CN104846145A - Novel technique for preheating and premelting steel scrape and efficiently making steel by electric furnace - Google Patents
Novel technique for preheating and premelting steel scrape and efficiently making steel by electric furnace Download PDFInfo
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- CN104846145A CN104846145A CN201510247349.XA CN201510247349A CN104846145A CN 104846145 A CN104846145 A CN 104846145A CN 201510247349 A CN201510247349 A CN 201510247349A CN 104846145 A CN104846145 A CN 104846145A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
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Abstract
The invention discloses a novel technique for preheating and premelting steel scrape and efficiently making steel by an electric furnace. The novel technique disclosed by the invention is characterized by comprising the following steps of removing mud or attached residual slags of cement on the surface of steel scrape by the impact of a high-pressure air gun; placing coke in a preheating pile, and then placing the cleaned steel scrape into a preheating device, and mounting a burner on the preheating device and continuously supplementing supply fuel for the burner; placing the preheated steel scrap into the electric furnace, wherein the adopted burner and an electrode are arranged at the electric furnace on the same furnace cover of the electric furnace; starting the electric furnace to enable flame and electric arc to simultaneously heat the steel scrap; performing hot charging and hot transportation on molten steel for filling the electric furnace with the molten steel, supplementing rest part of the steel scrape, adding a small quantity of lime and fluorite, and cooling the molten steel to obtain square or cylindrical steel. According to the novel technique, electric energy used in the preheating and premelting process of the steel scrape is greatly reduced.
Description
Technical field
The present invention relates to steel industry view, particularly relate to a kind of scrap steel preheating fritting, high efficient electric furnace steel-making novel process.
Background technology
Iron And Steel Industry is the important foundation industry of national economy, is the important symbol of national economy level and overall national strength.Nearly ten years, China's steel industry achieves significant progress, and iron and steel annual production continued to hold a post or title the first in the world continuously from 1996, and consumption also ranks first of the world.One of Iron And Steel Industry mainstay industry becoming China, constantly promotes the contribution rate that national economy increases.Meanwhile, along with the quick growth of China's economy, energy resource consumption constraint obviously manifests, energy availability and demand contradiction, the feature of high pollution, high energy consumption also make Iron And Steel Industry antifouling reduction of discharging, energy-saving and cost-reducing etc. in subject huge pressure.China's steel industry is traditional big power consumer, and from the data of National Energy Board's statistics, whole industry total energy consumption accounts for 14.71% of national total energy consumption, and annual coal consumption amount and water consumption all occupy every profession and trade prostatitis.Steel industry is again heavy polluter, and the quantity discharged of trade effluent accounts for 8.53% of industrial discharge total amount, and industrial dust discharged amount also accounts for 5.18% of industrial discharge total amount.On " 15 " basis, decline 20% is as target using per Unit GDP Energy Consumption for country's Eleventh Five-Year Plan, and metallurgy industry energy-saving and emission-reduction stand in the breach.So a kind of method of preheating fritting of steel scrap of save energy is very important.
Summary of the invention
The technical problem to be solved in the present invention overcomes existing defect, provides a kind of scrap steel preheating fritting, high efficient electric furnace steel-making novel process, comprise the following steps:
(1) process before preheating: remove the earth on steel scrap surface by the impact of high pressure air rifle or be attached to the residue of cement surface;
(2) the outer preheating of stove: first put into coke by primary heater unit, then steel scrap clear up is put in primary heater unit, and install burning chew on primary heater unit, and continue supplementaryly to supply fuel to it;
(3) preheating in stove: preheated steel scrap is put in electric furnace, what adopt here is burn the electric furnace chewed and to be contained in electrode on same bell, then electric furnace is started, flame and electric arc are heated steel scrap simultaneously, again molten steel hot-loading and hot-conveying is entered in electric furnace, supplement remainder steel scrap, add a small amount of lime, fluorite;
(4) melted molten steel is transported in mould, after overcooling, becomes box-shaped or cylindrical.
Be preferably, in described step (2), the total amount of coke is 0.1% ~ 0.2% of steel scrap weight.
Compared with prior art, the invention has the beneficial effects as follows: in the process of preheating fritting, first adopt the mode of the outer waste heat of stove, so just can make the temperature that steel scrap reaches certain, and in primary heater unit, put into coke, and just can increase steel so greatly entering into temperature front in electric furnace by burning the effect of chewing, thus reduce the time of steel scrap in electric furnace, thus the brief energy, and adopt the electric furnace burning and chew and to be contained in electrode on same bell, this reduces the time of to be put into by steel scrap in electric furnace, decrease the reduction of steel scrap temperature, further save energy.
Embodiment
Be embodiments of the invention below, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
A kind of scrap steel preheating fritting, high efficient electric furnace steel-making novel process, comprise the following steps:
(1) process before preheating: remove the earth on steel scrap surface by the impact of high pressure air rifle or be attached to the residue of cement surface;
(2) the outer preheating of stove: first put into coke by primary heater unit, then steel scrap clear up is put in primary heater unit, and install burning chew on primary heater unit, and continue supplementaryly to supply fuel to it;
(3) preheating in stove: preheated steel scrap is put in electric furnace, what adopt here is burn the electric furnace chewed and to be contained in electrode on same bell, then electric furnace is started, flame and electric arc are heated steel scrap simultaneously, again molten steel hot-loading and hot-conveying is entered in electric furnace, supplement remainder steel scrap, add a small amount of lime, fluorite;
(4) melted molten steel is transported in mould, after overcooling, becomes box-shaped or cylindrical.
In described step (2), the total amount of coke is 0.1% ~ 0.2% of steel scrap weight.
In the process of preheating fritting, first adopt the mode of the outer waste heat of stove, so just can make the temperature that steel scrap reaches certain, and in primary heater unit, put into coke, and just can increase steel so greatly entering into temperature front in electric furnace by burning the effect of chewing, thus reduce the time of steel scrap in electric furnace, thus the brief energy, and adopt the electric furnace burning and chew and to be contained in electrode on same bell, this reduces the time of to be put into by steel scrap in electric furnace, decrease the reduction of steel scrap temperature, further save energy.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. scrap steel preheating fritting, a high efficient electric furnace steel-making novel process, is characterized in that, comprise the following steps:
(1) process before preheating: remove the earth on steel scrap surface by the impact of high pressure air rifle or be attached to the residue of cement surface;
(2) the outer preheating of stove: first put into coke by primary heater unit, then steel scrap clear up is put in primary heater unit, and install burning chew on primary heater unit, and continue supplementaryly to supply fuel to it;
(3) preheating in stove: preheated steel scrap is put in electric furnace, what adopt here is burn the electric furnace chewed and to be contained in electrode on same bell, then electric furnace is started, flame and electric arc are heated steel scrap simultaneously, again molten steel hot-loading and hot-conveying is entered in electric furnace, supplement remainder steel scrap, add a small amount of lime, fluorite;
(4) melted molten steel is transported in mould, after overcooling, becomes box-shaped or cylindrical.
2. scrap steel preheating fritting according to claim 1, high efficient electric furnace steel-making novel process, is characterized in that: in described step (2), the total amount of coke is 0.1% ~ 0.2% of steel scrap weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510247349.XA CN104846145A (en) | 2015-05-14 | 2015-05-14 | Novel technique for preheating and premelting steel scrape and efficiently making steel by electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510247349.XA CN104846145A (en) | 2015-05-14 | 2015-05-14 | Novel technique for preheating and premelting steel scrape and efficiently making steel by electric furnace |
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|---|---|
| CN104846145A true CN104846145A (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510247349.XA Pending CN104846145A (en) | 2015-05-14 | 2015-05-14 | Novel technique for preheating and premelting steel scrape and efficiently making steel by electric furnace |
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| CN (1) | CN104846145A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107663561A (en) * | 2017-09-25 | 2018-02-06 | 云南曲靖呈钢钢铁（集团）有限公司 | A kind of smelting process of steel scrap stove external heat reuse |
| CN107916317A (en) * | 2017-10-24 | 2018-04-17 | 芜湖新兴铸管有限责任公司 | The heating unit and heating means of converter steel scrap |
| CN111659702A (en) * | 2020-06-15 | 2020-09-15 | 遵义永航再生资源利用有限公司 | Method for recycling and reprocessing scrap steel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899548A (en) * | 2010-08-10 | 2010-12-01 | 无锡西城特种船用板有限公司 | Novel process for scrap steel preheating and premelting and high-efficiency electric furnace steel making |
| CN202898453U (en) * | 2012-09-04 | 2013-04-24 | 树赢(国际)控股西安装备有限公司 | Environment-friendly and energy-saving horizontal charging steel scrap preheating electric arc furnace |
-
2015
- 2015-05-14 CN CN201510247349.XA patent/CN104846145A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899548A (en) * | 2010-08-10 | 2010-12-01 | 无锡西城特种船用板有限公司 | Novel process for scrap steel preheating and premelting and high-efficiency electric furnace steel making |
| CN202898453U (en) * | 2012-09-04 | 2013-04-24 | 树赢(国际)控股西安装备有限公司 | Environment-friendly and energy-saving horizontal charging steel scrap preheating electric arc furnace |
Non-Patent Citations (1)
| Title |
|---|
| 编辑委员会: "《钢铁工业节能减排新技术5000问》", 31 July 2009 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107663561A (en) * | 2017-09-25 | 2018-02-06 | 云南曲靖呈钢钢铁（集团）有限公司 | A kind of smelting process of steel scrap stove external heat reuse |
| CN107916317A (en) * | 2017-10-24 | 2018-04-17 | 芜湖新兴铸管有限责任公司 | The heating unit and heating means of converter steel scrap |
| CN111659702A (en) * | 2020-06-15 | 2020-09-15 | 遵义永航再生资源利用有限公司 | Method for recycling and reprocessing scrap steel |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150819 |