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Blast furnace smelting fly ash treatment system and treatment method thereof

A processing system and blast furnace smelting technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of not being widely promoted and high operating costs

Pending Publication Date: 2020-10-20
SHENYANG DONGDASHANHUI ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are various solidification methods for the fly ash of waste incineration and then landfill. They can also be solidified by cement technology, and some are used to produce fillers. There are also foreign plasma melting methods, which are limited by various conditions, such as material properties, environment, and technology. And other environmental protection restrictions, the operating cost is too high, has not been widely promoted

Method used

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  • Blast furnace smelting fly ash treatment system and treatment method thereof

Examples

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Effect test

Embodiment 1

[0027] A steel company uses 230m 3 Blast furnace smelting is used for fly ash treatment, and about 60 tons of fly ash need to be processed every day. Build a 60m 3 fly ash storage tank, a 120m 3 The mixed material storage tank and a pre-mixing gyratory equipment, other equipment adopts the original equipment of the factory; the fly ash from the waste incineration power plant is transported to the treatment site by closed tank trucks, and the fly ash is transported to the fly ash storage tank through the airflow.

[0028] Such as figure 1 As shown, a blast furnace smelting fly ash treatment system includes a closed tank car 1, a fly ash storage tank 2, a coal grinding device 3, a pulverized coal storage tank 4, a pre-mixing rotary device 5, a mixture storage tank 6, and an injection tank 7 , distributor 8, spray gun 9 and blast furnace 10;

[0029] The top of the mixture storage tank 6 is provided with an explosion-proof hole 11; the furnace hearth of the blast furnace 10 i...

Embodiment 2

[0043] The blast furnace smelting fly ash processing system of Example 1 is used to process about 60 tons of fly ash per day.

[0044] A processing method for a blast furnace smelting fly ash processing system, comprising the following steps:

[0045] Step 1, mix:

[0046] The fly ash in the airtight tank car 1 is transported to the fly ash storage tank 2 by means of air flow transport, and the transport gas is dry air; the anthracite with a calorific value of 25000KJ is ground in the coal grinding device 3 into coal powder with a particle size of <2 mm, and transported to the pulverized coal storage tank 4 through the airflow; then the fly ash and pulverized coal are simultaneously transported to the pre-mixing cyclone device 5 through the pipeline for uniform mixing, and the mixing mass ratio of the fly ash and pulverized coal is 35:65. into mixed powder, and transported to the mixed material storage tank 6 by air flow for storage;

[0047] Step 2, injecting: use air flow ...

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Abstract

The invention discloses a blast furnace smelting fly ash treatment system and a treatment method thereof, and belong to the field of environmental protection. The system involves a closed tank car, afly ash storage tank, a coal grinding device, a pulverized coal storage tank, a premixing whirling device, a mixture storage tank, a blowing tank, a distributor, spray guns and a blast furnace. According to the system and the method, annular coal injection openings are formed in a hearth of the blast furnace, pulverized coal, fly ash and combustion-supporting gas are injected into the blast furnace together through the annular coal injection openings, and the harmless treatment and resource utilization are conducted on the fly ash by means of a high-temperature environment in the blast furnace; and through the treatment system, various metals in the fly ash are all recovered with high added value, the occupied area is small, the investment is small, the environmental pollution is avoided,and the realizability is good.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a blast furnace smelting fly ash processing system and a processing method thereof. Background technique [0002] At present, there are various solidification methods for the fly ash of waste incineration and then landfill. They can also be solidified by cement technology, and some are used to produce fillers. There are also foreign plasma melting methods, which are limited by various conditions, such as material properties, environment, and technology. And other environmental restrictions, the operating cost is too high, has not been widely promoted. [0003] Waste incineration fly ash contains a variety of multi-component eutectics of heavy metals, alkali metals, and light metals, as well as chlorine, fluorine, and dioxins. Contents of the invention [0004] In order to develop an economical, practical, environmentally friendly and harmless fly ash treatme...

Claims

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Application Information

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IPC IPC(8): C21B5/00C22B7/02C22B13/02C22B19/00C22B17/02C21B5/04
CPCC21B5/003C21B5/001C22B7/02C22B7/001C22B13/025C22B19/00C22B17/02C21B5/04Y02P10/20
Inventor 孙中强孙长照
Owner SHENYANG DONGDASHANHUI ENVIRONMENTAL TECH CO LTD
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