Method for testing zinc content of scrap steel in converter smelting mode
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A converter smelting and scrap zinc technology, applied in the field of iron and steel metallurgy, can solve the problems of inaccurate testing of scrap zinc content, and achieve the effects of being representative, increasing economic benefits, and reducing steelmaking costs
Inactive Publication Date: 2020-12-11
LIUZHOU IRON & STEEL
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[0004] The technical problem to be solved in the present invention is to overcome the problem of inaccurate testing of the zinc content of scrap steel in the prior art, and propose a method for testing the zinc content of scrap steel under the converter smelting mode
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Embodiment 1
[0074] Test scrap material type: cold-rolled automobile sheet punching and briquetting.
[0075] Smelting steel type: SPHC-1R.
[0076] The metal material structure of the furnace: 143 tons of molten iron + 32 tons of test scrap.
[0077] Hot metal weight: 143 tons ± 2 tons; scrap steel weight: 32 tons ± 1 ton.
[0078] The composition and temperature of molten iron are shown in Table 1:
[0079] Table 1 Embodiment 1 molten iron composition and temperature table
[0080]
[0081] Types of slagging agents and slagging system: slagging agents are metallurgical lime and raw dolomite, and the binary basicity of the final slag of the converter is 2.5 to 3.5. The amount of slagging agent added and the timing of adding it executes the SPHC-1R blowing model.
[0082] Top and bottom combined blowing process: SPHC-1R blowing model.
[0083] Type and amount of coolant: The coolant is sintered ore, and the amount of coolant added is carried out in the SPHC-1R blowing model.
[00...
Embodiment 2
[0097] Test scrap type: full galvanized scrap briquetting.
[0098] Smelting steel grade: SPHC-1R.
[0099] The metal material structure of the furnace: 143 tons of molten iron + 32 tons of test scrap.
[0100] Hot metal weight: 143 tons ± 2 tons; scrap steel weight: 32 tons ± 1 ton.
[0101] The composition and temperature of molten iron are shown in Table 3:
[0102] Table 3 Example 2 molten iron composition and temperature table
[0103]
[0104] Types of slagging agents and slagging system: slagging agents are metallurgical lime and raw dolomite, and the binary basicity of the final slag of the converter is 2.5 to 3.5. The amount of slagging agent added and the timing of adding it executes the SPHC-1R blowing model.
[0105] Top and bottom combined blowing process: SPHC-1R blowing model.
[0106] Type and amount of coolant: The coolant is sintered ore, and the amount of coolant added is carried out in the SPHC-1R blowing model.
[0107] End point control target: C: ...
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Abstract
The invention discloses a method for testing zinc content of scrap steel in a converter smelting mode, and the zinc content of the scrap steel is measured through converter material balance. The method for testing the zinc content of the scrap steel comprises the following steps: testing scrap steel hopper matching and performing feeding; adding molten iron into a converter; performing converter smelting; performing tapping; performing deslagging; respectively acquiring weight data of molten iron entering a furnace, molten iron slag entering the furnace, test scrap steel, a converter slag former, a converter coolant, a slag pressing agent, converter terminal molten steel, converter final slag, converter LT-method dedusting coarse ash, converter LT-method dedusting fine ash and converter secondary dedusting ash; respectively sampling molten iron entering the furnace, molten iron slag entering the furnace, the converter slag former, the converter coolant, the slag pressing agent, converter end point molten steel, converter end slag, converter LT method dedusting coarse ash, converter LT method dedusting fine ash and converter secondary dedusting ash, and detecting the zinc content; and solving the zinc content of the tested scrap steel by referring to a zinc content determination formula of the zinc-containing scrap steel.
Description
technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a method for testing the zinc content of scrap steel in a converter smelting mode. Background technique [0002] Zinc is a non-ferrous metal most closely related to the iron and steel industry. Galvanized iron and steel products consume nearly 50% of zinc production each year. These materials are scrapped after a life cycle and returned to converters or electric furnaces as zinc-containing scrap. Zinc-containing scrap steel will increase the zinc content of converter dust removal dust, and converter dust removal dust will be returned to sintering for use. Zinc will enter the blast furnace together with sintering raw materials to form a cycle and be continuously enriched, which will adversely affect the furnace condition and service life of the blast furnace. Zinc-containing scrap is mostly produced in industries such as automobiles, home appliances, hardware, construction...
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