Unlock instant, AI-driven research and patent intelligence for your innovation.

A spray granulation covering agent for tundish and production method thereof

A spray granulation and covering agent technology, applied in the field of metallurgical auxiliary materials, can solve the problems of waste of resources, soil and groundwater pollution, etc., and achieve the effects of stable quality, significant economic benefits, and cost reduction

Active Publication Date: 2016-05-25
HENAN TONGYU METALLURGY MATERIALS GRP
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After investigation and research on the surrounding metallurgical equipment manufacturers who use flux, a machinery manufacturing company with an annual output of 1W sets of metallurgical equipment produces about 1,000 tons of flux waste slag a year. At present, the main methods for dealing with flux waste slag are: dumping, filling Buried, resulting in waste of resources, and the flux waste contains Na 2 After O and F are piled in the open air or landfilled, they will be washed by rainwater and seeped into the ground, which will cause soil and groundwater pollution.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A spray granulation covering agent for tundish and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A spray granulation covering agent for a tundish, comprising the following raw materials: wollastonite, flux waste residue, lightly burned dolomite, soda ash, fly ash, bentonite or / and cement clinker, binder, and its mass percentages are respectively 34%, 20%, 3%, 1%, 35%, 5%, 2%.

[0020] Its chemical composition is as follows:

[0021] project Alkalinity SiO 2 (%) MgO (%) CaO (%) Fe 2 o 3 (%) Al 2 o 3 (%) Na 2 O (%) F （%） C 固 （%） ingredients 0.83 31.6 5.6 26.3 1.98 10.3 0.97 1.51 15.3

[0022] A kind of production method of spray granulation covering agent for tundish, comprises the following steps:

[0023] 1. Raw material treatment: Stir and mix the flux waste slag in batches with a forklift, control its water content to be less than 1%, and process it into -150 mesh fine powder, and use magnetic separation to remove iron at the discharge port;

[0024] 2. Raw material testing: Sampling of flux waste slag to det...

Embodiment 2

[0035] A spray granulation covering agent for a tundish, comprising the following raw materials: wollastonite, flux waste residue, lightly burned dolomite, soda ash, fly ash, bentonite or / and cement clinker, binder, and its mass percentages are respectively 37%, 18%, 7%, 2%, 25%, 9%, 2%.

[0036] The physical and chemical results of this formula in the laboratory test are shown in Table 9:

[0037]

[0038] Embodiment two replaces 3% wollastonite, 3% lightly burned dolomite, 3% fluorite, 5% bauxite, 3% cement clinker, 1% White alkali, add 4.5% of quartz. The cost of raw materials was reduced by 139.8 yuan / ton. The results of laboratory testing are in line with the technical standards of the enterprise. The raw material cost of this formula is 471.4 yuan / ton.

[0039] After mass production, the product is used in the steelmaking and continuous casting site of a domestic iron and steel enterprise as follows:

[0040]Process parameters: 60 tons of steel ladle, 45-50 minut...

Embodiment 3

[0043] A spray granulation covering agent for tundish, comprising the following raw materials: wollastonite, flux waste residue, lightly burned dolomite, soda ash, fly ash, bentonite or / and cement clinker, binder, and its mass percentages are respectively 35%, 19%, 5%, 1.5%, 30%, 7.5%, 2%.

[0044] project Alkalinity SiO 2 (%) CaO (%) MgO (%) Fe 2 o 3 (%) Al 2 o 3 (%) Na 2 O (%) F （%） C 固 （%） ingredients 0.94 31.1 29.4 6.03 2.07 9.28 1.39 1.21 12.48

[0045] The result of the laboratory test of embodiment two meets the technical standard of the enterprise.

[0046] After mass production, the product is used in the steelmaking and continuous casting site of a domestic iron and steel enterprise as follows:

[0047] Process parameters: 60 tons of steel ladle, 45-50 minutes of continuous casting, and the temperature drop during each ladle is required to be less than 5°C. The tundish does not encrust, does not corrode the lining...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a spray granulation covering agent for a tundish and a production method thereof, comprising the following raw materials: wollastonite, flux waste residue, lightly burned dolomite, soda ash, fly ash, bentonite or / and cement clinker, combined Agent, its mass percentage content is respectively 35%, 19%, 5%, 1.5%, 30%, 7.5%, 2%. The present invention can replace or partly replace the raw materials containing such chemical elements used in the covering agent by adding Ca, Si, Mg, Al, Na, F elements contained in the flux waste in the covering agent formula, and the quality of the product Stable, able to meet enterprise standards and meet the needs of the market. In addition, the price of flux waste is low, and the use of it in the covering agent can greatly reduce the material cost of the spray granulation covering agent, and the economic benefit is remarkable.

Description

technical field [0001] The invention belongs to the technical field of metallurgical auxiliary materials, and relates to a spray granulation covering agent for tundishes and a production method thereof. Background technique [0002] After more than ten years of rapid development in my country's steel industry, the output of crude steel has increased from 130 million tons in 2000 to 716 million tons in 2012, and the quality of products has also achieved rapid development. However, today's steel industry is facing a bottleneck period of development. On the one hand, it is the disorderly expansion of production capacity, and on the other hand, it is the sharp decline in the industry's profit margin. With the obvious overcapacity of domestic iron and steel, the operation of iron and steel enterprises is in trouble, and the era of high profit growth in the iron and steel industry is difficult to reproduce, and it is entering a long period of adjustment. All iron and steel enterp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111
Inventor 张国令陈守杰
Owner HENAN TONGYU METALLURGY MATERIALS GRP