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

Process for recovering slag iron ball and slag iron powder from steel-iron slag

A technology of slag iron powder and iron slag, which is applied in the field of waste recycling technology, can solve the problems of large dust, low water content of steel-iron slag, etc., and achieve the effects of low investment, expanded utilization rate, and environmental protection

Active Publication Date: 2007-05-02
BAOSHAN IRON & STEEL CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The steel-iron slag processed by the granular iron recovery process has a low moisture content, so huge dust removal equipment must be installed, and the moisture content of the steel-iron slag must be strictly controlled during operation, otherwise a large amount of dust will be generated, which cannot pass the environmental protection requirements. abandoned

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
  • Process for recovering slag iron ball and slag iron powder from steel-iron slag
  • Process for recovering slag iron ball and slag iron powder from steel-iron slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Referring to Fig. 2, the slag-iron ball and slag-iron powder recovery process in the steel-iron slag of the present invention comprises the following steps:

[0017] First, sprinkle water on the slag steel to keep the steel-iron slag in a wet state, and use the free CaO in the steel-iron slag to react with water to generate Ca(OH) 2 , so that the steel-iron slag is expanded and loose (the time to keep wet should be determined according to whether the steel-iron slag is fully expanded and loose), and the steel-iron particles and powder are fully separated from the slag, step 100;

[0018] After the steel-iron particles and powder are fully separated from the slag, the steel-iron slag is screened (step 200), the sieve aperture is 50mm, 5mm, and the steel-iron slag with a particle size of more than 50mm, 5-50mm, and less than 5mm is screened out. Iron slag;

[0019] Carry out magnetic separation operation (step 300) on the steel-iron slag with particle size above 50mm, se...

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

This invention relates to a method for a recovery technology for slag iron balls and powder in iron and steel slag, which first of all sprays the slag, in which, the free CaO in the slag reacts with water to generate Ca(OH)2 to expand and relax the slag to fully separate the particles and powder with slag and then sieve them, after that, slag over 50mm particles are magnetically selected to separate slag products over 50mm to be used in electric oven, slag of 5-50mm slag iron balls for the oven and slag below 50mm are selected to separate semi-products of slag iron powder to be washed and magnetic-selected to separate slag iron powder for the matched material of sintering.

Description

technical field [0001] The invention relates to a waste recovery process, in particular to the recovery of slag iron balls and slag iron powder in steel-iron slag produced in the iron and steel industry. The method can fully recover slag-iron balls and slag-iron powder in the steel-iron slag, wherein the slag-iron balls are used for electric furnace batching, and slag-iron powder is used for sintering ore batching. Background technique [0002] Steelmaking is smelting slag. In the steelmaking process, the amount of steel slag produced accounts for about 5-10% of the steel output. This part of steel slag contains about 15-25% of steel particles and T.Fe in addition to a large amount of slag produced in the smelting process. With the continuous improvement of steel quality requirements, a large number of molten iron pretreatment processes, molten iron slag removal processes, slag dumping processes for mixed iron cars, and steel retention processes for ladles are widely used i...

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): C21B3/04C21B3/06
CPCY02W30/50
Inventor 陆连芳吴伟民赵家蒙金奕
Owner BAOSHAN IRON & STEEL CO LTD