Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for improving quality stability of mixed iron material for sintering

A technology for quality stability and mixed iron, which is applied in the field of improving the quality stability of mixed iron materials for sintering, can solve the problems of increased fluctuation in the sintering process, deterioration of the sintering performance of iron ore powder, and poor sintering air permeability, etc., so as to improve the sintering process. quality, improve the effect of mixed use, improve the effect of stability

Pending Publication Date: 2021-06-11
SHANXI TAIGANG STAINLESS STEEL CO LTD
View PDF12 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the production process of sintering ore, due to the improvement of steel production capacity, the demand for ore powder has increased greatly, resulting in the decrease of high-quality iron ore powder resources year by year, and the overall sintering performance of iron ore powder is showing a trend of deterioration; at the same time, with the environmental protection requirements A large amount of iron-containing dust generated by iron and steel enterprises is returned to sintering for utilization. These metallurgical by-products have great differences in chemical composition, particle size composition, angle of repose, bulk density, hydrophilicity, etc., and are returned to sintering for utilization. After that, the comprehensive quality of ore powder for sintering will be stable and deteriorated, the mixed granulation effect will be poor, the air permeability of sintering will be deteriorated, and the fluctuation of sintering process will increase, which will affect the quality of sintered ore.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1 (comparative example)

[0047] Cylinder mixing method is adopted when processing iron-containing dust removal ash. When it is piled with other ore powders for the second time, the iron-containing dust removal ash mixture bin is located at the end of the batching bin, and the pile-making operation is carried out. The main steps are as follows:

[0048] (1) Store all kinds of iron-containing dedusting dust collected separately

[0049] (2) Carry out the calculation of the quantity of incoming materials, set the blanking ratio according to the ratio: 29 kilograms of blast furnace gas ash, 22 kilograms of blast furnace dust removal dust, 23 kilograms of steelmaking dust removal dust and 26 kilograms of iron oxide scale, to obtain the dust removal ash mix Homogenize.

[0050] (3) Use the cylinder to mix various materials, in order to reduce dust, add 3-5% water

[0051] (4) Bring the mixed iron-containing dedusting ash into the homogenizing ore making stacking...

Embodiment 2

[0055] (1) Batching is carried out through the batching disc: 29 kg of blast furnace gas ash, 22 kg of blast furnace dust removal dust, 23 kg of steelmaking dust removal dust and 26 kg of iron oxide scale. The batched blast furnace gas ash, blast furnace casthouse dust, steelmaking dust and iron oxide scale are transported to the strong mixing granulator for pre-mixing and pre-granulating. The whole process does not need to add water to obtain a mixed material.

[0056] (2) Use the bucket reclaimer to place the mixed material in the middle position of the batching bin for homogenizing ore making.

[0057] (3) Batching is carried out through the batching disc: 10 kg of dust-removing ash mixing material, 42 kg of Jianshan mineral powder, 35 kg of Yuanjiacun powder, and 13 kg of Yangdi powder.

[0058] In the present embodiment, the standard deviation of the homogenate Tfe is 0.31%, SiO 2 The standard deviation is 0.08%, and the drum strength is increased by 0.36%.

[0059] Acc...

Embodiment 3

[0063] (1) Batching is carried out through the batching disc: 25 kg of blast furnace gas ash, 20 kg of blast furnace dust removal dust, 22 kg of steelmaking dust removal dust and 33 kg of iron oxide scale. The batched blast furnace gas ash, blast furnace casthouse dust, steelmaking dust and iron oxide scale are transported to the strong mixing granulator for pre-mixing and pre-granulating. The whole process does not need to add water to obtain a mixed material.

[0064] (2) Use the bucket reclaimer to place the mixed material in the middle position of the batching bin for homogenizing ore making.

[0065] (3) Batching is carried out through the batching disc: 5 kg of dust removal ash mixing material, 40 kg of Jianshan mineral powder, 45 kg of Yuanjiacun powder, and 10 kg of Yang Di powder.

[0066] In the present embodiment, the standard deviation of the mixing material Tfe is 0.38%, SiO 2 The standard deviation is 0.10%, and the drum strength is increased by 0.38%.

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 provides a method for improving the quality stability of a mixed iron material for sintering. The method comprises the following steps: (1) conveying blast furnace gas ash, blast furnace casting house fly ash, steel-making fly ash and oxide scale which are subjected to batching to a powerful mixing granulator for premixing and pre-granulating to obtain a uniformly mixed material; (2) placing the uniformly mixed material in a middle bin position of an ore blending and stacking stock bin by using a bucket type material taking machine; and (3) carrying out secondary stacking on the uniformly mixed material and the mineral powder which are subjected to batching. According to the method, the mixed use effect of the iron-containing fly ash and the mineral powder can be improved, the comprehensive quality stability of the mineral powder for sintering is improved, the sintering mineralization atmosphere is stabilized, and the quality of sintered ore is improved.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgical production technology management, in particular to a method for improving the quality stability of mixed iron materials for sintering. Background technique [0002] With the rapid development of my country's steel industry technology, most steel plants are equipped with raw material storage yards for storage and mixing, which provides a basis for stabilizing the quality of iron ore powder. However, in the production process of sintering ore, due to the improvement of steel production capacity, the demand for ore powder has increased greatly, resulting in the decrease of high-quality iron ore powder resources year by year, and the overall sintering performance of iron ore powder is showing a trend of deterioration; at the same time, with the environmental protection requirements A large amount of iron-containing dust generated by iron and steel enterprises is returned to sinter...

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 Applications(China)
IPC IPC(8): C22B1/248C22B1/16
CPCC22B1/248C22B1/2406C22B1/16
Inventor 樊猛辉李强吴明
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com