Medium-alkali thick blanking layer sintering and producing method

A production method and technology of thick material layer, applied in the field of sintering production with medium alkalinity thick material layer, can solve the problems of not being able to meet the large-scale blast furnace, lack of creativity, and optimization of particle size, etc., to achieve automatic heat storage enhancement and improvement Quality and yield, effect of improving sintering air permeability

Active Publication Date: 2015-06-24
唐山瑞丰钢铁(集团)有限公司
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the 1980s, major domestic iron and steel enterprises increased the sintering production capacity by increasing the thickness of the sintering material layer, but the thickness of the sintering material layer in most enterprises was only 750-850 mm. Such thick material layer sintering production cannot meet the development situation of large-scale blast furnaces. Seriously restrict blast furnace production
[0006] 1. Consuming quicklime before adding is the technical means that all manufacturers are currently adopting, which is not creative;
[0007] 2. Add water to the mixer f

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
  • Medium-alkali thick blanking layer sintering and producing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weight percentage of sintering ingredients: limonite 52%, blast furnace return ore 14%, sinter machine return ore 14%, dedusting ash 1%, iron oxide scale 5%, dolomite powder 5%, lime 5%, coal powder 4%;

[0041] After the batching is completed, mix and granulate the raw materials. The mixing time is 2.5 minutes, and the granulation time is 2.5 minutes. Ensure that the raw material temperature is 60-70 °C and the water content is 7-8%;

[0042] When laying raw materials, the thickness of the bottom material is 100mm, and the thickness of the sintered raw material is 900mm, and the material is not pressed;

[0043] Ignition temperature 1050±20℃, ignition time 1.5min, sintering negative pressure 15KPa; sintering speed: 1.25m / min, vertical burning speed: 22.5mm / min;

[0044] Cool after sintering, the cooling negative pressure is 11-16Kpa, the air leakage rate is less than 40%, and the sinter temperature after cooling is below 250°C.

[0045] Finally, it is crushed and scre...

Embodiment 2

[0048] Weight percentage of sintering ingredients: limonite 53%, blast furnace return ore 12%, sinter machine return ore 12%, dedusting ash 6%, iron oxide scale 5%, dolomite powder 4%, lime 4.5%, coal powder 3.5%;

[0049] After the batching is completed, the raw materials are mixed and granulated. The mixing time is 3 minutes, and the granulation time is 3 minutes. The raw material temperature is 60-70 °C and the water content is 7-8%.

[0050] When laying raw materials, the thickness of the bottom material is 100mm, and the thickness of the sintered raw material is 980mm, and the material is not pressed;

[0051] Ignition temperature 105±20°C, ignition time 1.7min, sintering negative pressure 15KPa; sintering speed: 1.36m / min, vertical burning speed: 26.66mm / min;

[0052] Cooling after sintering, cooling negative pressure 11 ~ 16Kpa, air leakage rate < 40%, sinter temperature after cooling below 250°C;

[0053] Finally, it is crushed and screened. If the particle size is less...

Embodiment 3

[0056] Weight percentage of sintering ingredients: limonite 54.5%, blast furnace return ore 11%, sinter return ore return 13%, dedusting ash 3%, iron oxide scale 5%, dolomite powder 4%, lime 5.5%, coal powder 4%;

[0057] After the batching is completed, the raw materials are mixed and granulated. The mixing time is 3 minutes, and the granulation time is 3.5 minutes. The raw material temperature is 60-70 °C and the water content is 7-8%.

[0058] When laying raw materials, the thickness of the bottom material is 100mm, and the thickness of the sintered raw material is 1000mm, and the material is not pressed;

[0059] Ignition temperature 105±20°C, ignition time 1.5min, sintering negative pressure 15KPa; sintering speed: 1.38m / min, vertical burning speed: 27.6mm / min;

[0060] Cooling after sintering, cooling negative pressure 11 ~ 16Kpa, air leakage rate < 40%, sinter temperature after cooling below 250°C;

[0061] Finally, it is crushed and screened. If the particle size is l...

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 relates to a medium-alkali thick blanking layer sintering and producing method. The sintering materials comprise, by weight, 50-56% of brown iron ore, 5% of oxidized iron sheet, 2-6% of fly ash, 12-14% of return ore of a sintering machine, 11-15% of return ore of a blast furnace, 4-5% of dolomite powder, 4-5% of white ash and 3-5% of coal powder; mixing and pelleting time is 2.5-3.5 min, bedding layer is 100 mm thick, the sintering materials are 900-1000 mm thick, annealing temperature is 1050+/-20 degrees Centigrade, sintering time is 1.5-1.8 min, and sintering negative pressure is 13-15 Kpa; cooling negative pressure is 11-16 Kpa, cold air rate is smaller than or equal to 40%, and temperature of sintered ore after cooling is below 250 degrees Centigrade. By the medium-alkali thick blanking layer sintering and producing method, cost of the sintering materials can be reduced, blanking thickness is increased, permeability of the blanking layer is improved, yield and production of the sintered ore are increased and energy consumption is reduced in sintering.

Description

technical field [0001] The invention relates to the field of sintered ore production, in particular to a production method for sintering a medium-alkalinity thick material layer. Background technique [0002] In the 1980s, major domestic iron and steel enterprises increased the sintering production capacity by increasing the thickness of the sintering material layer, but the thickness of the sintering material layer in most enterprises was only 750-850 mm. Such thick material layer sintering production cannot meet the development situation of large-scale blast furnaces. Seriously restrict blast furnace production. For example, a company has a 160m 2 Walking sintering machine and 2 sets of 120m 2 For the step-by-step sintering machine, the thickness of the sintering material layer is always controlled at 600-800mm, the thickness of the sintering material layer is relatively thin, and the sintering yield is low, only about 70%. [0003] In recent years, individual large iro...

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
IPC IPC(8): C22B1/16
Inventor 齐超群李雪松侯朝君孙荣志周涛吴鹏崔志永孙仕良刘松黄昆奕房欣张超
Owner 唐山瑞丰钢铁(集团)有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap