Variable direct-current loop iron alloy ore heat stove

A DC circuit, ferroalloy technology, applied in the field of variable DC circuit ferroalloy submerged arc furnace, can solve the problems of hot anode at the end, electrode soft and hard breaking accident, rapid consumption of anode electrode, etc., so as to reduce load fluctuation and ensure reliable product quality , good stability

Active Publication Date: 2018-12-14
大连重工机电设备成套有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the smelting process of the submerged arc furnace, the smelting current is as high as 100kA or even greater. The smelting current is the main source of heat energy for electrode roasting. Under the condition of equal pressure and discharge speed, the roasting near the electrode holder is similar, but due to the relatively fast consumption of the anode electrode and the terminal The hot anode is more serious, and the electrode soft and hard breakage accidents often occur

Method used

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  • Variable direct-current loop iron alloy ore heat stove
  • Variable direct-current loop iron alloy ore heat stove
  • Variable direct-current loop iron alloy ore heat stove

Examples

Experimental program
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Effect test

Embodiment 1

[0053] The variable direct current circuit ferroalloy submerged arc furnace provided by the present invention is based on a standard design of a double reverse star rectifier circuit with a balance reactor, and its connection mode is as follows Figure 1-2 As shown, the submerged arc furnace is mainly composed of submerged arc furnace body (1), connecting conductor (2), smelting electrode A1 (3), smelting electrode A2 (4), smelting electrode B1 (5), smelting electrode B2 (6) , a rectifying and voltage regulating power supply system (10), a DC knife switch S11 (11), a DC knife switch S12 (12), a DC knife switch S21 (13), and a DC knife switch S22 (14). Wherein, the connecting conductor (2) is mainly composed of a water-cooled copper tube, a rectangular copper plate, a copper plate soft connection, and a copper rod. The rectification and voltage regulation power supply system (10) is composed of a voltage regulation and rectification transformer (7), a connecting copper plate (8...

Embodiment 2

[0063] Embodiment 1 takes the 4-electrode circular furnace as a model, and designs the submerged arc furnace structure, such as Figure 4-8 As shown, (on the basis of Embodiment 1), the present invention also provides several other forms of electrode distribution that are also applicable to the present invention. Figure 4 It is the floor plan of the variable DC circuit 6-electrode rectangular submerged arc furnace, Figure 5 It is the floor plan of the variable DC circuit 6-electrode circular submerged arc furnace, Figure 6 Layout plan of variable DC circuit 6-electrode ultra-high power rectangular submerged arc furnace, Figure 7 Layout plan of 8-electrode rectangular submerged arc furnace with variable DC circuit, Figure 8 It is a plan layout of a 10-electrode rectangular submerged arc furnace with a variable DC circuit. The above-mentioned electrode arrangement methods all follow the distribution rule of smelting electrodes with opposite polarity around any electrode....

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Abstract

The invention provides a variable direct-current loop iron alloy ore heat stove. The variable direct-current loop iron alloy ore heat stove mainly comprises an ore heat stove body, N sets of rectifying voltage-regulating power supply systems, and a redundant mutually-backup group, wherein N pairs of smelting electrodes extend into the ore heat stove body for heating, melting and smelting cores; the N sets of rectifying voltage-regulating power supply systems are connected with the smelting electrodes for separately controlling polarity switching of the smelting electrodes; the redundant mutually-backup group is arranged on a connecting conductor for converting control objectives of each set of the rectifying voltage-regulating power supply systems. When the variable direct-current loop iron alloy ore heat stove works, N sets of the rectifying voltage-regulating power supply systems separately control polarity switching of N pairs of the smelting electrodes to realize uniform roasting of each pair of smelting electrodes. The technical scheme adopted by the invention solves the problem that accidents such as electrode breakage in a production process due to the fact that roasting forpositive and negative electrodes is out of step in the prior art.

Description

technical field [0001] The invention relates to the technical field of high-power submerged arc furnace smelting, in particular to the application of ferroalloy direct current smelting industry, in particular to a variable direct current circuit ferroalloy submerged arc furnace. Background technique [0002] At present, due to the lack of vertical positive and negative electrode smelting technologies in industrial applications, some related smelting technologies are still in the process of exploration, but this furnace type has achieved initial results in the existing very rare production lines, and the advantages of energy saving and environmental protection are obvious. , Compared with the AC electric furnace, it has the advantages of high power factor, small short-circuit reactance, no skin effect, etc., good powder adaptability, and stable production furnace conditions; compared with the bottom electrode technology DC furnace, there is no bottom electrode consumption, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B14/06F27B14/14
CPCF27B14/06F27B14/14Y02P10/25
Inventor 张宏程孙大庆王晓斌张宏李海峰谷端玉
Owner 大连重工机电设备成套有限公司
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