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Application of thiourea-formaldehyde macromolecules to iron ore sintering fly ash

A technology of thiourea formaldehyde and iron ore, which is applied in the field of environment and polymer chemistry, can solve the problems of general inhibition effect, secondary pollution, instability, etc., and achieve the effects of high inhibition efficiency, easy storage and transportation, and low cost

Active Publication Date: 2017-10-20
BEIHANG UNIV
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Problems solved by technology

However, the reported inhibitory effects of these additives are average and most of them are unstable and toxic. After pyrolysis, toxic substances will be produced, causing secondary pollution

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  • Application of thiourea-formaldehyde macromolecules to iron ore sintering fly ash
  • Application of thiourea-formaldehyde macromolecules to iron ore sintering fly ash
  • Application of thiourea-formaldehyde macromolecules to iron ore sintering fly ash

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Embodiment Construction

[0016] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0017] The invention provides an application of thiourea-formaldehyde macromolecule in iron ore sintered fly ash, adding thiourea-formaldehyde macromolecule to iron ore sintered fly ash, and the added amount is 0.5% to 0.5% of the mass of iron ore sintered fly ash 2%. The infrared spectrogram of described thiourea formaldehyde polymer is as figure 1 shown.

[0018] Based on the application, the present invention also provides a test device for iron ore sintering fly ash heating, the test device is as figure 2 As shown, it includes nitrogen cylinder 1, oxygen cylinder 2, flow meter 3, tube furnace 4, ice-water bath 5, absorption bottle A6, absorption bottle B7 and activated carbon 8, and the gas outlets of nitrogen cylinder 1 and oxygen cylinder 2 pass through The gas pipeline A9 is connected to the inlet of the tube furnace 4, and the outlet of th...

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Abstract

The invention discloses application of thiourea-formaldehyde macromolecules in iron ore sintering fly ash and belongs to the field of environment and macromolecule chemical technologies. According to the application, the thiourea-formaldehyde macromolecules are added into the iron ore sintering fly ash to serve as an inhibitor to inhibit the toxicity equivalent weight of dioxin in the iron ore sintering fly ash sintering product, and an obvious inhibiting effect is achieved on generation of dioxin in the iron ore sintering fly ash and a precursor of the dioxin. The adding amount of the thiourea-formaldehyde macromolecules is 0.5%-2% of the mass of the iron ore sintering fly ash. Compared with a previous common sulfur-based and nitrogen-based inhibitor, the inhibitor for application is non-toxic, good in stability, high in decomposing temperature and easy to store and transport; and the obvious inhibiting effect is achieved on the generation of the dioxin in the iron ore sintering fly ash and the precursor of the dioxin, and the inhibiting efficiency of the inhibitor is higher than that of reported substances such as urea.

Description

technical field [0001] The invention belongs to the technical field of environment and polymer chemistry, and in particular relates to the application of thiourea-formaldehyde polymer in iron ore sintering fly ash. Background technique [0002] Chlorinated organic compounds such as chlorobenzenes (CBzs) and polychlorinated biphenyls (PCBs), as precursors of dioxins, are extremely harmful to human health and the ecological environment, and dioxins are unintentionally produced persistent organic pollutants , mainly from iron and steel smelting, solid waste incineration and cement production. With the improvement of dioxin control technology, dioxins produced by waste incineration are decreasing year by year, and the proportion of dioxins produced in metal smelting industry, especially steel production process, is increasing. Governance of its precursors has come into focus. The formation of dioxins in the sintering process has typical de novo synthesis characteristics, and t...

Claims

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Application Information

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IPC IPC(8): A62D3/33A62D101/08
CPCA62D3/33A62D2101/08
Inventor 孙轶斐徐佳妮刘丽娜张亚迪李文沛
Owner BEIHANG UNIV
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