Process for recovering iron and carbon elements from blast furnace gas ash

A technology for recovering blast furnace gas ash and iron, applied in recycling technology, improvement of process efficiency, chemical instruments and methods, etc., can solve the problems of high sorting cost and low process index, and achieve high product quality and technical index advantages , Purification and impurity removal effects are remarkable

Active Publication Date: 2013-01-16
ANSTEEL GRP MINING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These three process indicators are not high, and the selection cost is relatively high

Method used

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  • Process for recovering iron and carbon elements from blast furnace gas ash

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] 1) Flotate directly the gas ash with iron content of 31.46%, carbon content of 37.90%, and -0.071mm particle size of 43.6% by weight, and add water to the first stirring tank to adjust the gas ash to a weight concentration of 35%. The ore pulp is fed into the second stirring tank, and flotation reagents are sequentially added to the second stirring tank, diesel oil 1050 g / t, turpentine 215 g / t, after adding the drugs, it is fed into the rough flotation,

[0078] 2) The concentrate from the rough flotation is fed into the fine flotation, and the concentrate from the fine flotation is the final carbon concentrate with a carbon content of 85.26%, and the carbon recovery rate is 81.55%.

[0079] 3) The rough flotation tailings and fine flotation tailings are combined into flotation tailings, and the flotation tailings with an iron content of 44.27% and a weight concentration of 45% are fed into the rougher spiral launder for heavy selection ,

[0080] 4) The concentrate wi...

Embodiment 2

[0086] 1) Flotate the gas ash with iron content of 34.61%, carbon content of 36.84%, and -0.071mm content of 40.2% directly, and add water to the first mixing tank to adjust the gas ash to a slurry with a weight concentration of 35%, and feed it into the second Two stirring tanks, and sequentially add flotation reagents into the second stirring tank, diesel oil 985g / t, turpentine 205g / t, feed into rough flotation after dosing,

[0087] 2) The concentrate from the rough flotation is fed into the fine flotation. The concentrate from the fine flotation is the final carbon concentrate with a carbon content of 84.87%, and the carbon recovery rate is 81.18%.

[0088] 3) The rough flotation tailings and the fine flotation tailings are combined into flotation tailings, and the flotation tailings with an iron content of 48.19% and a weight concentration of 43% are fed into the rougher spiral launder for heavy selection ,

[0089] 4) The concentrate with an iron content of 60.32% in th...

Embodiment 3

[0095] 1) Flotate the gas ash with iron content of 38.23%, carbon content of 33.20%, and -0.071mm content of 46.5% directly, and add water to the first mixing tank to adjust the gas ash to a slurry with a weight concentration of 33%, and feed it into the second Two stirring tanks, and sequentially add flotation reagents to the second stirring tank, diesel oil 960g / t, turpentine 190g / t, feed into rough flotation after dosing,

[0096] 2) The concentrate from the rough flotation is fed into the fine flotation, and the concentrate from the fine flotation is the final carbon concentrate with a carbon content of 85.07%, and the carbon recovery rate is 81.74%.

[0097] 3) The rough flotation tailings and the fine flotation tailings are combined into flotation tailings, and the flotation tailings with an iron content of 49.93% and a weight concentration of 42% are fed into the rougher spiral launder for heavy selection ,

[0098] 4) The concentrate with an iron content of 60.6% in t...

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Abstract

The invention relates to the technical field of blast furnace ash resource reutilization, in particular to a process for recovering iron and carbon elements from blast furnace gas ash. A flotation method is adopted for recovering carbon, a re-separation and magnetic separation method is adopted for recovering iron, the total separation process is the combined technical process flow of flotation, re-separation and magnetic separation, the gas ash enters the coarse flotation after the slurry preparation and medicine adding, coarse flotation concentrates enter fine flotation, the fine flotation concentrates are final carbon concentrates, coarse flotation tailings and fine flotation tailings enter a re-separation coarse separation spiral chute to separate out re-separation tailings, the coarse spiral concentrates enter a fine separation spiral chute to obtain re-separation concentrates, ores in a fine separation spiral chute carries out self circulation, the tailings in the fine separation spiral chute enter a weak magnetic separation machine for carrying out magnetic separation, the weak magnetic concentrates and the re-separation concentrates are combined into final iron concentrates, and the weak magnetic tailings and the re-separation tailings are combined into final tailings. The process has the beneficial effects that the process is simple, the varieties of reagents are few,the process configuration is reasonable, the purification and impurity removal effects are obvious, the product quality is better, the recovery rate is high, and a new path is provided for the comprehensive utilization of the blast furnace gas ash.

Description

technical field [0001] The invention relates to the technical field of reutilization of blast furnace gas ash resources, in particular to a process for recovering iron and carbon elements from blast furnace gas ash. Background technique [0002] Blast furnace gas ash is the smoke and dust discharged together with the blast furnace gas during the blast furnace ironmaking process. The dust collected by the dry dust collector is in the form of gray powder, the particle size is coarser than that of the furnace gas mud, and the iron minerals are mainly FeO. Gas ash is dry and easy to flow, causing serious pollution when stacked and transported. Blast furnace gas ash is one of the main solid wastes of iron and steel enterprises. my country's steel production has leapt to the first place in the world in recent years. The total amount of blast furnace gas ash produced by ironmaking blast furnaces is quite large. Calculated as 1.7% of iron production, the annual output of gas ash...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03D1/00B03C1/00C21B3/04
CPCY02P10/20Y02W30/50
Inventor 王陆新周惠文宋均利刘双安
Owner ANSTEEL GRP MINING CO LTD
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