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Comprehensive utilization method of converter dust removal ash

A converter dust removal and converter technology, which is applied in the manufacture of converters and the improvement of process efficiency, can solve the problems of secondary pollution of the environment, heavy storage pressure of dust removal dust, and affect the smooth production of steelmaking, so as to improve the service life of the furnace , to achieve internal recycling, to improve the effect of dephosphorization

Inactive Publication Date: 2020-04-03
PANZHIHUA GANGCHENG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, steel mills have a lot of pressure on the storage of dust removal dust, and at the same time, it is easy to cause secondary pollution to the environment, affecting the smooth production of steelmaking

Method used

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  • Comprehensive utilization method of converter dust removal ash
  • Comprehensive utilization method of converter dust removal ash
  • Comprehensive utilization method of converter dust removal ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this example, 45 parts by mass of converter dust is digested, then mixed with 10 parts by mass of steelmaking converter sludge, 40 parts by mass of quartz sand, and 5 parts by mass of binder, and then pelletized, dried, and cooled to obtain an environmentally friendly Converter steelmaking slag agent, the components and their mass fractions are shown in Table 1.

[0029] Table 1

[0030] components TF SiO 2

[0031] The slagging agent provided by this embodiment has high initial slag formation speed and dephosphorization efficiency; the slag removing agent provided by the present invention can recycle iron and magnesium oxide in the sludge, so that the consumption of iron and steel materials is reduced, and the slagging agent provided by this embodiment is used The agent can save 1.52 kg / ton of steel raw materials.

Embodiment 2

[0033] In this example, 40 parts by mass of converter dedusting ash are digested, then mixed evenly with 5 parts by mass of steelmaking converter sludge, 45 parts by mass of quartz sand, and 10 parts by mass of binder, and then pelletized, dried, and cooled to obtain an environmentally friendly Converter steelmaking slag agent, the components and their mass fractions are shown in Table 2.

[0034] Table 2

[0035] components TF SiO 2

[0036] The slagging agent provided by this embodiment has high initial slag formation speed and dephosphorization efficiency; the slag removing agent provided by the present invention can recycle iron and magnesium oxide in the sludge, so that the consumption of iron and steel materials is reduced, and the slagging agent provided by this embodiment is used The agent can save 1.47 kg / ton of steel raw materials.

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Abstract

The invention discloses a comprehensive utilization method of converter dust removal ash, relates to the technical field of environmental protection, and provides the comprehensive utilization methodof the converter dust removal ash. The comprehensive utilization method of the converter dust removal ash comprises the following steps that A, digestion treatment is carried out on the converter dustremoval ash in a spray water mode; and B, the digested converter dust removal ash is uniformly mixed with other ingredients according to a formula, and a balling environment-friendly converter steelmaking slagging agent is prepared by using a compression ball granulation, drying and cooling process, wherein the converter steelmaking slagging agent raw material comprises the following components of, in part by mass, 40-50 parts of converter dust removal ash, 10-15 parts of furnace sludge, 40-50 parts of quartz sand, and 5-10 parts of binder. According to the comprehensive utilization method, waste which is difficult to comprehensively utilized in the converter dust removal ash, converter sludge and the like of an iron and steel plant is taken as an important components for preparing a slagremover, so that the waste can be recycled, the problem of environmental pollution caused by stacking or burying of the materials is solved, and internal recycling of the waste resources is realized.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for comprehensive utilization of dust from converter dust removal. Background technique [0002] A large amount of smoke and dust are produced in the converter steelmaking process of steelmaking plants, and a large amount of dust is produced after dry dust removal. Large steel mills usually produce tens of thousands of tons of dust every year. Dedusting ash has the characteristics of fine particle size, low TFe and high CaO. Part of the dedusting ash is recycled by the scrap steel plant and then returned to ironmaking to add sinter to the blast furnace for utilization. However, due to the low TFe and heavy water content of the dedusting ash, it has a great impact on the normal production of sintering and the quality of sintering ore, so the amount used is still small. Therefore, steel mills have great pressure on the storage of dust removal dust, and at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28C21C7/064C22B1/24
CPCC21C5/28C21C7/0645C22B1/2406Y02P10/20
Inventor 张昕严翀陈涛毛朋张远春
Owner PANZHIHUA GANGCHENG GROUP
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