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Direct steel making alloying metal oxide core-spun yarn and manufacturing method thereof

A steelmaking alloying and heavy metal oxide technology, applied in the field of direct steelmaking alloying process, can solve the problems of increased consumption of metal oxides, affecting the quality of steel products, low metal yield, etc., and achieve metal reduction yield Improvement, stability guarantee, and favorable penetration effect

Active Publication Date: 2016-08-03
MAANSHAN XINGDA METALLURGICAL NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the relatively low and unstable metal yield in the existing common mineral direct alloying steelmaking technology, thereby affecting the quality of the obtained steel products, increasing the consumption of metal oxides, and increasing the production cost Insufficiency of the invention provides a direct steelmaking alloyed metal oxide cored wire and its manufacturing method

Method used

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Effect test

Embodiment 1

[0038] A direct steelmaking alloyed metal oxide cored wire in this embodiment includes a sheath and a core powder. The core powder is a metal salt formed by mixing and calcining heavy metal oxides and alkaline earth metal carbonates plus a binder and reducing agent mixed. The heavy metal oxide can be selected from one or more combinations of molybdenum oxide, vanadium oxide, tungsten oxide, nickel oxide and niobium oxide powder according to the needs of actual smelting steel types (it is worth noting that the heavy metal oxide of the present invention In fact, the substances are not limited to the several substances listed here, and other substances can be selected according to the actual smelting requirements, and it is inconvenient to list them one by one here). In this embodiment, the smelted steel is 20CrMoTi steel, so heavy metal oxidation Molybdenum oxide (mass fraction≧50%) is selected as the material. Calcium carbonate (mass fraction≧90%) is selected as the alkaline e...

Embodiment 2

[0050]A direct steelmaking alloyed metal oxide cored wire in this embodiment includes a sheath and a core powder. The core powder is a metal salt formed by mixing and calcining heavy metal oxides and alkaline earth metal carbonates plus a binder and reducing agent mixed. The smelted steel in this embodiment is 09CrMoV steel, so molybdenum oxide and vanadium oxide are selected as heavy metal oxides, and their ratios are specifically determined according to the steel smelting requirements. The alkaline earth metal carbonates in this embodiment are barium carbonate, and the mixing ratio of heavy metal oxides and alkaline earth metal carbonates is 80%:15%. The above reducing agent is a combination of Al powder and C powder, and the mixing ratio of the metal salt particles and the reducing agent is 70%:30%. The mixed calcining temperature of the heavy metal oxide and the alkaline earth metal carbonate is 1100° C., and the calcining time is 4 hours.

[0051] The manufacturing meth...

Embodiment 3

[0058] A direct steelmaking alloyed metal oxide cored wire in this embodiment includes a sheath and a core powder. The core powder is a metal salt formed by mixing and calcining heavy metal oxides and alkaline earth metal carbonates plus a binder and reducing agent mixed. The heavy metal oxide is niobium oxide. Calcium carbonate is selected as the alkaline earth metal carbonates in this embodiment, and the mixing ratio of heavy metal oxides and alkaline earth metal carbonates is 90%:10%. The above reducing agent is a combination of Al powder, Si powder and C powder, and the mixing ratio of metal salt particles and reducing agent is 55%:45%. The mixed calcining temperature of the heavy metal oxides and alkaline earth metal carbonates is 1350° C., and the calcining time is 2 hours.

[0059] The manufacturing method of the above-mentioned direct steelmaking alloyed metal oxide cored wire in this embodiment, the steps are:

[0060] a. According to the needs of smelting steel, c...

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Abstract

The invention discloses a direct steel making alloying metal oxide core-spun yarn and a manufacturing method thereof, and belongs to the technical field of direct steel making alloying process. In the core-spun yarn, core powder thereof mainly adopts metal salt particles, with high stability, formed by performing high-temperature calcining for balls; and the balls are dryly pressed by metal oxides and alkaline earth metal carbonate. The manufacturing method of the core-spun yarn comprises the following steps: heavy metal oxides and alkaline earth metal carbonate are respectively crushed to proper particle sizes; then, a bonding agent is added for mixing to form balls for calcining; metal salt obtained through calcining is crushed, screened and classified; and after the obtained metal salt particles are uniformly mixed with a reducing agent according to a mass ratio, a core-spun yarn cover is used for coating to obtain the core-spun yarn. The core-spun yarn, manufactured by the method, alloys molten steel, so that the yield of the steel can be prominently improved, and the stability of the yield is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of direct steelmaking alloying technology, and more specifically relates to a direct steelmaking alloyed metal oxide cored wire and a manufacturing method thereof. Background technique [0002] The rapid development of modern industry and science and technology has put forward higher and higher requirements for the performance and economy of metal materials. Among them, alloy steel in iron and steel products is to further improve and enhance the performance of steel. During smelting, some special elements are purposefully added to carbon steel to make it have various special properties. Alloy steel has been widely used in my country's national defense and modernization construction, and is an important material cornerstone. [0003] At present, the main alloying elements are usually added to molten steel in the form of ferroalloy or simple metal during the steelmaking process, while ferroalloys such as ferr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C21C7/00
CPCC21C7/0056C22C33/006C22C33/04
Inventor 李国安王建国李寿全
Owner MAANSHAN XINGDA METALLURGICAL NEW MATERIAL
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