CN1465730A - Method for producing high speed tool steel - Google Patents
Method for producing high speed tool steel Download PDFInfo
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- CN1465730A CN1465730A CNA021131007A CN02113100A CN1465730A CN 1465730 A CN1465730 A CN 1465730A CN A021131007 A CNA021131007 A CN A021131007A CN 02113100 A CN02113100 A CN 02113100A CN 1465730 A CN1465730 A CN 1465730A
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- rapid tool
- tool steel
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Abstract
The method for extracting high-speed steel from grindings and abrasive disk dust of tool industry and smelting high-speed tool steel includes the following steps: (1) using magnetic iron to separate out steel powder containing noble alloy elements of W, Cr, Mo and V, etc. from tool grindings; and (2) smelting by using medium-frequency induction furance, when the furnace is opened, firstly, throwing te heavy waste steel and silicoferrite block material into the furnace, melting them to obtain molten steel, then adding steel powder obtained by step (1) to mave smelting. Said invention is high in yield and its product quality is stable and reliable.
Description
Affiliated technical field
The present invention relates to the method that a kind of utilization contains the metal waste refining rapid tool steel of rapid steel, particularly from the abrasive dust emery wheel ash of tool industry, extract the method for rapid steel smelting high-speed tool steel.
Background technology
In tool-making, produce a large amount of abrasive dust emery wheel ashes that contains valuable alloying elements such as W, Cr, Mo, V, the abrasive dust emery wheel of China ash waste material is used to mostly fill out that paving the way in the pool or piles up development and use yet so far when waste material.In controlling golden industry, the general comminuted steel shot that all adopts interior method of purification of stove and liquid flow method to sub-elect valuable alloying elements such as containing W, Cr, Mo, V, these two kinds of pretreated separating methods all need to drop into a large amount of equipment funds, and the recovery utilization rate of W, Cr, valuable alloying elements such as Mo, V is low.The production method that has is without pre-treatment, directly waste being thrown stove smelts, rapid tool steel harmful element content height, the final product quality instability produced, and this method adopts is three-phase ac electric arc furnace, and the power supply facility investment is big, cost is high, environmental pollution is serious.
Summary of the invention
The object of the present invention is to provide a kind ofly make the cost of rapid tool steel lower, production method that quality is higher.
The technical solution used in the present invention is: the present invention comprises following processing step successively:
(1) tool abrasive dust is sub-elected the comminuted steel shot of valuable alloying elements such as containing W, Cr, Mo, V with the magnet adhesive;
(2) smelt with medium-frequency induction furnace, drop into heavy steel scrap and silicon-iron block material during blow-on earlier and make it to be fused into molten steel, the comminuted steel shot that drops into again in the step (1) is smelted.
Prioritization scheme of the present invention is: before sub-electing comminuted steel shot with the magnet adhesive, with burning, pollutent is fallen in gasification with tool abrasive dust emery wheel ash elder generation, and this moment, saponified oil pollutent wherein belonged to stable on heating oils, the baked wheaten cake temperature must be reached to make the saponified oil after-flame more than 600 ℃.Through only remaining comminuted steel shot and emery wheel in the tool abrasive dust after the baked wheaten cake operation finally, through after the cooling of certain hour, adopt magnetic method to isolate comminuted steel shot.The comminuted steel shot that magneticly elects and 1%～15% calcium oxide, water three are reconciled into mixture, and mixture is suppressed block, enter the roaster baking, the moisture content in the block comminuted steel shot, oxygen can be taken off in bake process to the greatest extent, the stove that is ready to get the raw materials ready is into smelted.The present invention adopts medium-frequency induction furnace to smelt, the silicon-iron block material that drops into earlier 10%～25% the heavy steel scrap of smelting total steel amount and 1%～10% during blow-on is at furnace bottom, make it to be fused into earlier molten steel, as the guided bone melting process before smelting, the block comminuted steel shot of Tou Ruing just can fully fusing in molten steel afterwards.Under the situation of not putting out stove, stay a little molten steel in stove, just can draw molten having acted on for a long time when coming out of the stove later on less at every turn.As not adopting the melting method that draws before the above-mentioned smelting, block comminuted steel shot only can be rubescent in stove and do not melt.Block comminuted steel shot drawn be melt into merit after, when normally smelting, deoxidation, reductive operation are crucial, directly influence the quality of rapid tool steel.The present invention adopts fed batch, carries out three deoxidations, reduction process, and the one, with silicon-iron block material pre-deoxidation reduction, the 2nd, carry out the diffusive deoxidation reduction with alundum, the 3rd, carry out final deoxidation and reduction with waste and old fine aluminium material.After three deoxidation and reduction processes, deoxidation fully, but reduce not thorough, comminuted steel shot in smelting this moment also contains a certain amount of oxide compound fails to reduce, this will hinder the unimpeded of medium-frequency induction furnace electromagnetic field, influences temperature transmission effect in the stove, to this, the present invention's Graphite Powder 99 of trace interpolation constantly in smelting process is made reductive agent, makes oxide compound be reduced into steel in time.At last, wait and smelt when molten steel is expired soon in the stove, find that white appears in slag in stove, just can be to its sampling analysis, rapid tool steel is carried out refining, and time and specification of quality and traditional method are suitable, the rapid tool steel that can obtain model, meet GB, has good quality.
Aforementioned production method is owing to sub-elect comminuted steel shot with magnetic method, rate of recovery height earlier; Owing to adopted the medium-frequency induction furnace smelting, invest little, cost is low; Before smelting,, make the reliable in quality of finished product stable owing to adopt heavy steel scrap and silicon-iron block material to do the guided bone fusing.
Embodiment
Embodiment: adopt magnet to close principle, the tool abrasive dust emery wheel ash that will contain valuable alloying elements such as a certain amount of W, Cr, Mo, V, after with special magnetic separator the emery wheel end being separated, only be left to have contained the comminuted steel shot of valuable alloying elements such as W, Cr, Mo, V, smelt with medium-frequency induction furnace, drop into heavy steel scrap and silicon-iron block material at furnace bottom earlier during blow-on, make it to be fused into earlier molten steel, the comminuted steel shot that sub-elects is dropped in the molten steel smelt again.
Claims (8)
1. the production method of a rapid tool steel is characterized in that comprising successively following processing step:
(1) tool abrasive dust is sub-elected the comminuted steel shot of valuable alloying elements such as containing W, Cr, Mo, V with the magnet adhesive,
(2) smelt with medium-frequency induction furnace, drop into heavy steel scrap and silicon-iron block material during blow-on earlier and make it to be fused into molten steel, the comminuted steel shot that drops into again in the step (1) is smelted.
2. the production method of a kind of rapid tool steel according to claim 1 is characterized in that: in the step (1), before described magnet adhesive sub-elects comminuted steel shot, also have the step that earlier tool abrasive dust is cleared the pollution off with the baked wheaten cake method.
3. the production method of a kind of rapid tool steel according to claim 1 is characterized in that: the comminuted steel shot that also needs to sub-elect in the step (1) is pressed to block.
4. the production method of a kind of rapid tool steel according to claim 1 is characterized in that: above-mentioned steps (2) comminuted steel shot is smelted in the time-histories, and drop into ferrosilicon material, alundum and fine aluminium material in order reaches abundant deoxidation and partial reduction step in batches in addition.
5. the production method of a kind of rapid tool steel according to claim 4 is characterized in that: also need the Graphite Powder 99 of trace use constantly to reach abundant reduction in smelting time-histories.
6. the production method of a kind of rapid tool steel according to claim 3 is characterized in that: described comminuted steel shot is pressed to blocky method comminuted steel shot and calcium oxide and water mediation is pressed into.
7. the production method of a kind of rapid tool steel according to claim 1 is characterized in that: the heavy steel scrap, the silicon-iron block material that drop in the step (2) account for 10%～25%, 1%～10% of total steel amount respectively.
8. the production method of a kind of rapid tool steel according to claim 2, it is characterized in that: the temperature of described baked wheaten cake method should be higher than 600 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02113100 CN1277944C (en) | 2002-06-03 | 2002-06-03 | Method for producing high speed tool steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02113100 CN1277944C (en) | 2002-06-03 | 2002-06-03 | Method for producing high speed tool steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1465730A true CN1465730A (en) | 2004-01-07 |
| CN1277944C CN1277944C (en) | 2006-10-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02113100 Expired - Fee Related CN1277944C (en) | 2002-06-03 | 2002-06-03 | Method for producing high speed tool steel |
Country Status (1)
| Country | Link |
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| CN (1) | CN1277944C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703681A (en) * | 2012-06-01 | 2012-10-03 | 句容市恒祥金属再生利用有限公司 | Method for recovering high-speed tool steel from grinding wheel ash |
| CN103230922A (en) * | 2013-04-15 | 2013-08-07 | 河北钢铁股份有限公司邯郸分公司 | Fibrous roller abrasive dust recycling method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086587B (en) * | 2016-06-14 | 2018-02-23 | 北京工业大学 | A kind of high-boron high-speed steel containing aluminium and preparation method thereof |
-
2002
- 2002-06-03 CN CN 02113100 patent/CN1277944C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703681A (en) * | 2012-06-01 | 2012-10-03 | 句容市恒祥金属再生利用有限公司 | Method for recovering high-speed tool steel from grinding wheel ash |
| CN103230922A (en) * | 2013-04-15 | 2013-08-07 | 河北钢铁股份有限公司邯郸分公司 | Fibrous roller abrasive dust recycling method |
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| Publication number | Publication date |
|---|---|
| CN1277944C (en) | 2006-10-04 |
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Granted publication date: 20061004 Termination date: 20140603 |