Preparation method of modified biomass iron ore sintering additive

A technology for sintering additives and biomass, which is applied to the preparation of modified biomass iron ore sintering additives and the preparation of biomass additives, can solve the problems of complex process flow, small applicable fields, and improvement, and achieve high temperature retention time. , the effect of reducing SOx emissions and optimizing mass transfer conditions

Inactive Publication Date: 2018-09-14
UNIV OF SCI & TECH LIAONING
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  • Application Information

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Problems solved by technology

However, the application field of this method is too small to meet the domestic demand for the steel industry; at the same time, in order to improve the disadvantages of inconsistent burning speed of biomass in the sintering process, a passivation method for biomass fuel is proposed (patent application number 201210308218.4) to be applied to iron ore sintering
However, there are many problems in the above method, such as the complex process of the method, the need to spray and add different types of solvents and particles multiple times, which is not conducive to the improvement of industrial production efficiency, etc.

Method used

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  • Preparation method of modified biomass iron ore sintering additive
  • Preparation method of modified biomass iron ore sintering additive
  • Preparation method of modified biomass iron ore sintering additive

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Experimental program
Comparison scheme
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Embodiment 1

[0028] A preparation method of modified biomass iron ore sintering additive, the specific method comprises the following steps:

[0029] (1) After natural drying of straw, upgraded coal powder, bamboo materials, activated carbon and ginkgo leaves, crush to a particle size of about 0.3-0.5mm, and the moisture content is not higher than 3%. Then mix thoroughly according to the proportion.

[0030] (2) Place the biomass material mixed in step (1) in an industrial microwave for modification treatment; the treatment process parameters are microwave power of 0W, 200W, 300W, 400W and 500W, and the modification treatment time is 10min.

[0031] (3) Configure Ca 2+ Mother liquor: the mother liquor configured in this embodiment is Ca 2+ hydrochloride solution, weighed CaCl 2 350g powder reagent, mixed with 1000g pure water for blending and stirring, add a certain amount of CaO powder, check the pH of the mother liquor with pH test paper, so that the CaO in the prepared mother liquor ...

Embodiment 2

[0037] The mass batching method is used for batching, according to sintered ore TFe57%, SiO 2 4.82%, MgO2.0%, and alkalinity of 2.0 ore blending require ore blending, adding modified biomass additives with a ratio of 0.15%, sintering the blended iron ore mixture, and sintering each Item indicators are shown in Table 2. The metallurgical indicators and sintering waste gas detection results of adding modified biomass additives are shown in Table 3.

[0038] The finished product rate of sintered ore refers to the ratio of finished sintered ore to the total amount of sintered ore. The high yield of sintered ore affects the actual sintering productivity, and also affects the cost reduction and efficiency increase of sintering production and energy saving and emission reduction.

[0039]The higher the strength of the sintering drum, the less pulverized it is, and the better the air permeability in the blast furnace. To a certain extent, the better the drum index, the better the qu...

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Abstract

The invention belongs to the field of additive preparation and particularly relates to a preparation method of a modified biomass iron ore sintering additive, in particular to a preparation method ofa modified biomass additive capable of lowering exhaust emission in production of iron ores and improving the iron ore sintering quality. The preparation method comprises the following steps of step 1, crushing a biomass material, and putting the crushed biomass material in an industrial microwave oven for modification treatment; step 2, spraying the treated biomass material with a Ca2+ mother liquor; and step 3, fully and uniformly mixing the materials, performing continuous pressing for 1-2mins under the effect of pressure of 20Mpa, and preparing massive particles with the particle size being 8-12mm to obtain the modified biomass additive. The technical scheme of the invention has important significance of reasonably utilizing clean energy, increasing the utilization ratio of resources and promoting emission reduction and benefit increase of the sintering industry.

Description

technical field [0001] The invention belongs to the field of additive preparation, in particular to a preparation method of a modified biomass iron ore sintering additive, in particular to a modified biomass additive that can reduce waste gas emissions in iron ore production and improve iron ore sintering quality method of preparation. Background technique [0002] In the steel industry, NO x and SO 2 40%~60% of the total emissions of harmful gases come from the sintering process. In recent years, as my country has paid more attention to the comprehensive treatment of sintering flue gas in the iron and steel industry, the iron and steel industry has increased the intensity of sintering tail gas emission control. However, due to the large investment and high operating costs of exhaust gas treatment devices, and the immature related technologies, the emission reduction effect is very small. With the promulgation of a series of national sintering pollutant discharge standar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
CPCC22B1/16
Inventor 仇爽何志军邸航湛文龙张军红庞清海
Owner UNIV OF SCI & TECH LIAONING
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