Method for recovery of stainless steel tailings and coal ash

A technology of stainless steel and fly ash, applied in glass furnace equipment, glass manufacturing equipment, manufacturing tools, etc., can solve problems such as waste of resources and environmental pollution, and achieve the effects of saving production costs and preventing environmental pollution

Active Publication Date: 2010-09-22
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the increase of stainless steel production in my country, there are more and more stainless steel slags. The stainless steel slags are separated by crushing magnetic separation and metal induction to select valuable metal iron, chromium and nickel, and the remaining large amount of stainless steel tailings are dumped. Not only will a lot of resources be wasted, but the chromium ions in the stainless steel tailings will also cause great pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This utilization method of stainless steel tailings and fly ash is the following steps in sequence:

[0028] (1) Preparation of basic glass samples

[0029] I mix

[0030] Mix the raw materials of the following mass parts proportioning evenly:

[0031] Stainless steel tailings 38 Fly ash 17 Quartz sand 30

[0032] Sodium Carbonate 4 Barium Oxide 4.

[0033] Each portion is 0.15kg, and the particle size of the above-mentioned raw materials is not greater than 0.15mm. The stainless steel tailings are the tailings of smelting 300 series and 400 series stainless steel, and the fly ash is the fly ash of steam coal.

[0034] II melting

[0035] Put the uniformly mixed raw materials into a corundum crucible with a capacity of 50ml, put them into a silicon-molybdenum rod electric furnace, raise the temperature of the furnace to 1450°C to melt the powdery raw materials into molten glass, and keep the temperature for 2 hours.

[0036] III Casting and annealing (monoblock pro...

Embodiment 2

[0055] This utilization method of stainless steel tailings and fly ash is the following steps in sequence:

[0056] (1) Preparation of basic glass samples

[0057] I mix

[0058] Mix the raw materials of the following mass parts proportioning evenly:

[0059] Stainless steel tailings 40 Fly ash 20 Quartz sand 32

[0060] Sodium Carbonate 6 Barium Oxide 6.

[0061] Each portion is 0.15kg, and the particle size of the above-mentioned raw materials is not greater than 0.15mm. The stainless steel tailings are the tailings of smelting 300 series and 400 series stainless steel, and the fly ash is the fly ash of steam coal.

[0062] II melting

[0063] Put the uniformly mixed raw materials into a corundum crucible with a capacity of 50ml, put them into a silicon-molybdenum rod electric furnace, raise the furnace temperature to 1500°C, melt the powdery raw materials into molten glass, and keep the temperature for 2 hours.

[0064] III Casting and annealing (monoblock processing) ...

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Abstract

The invention relates to a method for recovery of stainless steel tailings and coal ash, which comprises the following steps: first, the preparation of a base glass sample: I, mixing: mixing the following materials to be even; 33-42 stainless steel tailings, 10-23 coal ash, 25-35 quartz sand, 3-6 sodium carbonate and 3-5 barium oxide; II, melting: heating the mixture up to 1,400-1,500 DEG C until the mixture turns to glass metal, and preserving heat for 1.5-3h; III; pouring and annealing: pouring the glass metal into a stainless steel mould which is preheated to 600-700 DEG C, annealing for 1-2h under 650-700 DEG C; cooling along with the furnace, taking the mould out of the furnace and demolding the glass metal to the base glass sample; 2, nucleation and crystallization: heating the glass sample to 80-1030 DEG C for crystallization and then cooling the glass sample along with the furnace until the glass sample turns to a microcrystal glass sample; and 3, processing the microcrystal glass sample to be a finished product. The method makes use of the stainless steel tailings and the coal ash to produce microcrystal glass and thereby provides a novel approach for the recovery of stainless steel tailings.

Description

technical field [0001] The invention relates to a treatment method for stainless steel tailings and fly ash, in particular to a utilization method for stainless steel tailings and fly ash. Background technique [0002] In recent years, with the increase of stainless steel production in my country, there are more and more stainless steel slags. The stainless steel slags are separated by crushing magnetic separation and metal induction to select valuable metal iron, chromium and nickel, and the remaining large amount of stainless steel tailings are dumped. Not only will a lot of resources be wasted, but also the chromium ions in the stainless steel tailings will cause great pollution to the environment. Therefore, it is an imminent task to study how to utilize these stainless steel tailings. Contents of the invention [0003] In order to overcome the above-mentioned shortcomings of the existing stainless steel tailings and fly ash treatment methods, the present invention pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/14C03C6/10C03B5/16C03B25/00C03B32/02
Inventor 仪桂兰史永林邓友林李俊虎叶文成
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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