Method for performing resource utilization of sludge biocarbon

A biochar and resource-based technology, applied in the field of metallurgical sintering, can solve the problems of high environmental risks of land use and the inability of large-scale utilization of sludge biochar, so as to avoid the accumulation of heavy metal pollution, reduce solid fuel consumption, and reduce the proportion of fuel. Effect

Active Publication Date: 2018-12-21
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for resource utilization of sludge biochar that overcomes the

Method used

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  • Method for performing resource utilization of sludge biocarbon
  • Method for performing resource utilization of sludge biocarbon
  • Method for performing resource utilization of sludge biocarbon

Examples

Experimental program
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Example Embodiment

[0026] Example 1:

[0027] The current sintering standard batching situation is shown in Table 1. Table 2 is the main chemical composition table of sintered iron-containing raw materials, and the chemical composition of sludge biochar is shown in Table 3.

[0028] Table 1 Composition table of existing sintering standard ingredients (mass percentage)

[0029]

[0030]

[0031] Table 2 Contents of main components of sintered iron-containing raw materials (mass percentage)

[0032]

[0033] Table 3 Chemical composition of sludge biochar (mass percentage)

[0034] composition

[0035] Preparation of pellets: mix sludge biochar and rolled steel scale at a weight percentage of 60%:40% and mix them evenly, add water to adjust to a moisture content of 18%, and use discs to granulate to prepare 0.5-3mm pellets ;

[0036] Preparation of the sintering mixture: The added amount of the granular material obtained above is 8% of the dry basis mass of the existing sintering standard ingredients....

Example Embodiment

[0042] Example 2

[0043] According to the scheme of the present invention, the sludge biochar and the rolled steel scale are mixed in a weight percentage ratio of 80%:20%, and pelletized by a disc to prepare 0.5-3mm pellets; the pellets are 5% by mass The ratio was mixed into the existing sintering material involved in Example 1 to prepare a sintering mixture, and then 650mm thick material layer was sintered. The sintering test results show that compared with the sintering method without granular material and adopting 550mm non-thick material layer, the sintering utilization factor is increased by 6.1%, and the solid fuel consumption is reduced by 1.3kg / T.

Example Embodiment

[0044] Example 3

[0045] According to the scheme of the present invention, the sludge biochar and the rolled steel scale are mixed in a weight percentage ratio of 70%: 30%, and pelletized by a disc to prepare 0.5-3mm pellets; the pellets are made at a mass ratio of 3% Proportioned into the mixture, and then 700mm thick layer sintering test. The sintering test results show that: compared with the sintering method without granular material and adopting 550mm non-thick material layer, the sintering utilization factor is increased by 6.5%, and the solid fuel consumption is reduced by 1.8kg / T.

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Abstract

The invention discloses a method for performing resource utilization of sludge biocarbon. The method comprises the following steps: uniformly mixing the sludge biocarbon, water and auxiliaries and performing granulation to obtain granulated materials; mixing the granulated materials with original sintering base ingredients to obtain a sintering mixed material; performing sintering on a conventional metallurgical sintering machine to obtain sintered ores; feeding the sintered ores as iron-making raw materials into a high blast smelting. According to the method disclosed by the invention, valuable components in the sludge biocarbon can be effectively utilized, the components and the performance of the sintered ores are adjusted, and the cost of the sintering raw materials is reduced; and 3 percent to 8 percent of carbon contained in the biocarbon can be used as supplementary energy sources for sintering, so that the cost of fuels is reduced. According to the method, a new path is provided for scale utilization of sludge pyrolysis terminal products, the sludge biocarbon is used as the raw material for high blast smelting, so that accumulated pollution of heavy metal which potentiallyexists in the land utilization process is completely avoided, and the method is particularly suitable for performing resource utilization of sludge pyrolysis which contains superstandard content of heavy metal. The method disclosed by the invention has the advantages of simpleness, practicability, less investment, low cost and environmental protection.

Description

technical field [0001] The invention relates to the field of metallurgical sintering, in particular to a method for resource utilization of sludge biochar. Background technique [0002] As the main raw material for blast furnace production, sinter plays an important role in blast furnace production, especially in the context of the rapid development of my country's iron and steel enterprises in recent years, the annual output of sinter is hundreds of millions of tons. Iron ore powder sintering is a method of agglomeration. Its principle is to mix fine-grained iron-containing raw materials with fuel and flux in a certain proportion, add water to moisten and mix to make sintering mixture, and then distribute it on the sintering machine. , draft, and use the fuel in the sintering material to burn to generate high temperature, and then a series of physical and chemical changes will occur to form some low-melting point substances, and soften and melt to produce a certain amount o...

Claims

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Application Information

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IPC IPC(8): C22B1/16C22B1/24
CPCC22B1/16C22B1/2406Y02P10/20
Inventor 余广炜汪印
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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