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

A process and system for removing alkali metals from iron and steel smelting dust

A technology for iron and steel smelting and alkali metals, applied in the system for removing alkali metals in iron and steel smelting dust removal ash, and in the field of technology for removing alkali metals in iron and steel smelting dust removal dust, can solve the problems of large investment and few industrial implementations, and achieve Small investment, quick effect

Active Publication Date: 2017-02-15
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkali metals in iron and steel smelting dust removal can be removed by water washing, but generally require special mixing and washing equipment. In the field of iron and steel smelting, the investment is too large, and it is rarely implemented by industry.

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 process and system for removing alkali metals from iron and steel smelting dust

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. A system for removing alkali metals from iron and steel smelting dust.

[0022] Such as figure 1 As shown, a system for removing alkali metals from iron and steel smelting dedusting ash includes a conveying system, a slurry mixing system, a thickening and filtering system, the conveying system and a mixing and mixing system need to be newly built, and the thickening and filtering system adopts the original equipment of the concentrator.

[0023] The conveyor system includes a conveyor 1 and a conveyor belt 2. The conveyor 1 is a car, and the conveyor 1 can also be a belt conveyor, which is determined according to actual needs; the main body of the slurry mixing system is a high-efficiency mixing tank 4, which is installed with Inlet pipe 3, a flow meter is installed in the pipeline of water inlet pipe 3, and a delivery pump 5 and a first slurry concentration meter 6 are installed at the discharge port of the high-efficiency mixing tank 4; Dust removal, the other end...

Embodiment 2

[0032] 1. The system is the same as in Example 1.

[0033] 2. A process for removing alkali metals in iron and steel smelting dust by using the above system.

[0034] In step (2), immerse in water for 2 hours, and the concentration of water immersion is 30%, and the rest of the steps are the same as in Example 1.

[0035] Results: The potassium removal rate reached 94.7%, and the sodium removal rate reached 92.5%.

Embodiment 3

[0037] 1. The system is the same as in Example 1.

[0038] 2. A process for removing alkali metals in iron and steel smelting dust by using the above system.

[0039] In step (2), immerse in water for 5 hours, and the concentration of water immersion is 20%, and the rest of the steps are the same as in Example 1.

[0040] Results: The potassium removal rate reached 97.3%, and the sodium removal rate reached 93.0%.

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 process for removing alkali metals out of iron and steel making fly ash. The process comprises the following steps: (1) pulp mixing: adding the iron and steel making fly ash into an efficient stirring barrel, adding water and finishing the pulp mixing to obtain iron and steel making fly ash pulp; (2) water leaching concentration: adding the iron and steel making fly ash pulp into a concentrate concentrator of a dressing plant, and concentrating together with powdered iron pulp and finishing water leaching; and (3) filtration: enabling the underflow of the concentrator to enter a filter, and filtering to obtain a sintering raw material with water content of 12-15%. The invention also provides a system for removing alkali metals out of iron and steel making fly ash. The system is characterized by comprising a conveying system, a pulp mixing system and a concentration and filtering system, wherein the conveying system is arranged at the upstream part of the pulp mixing system; and the concentration and filtering system is arranged at the downstream part of the pulp mixing system and comprises a concentrator and a filter. According to the process and system for removing alkali metals out of iron and steel making fly ash provided by the invention, the alkali metals in the iron and steel making fly ash are removed by use of the existing concentration and filtering equipment and process of the dressing plant, the equipment cost is low, and the process has high efficiency and is practical.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a process for removing alkali metals in iron and steel smelting dust removal ash, and the invention also relates to a system for removing alkali metals in iron and steel smelting dust removal dust. Background technique [0002] With the continuous improvement of blast furnace smelting technology, the harm of alkali metals to blast furnace smelting has been paid more and more attention. It is mainly manifested in two aspects. One is to reduce the particle size and strength of coke and reduce the strength of sinter and pellets, which affects the blast furnace material column. Gas permeability; the second is to erode the furnace wall and reduce the life of the blast furnace lining. The research data shows that the harm of alkali metals to the blast furnace is especially serious with potassium, when the K in the raw material of the blast furnace 2 When the O content is greater th...

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): C22B1/00
Inventor 阮强王彩虹杨云虎
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD