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CN-121992197-A - Smelting method of high-silicon manganese alloy

CN121992197ACN 121992197 ACN121992197 ACN 121992197ACN-121992197-A

Abstract

The application provides a smelting method of a high-silicon manganese alloy, which comprises the steps of smelting evenly mixed smelting raw materials added into an ore smelting furnace through the ore smelting furnace to obtain a first high-silicon manganese alloy liquid, acquiring the resistance value of an electrode of the ore smelting furnace in real time in the smelting process of the evenly mixed smelting raw materials added into the ore smelting furnace through the ore smelting furnace, adjusting the voltage of the secondary side of a transformer of the ore smelting furnace and the current of the electrode of the ore smelting furnace according to the resistance value of the electrode of the ore smelting furnace to ensure that the resistance value of the electrode of the ore smelting furnace is larger than a first preset threshold value, and transferring the first high-silicon manganese alloy liquid into a ladle for standing for a first preset time and then skimming the slag to obtain a second high-silicon manganese alloy liquid, and pouring the second high-silicon manganese alloy liquid into a die to obtain a cast ingot. The application has the advantages of lower power consumption cost in the smelting process of the high-silicon manganese alloy and improvement of the purity of the high-silicon manganese alloy finished product.

Inventors

  • LI QIN
  • XIANG HUA
  • ZHOU LETAO
  • LI JIANGUO
  • WEI BAOJUN

Assignees

  • 察右前旗永安恒大特种合金有限责任公司

Dates

Publication Date
20260508
Application Date
20260227

Claims (10)

  1. 1. The smelting method of the high-silicon manganese alloy is characterized by comprising the following steps of: Obtaining smelting raw materials for smelting high-silicon manganese alloy, and mixing the smelting raw materials to obtain uniformly mixed smelting raw materials; adding the uniformly mixed smelting raw materials into a submerged arc furnace, starting the submerged arc furnace, and smelting the uniformly mixed smelting raw materials added into the submerged arc furnace through the submerged arc furnace to obtain a first high-silicon-manganese alloy liquid; In the process of smelting the uniformly mixed smelting raw materials added into the ore smelting furnace through the ore smelting furnace, acquiring the resistance value of an electrode of the ore smelting furnace in real time, and adjusting the voltage of the secondary side of a transformer of the ore smelting furnace and the current of the electrode of the ore smelting furnace according to the resistance value of the electrode of the ore smelting furnace to ensure that the resistance value of the electrode of the ore smelting furnace is larger than a first preset threshold value, wherein the furnace alkalinity of the ore smelting furnace is a second preset threshold value in the process; transferring the first high-silicon-manganese alloy liquid into a ladle, standing for a first preset time, and then skimming slag to obtain a second high-silicon-manganese alloy liquid; And pouring the second high-silicon manganese alloy liquid into a mould to cast ingots, and demoulding after cooling to obtain a high-silicon manganese alloy finished product.
  2. 2. The method for smelting high silicon-manganese alloy according to claim 1, wherein the smelting raw materials comprise 90-110 parts by weight of manganese ore, 65-85 parts by weight of coke, 85-105 parts by weight of silica, 2-5 parts by weight of limestone, 1-3 parts by weight of fluorite, 10-15 parts by weight of dolomite and 0.6-1.0 parts by weight of a resistor micro-regulator.
  3. 3. The method for smelting high-silicon silicomanganese alloy according to claim 2, wherein the resistance micro-regulator is a mixture of petroleum coke powder, graphite powder and silica powder; Wherein the weight ratio of the petroleum coke powder to the graphite powder to the silica powder is (0.1-0.3), the weight ratio of the graphite powder to the silica powder is (0.3-0.5), the weight ratio of the graphite powder to the silica powder is (0.2-0.4), the particle sizes of the petroleum coke powder and the silica powder are 0.1-0.3 mu m, and the particle sizes of the graphite powder are larger than the particle sizes of the petroleum coke powder and the silica powder.
  4. 4. The smelting method of the high-silicon silicomanganese alloy according to claim 2, wherein the grade of the manganese ore is 37% -42%; The mass content of SiO 2 in the silica is more than 97%; The mass content of fixed carbon in the coke is more than 83.5 percent.
  5. 5. The method for smelting high silicon-manganese alloy according to claim 2, wherein the resistivity of the coke is more than 1400 Ω -m.
  6. 6. The method for smelting high silicon-manganese alloy according to claim 1, wherein the smelting raw materials added thereto and uniformly mixed by the submerged arc furnace comprises the steps of: Setting the voltage of the secondary side of the submerged arc furnace transformer and the current of the submerged arc furnace electrode to be a first preset voltage and a first preset current respectively, so that the uniformly mixed smelting raw materials are smelted in the submerged arc furnace with the first preset voltage and the first preset current for a second preset time; The first preset voltage is 180V-220V, the first preset current is 9100A-10800A, and the second preset time is 160 min-180 min; Setting the voltage of the secondary side of the submerged arc furnace transformer and the current of the submerged arc furnace electrode to be a second preset voltage and a second preset current respectively, so that the uniformly mixed smelting raw materials smelted in the first stage continue smelting in the submerged arc furnace with the second preset voltage and the second preset current for a third preset time to obtain the first high-silicon silicomanganese alloy liquid; The second preset voltage is 240V-300V, the second preset current is 10% -15% of the first preset current, and the third preset time is 30 min-50 min.
  7. 7. The method for smelting high silicon-manganese alloy according to claim 1, wherein the first preset threshold value is 0.70 to 0.73.
  8. 8. The method for smelting high-silicon-manganese alloy according to claim 1, wherein the second preset threshold value is 0.70 to 0.75.
  9. 9. The method for smelting high-silicon-manganese alloy according to claim 1, wherein the first preset time is 8min to 15min.
  10. 10. The method for smelting high silicon-manganese alloy according to any one of claims 1 to 9, wherein inert gas is introduced into the ladle for a fourth preset time during the process of transferring the first high silicon-manganese alloy liquid into the ladle and standing; and the fourth preset time is 3-5 min, and the first high-silicon manganese alloy liquid is transferred into the ladle to start timing.

Description

Smelting method of high-silicon manganese alloy Technical Field The application relates to the technical field of high-silicon-manganese alloy smelting, in particular to a smelting method of high-silicon-manganese alloy. Background In the traditional high-silicon manganese alloy smelting process, alternating current is generally adopted for production. However, in actual smelting, as the inductance exists in the alternating current circuit, when the resistance in the submerged arc furnace is lower than a certain threshold (for example, the resistance is smaller than 0.7 omega), the inductance is obviously increased, so that the electric energy loss of the submerged arc furnace is increased, and the electric energy consumption in the smelting process of the high-silicon manganese alloy is higher, so that the production cost is increased. In addition, the control of key parameters such as resistance, voltage, current, in-furnace alkalinity and the like in the traditional high-silicon-manganese alloy smelting process often lacks system optimization, and the fluctuation of silicon and manganese element components in the high-silicon-manganese alloy finished product is easy to cause, so that the purity of the final high-silicon-manganese alloy finished product is influenced. Disclosure of Invention The application provides a smelting method of high-silicon manganese alloy, which is used for solving the technical problems described in the background technology. In order to solve the technical problems, the application adopts the following technical scheme: the application provides a smelting method of a high-silicon manganese alloy, which comprises the following steps: Obtaining smelting raw materials for smelting high-silicon manganese alloy, and mixing the smelting raw materials to obtain uniformly mixed smelting raw materials; adding the uniformly mixed smelting raw materials into a submerged arc furnace, starting the submerged arc furnace, and smelting the uniformly mixed smelting raw materials added into the submerged arc furnace through the submerged arc furnace to obtain a first high-silicon-manganese alloy liquid; In the process of smelting the uniformly mixed smelting raw materials added into the ore smelting furnace through the ore smelting furnace, acquiring the resistance value of an electrode of the ore smelting furnace in real time, and adjusting the voltage of the secondary side of a transformer of the ore smelting furnace and the current of the electrode of the ore smelting furnace according to the resistance value of the electrode of the ore smelting furnace to ensure that the resistance value of the electrode of the ore smelting furnace is larger than the first preset threshold value, wherein the alkalinity in the furnace of the ore smelting furnace is a second preset threshold value in the process; transferring the first high-silicon-manganese alloy liquid into a ladle, standing for a first preset time, and then skimming slag to obtain a second high-silicon-manganese alloy liquid; And pouring the second high-silicon manganese alloy liquid into a mould to cast ingots, and demoulding after cooling to obtain a high-silicon manganese alloy finished product. Optionally, the smelting raw materials comprise 90-110 parts by weight of manganese ore, 65-85 parts by weight of coke, 85-105 parts by weight of silica, 2-5 parts by weight of limestone, 1-3 parts by weight of fluorite, 10-15 parts by weight of dolomite and 0.6-1.0 part by weight of resistor micro-regulator. Optionally, the resistance micro-regulator is a mixture of petroleum coke powder, graphite powder and silica powder; Wherein the weight ratio of the petroleum coke powder to the graphite powder to the silica powder is (0.1-0.3), the weight ratio of the graphite powder to the silica powder is (0.3-0.5), the weight ratio of the graphite powder to the silica powder is (0.2-0.4), the particle sizes of the petroleum coke powder and the silica powder are 0.1-0.3 mu m, and the particle sizes of the graphite powder are larger than the particle sizes of the petroleum coke powder and the silica powder. Optionally, the grade of the manganese ore is 37% -42%; The mass content of SiO 2 in the silica is more than 97%; The mass content of fixed carbon in the coke is more than 83.5 percent. Optionally, the resistivity of the coke is greater than 1400 Ω·m. Optionally, smelting the smelting raw materials added into the ore smelting furnace through the ore smelting furnace, wherein the smelting raw materials are uniformly mixed, and specifically comprises the following steps: Setting the voltage of the secondary side of the submerged arc furnace transformer and the current of the submerged arc furnace electrode to be a first preset voltage and a first preset current respectively, so that the uniformly mixed smelting raw materials are smelted in the submerged arc furnace with the first preset voltage and the first preset current for a second preset time; The f