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

Method for lowering contents of alkali metals and chloride ions in iron concentrates

A technology of chloride ion content and alkali metal, which is applied in the field of blast furnace smelting, can solve the problems of high content of alkali metal and chloride ion, achieve the effect of reducing the content of alkali metal and chloride ion, saving investment and achieving great benefits

Inactive Publication Date: 2015-04-29
SHOUGANG CORPORATION
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for reducing the content of alkali metals and chloride ions in iron ore concentrates to solve the technical problem of high content of alkali metals and chloride ions in some iron ore concentrates in the prior art

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
  • Method for lowering contents of alkali metals and chloride ions in iron concentrates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The method for reducing the content of alkali metals and chloride ions in iron concentrates is applied to a certain iron concentrate powder in Peru, and the alkali metals (Na 2 O+K 2 O) content is 0.296%, the content of chloride ion is 0.281%, and the requirement of blast furnace smelting to ore alkali metal content is: K 2 O+Na 2 O≤0.25%. Utilizing the iron concentrate powder to produce pellets for blast furnaces will increase the alkali load of the blast furnace and cause adverse effects; at the same time, chloride ions have a greater corrosive effect on blast furnaces and other equipment, so the following steps are used to reduce the concentration of iron concentrates content of alkali metals and chloride ions.

[0040] (1) Use fresh water for slurry preparation

[0041] Use fresh water at room temperature to prepare slurry for a certain iron concentrate powder in Peru, so that the concentration of the slurry is 60%. If the moisture content of the iron concentrat...

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 the field of blast-furnace smelting, and discloses a method for lowering contents of alkali metals and chloride ions in iron concentrates, which aims to solve the technical problem of higher contents of alkali metals and chloride ions in some iron concentrates. The method comprises the following steps: putting iron concentrate powder in fresh water to prepare ore slurry; stirring the ore slurry in a stirring barrel; and carrying out filtration treatment on the stirred ore slurry. The method achieves the technical effect of lowering the contents of alkali metals and chloride ions in the iron concentrates before furnace charging.

Description

technical field [0001] The invention relates to the field of blast furnace smelting, in particular to a method for reducing the contents of alkali metals and chloride ions in iron concentrate. Background technique [0002] Blast furnace smelting has certain requirements for the content of impurities in the furnace iron ore. For alkali metals, the blast furnace itself has a certain ability to discharge alkali, but if the content of alkali metal in the iron ore entering the furnace is too much, exceeding the alkali discharge capacity of the blast furnace, alkali metal enrichment will be formed, causing hearth accumulation and furnace material gas permeability Deterioration, increased coke ratio, nodules, and damage to the furnace wall; and if there are chloride ions, they will corrode the metal and cause greater damage to the production equipment. [0003] However, blast furnace ironmaking uses some iron ore concentrates (for example: a certain iron ore concentrate in Peru) w...

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): C22B1/00C21B5/00
Inventor 陈汉宇杨涛宋复梅任昳泊成
Owner SHOUGANG CORPORATION