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Resource utilization method of blast furnace dust and coke furnace dust

A technology for blast furnace dust removal and coke oven dust removal, which is applied in the field of solid waste recycling, can solve the problems of land occupation, environmental pollution of blast furnace dust removal and coke oven dust removal, and reduce the cost of coking wastewater treatment, and achieves high adsorption capacity. Effect

Active Publication Date: 2015-01-28
武汉武钢绿色城市技术发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a resource utilization method of blast furnace dust and coke oven dust. The advanced treatment of wastewater greatly reduces the cost of coking wastewater treatment

Method used

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  • Resource utilization method of blast furnace dust and coke furnace dust
  • Resource utilization method of blast furnace dust and coke furnace dust

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Take blast furnace dust and coke oven dust, and screen them separately, and screen out blast furnace dust and coke oven dust with a particle size of 150 mesh as raw materials; wherein, blast furnace dust contains 41.8% C, 33.4% TFe, 6.51% SiO 2 , 2.83% Al 2 o 3 , 2.38% CaO, 1.58% Na 2 O, 3.60% K 2 O, 2.12% Zn, and the rest are unavoidable impurities; coke oven dust contains 81.3% fixed C, 15.8% ash, 1.49% volatile matter and 1.41% sulfur;

[0029] 2) get above-mentioned blast furnace dedusting ash 200g after sieving and coke oven dedusting ash after 100g sieving mix, then add 30g bentonite as binding agent, then add mass percentage concentration again and be 5% (NH 4 )HCO 3 Solution, after stirring and mixing, press it into balls under 30MPa pressure, the particle diameter of the spherical particles is 1.5-5mm, preferably 2.0mm; wherein, (NH 4 )HCO 3 The solution is added in a volume ratio of 0.3:1 to the total volume ratio of blast furnace dust and coke oven ...

Embodiment 2

[0035] 1) get blast furnace dust removal and coke oven dust removal, screen respectively, and screen out blast furnace dust removal and coke oven dust removal particle diameter as raw material;

[0036] 2) Mix 500 g of blast furnace dust removal dust after the above-mentioned screening and 100 g of screening coke oven dust removal dust, then add 180 g of bentonite as a binding agent, and then add mass percent concentration of 2% (NH 4 )HCO 3 Solution, (NH 4 )HCO 3 The solution is added in a volume ratio of 0.6:1 to the total volume ratio of blast furnace dedusting ash and coke oven dedusting ash. After stirring and mixing, it is pressed into balls under a pressure of 20 MPa. The particle size of the spherical particles is about 3.5 mm;

[0037] 3) Dry the spherical particles obtained in step 2) in an oven at 100° C. for 30 minutes and then transfer them to a muffle furnace. 2 In the atmosphere, the temperature was raised to 500°C at a heating rate of 15°C / min, and then roas...

Embodiment 3

[0042] 1) get blast furnace dust removal and coke oven dust removal, screen respectively, and screen out blast furnace dust removal and coke oven dust removal particle diameter as raw material;

[0043] 2) Get the blast furnace dust removal dust 300g after above-mentioned sieving and the coke oven dust removal dust removal dust after 100g screening and mix, then add 80g bentonite as binding agent, then add mass percentage concentration again and be 10% (NH 4 )HCO 3 Solution, (NH 4 )HCO 3 The solution is added in a volume ratio of 0.5:1 to the total volume ratio of blast furnace dust and coke oven dust. After mixing, press it into balls under a pressure of 25MPa. The particle size of the spherical particles is about 2.0mm;

[0044] 3) Dry the spherical particles obtained in step 2) in an oven at 100° C. for 30 minutes and then transfer them to a muffle furnace. 2 In the atmosphere, the temperature was raised to 650°C at a heating rate of 15°C / min, and then roasted for 1.5h, ...

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Abstract

The invention discloses a resource utilization method of blast furnace dust and coke furnace dust. The resource utilization method comprises the following steps: 1) sieving out the blast furnace dust and the coke furnace dust with the grain sizes of 150-400 meshes; 2) mixing the sieved blast furnace dust and the sieved coke furnace dust according to a mass ratio of (2-5): 1, adding bentonite and an ammonium salt solution, stirring uniformly, granulating to obtain granules with the grain sizes of 1.5- 5.0mm; 3) drying the granules, adding the granules into a muffle furnace, rising the temperature to be 400- 650 DEG C at a heating speed of 12-18 DEG C / min in an inert gas atmosphere, roasting for 1-2h, sintering to obtain mixed dust granules; 4) adding the mixed dust granules into coking biochemical effluent, adjusting the PH value to 3-5, uniformly stirring and mixing, sufficiently degrading organic substances in the coking biochemical effluent for deep treatment. By the resource utilization method, the problems of environment pollution and large floor area of the blast furnace dust and the coke furnace dust are solved, the deep treatment of the coking biochemical effluent is implemented and the treatment cost of the coking wastewater is reduced.

Description

technical field [0001] The invention relates to solid waste recycling technology, in particular to a resource utilization method of blast furnace dust removal ash and coke oven dust removal dust. Background technique [0002] In recent years, with the rapid development of my country's iron and steel industry, the emission of dedusting ash has shown a rapid growth trend, among which, blast furnace dedusting ash and coke oven dedusting ash account for a large proportion of dedusting ash. Blast furnace dust refers to the dust discharged together with blast furnace gas during the ironmaking process. Generally, 20-60kg of blast furnace dust will be produced for each ton of iron produced. Blast furnace dust generally contains 25% to 45% of carbon and 15% of iron. % to 30%, because the amount of blast furnace dust removal is large, and it contains a lot of environmental pollutants, which will cause large area and environmental pollution problems. Therefore, it is necessary to make ...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/28C02F1/463C02F1/467B01J20/20B01J20/30B09B3/00B09B5/00
CPCB01J20/20C02F1/281C02F1/283C02F1/461C02F1/46176C02F1/463C02F1/4672C02F1/4676B01J20/3028B09B3/00B09B5/00B09B3/40
Inventor 张垒王凯军刘璞王丽娜付本全薛改凤刘尚超刘霞余刚强
Owner 武汉武钢绿色城市技术发展有限公司
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