CN102925709A - Method for melting solid frozen slag layer by using melting furnace - Google Patents
Method for melting solid frozen slag layer by using melting furnace Download PDFInfo
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- CN102925709A CN102925709A CN2012104800562A CN201210480056A CN102925709A CN 102925709 A CN102925709 A CN 102925709A CN 2012104800562 A CN2012104800562 A CN 2012104800562A CN 201210480056 A CN201210480056 A CN 201210480056A CN 102925709 A CN102925709 A CN 102925709A
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Abstract
A method for melting a solid frozen slag layer by using a melting furnace belongs to the field of non-ferrous metallurgy, and particularly relates to a thermometallurgy production method for melting the solid frozen slag layer by using an Ausmelt spray gun to be top-blown and immersed in the melting furnace. The spray gun is inserted into the melting furnace from the center of the top of the melting furnace, the head part of the spray gun is immersed inside the slag layer of a melting body, air, oxygen and fuel required for smelting technology are sprayed into a melting pool through the spray gun, concentrates are added from a charging opening of the top of the melting furnace, under the action of high-speed air flow at the tail end of the spray gun, the melting pool performs vigorous agitation, the materials quickly melt and react, and the melting product comprises nickel matte, furnace slag and smoke. The nickel matte and the furnace slag are mixed into a melting body and enter a sedimentation electric furnace for nickel-slag separation, and the nickel matte is converted by a converter into nickelic matte. The smoke is used for preparing acid through waste heat recovery of a waste heat boiler and dust collection. The technique has the advantages of simplicity and convenience for operation, high efficiency, low energy consumption, environmental protection, wide adaptation, and facilitation of popularization and application.
Description
Technical field
The invention belongs to the Non-ferrous Metallurgy field, particularly relate to a kind of solid-state pyrometallurgy production method of freezing slag blanket of Australia Si Maite top-submerged lance submergence smelting furnace fusing of utilizing.
Background technology
Australia Si Maite top blast submergence smelting process belongs to the bath smelting category, and this technology adheres to Australian Australia Si Maite and Ai Sa company separately, transfers the possession of with Australia Si Maite and Ai Sa legitimate name respectively.Be widely used in the fields such as copper, tin, lead, iron and steel, development in recent years is very fast.Duo Jia comes into operation the smeltery at home.
The Ausmelt smelting furnace body is vertical round shape, in refractory liner is arranged, refractory materials is the chromium-aluminium spinel refractory brick of Great Wall, Jinzhou company, the thickness of refractory brick in stove is 460mm.For improving life-span and the operating rate of refractory materials and stove, used the water-cooled copper water jacket at the stove side wall, the copper water jacket total height is that 6000mm(is from the above 540mm of furnace bottom central plane), by the stove steel structure support, have 48 water-cooled copper water jackets and line up 16 groups of 3 rows (arranging from top to bottom), copper water jacket inside is cast with copper pipe, refractory brick in the water flowing cool furnace, and the copper water jacket outside surface is with boss.
After the long-time blowing out of Ausmelt smelting furnace, keep the slag blanket of certain altitude in the stove, this slag blanket can be frozen in the stove, again need to be fused into fused solution during blow-on, then could begin normal production.Need badly in the middle of the prior art in sum and want a kind of technology to solve problems.
Summary of the invention
Technical problem to be solved by this invention is: a kind of metallurgical method that utilizes spray gun to melt the solid-state slag blanket that freezes is provided, after solving the long-time blowing out of Ausmelt smelting furnace, keeps the problem of freezing slag blanket of certain altitude in the stove.
A kind of solid-state method of freezing slag blanket of smelting furnace fusing of using is characterized in that may further comprise the steps:
Step 1, light spray gun, the special-purpose fine coal required standard of spray gun is moisture content≤1%, granularity≤1mm, d
80=0.15mm i.e. 80% above pulverized coal particle diameter is 0.15mm, and oxygen-rich concentration is 30%, and spray gun inserts in the smelting furnace from melting furnace roof center, and lump coal adds from melting furnace roof charging opening;
Step 2, air, oxygen, fuel spray into slag bath by spray gun, and the head of spray gun is fixed on the solid-state of slag bath top and freezes on the slag blanket when beginning, and this solid-state slag blanket that freezes is more than 1 meter;
After step 3, the process operation of step 2, the solid-state slag blanket that freezes on slag bath top has melted liquid molten bath, add lump coal this moment, spray gun is lower inserting gradually, under the action of high-speed airflow of spray gun end, melt the molten bath that and increased gradually to whole solid-state slag blankets that freezes by the part, then melt whole solid-state slag blankets that freezes;
Step 4, the head of spray gun is immersed in the slag blanket in the operating process of step 3, Yi Bian melt the solid-state slag blanket that freezes, Yi Bian regulate the slag type, the laboratory is delivered in sampling in per 20 minutes, and constituent adjustment slag type per sample, when be melted to do not have solid-state freeze slag blanket after, open discharge outlet and discharge;
Step 5, the solid-state smelted product that freezes to produce in the process of slag blanket of fusing have smelting slag, flue gas, and wherein smelting slag is the blend melt of nickel matte and slag, contains sulfur dioxide gas in the flue gas;
Smelting slag enters the sedimentation electric furnace and realizes that the nickel slag separates, and nickel matte is through bessemerizing into high nickel matte, flue gas through the waste heat boiler waste heat recovery, gather dust after relieving haperacidity.
Described fine coal is that raw coal is crossed through grinding of ball grinder and made.Described oxygen is 99.9% oxygen.The weight of nickel accounts for 1.2% ~ 1.8% of smelting slag weight in the described smelting slag.The weight of copper accounts for 0.2% ~ 0.5% of smelting slag weight in the smelting slag.The weight of iron accounts for 33% ~ 40% of smelting slag weight in the smelting slag.The weight of silicon-dioxide accounts for 32% ~ 40% of smelting slag weight in the smelting slag.
By above-mentioned design, the present invention can bring following beneficial effect: the present invention adopts spray gun to insert in the stove from the furnace roof center, and gun head is immersed in the slag blanket of melt, and the needed air of smelting technology, oxygen, fuel spray into the molten bath by spray gun.Concentrate adds from the top filling mouth, under the action of high-speed airflow of spray gun end, and the molten bath vigorous agitation, material melts rapidly and reacts, and smelted product has nickel matte, slag, flue gas.Nickel matte and slag enter the sedimentation electric furnace with the form of blend melt and realize that the nickel slag separates, and nickel matte passes through bessemerizes into high nickel matte.Flue gas through the waste heat boiler waste heat recovery, gather dust after relieving haperacidity.
Processing method of the present invention namely eliminated the problem of frozen slag layer on the slag bath effectively, well solved again the recovery problem of smelting slag, flue gas, the pollution that has not only improved the working efficiency of Ausmelt smelting furnace but also can not produce slag and flue gas.This processing method efficient easy and simple to handle is high, energy consumption is little, and environmental protection adapts to wide, is conducive to apply.
Embodiment
Embodiment 1
Normal Australia stove melts solid-state frozen slag layer operation, and the material of adding is lump coal; When melting liquid molten bath, need to add the high ferro material and adjust the slag type, for discharging smoothly, slag creates conditions.
Table 1 adds the composition of lump coal:
Table 2 high ferro material (1. converter slag) composition:
| ? | Ni | Cu | Co | Fe | S | CaO | MgO | SiO 2 | Al 2O 3 |
| 1 | 1.22 | 0.32 | 0.24 | 52.8 | 1.53 | 0.22 | 1.47 | 28.4 | 0.3 |
Table 3 high ferro material (2. low nickel matte) composition:
| Ni | Cu | Co | Fe | S |
| 12.45 | 0.169 | 0.129 | 58.13 | 24.35 |
The solid-state slag blanket information slip that freezes of table 4 spray gun fusing
| Sequence number | Time | Rifle position (m) | Fine coal (t/h) | Remarks |
| 1 | 19：33 | 1694 | 2000 | 7:33 divides and begins to melt the solid-state slag blanket that freezes |
| 2 | 19：50 | 1635 | 2000 | ? |
| 3 | 20：19 | 1632 | 1996 | ? |
| 4 | 20：21 | 1382 | 2015 | ? |
| 5 | 21：01 | 1329 | 2029 | ? |
| 6 | 21：20 | 1269 | 2301 | Begin to have liquid molten bath in the 9:40 stove |
| 7 | 21：36 | 1021 | 1949 | ? |
| 8 | 22：32 | 936 | 2026 | The 22:34 discharging, melt pool height 500mm |
| 9 | 23：34 | 929 | 1973 | ? |
| 10 | 0：33 | 929 | 2020 | Add the high ferro material, low nickel matte is regulated the slag type |
| 11 | 1：26 | 929 | 1961 | Discharging 1# mouth begins to feed in raw material |
| 12 | 3:01 | 1027 | 2881 | ? |
Table 5 Australia stove product Australia slag composition is as follows:
| Ni | Cu | Co | Fe | S | CaO | MgO | SiO 2 | Al 2O 3 | Fe 3O 4 |
| 1.29 | 0.074 | 0.071 | 35.38 | 2.27 | 1.2 | 2.8 | 24.12 | 2.94 | 5.7 |
Above-mentioned example is complete melting process in the situ production.
Embodiment 2:
Normal Australia stove melts solid-state frozen slag layer operation, and the material of adding is lump coal; When melting liquid molten bath, need to add the high ferro material and adjust the slag type, for discharging smoothly, slag creates conditions.
Table 1 adds the composition of lump coal:
Table 2 high ferro material (1. converter slag) composition:
| ? | Ni | Cu | Co | Fe | S | CaO | MgO | SiO 2 | Al 2O 3 |
| 1 | 1.22 | 0.32 | 0.24 | 52.8 | 1.53 | 0.22 | 1.47 | 28.4 | 0.3 |
Table 3 high ferro material (2. low nickel matte) composition:
| Ni | Cu | Co | Fe | S |
| 12.45 | 0.169 | 0.129 | 58.13 | 24.35 |
The solid-state slag blanket information slip that freezes of table 4 spray gun fusing
Table 5 Australia stove product Australia slag composition is as follows:
| Ni | Cu | Co | Fe | S | CaO | MgO | SiO 2 | Al 2O 3 | Fe 3O 4 |
| 1.29 | 0.074 | 0.071 | 35.38 | 2.27 | 1.2 | 2.8 | 24.12 | 2.94 | 5.7 |
Claims (7)
1. one kind is used the solid-state method of freezing slag blanket of smelting furnace fusing, it is characterized in that may further comprise the steps:
Step 1, light spray gun, the special-purpose fine coal required standard of spray gun is moisture content≤1%, granularity≤1mm, d
80=0.15mm i.e. 80% above pulverized coal particle diameter is 0.15mm, and oxygen-rich concentration is 30%, and spray gun inserts in the smelting furnace from melting furnace roof center, and lump coal adds from melting furnace roof charging opening;
Step 2, air, oxygen, fuel spray into slag bath by spray gun, and the head of spray gun is fixed on the solid-state of slag bath top and freezes on the slag blanket when beginning, and this solid-state slag blanket that freezes is more than 1 meter;
After step 3, the process operation of step 2, the solid-state slag blanket that freezes on slag bath top has melted liquid molten bath, add lump coal this moment, spray gun is lower inserting gradually, under the action of high-speed airflow of spray gun end, melt the molten bath that and increased gradually to whole solid-state slag blankets that freezes by the part, then melt whole solid-state slag blankets that freezes;
Step 4, the head of spray gun is immersed in the slag blanket in the operating process of step 3, Yi Bian melt the solid-state slag blanket that freezes, Yi Bian regulate the slag type, the laboratory is delivered in sampling in per 20 minutes, and constituent adjustment slag type per sample, when be melted to do not have solid-state freeze slag blanket after, open discharge outlet and discharge;
Step 5, the solid-state smelted product that freezes to produce in the process of slag blanket of fusing have smelting slag, flue gas, and wherein smelting slag is the blend melt of nickel matte and slag, contains sulfur dioxide gas in the flue gas;
Smelting slag enters the sedimentation electric furnace and realizes that the nickel slag separates, and nickel matte is through bessemerizing into high nickel matte, flue gas through the waste heat boiler waste heat recovery, gather dust after relieving haperacidity.
2. a kind of solid-state method of freezing slag blanket of smelting furnace fusing of using according to claim 1 is characterized in that: described fine coal is that raw coal is crossed through grinding of ball grinder and made.
3. a kind of smelting furnace that uses according to claim 1 melts the solid-state method of freezing slag blanket, and it is characterized in that: described oxygen is 99.9% oxygen.
4. a kind of smelting furnace that uses according to claim 1 melts the solid-state method of freezing slag blanket, and it is characterized in that: the weight of nickel accounts for 1.2% ~ 1.8% of smelting slag weight in the described smelting slag.
5. a kind of smelting furnace that uses according to claim 1 melts the solid-state method of freezing slag blanket, and it is characterized in that: the weight of copper accounts for 0.2% ~ 0.5% of smelting slag weight in the smelting slag.
6. a kind of smelting furnace that uses according to claim 1 melts the solid-state method of freezing slag blanket, and it is characterized in that: the weight of iron accounts for 33% ~ 40% of smelting slag weight in the smelting slag.
7. a kind of smelting furnace that uses according to claim 1 melts the solid-state method of freezing slag blanket, and it is characterized in that: the weight of silicon-dioxide accounts for 32% ~ 40% of smelting slag weight in the smelting slag.
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| CN2012104800562A CN102925709A (en) | 2012-11-22 | 2012-11-22 | Method for melting solid frozen slag layer by using melting furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889955A (en) * | 2016-04-20 | 2016-08-24 | 江西铜业股份有限公司 | Method for removing smoke dust sticking substance on connecting part of rising flue and waste heat boiler |
| CN111363930A (en) * | 2020-04-15 | 2020-07-03 | 云南锡业股份有限公司铜业分公司 | Method for quickly melting furnace accretion of top-blown furnace |
| CN111394596A (en) * | 2020-03-19 | 2020-07-10 | 吉林吉恩镍业股份有限公司 | Method for reducing Ausmelt furnace melt |
| CN115786728A (en) * | 2023-01-29 | 2023-03-14 | 中南大学 | Method for strengthening reduction recovery of valuable metals in high-zinc melt |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140585A (en) * | 2011-03-11 | 2011-08-03 | 吉林吉恩镍业股份有限公司 | Method for smelting nickel ore concentrate by using smelting furnace |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140585A (en) * | 2011-03-11 | 2011-08-03 | 吉林吉恩镍业股份有限公司 | Method for smelting nickel ore concentrate by using smelting furnace |
Non-Patent Citations (2)
| Title |
|---|
| 王玮等: "澳斯麦特镍精矿富氧顶吹熔池熔炼技术与实践", 《有色冶金设计与研究》, vol. 31, no. 6, 31 December 2010 (2010-12-31) * |
| 高晓艳: "吉镍澳斯麦特熔炼炉开停炉生产实践", 《有色冶金设计与研究》, vol. 31, no. 6, 31 December 2010 (2010-12-31), pages 35 - 36 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889955A (en) * | 2016-04-20 | 2016-08-24 | 江西铜业股份有限公司 | Method for removing smoke dust sticking substance on connecting part of rising flue and waste heat boiler |
| CN111394596A (en) * | 2020-03-19 | 2020-07-10 | 吉林吉恩镍业股份有限公司 | Method for reducing Ausmelt furnace melt |
| CN111363930A (en) * | 2020-04-15 | 2020-07-03 | 云南锡业股份有限公司铜业分公司 | Method for quickly melting furnace accretion of top-blown furnace |
| CN115786728A (en) * | 2023-01-29 | 2023-03-14 | 中南大学 | Method for strengthening reduction recovery of valuable metals in high-zinc melt |
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Application publication date: 20130213 |