Composite carbon containing pellet

A technology of pellets and metals, which is applied in the field of carbon-containing pellets for iron and steel smelting. It can solve the problems of failing to meet the requirements of carbon increase and poor carbon increase effect, and achieve the reduction of inclusions, high compressive strength, and refined grain size. grain effect

Inactive Publication Date: 2006-06-14
李继宗 +2
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the main disadvantage of the carbon-containing pellets is that the carburization effect is

Method used

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Experimental program
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Embodiment

[0030] According to the chemical components of the composite carbon-containing pellets of the present invention, 5 batches of composite carbon-containing pellets were prepared, and the specific chemical components are shown in Table 1. The prepared 5 batches of composite carbon-containing pellets were respectively subjected to a recarburization test in a 30-ton electric furnace steelmaking. The composite carbon-containing pellets and scrap steel were added to the electric furnace to start smelting. During the smelting process, the scrap steel was first measured. Time (end of oxidation) the carbon content of molten steel, the measurement results are listed in Table 2. Table 2 also lists the added amount of composite carbon-containing pellets and the compressive strength of a single sphere. For comparison, the recarburizer pig iron nuggets and coke nuggets were added to the same electric furnace to carry out a recarburization test. The test results are also listed in Table 2. It can...

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PUM

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Abstract

The invention belongs to ferrous metallurgy field. It mainly relates to steel smelting carbon containing ball, especially electric furnace using scrap steel making or cast steel carburetion. The compound carbon containing ball chemical compositions (wt%)are containing material 40-80%, metal oxide 10-42%, rare earth oxide 5-30%, bonding agent 2-10%, reinforcing agent 1-5%, expansion agent 1-5%, and steel products processing smear metal 1-4%. Its intensity is high; mono ball compressive strength can reach more than 5Mpa. It can be add into the molten steel to increase carbon, reduce inclusion, removing harmful gas, purify grain boundary, and refine grain to improve steel toughness.

Description

Technical field [0001] The invention belongs to the field of iron and steel metallurgy, and mainly relates to carbon-containing pellets for iron and steel smelting. Background technique [0002] As the name implies, the carbon-containing pellets contain a certain amount of carbon, such as coke, coal, graphite carbon, and charcoal. In the field of iron and steel metallurgy, in different processes, due to the requirements of a certain metallurgical process, different carbon-containing pellets are used, but ordinary carbon-containing pellets for metallurgy have low carbon content and generally do not exceed 30%, such as pellets used in the production of sponge iron, usually contain 10-20% carbon, and its function is to use carbon as a reducing agent during the entire roasting process; iron-containing sintering used in the production process of blast furnace or shaft furnace The pellets are generally mixed with 5% coke powder, and the carbon in it is used as a heating agent and binde...

Claims

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Application Information

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IPC IPC(8): C21B13/00C22B5/10
CPCY02P10/20
Inventor 肖卫学平尾外志雄李继宗丰田哲夫杜浩
Owner 李继宗
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