Electric melting furnace, electric melting method and method for producing rock wool by using electric smelting red mud

[0093] Example 1

[0094] like figure 1 As shown, the present invention provides an electric melting furnace, including an electric melting furnace body, a control system 4 and a power supply system, the control system 4 is electrically connected with the power supply system, and the power supply system includes an ignition device 3, and the electric melting furnace The body is structurally matched with the ignition device 3 , and the ignition device 3 includes a graphite electrode 31 and an electrode automatic adjustment mechanism 33 .

[0095] The graphite electrode 31 is a three-phase graphite electrode 31, and the discharge points of the three-phase graphite electrode 31 are respectively electrically connected with resistance wires; the electrode automatic adjustment mechanism 33 includes an electrode lifting mechanism 331, and the electrode lifting mechanism 331 is connected with the three The phase graphite electrodes 31 are electrically connected, and the electrode liftin

[0105] Embodiment 2

[0106] On the basis of Embodiment 1, in order to adapt the electric melting furnace to the production of inorganic fibers, especially the production of rock wool with red mud as the main material, the following improvements are made, such as Figure 1-3 As shown, the electric melting furnace body includes a furnace body 1 and a furnace cover 2; the furnace body 1 is provided with a furnace top distribution device 22, and the furnace top distribution device 22 communicates with the feeding device through a material conveying device; The side wall of the furnace body 1 is provided with a discharge port; the furnace cover 2 is provided with a passage hole through which the graphite electrode 31 can pass.

[0107] The inner furnace of the furnace body 1 is preferably cylindrical. The design inner diameter is preferably 360 cm, and the melting capacity is 5-8 tons per hour, preferably 6 tons.

[0108] The bottom and the circumference of the furnace body 1 are m

[0136] Embodiment 3

[0137] According to the above embodiment, in order to solve the problem of unbalanced three-phase current when the existing electric melting furnace starts arcing, the present invention provides an electric melting method, which uses the electric melting furnace to process materials, and the steps mainly include:

[0138] 1) Preparation before operation;

[0139] 2) fabric;

[0140] 3) Charge preheating;

[0141] 4) The molten pool is generated;

[0142] 5) ignition device 3 ignites arc;

[0143] 6) Maintain production, form melting rated current, melting rated voltage, melting rated power, and run stably;

[0144] 7) Output the stream, the molten liquid level reaches the set height, open the discharge port, make the molten liquid stream flow out and lead it to the next material processing process.

[0145] Specifically, the pre-operation preparation in step 1) includes three steps of equipment acceptance, pre-operation drying and post-drying inspection