Method for producing low-sulfur hard coke for nodular cast iron

A technology of nodular cast iron and production method, which is applied in the field of cast iron production to achieve the effects of reducing cost, being beneficial to environmental protection and reducing sulfur content

Inactive Publication Date: 2006-08-09
杜保明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a huge flaw in the manufacturing method of ductile iron, that is, the coke used as a heat source for dissolving molten iron contains "sulfur components"

Method used

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  • Method for producing low-sulfur hard coke for nodular cast iron
  • Method for producing low-sulfur hard coke for nodular cast iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] When using coke for ordinary cast iron, the weight ratio of sulfur in ordinary cast iron iron water is:

[0023] 100kg×0.13×0.7%×0.5%=0.0455%

[0024] In the formula:

[0025] 100Kg is the weight of raw materials for ductile iron,

[0026] 0.13 is the ratio of low-sulfur coke for ductile iron relative to 100Kg raw material weight,

[0027] 0.7% Sulfur content of coke for ordinary cast iron,

[0028] 0.5% is the proportion of sulfur remaining in molten iron water,

[0029] 0.0455% is the proportion of sulfur in molten iron after ordinary cast iron is melted.

Embodiment 2

[0031] Use the low-sulfur coke iron water containing sulfur weight ratio for ductile castings of the present invention to be:

[0032] 100kg×0.13×0.35%×0.5%=0.02275%

[0033] In the formula:

[0034] 100Kg is the weight of raw materials for ductile iron,

[0035] 0.13 is the ratio of low-sulfur coke for ductile iron relative to 100Kg raw material weight,

[0036] 0.35% is to use the sulfur-containing ratio of low-sulfur coke for ductile iron of the present invention,

[0037] 0.5% is the proportion of sulfur remaining in molten iron water,

[0038] 0.02275% is the ratio of sulfur content in molten iron using the low-sulfur coke of the present invention.

Embodiment 3

[0040] The above formula is just a description for illustration. Actually, due to various reasons, the measured value of sulfur content in ordinary coke hot metal will be different. The value of sulfur content in ordinary coke hot metal measured in October 2003 has an average value of 0.108%.

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Abstract

This invention relates to a method for producing low S coke used in nodular cast iron, which classifies cokes used in ordinary cast iron and nodular cast iron by decoking then drying them to select those with low S to be thrown into the furnace, in which, low S coke can be got by this method to produce nodular cast iron.

Description

technical field [0001] The invention belongs to the technical field of cast iron production, in particular to a method for producing low-sulfur coke necessary for producing molten iron for ductile iron in an iron melting furnace. technical background [0002] About 2,000 years ago, humans entered the Iron Age and began to manufacture iron tools such as utensils and agricultural tools according to their own needs. Ironware at that time is our current "casting", 95% of which is iron, 4% is carbon, and the rest of the various elements are components from the raw material iron ore. At that time, the internal structure of the casting was linear. [0003] In the long history of 2000 years of development, people have made various efforts to reduce the specific gravity of carbon, greatly improving the performance of castings, and making cast iron stronger and more beautiful. And the toughness of the casting is increased to 3 times of the original, but it is impossible to further i...

Claims

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Application Information

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IPC IPC(8): C22C33/08C22C37/04
Inventor 小笠原金藏
Owner 杜保明
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