of the high-temperature dust-containing flue gas containing 7-10% of carbon dioxide generated after incineration is about 450-550 ℃ due to the action of air. The high-temperature dust-containing flue gas is collected and led out through a pipeline so as to further recover heat in the flue gas and reduce the dust content and the carbon dioxide content in the flue gas. In order to further fully incinerate and convert carbon monoxide and other combustible components in the reduction flue gas, the air is preferably oxygen-enriched air, i.e. the oxygen content in the air is about 23-25%.
On the other hand, in the oxygen-rich state, carbon particles and metal oxide in a low valence state (such as ferrous oxide) in the smoke dust in the reduction flue gas are fully oxidized to form carbon dioxide and high valence state metal oxide, so that the carbon content in the reduction flue gas is reduced, the probability that a large number of carbon particles with small particles, light weight, large specific surface area and strong adsorption performance are adsorbed on the wall of the incinerator and the wall of the dust removal equipment is reduced, and the equipment maintenance rate is reduced.
And S103, mixing and washing the smelting slag generated in the step S101 with industrial water, and draining to obtain washing slag.
And (3) injecting the molten liquid alloy into a double-step ladle, calming for 5-8 minutes, and discharging slag. And pouring the liquid alloy in the double-step ladle to obtain the silicon-manganese alloy. And flushing the smelting slag at the bottom of the submerged arc furnace into a slag washing pool, contacting and mixing the smelting slag with water, washing slag, and draining to generate washing slag with the water content of 15-20%. The washing slag contains more than 30% of calcium oxide and magnesium oxide and more than 7% of manganese.
S104, exchanging heat between the water washing slag obtained in the step S103 and the high-temperature dust-containing flue gas generated in the step S102, mixing and drying the water washing slag until the water content is less than 3% to obtain dry water washing slag, and performing heat exchange and cooling on the high-temperature dust-containing flue gas to form medium-temperature dust-containing flue gas.
And (4) contacting the water washing slag with the high-temperature dust-containing flue gas obtained in the step (S102) for heat exchange, on one hand, recycling waste heat in the high-temperature dust-containing flue gas, and reducing the water content in the water washing slag to obtain dry water washing slag with the water content of less than 3%. On the other hand, substances such as calcium oxide, magnesium oxide and the like contained in the washing slag are used for absorbing and adsorbing carbon dioxide and part of dust in the high-temperature dust-containing flue gas, so that the content of carbon dioxide in the discharged flue gas is reduced, and the comprehensive carbon emission is reduced.
Preferably, the washed slag and the high-temperature dust-containing flue gas are subjected to contact heat exchange in a washed slag drying device, the washed slag drying device comprises a contact heat exchange roller, a spiral shoveling plate is arranged on the inner wall of the contact heat exchange roller, and the contact heat exchange roller is hollow to form a contact heat exchange cavity. One end of the contact heat exchange roller is provided with a wet washing slag feeding hole, the other end of the contact heat exchange roller is provided with a dry washing slag discharging hole, one end of the contact heat exchange roller close to the dry washing slag discharging hole is provided with a high-temperature dust-containing smoke inlet, and one end of the contact heat exchange roller close to the wet washing slag feeding hole is provided with a medium-temperature dust-containing smoke outlet. The high-temperature dust-containing flue gas is subjected to contact heat exchange in the contact heat exchange roller, on one hand, wet washing slag is dried through the high-temperature dust-containing flue gas, and on the other hand, smoke dust and carbon dioxide in the high-temperature dust-containing flue gas are absorbed through calcium oxide and magnesium oxide contained in the washing slag, so that the energy is recycled, and meanwhile, the emission of the carbon dioxide and the smoke dust is reduced.
And S105, fully mixing the dry washing slag obtained in the step S104 with the silicon-manganese alloy slag, smelting dust and aluminum oxide according to a preset proportion to obtain a pre-prepared mixture, wherein the smelting dust is obtained by performing dry dust removal on the low-temperature dust-containing flue gas obtained in the step f.
For example, the pre-ingredients comprise 100 parts of dry washing slag, 100 parts of silicon-manganese alloy slag, 20 parts of smelting dust and 5 parts of alumina by weight.
For example, the pre-ingredients comprise 100 parts of dry washing slag, 100 parts of silicon-manganese alloy slag, 50 parts of smelting dust and 10 parts of alumina by weight.
For example, the pre-ingredients comprise 200 parts of dry washing slag, 50 parts of silicon-manganese alloy slag, 20 parts of smelting dust and 5 parts of alumina by weight.
For example, the pre-ingredients comprise 200 parts of dry washing slag, 50 parts of silicon-manganese alloy slag, 50 parts of smelting dust and 10 parts of aluminum oxide by weight.
For example, the pre-ingredients comprise 150 parts of dry washing slag, 80 parts of silicon-manganese alloy slag, 20 parts of smelting dust and 5 parts of alumina by weight.
For example, the pre-ingredients comprise 150 parts of dry washing slag, 80 parts of silicon-manganese alloy slag, 30 parts of smelting dust and 10 parts of alumina by weight.
S106, the prepared mixture obtained in the step S105 is in full contact with the medium-temperature dust-containing flue gas formed in the step S104 for heat exchange, and the prepared mixture and the low-temperature dust-containing flue gas are obtained. And (2) the pre-prepared mixture is contacted with the medium-temperature dusty flue gas for heat exchange, so that on one hand, heat carried in the medium-temperature dusty flue gas is further recycled, the pre-prepared mixture is sintered and preheated, and on the other hand, the pre-prepared mixture is used for further reducing the content of the dioxide tower and the content of dust in the medium-temperature dusty flue gas. In the contact reaction process, the dry washing slag, the smelting dust and the alumina have larger specific surface areas and larger porosity, so that the capture force of the alumina on dust in medium-temperature dust-containing flue gas can be effectively improved, and the dust content in the discharged flue gas is effectively reduced.
In a preferred embodiment, when the pre-mixed material is prepared, wet washing slag accounting for 10% -30% of the total addition amount of the washing slag is added into the pre-mixed material, so that the wet washing slag is utilized to mix and bond the materials, the materials are sintered into block-shaped premix in the middle-temperature dust-containing flue gas contact process, then the block-shaped premix is crushed into particles with the particle size close to that of raw materials such as ore and the like, and granular pre-mixed materials are obtained, wherein the average particle size of the granular pre-mixed materials is 0.5 cm-1 cm, so that the materials can uniformly descend in the ore-smelting furnace, and the probability of furnace collapse in the ore-smelting furnace is reduced.
Further, the dust removal mode of the low-temperature dust-containing flue gas obtained in the step S106 is cyclone separation dust removal, so as to further reduce the dust content in the discharged flue gas, and simultaneously separate to obtain the smelting dust.
It is worth to be noted that, in the above process, a part of the smelting dust is captured when the high-temperature dust-containing flue gas is actually contacted with the wet washing slag, a part of the smelting dust is captured when the medium-temperature dust-containing flue gas is contacted with the pre-prepared mixture, and the balance is added with the smelting dust obtained by removing dust from the final low-temperature dust-containing flue gas.
The technical solution and technical effects of the present invention are further described below by specific examples.
Examples 1 to 6
2000Kg of manganese ore (with the average manganese content of 28.5 percent), 800Kg of manganese-rich slag (with the average manganese content of 36 percent), 250Kg of silica, 450Kg of coke and 50Kg of pre-ingredients are uniformly mixed, and are fed into a 25000KVA closed silicomanganese alloy ore heating furnace for smelting, and the smelting temperature is kept between 1600 ℃ and 2000 ℃ for smelting for 3h to 6 h.
Wherein, in the pre-batching, the weight parts of each substance are shown in the following table:
TABLE 1 weight parts of each material in the pre-formulations of examples 1-6
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | |
| Washing slag (share) | 100 | 100 | 200 | 200 | 150 | 150 |
| Silicomanganese alloy slag (fraction) | 100 | 100 | 50 | 50 | 80 | 80 |
| Aluminium oxide (in) | 5 | 10 | 5 | 10 | 5 | 10 |
| Smelting dust (fraction) | 20 | 50 | 20 | 50 | 20 | 30 |
Wherein, the preparation process of the pre-ingredient is as follows: reducing smoke generated by the submerged arc furnace is combusted with fuel gas and oxygen enrichment to generate high-temperature dust-containing smoke, the high-temperature dust-containing smoke is contacted with water washing slag to obtain dry water washing slag and medium-temperature dust-containing smoke, the dry water washing slag, wet water washing slag, silicomanganese alloy slag, alumina and smelting dust are mixed and then contacted with the medium-temperature dust-containing smoke to be sintered into blocky premix, and the blocky premix is crushed into granular premix with the grain diameter of 0.5 cm-1 cm.
Example 7
2000Kg of manganese ore (with the average manganese content of 28.5 percent), 800Kg of manganese-rich slag (with the average manganese content of 36 percent), 250Kg of silica, 450Kg of coke and 100Kg of pre-ingredients are uniformly mixed, and are fed into a 25000KVA closed silicomanganese alloy ore heating furnace for smelting, and the smelting temperature is kept between 1600 ℃ and 2000 ℃ for smelting for 3h to 6 h.
Wherein, in the pre-burdening, by weight, 100 parts of water-containing washing slag, 100 parts of silicomanganese alloy slag, 5 parts of aluminum oxide and 20 parts of smelting dust.
Wherein, the preparation process of the pre-ingredient is as follows: reducing smoke generated by the submerged arc furnace is combusted with fuel gas and oxygen enrichment to generate high-temperature dust-containing smoke, the high-temperature dust-containing smoke is contacted with water washing slag to obtain dry water washing slag and medium-temperature dust-containing smoke, the dry water washing slag, wet water washing slag, silicomanganese alloy slag, alumina and smelting dust are mixed and then contacted with the medium-temperature dust-containing smoke to be sintered into blocky premix, and the blocky premix is crushed into granular premix with the grain diameter of 0.5 cm-1 cm.
In the embodiment, compared with the traditional smelting process and the flue gas treatment process, the manganese content in the washing slag generated after smelting is detected, the manganese content in the washing slag is reduced to about 6%, and the manganese recovery rate is improved compared with the traditional smelting process. In the smelting process, the times of furnace collapse in the smelting furnace are counted, in the embodiment, the times of furnace collapse in the smelting furnace is reduced from 5-6 times per furnace to 3-4 times per furnace, and the use of the pre-burdening is beneficial to reducing the frequency of furnace collapse in the smelting furnace. Meanwhile, the dust content and the carbon dioxide content of the discharged flue gas are detected, the dust content is obviously reduced, the carbon content in the dust is obviously reduced, the carbon dioxide emission is obviously reduced, and the discharged flue gas almost does not contain carbon monoxide.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. A silicon-manganese alloy efficient smelting method is characterized in that pre-prepared materials accounting for 8% -20% of the total raw material feeding amount are mixed with manganese ore, manganese-rich slag, silica and coke, and smelting is carried out in a closed ore-smelting furnace; wherein the pre-ingredients comprise dry washing slag, silicon-manganese alloy slag, smelting dust and aluminum oxide.
2. The efficient smelting method of silicon-manganese alloy according to claim 1, wherein the pre-ingredients comprise, by weight, 100-200 parts of dry washing slag, 50-100 parts of silicon-manganese alloy slag, 20-50 parts of smelting dust and 5-10 parts of alumina.
3. The efficient smelting method of the silicon-manganese alloy according to claim 1, characterized by comprising the following steps:
a. mixing the pre-ingredients with manganese ore, manganese-rich slag, silica and coke, and smelting in a closed ore-smelting furnace, wherein the top of the ore-smelting furnace generates reducing flue gas, and the bottom of the furnace generates smelting slag;
b. mixing and burning the reduction flue gas generated in the step a, oxygen-enriched air and auxiliary fuel gas to generate high-temperature dust-containing flue gas;
c. mixing the smelting slag generated in the step a with industrial water, washing with water, and draining to obtain washing slag;
d. c, exchanging heat between the water washing slag obtained in the step c and the high-temperature dust-containing flue gas generated in the step b, mixing the water washing slag until the water content is less than 3% to obtain dry water washing slag, and performing heat exchange and cooling on the high-temperature dust-containing flue gas to form medium-temperature dust-containing flue gas;
e. fully mixing the dry washing slag obtained in the step d with silicomanganese alloy slag, smelting dust and aluminum oxide according to a preset proportion to obtain a pre-prepared mixture, wherein the smelting dust is obtained by performing dry dust removal on low-temperature dust-containing flue gas obtained in the step f;
f. and e, fully contacting the pre-prepared mixture obtained in the step e with the medium-temperature dust-containing flue gas formed in the step d for heat exchange to obtain the pre-prepared material and the low-temperature dust-containing flue gas.
4. The efficient smelting method for the silicon-manganese alloy according to claim 3, wherein the dust removal mode of the low-temperature dust-containing flue gas obtained in the step f is cyclone separation dust removal.
5. The efficient Si-Mn alloy smelting process according to claim 3, wherein in step f, the obtained pre-burden is granulated to obtain a granulated pre-burden.
6. The efficient smelting method for the silicon-manganese alloy according to claim 5, wherein the average grain size of the granular pre-burden is 0.5 cm-1 cm.
7. The efficient smelting method for the silicon-manganese alloy according to claim 5, characterized in that the pre-burden is granulated by using the washing slag as a wet material.
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| CN114606404A (en) * | 2022-03-09 | 2022-06-10 | 石横特钢集团有限公司 | Method for producing manganese-silicon alloy by using steel slag to replace light-burned dolomite |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695596A (en) * | 2013-12-05 | 2014-04-02 | 广西敏诚矿业有限公司 | Recycling method for producing silicomanganese alloy and medium and low carbon ferromanganese |
| CN106435310A (en) * | 2016-10-14 | 2017-02-22 | 贵州镇远鸿丰新材料有限公司 | Technology for using rocking furnace silicon-thermal method for refining manganese silicon aluminum alloy |
| WO2017100808A1 (en) * | 2015-12-08 | 2017-06-15 | Mintek | Manganese waste slag treatment |
-
2019
- 2019-12-07 CN CN201911245556.6A patent/CN112921177B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695596A (en) * | 2013-12-05 | 2014-04-02 | 广西敏诚矿业有限公司 | Recycling method for producing silicomanganese alloy and medium and low carbon ferromanganese |
| WO2017100808A1 (en) * | 2015-12-08 | 2017-06-15 | Mintek | Manganese waste slag treatment |
| CN106435310A (en) * | 2016-10-14 | 2017-02-22 | 贵州镇远鸿丰新材料有限公司 | Technology for using rocking furnace silicon-thermal method for refining manganese silicon aluminum alloy |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114606404A (en) * | 2022-03-09 | 2022-06-10 | 石横特钢集团有限公司 | Method for producing manganese-silicon alloy by using steel slag to replace light-burned dolomite |
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