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Sintering method of solid-free fossil fuel based on multi-component gas medium and waste biomass coupling heat supply

A technology for waste biomass and biomass fuel, applied in the field of iron and steel metallurgy, can solve the problems of shortening the holding time and maximum temperature of the high temperature zone of mineral melting, destroying the speed matching of the combustion front and the heat transfer front, and increasing the adverse effects, and achieves a high level of improvement. Heat transfer front speed, efficient release, and the effect of promoting combustion

Pending Publication Date: 2022-06-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although biomass fuel is clean and renewable, its high combustion reactivity on the one hand makes the amount of CO produced in the combustion process higher than that of conventional fossil fuels;

Method used

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  • Sintering method of solid-free fossil fuel based on multi-component gas medium and waste biomass coupling heat supply
  • Sintering method of solid-free fossil fuel based on multi-component gas medium and waste biomass coupling heat supply

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030]实施例1

[0031]将铁矿石、木质炭、熔剂(生石灰、石灰石、白云石)、返矿分别按照表1所示的质量百分比进行配料，其中木质炭的特性参数如表3所示，经过混合、制粒后，将混合料布到烧结台车，在温度1050±50℃的条件下点火1min，然后在负压14kPa条件下进行烧结。将烧结机内烧结料面从点火结束至烧结终点之间的区域均分为区域Ⅰ、区域II、区域Ⅲ，烧结过程中向区域Ⅰ喷入复合气体特征为焦炉煤气体积百分比1.0％、水蒸汽体积百分比0.20％、其余为空气，区域II喷入复合气体特征为焦炉煤气体积百分比0.5％、水蒸汽体积百分比0.2％，其余为100℃热风，区域Ⅲ喷入复合气体特征为水蒸汽体积百分比0.2％，其余为150℃热风。烧结产量、质量指标如表4所示。

Example Embodiment

[0032]实施例2

[0033]将铁矿石、木质炭、熔剂(生石灰、石灰石、白云石)、返矿分别按照表1所示的质量百分比进行配料，其中木质炭的特性参数如表3所示，经过混合、制粒后，将混合料布到烧结台车，在温度1050±50℃的条件下点火1min，然后在负压14kPa条件下进行烧结。将烧结机内烧结料面从点火结束至烧结终点之间的区域均分为区域Ⅰ、区域II、区域Ⅲ，烧结过程中向区域Ⅰ喷入复合气体特征为焦炉煤气体积百分比1.5％、水蒸汽体积百分比0.20％、其余为空气，区域II喷入复合气体特征为焦炉煤气体积百分比1.0％、水蒸汽体积百分比0.2％，其余为100℃热空气，区域Ⅲ喷入复合气体特征为水蒸汽体积百分比0.2％，其余为150℃热风。烧结产量、质量指标如表4所示。

Example Embodiment

[0034]实施例3

[0035]将铁矿石、木质炭、熔剂(生石灰、石灰石、白云石)、返矿分别按照表1所示的质量百分比进行配料，其中木质炭的特性参数如表3所示，经过混合、制粒后，将混合料布到烧结台车，在温度1050±50℃的条件下点火1min，然后在负压14kPa条件下进行烧结。将烧结机内烧结料面从点火结束至烧结终点之间的区域均分为区域Ⅰ、区域II、区域Ⅲ，烧结过程中向区域Ⅰ喷入复合气体特征为焦炉煤气体积百分比1.5％、水蒸汽体积百分比0.20％、其余为空气，区域II喷入复合气体特征为焦炉煤气体积百分比1.0％、水蒸汽体积百分比0.2％，其余为150℃热空气，区域Ⅲ喷入复合气体特征为水蒸汽体积百分比0.2％，其余为250℃热风。烧结产量、质量指标如表4所示。

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Abstract

The invention discloses a solid-free fossil fuel sintering method based on multi-component gas medium and waste biomass coupling heat supply, and the sintering method comprises the following steps: completely replacing fossil fuel with biomass fuel, mixing the biomass fuel with sintered ore raw materials, granulating, distributing the obtained granules, and igniting and sintering in a sintering machine; in the sintering process, according to the difference of heat distribution of different areas of a material layer, the proportion of combustible and combustion-supporting components in gas media and the temperature of hot waste gas are comprehensively regulated and controlled, different multi-component gas media are guided into different areas respectively, sufficient heat is provided for material sintering, the matching performance of material layer heat transfer and fuel combustion can be regulated and controlled, and the sintering efficiency is improved. According to the method, the heat distribution of a material layer is balanced and reasonable, the defect that conventional sintering depends on single fossil fuel for heat supply is overcome, the production of COx, SOx and NOx can be effectively controlled from the source while the sinter with uniform quality is produced, and the economic and environment-friendly advantages are remarkable.

Description

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Claims

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Application Information

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IPC IPC(8): C22B1/16C22B1/245
CPCC22B1/16C22B1/245
Inventor 季志云范晓慧甘敏王一帆李浩锐陈许玲黄晓贤孙增清武钰丰来睿思袁礼顺
Owner CENT SOUTH UNIV