CN104711432A - Stainless steel dedusting recycling method - Google Patents
Stainless steel dedusting recycling method Download PDFInfo
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- CN104711432A CN104711432A CN201310691764.5A CN201310691764A CN104711432A CN 104711432 A CN104711432 A CN 104711432A CN 201310691764 A CN201310691764 A CN 201310691764A CN 104711432 A CN104711432 A CN 104711432A
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- stainless steel
- dedusting ash
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- steel ball
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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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Abstract
The invention discloses a stainless steel dedusting recycling method. The method comprises the following steps: 1, preparing a stainless steel dedusting mixture: adding 47-62kg of coal, 25-34kg of bentonite, 80-120kg of limestone, 42-61kg of silica, 5-8kg of alumina and 18-36kg of calcium carbide in deudsting of each ton of stainless steel, adding a proper amount of water and a reducing agent, and uniformly mixing to prepare the mixture; 2, carrying out cold sintering briquetting; 3, drying; 4, carrying out kiln feeding: sending stainless steel dedusting spheres to a rotary kiln; 5, carrying out rotary kiln smelting: preheating the dedusting spheres in the rotary kiln, dehydrating, adding the reducing agent, and reacting; 6, slagging: sending the stainless steel dedusting spheres out of the rotary kiln after slagging; and 7, carrying out magnetic separation: separating various valuable elements from the stainless steel dedusting spheres through a magnetic separation machine to obtain a finished product. The method has the advantages of stable production, and low recovery cost accounting for 1/3 of the electric furnace recovery cost.
Description
Technical field
The present invention relates to a kind of dedusting ash of stainless steel regeneration method.
Background technology
China's stainless steel industry is growing, and stainless steel plant's dedusting ash increases day by day, owing to containing the materials such as nickel, chromium, manganese in dedusting ash of stainless steel, easily causes serious pollution to environment.The domestic treatment process to dedusting ash of stainless steel has the following two kinds at present: 1. pressure ball returns to stainless steel plant and directly enters stove.2. factory's internal recycle is used as Sintering Blend.These two kinds for the treatment of processs, all because dedusting ash iron-holder is lower, steady in a long-termly can not be produced, are caused process for processing cost higher and can not popularize.
Summary of the invention
The present invention, for overcoming above-mentioned deficiency, provides a kind of administration measure, the dedusting ash of stainless steel regeneration method of low cost.
The present invention is main by the following technical solutions: a kind of dedusting ash of stainless steel regeneration method, comprises the following steps:
(1) dedusting ash of stainless steel compound
Following additive is added, coal: 47kg-62kg, bentonite: 25kg-34kg in dedusting ash per ton, Wingdale: 80kg-120kg, silica: 42kg-61kg, aluminum oxide: 5kg-8kg, calcium carbide: 18kg-36kg, then add suitable quantity of water and reductive agent, be mixed into mixture;
(2) cold junction pressure ball
The stainless steel dedusting mixture cold consolidation technique prepared in the first step is processed into dedusting ash of stainless steel ball, and dedusting ash of stainless steel spherolite footpath is ∮ 20mm-80mm;
(3) dry
Dedusting ash of stainless steel ball is sent in drying kiln, dries to dedusting ash of stainless steel ball surface without moisture;
(4) kiln is entered
After dedusting ash of stainless steel ball send into convolution kiln;
(5) kiln that circles round is smelted
The first preheating in convolution kiln of dedusting ash ball, dehydration, then add reductive agent and have an effect;
(6) slag making
After slag making, dedusting ash of stainless steel ball is sent from convolution kiln;
(7) magnetic separation
By magnetic separator, valuable element various in dedusting ash of stainless steel is elected, obtain finished product.
Following additive is added, coal: 53kg, bentonite: 30kg, Wingdale 100kg, silica 50kg, aluminum oxide 7kg, calcium carbide 30kg in dedusting ash of stainless steel per ton.
The present invention adds additive, water and reductive agent to dedusting ash of stainless steel, dedusting ash of stainless steel ball is processed into by cold consolidation technique, adopt the method for high temperature reduction that valuable element is wherein reclaimed in the reduction of dedusting ash of stainless steel ball after dry, administration measure, cost recovery is low, is only 1/3rd of electric furnace cost recovery.
Embodiment
Embodiment 1
In dedusting ash of stainless steel, the mass percentage of main chemical compositions is, nickel: 0.55%, chromium: 8.45%, manganese: 8.24%, iron: 35.02%, silicon-dioxide: 6.36%, calcium oxide: 5.86%, magnesium oxide: 2.15%, aluminium sesquioxide: 0.94%, sulphur: 0.26%, phosphorus: 0.02%, all the other are waste residue.
Dedusting ash of stainless steel regeneration method, comprises the following steps:
(1) dedusting ash of stainless steel compound
In dedusting ash per ton, add following additive, coal: 47kg, bentonite: 25kg, Wingdale: 120kg, silica: 42kg, aluminum oxide: 8kg, calcium carbide: 36kg, then add suitable quantity of water and reductive agent, be mixed into mixture;
Wherein the mass percentage of the chemical composition of coal is, fixed carbon: 54.3%, volatile matter: 28.3%, ash content: 13%, sulphur: 1.5%, phosphorus: 0.03%, water: 2.87%.
(2) cold junction pressure ball
The stainless steel dedusting mixture cold consolidation technique prepared in the first step is processed into dedusting ash of stainless steel ball, and dedusting ash of stainless steel spherolite footpath is ∮ 20mm-80mm;
(3) dry
Dedusting ash of stainless steel ball is sent in drying kiln, dries to dedusting ash of stainless steel ball surface without moisture;
(4) kiln is entered
After dedusting ash of stainless steel ball send into convolution kiln;
(5) kiln that circles round is smelted
The first preheating in convolution kiln of dedusting ash ball, dehydration, then add reductive agent and have an effect;
(6) slag making
After slag making, dedusting ash of stainless steel ball is sent from convolution kiln;
(7) magnetic separation
By magnetic separator, valuable element various in dedusting ash of stainless steel is elected, obtain finished product.
The mass percentage of the chemical composition obtained is nickel: 1.68%; Chromium: 16.9%, violent: 13.6%, carbon: 2.1%, silicon: 0.5%, sulphur: 0.6%, phosphorus: 0.042%, iron: 64%, all the other are inevitable impurity.
Embodiment 2
In dedusting ash of stainless steel, the mass percentage of main chemical compositions is, nickel: 0.55%, chromium: 8.45%, manganese: 8.24%, iron: 35.02%, silicon-dioxide: 6.36%, calcium oxide: 5.86%, magnesium oxide: 2.15%, aluminium sesquioxide: 0.94%, sulphur: 0.26%, phosphorus: 0.02%, all the other are waste residue.
Dedusting ash of stainless steel regeneration method, comprises the following steps:
(1) dedusting ash of stainless steel compound
In dedusting ash per ton, add following additive, coal: 47.2kg, bentonite: 34kg, Wingdale: 119kg, silica: 41.8kg, aluminum oxide: 7.5kg, calcium carbide: 35.9kg, then add suitable quantity of water and reductive agent, be mixed into mixture;
Wherein the mass percentage of the chemical composition of coal is, fixed carbon: 54.3%, volatile matter: 28.3%, ash content: 13%, sulphur: 1.5%, phosphorus: 0.03%, water: 2.87%.
(2) cold junction pressure ball
The stainless steel dedusting mixture cold consolidation technique prepared in the first step is processed into dedusting ash of stainless steel ball, and dedusting ash of stainless steel spherolite footpath is ∮ 20mm-80mm;
(3) dry
Dedusting ash of stainless steel ball is sent in drying kiln, dries to dedusting ash of stainless steel ball surface without moisture;
(4) kiln is entered
After dedusting ash of stainless steel ball send into convolution kiln;
(5) kiln that circles round is smelted
The first preheating in convolution kiln of dedusting ash ball, dehydration, then add reductive agent and have an effect;
(6) slag making
After slag making, dedusting ash of stainless steel ball is sent from convolution kiln;
(7) magnetic separation
By magnetic separator, valuable element various in dedusting ash of stainless steel is elected, obtain finished product.
The mass percentage of the chemical composition obtained is nickel: 1.65%; Chromium: 16.6%, violent: 15.5%, carbon: 2.0%, silicon: 0.7%, sulphur: 0.4%, phosphorus: 0.032%, iron: 63.1%, all the other are inevitable impurity.
Embodiment 3
In dedusting ash of stainless steel, the mass percentage of main chemical compositions is, nickel: 0.55%, chromium: 8.45%, manganese: 8.24%, iron: 35.02%, silicon-dioxide: 6.36%, calcium oxide: 5.86%, magnesium oxide: 2.15%, aluminium sesquioxide: 0.94%, sulphur: 0.26%, phosphorus: 0.02%, all the other are waste residue.
Dedusting ash of stainless steel regeneration method, comprises the following steps:
(1) dedusting ash of stainless steel compound
In dedusting ash per ton, add following additive, coal: 53kg, bentonite: 30kg, Wingdale: 100kg, silica: 50kg, aluminum oxide: 7kg, calcium carbide: 30kg, then add suitable quantity of water and reductive agent, be mixed into mixture;
Wherein the mass percentage of the chemical composition of coal is, fixed carbon: 54.3%, volatile matter: 28.3%, ash content: 13%, sulphur: 1.5%, phosphorus: 0.03%, water: 2.87%.
(2) cold junction pressure ball
The stainless steel dedusting mixture cold consolidation technique prepared in the first step is processed into dedusting ash of stainless steel ball, and dedusting ash of stainless steel spherolite footpath is ∮ 20mm-80mm;
(3) dry
Dedusting ash of stainless steel ball is sent in drying kiln, dries to dedusting ash of stainless steel ball surface without moisture;
(4) kiln is entered
After dedusting ash of stainless steel ball send into convolution kiln;
(5) kiln that circles round is smelted
The first preheating in convolution kiln of dedusting ash ball, dehydration, then add reductive agent and have an effect;
(6) slag making
After slag making, dedusting ash of stainless steel ball is sent from convolution kiln;
(7) magnetic separation
By magnetic separator, valuable element various in dedusting ash of stainless steel is elected, obtain finished product.
The mass percentage of the chemical composition obtained is nickel: 1.65%; Chromium: 16.3%, violent: 15.2%, carbon: 2.7%, silicon: 0.8%, sulphur: 0.4%, phosphorus: 0.032%, iron: 62.1%, all the other are inevitable impurity.
Embodiment 4
In dedusting ash of stainless steel, the mass percentage of main chemical compositions is, nickel: 0.55%, chromium: 8.45%, manganese: 8.24%, iron: 35.02%, silicon-dioxide: 6.36%, calcium oxide: 5.86%, magnesium oxide: 2.15%, aluminium sesquioxide: 0.94%, sulphur: 0.26%, phosphorus: 0.02%, all the other are waste residue.
Dedusting ash of stainless steel regeneration method, comprises the following steps:
(1) dedusting ash of stainless steel compound
In dedusting ash per ton, add following additive, coal: 62kg, bentonite: 25.1kg, Wingdale: 81kg, silica: 60.7kg, aluminum oxide: 5kg, calcium carbide: 18.2kg, then add suitable quantity of water and reductive agent, be mixed into mixture;
Wherein the mass percentage of the chemical composition of coal is, fixed carbon: 54.3%, volatile matter: 28.3%, ash content: 13%, sulphur: 1.5%, phosphorus: 0.03%, water: 2.87%.
(2) cold junction pressure ball
The stainless steel dedusting mixture cold consolidation technique prepared in the first step is processed into dedusting ash of stainless steel ball, and dedusting ash of stainless steel spherolite footpath is ∮ 20mm-80mm;
(3) dry
Dedusting ash of stainless steel ball is sent in drying kiln, dries to dedusting ash of stainless steel ball surface without moisture;
(4) kiln is entered
After dedusting ash of stainless steel ball send into convolution kiln;
(5) kiln that circles round is smelted
The first preheating in convolution kiln of dedusting ash ball, dehydration, then add reductive agent and have an effect;
(6) slag making
After slag making, dedusting ash of stainless steel ball is sent from convolution kiln;
(7) magnetic separation
By magnetic separator, valuable element various in dedusting ash of stainless steel is elected, obtain finished product.
The mass percentage of the chemical composition obtained is nickel: 1.56%; Chromium: 15.3%, violent: 16.1%, carbon: 2.8%, silicon: 0.8%, sulphur: 0.2%, phosphorus: 0.022%, iron: 63.1%, all the other are inevitable impurity.
Embodiment 5
In dedusting ash of stainless steel, the mass percentage of main chemical compositions is, nickel: 0.55%, chromium: 8.45%, manganese: 8.24%, iron: 35.02%, silicon-dioxide: 6.36%, calcium oxide: 5.86%, magnesium oxide: 2.15%, aluminium sesquioxide: 0.94%, sulphur: 0.26%, phosphorus: 0.02%, all the other are waste residue.
Dedusting ash of stainless steel regeneration method, comprises the following steps:
(1) dedusting ash of stainless steel compound
In dedusting ash per ton, add following additive, coal: 61.8kg, bentonite: 33.9kg, Wingdale: 80kg, silica: 61kg, aluminum oxide: 5.3kg, calcium carbide: 18kg, then add suitable quantity of water and reductive agent, be mixed into mixture;
Wherein the mass percentage of the chemical composition of coal is, fixed carbon: 54.3%, volatile matter: 28.3%, ash content: 13%, sulphur: 1.5%, phosphorus: 0.03%, water: 2.87%.
(2) cold junction pressure ball
The stainless steel dedusting mixture cold consolidation technique prepared in the first step is processed into dedusting ash of stainless steel ball, and dedusting ash of stainless steel spherolite footpath is ∮ 20mm-80mm;
(3) dry
Dedusting ash of stainless steel ball is sent in drying kiln, dries to dedusting ash of stainless steel ball surface without moisture;
(4) kiln is entered
After dedusting ash of stainless steel ball send into convolution kiln;
(5) kiln that circles round is smelted
The first preheating in convolution kiln of dedusting ash ball, dehydration, then add reductive agent and have an effect;
(6) slag making
After slag making, dedusting ash of stainless steel ball is sent from convolution kiln;
(7) magnetic separation
By magnetic separator, valuable element various in dedusting ash of stainless steel is elected, obtain finished product.
The mass percentage of the chemical composition obtained is nickel: 1.72%; Chromium: 15.8%, violent: 14.5%, carbon: 2.5%, silicon: 0.6%, sulphur: 0.7%, phosphorus: 0.028%, iron: 63.3%, all the other are inevitable impurity.
Claims (2)
1. a dedusting ash of stainless steel regeneration method, is characterized in that it comprises the following steps:
(1) dedusting ash of stainless steel compound is prepared
Following additive is added, coal: 47kg-62kg, bentonite: 25kg-34kg in dedusting ash per ton, Wingdale: 80kg-120kg, silica: 42kg-61kg, aluminum oxide: 5kg-8kg, calcium carbide: 18kg-36kg, then add suitable quantity of water and reductive agent, be mixed into mixture;
(2) cold junction pressure ball
The stainless steel dedusting mixture cold consolidation technique prepared in the first step is processed into dedusting ash of stainless steel ball, and dedusting ash of stainless steel spherolite footpath is ∮ 20mm-80mm;
(3) dry
Dedusting ash of stainless steel ball is sent in drying kiln, dries to dedusting ash of stainless steel ball surface without moisture;
(4) kiln is entered
Dedusting ash of stainless steel ball after drying is sent into convolution kiln;
(5) kiln that circles round is smelted
The first preheating in convolution kiln of dedusting ash of stainless steel ball, dehydration, then add reductive agent and have an effect;
(6) slag making
After slag making, dedusting ash of stainless steel ball is sent from convolution kiln;
(7) magnetic separation
By magnetic separator, valuable element various in dedusting ash of stainless steel is elected, obtain finished product.
2. dedusting ash of stainless steel regeneration method according to claim 1, is characterized in that: add following additive in dedusting ash of stainless steel per ton, coal: 53kg, bentonite: 30kg, Wingdale 100kg, silica 50kg, aluminum oxide 7kg, calcium carbide 30kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310691764.5A CN104711432A (en) | 2013-12-17 | 2013-12-17 | Stainless steel dedusting recycling method |
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| CN201310691764.5A CN104711432A (en) | 2013-12-17 | 2013-12-17 | Stainless steel dedusting recycling method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893794A (en) * | 2015-12-17 | 2017-06-27 | 参化（上海）能源科技有限公司 | Dedusting ash of stainless steel is smelted into the method and device of chromium ferronickel water using rotary furnace |
| CN107937711A (en) * | 2017-11-28 | 2018-04-20 | 酒泉钢铁(集团)有限责任公司 | A kind of dedusting ash of stainless steel treatment process |
| CN108823349A (en) * | 2018-06-15 | 2018-11-16 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of method of dedusting ash of stainless steel classified use |
-
2013
- 2013-12-17 CN CN201310691764.5A patent/CN104711432A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893794A (en) * | 2015-12-17 | 2017-06-27 | 参化（上海）能源科技有限公司 | Dedusting ash of stainless steel is smelted into the method and device of chromium ferronickel water using rotary furnace |
| CN106893794B (en) * | 2015-12-17 | 2019-07-02 | 参化（上海）能源科技有限公司 | Using rotary furnace by dedusting ash of stainless steel smelting at the method and device of chromium ferronickel water |
| CN107937711A (en) * | 2017-11-28 | 2018-04-20 | 酒泉钢铁(集团)有限责任公司 | A kind of dedusting ash of stainless steel treatment process |
| CN108823349A (en) * | 2018-06-15 | 2018-11-16 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of method of dedusting ash of stainless steel classified use |
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Application publication date: 20150617 |
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