Carbon conductive slag for electroslag steel smelting

Abstract

The invention provides carbon conductive slag suitable for electroslag steel smelting and a preparation method thereof. The conductive slag is prepared by carbon powder, fluorite and Na2SiO3 water solution, is excellent in electrical conductivity and arc starting performance, can play an important role in the low-titanium-content steel smelting, reduces the waste rate, and improves the production efficiency.

Description

technical field

[0001] The invention relates to a carbonaceous conductive slag suitable for electroslag steel smelting and a preparation method thereof, belonging to the field of electroslag steel smelting. Background technique

[0002] In the current electroslag steel smelting, the method of remelting smelting after arcing slag is widely used. The traditional conductive slag is usually titanium conductive slag. The raw materials of titanium conductive slag are titanium dioxide and fluorite (each accounting for 50%). They are placed in the crystallizer and smelted at high temperature using graphite electrodes, and then cooled and crushed for later use. Titanium conductive slag is widely used because of its stable arc starting and convenient operation. With the advancement of science and technology, the quality requirements of steel are getting higher and higher. Because the titanium in the traditional titanium-based conductive slag has a certain influence on the Ti content...

Examples

Embodiment 1

[0013] Embodiment 1: according to the ratio in parts by weight: carbon powder: fluorite powder: Na 2 SiO 3 Aqueous solution = 72:24:4 ratio Weigh raw materials, first mix carbon powder, fluorite powder, and then Na 2 SiO 3 The aqueous solution is added to the mixture of carbon powder and fluorite powder, stirred, mixed evenly, made into small pieces using a molding die, and dried for later use; wherein Na 2 SiO 3 The concentration of the aqueous solution is 20%.

Embodiment 2

[0014] Embodiment 2: according to the ratio of parts by weight: carbon powder: fluorite powder: Na 2 SiO 3 Aqueous solution = 75:21:4 ratio to weigh raw materials, first mix carbon powder and fluorite powder evenly, and then Na 2 SiO 3 The aqueous solution is added to the mixture of carbon powder and fluorite powder, stirred, mixed evenly, made into small pieces using a molding die, and dried for later use; wherein Na 2 SiO 3 The concentration of the aqueous solution is 24%.

Embodiment 3

[0015] Embodiment 3: according to the ratio in parts by weight: carbon powder: fluorite powder: Na 2 SiO 3 Aqueous solution = 73:22:5 ratio to weigh raw materials, first mix carbon powder and fluorite powder evenly, and then Na 2 SiO 3 The aqueous solution is added to the mixture of carbon powder and fluorite powder, stirred, mixed evenly, made into small pieces using a molding die, and dried for later use; wherein Na 2 SiO 3 The concentration of the aqueous solution is 26%.

[0016] The carbonaceous conductive slag prepared according to the above examples 1-3 is respectively called carbonaceous conductive slag 1, carbonaceous conductive slag 2, and carbonaceous conductive slag 3. Use electric welding machine welding clips to test its conductivity and arcing stability, and the results As shown in Table 1.

[0017] Table 1 uses Na 2 SiO 3 Carbonaceous conductive slag in aqueous solution and Na-free 2 SiO 3 Performance comparison of carbonaceous conductive slag in aqueo...

technical field

[0001] The invention relates to a carbonaceous conductive slag suitable for electroslag steel smelting and a preparation method thereof, belonging to the field of electroslag steel smelting. Background technique

[0002] In the current electroslag steel smelting, the method of remelting smelting after arcing slag is widely used. The traditional conductive slag is usually titanium conductive slag. The raw materials of titanium conductive slag are titanium dioxide and fluorite (each accounting for 50%). They are placed in the crystallizer and smelted at high temperature using graphite electrodes, and then cooled and crushed for later use. Titanium conductive slag is widely used because of its stable arc starting and convenient operation. With the advancement of science and technology, the quality requirements of steel are getting higher and higher. Because the titanium in the traditional titanium-based conductive slag has a certain influence on the Ti content...

Examples

Embodiment 1

[0013] Embodiment 1: according to the ratio in parts by weight: carbon powder: fluorite powder: Na 2 SiO 3 Aqueous solution = 72:24:4 ratio Weigh raw materials, first mix carbon powder, fluorite powder, and then Na 2 SiO 3 The aqueous solution is added to the mixture of carbon powder and fluorite powder, stirred, mixed evenly, made into small pieces using a molding die, and dried for later use; wherein Na 2 SiO 3 The concentration of the aqueous solution is 20%.

Embodiment 2

[0014] Embodiment 2: according to the ratio of parts by weight: carbon powder: fluorite powder: Na 2 SiO 3 Aqueous solution = 75:21:4 ratio to weigh raw materials, first mix carbon powder and fluorite powder evenly, and then Na 2 SiO 3 The aqueous solution is added to the mixture of carbon powder and fluorite powder, stirred, mixed evenly, made into small pieces using a molding die, and dried for later use; wherein Na 2 SiO 3 The concentration of the aqueous solution is 24%.

Embodiment 3

[0015] Embodiment 3: according to the ratio in parts by weight: carbon powder: fluorite powder: Na 2 SiO 3 Aqueous solution = 73:22:5 ratio to weigh raw materials, first mix carbon powder and fluorite powder evenly, and then Na 2 SiO 3 The aqueous solution is added to the mixture of carbon powder and fluorite powder, stirred, mixed evenly, made into small pieces using a molding die, and dried for later use; wherein Na 2 SiO 3 The concentration of the aqueous solution is 26%.

[0016] The carbonaceous conductive slag prepared according to the above examples 1-3 is respectively called carbonaceous conductive slag 1, carbonaceous conductive slag 2, and carbonaceous conductive slag 3. Use electric welding machine welding clips to test its conductivity and arcing stability, and the results As shown in Table 1.

[0017] Table 1 uses Na 2 SiO 3 Carbonaceous conductive slag in aqueous solution and Na-free 2 SiO 3 Performance comparison of carbonaceous conductive slag in aqueo...

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