CN105219966A - The method of the plumbous bismuth material of the two smelting furnace process height zinc of a kind of oxygen-enriched side-blowing bath - Google Patents
The method of the plumbous bismuth material of the two smelting furnace process height zinc of a kind of oxygen-enriched side-blowing bath Download PDFInfo
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- CN105219966A CN105219966A CN201510654618.4A CN201510654618A CN105219966A CN 105219966 A CN105219966 A CN 105219966A CN 201510654618 A CN201510654618 A CN 201510654618A CN 105219966 A CN105219966 A CN 105219966A
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Abstract
The present invention relates to the method for the plumbous bismuth material of the two smelting furnace process height zinc of a kind of oxygen-enriched side-blowing bath, belong to pyrometallurgical smelting production technical field.After plumbous for high zinc bismuth material is delivered to the smelting of oxidation body of heater by the present invention, the plumbous bismuth slag of liquid Zn of high temperature flows into reduction body of heater by chute, strictly controls slag input, reduction, slagging three sections of reduction processes; By strengthening coal amount, controlling oxygen quotient, building high temperature height reducing atmosphere.Zinc element is reduced into rapidly simple substance zinc in reduction furnace, and zinc boiling point 907 DEG C and furnace temperature are at 1350 DEG C, and zinc enters flue dust by high temperature steam pressure, is collected at waste heat boiler and bottom of gathering dust.Cigarette ash send zinc sulfate crystallization workshop separation of lead zinc and makes zinc product when surpassing 60% containing zinc, thus fundamentally two stoves substitute three stoves, eliminate fuming furnace, saves the cost reclaiming zinc.
Description
Technical field
The present invention relates to the method for the plumbous bismuth material of the two smelting furnace process height zinc of a kind of oxygen-enriched side-blowing bath, belong to pyrometallurgical smelting production technical field.
Background technology
The more advanced method that the plumbous bismuth material of the high zinc of current domestic process is taked is that bottom convertor+blast furnace+fuming furnace three stove Metal smelting is separated, and oxygen-enriched side-blowing oxidized still+reduction furnace+fuming furnace three combination oven method.Former approach industrial practice is ripe, but the plumbous bismuth slag of the high-temperature liquid state height zinc that can not bottom convertor be utilized very well to flow out, need to cool this part heat and add blast furnace again.In like manner cold Water Quenching Slag continues to add fuming furnace and reclaims high zinc, and this method hear rate is high, and environment is poor, and specific capacity is low.The latter's method three stove is connected, although heat utilization efficiency is high, sets up fuming furnace cost of investment high, and the fault handling of simultaneous oxidation stove and reduction furnace directly can affect the normal operation of fuming furnace.
Summary of the invention
The technical problem to be solved in the present invention is the above-mentioned shortcoming for prior art, the method of the plumbous bismuth material of the two smelting furnace process height zinc of a kind of oxygen-enriched side-blowing bath is proposed, by the oxidized still melting in the two smelting furnace of oxygen-enriched side-blowing bath, reduction furnace drastic reduction substitutes three stoves and to be connected recovery zinc, saves fuming furnace.Solve the problem that the former hear rate is high, realize the efficient synthetical recovery of valuable metal, reach the object of producing continuous high-efficient, energy efficient and reduction environmental pollution, fundamentally cost-saving.
Technical scheme of the present invention is: the method for the plumbous bismuth material of the two smelting furnace process height zinc of a kind of oxygen-enriched side-blowing bath, with the two smelting furnace of oxygen-enriched side-blowing bath be made up of oxidation body of heater and reduction body of heater two parts; After the smelting of oxidation body of heater delivered to by the plumbous bismuth material of high zinc, the plumbous bismuth slag of liquid Zn of high temperature flows into reduction body of heater by chute, and this slag is by weight percentage containing zinc 12-14%, leaded 26-28%, bismuth-containing 5-8%; Slag temperature 1100-1250 DEG C; In reduction body of heater, strictly control slag input, reduction, slagging three sections of reduction processes; The coal in each stage adds situation: slag-in section 0.7-0.8t/h, reinforced used time 20min; Reduction section 1.9-2.1t/h, reinforced used time 70min; The temperature raising period 0.7-0.8t/h of slagging section, reinforced used time 10min; Wingdale adds in slag-in section, and add-on is 0.4-0.5t/h; Return cigarette ash to add in reduction section, each add-on is 2t; Final control slag type is weight ratio FeO/SiO
2=1.6 ~ 1.7 and CaO/SiO
2=0.6 ~ 0.8; Control α crosses different three sections of drastic reduction technology: the slag-in section α realizing oxidizing semlting slag reduction process of oxygen quotient and crosses oxygen quotient 0.6, and reduction section is that α crosses oxygen quotient 0.4, and slagging section α crosses oxygen quotient 0.7; The plumbous bismuth slag of high zinc is reduced into simple substance rapidly in height reducing atmosphere, zinc boiling point 907 DEG C simultaneously, and reduces furnace temperature at 1350 DEG C, and zinc enters flue dust by high temperature steam pressure, is collected at waste heat boiler and bottom of gathering dust; Return cigarette ash to continue to add at reduction section; The further separation of lead zinc in zinc sulfate workshop is sent into when chemical examination zinc cigarette ash of sampling contains zinc more than 60%; Sulfuric acid lead skim after separation is sent oxidation body of heater back to and is prepared burden into stove, and zinc makes sulfuric acid monohydrate zinc product.
α of the present invention crosses oxygen quotient: the oxygen quality of burning 1kg fuel institute effective supply/with the theoretical oxygen mass ratio needed for perfect combustion 1kg fuel; The oxygen of such as certain mass and carbon perfect combustion are just that 1, α crosses the theoretical oxygen quality needed for oxygen quality/perfect combustion 1kg fuel that oxygen quotient 0.7 is just expressed as 1kg carbon institute effective supply of burning and equals 0.7.
Key point of the present invention utilizes in oxygen enrichment both side-blown bath smelting furnace to be oxidized warm sludge and reduction furnace three sections of degree of depth increasing reduction techniques, by strengthening coal amount, controlling oxygen quotient, and building high temperature height reducing atmosphere.Zinc element is reduced into rapidly simple substance zinc in reduction furnace, and zinc boiling point 907 DEG C and furnace temperature are at 1350 DEG C, and zinc enters flue dust by high temperature steam pressure, is collected at waste heat boiler and bottom of gathering dust.Cigarette ash send zinc sulfate crystallization workshop separation of lead zinc and makes zinc product when surpassing 60% containing zinc, thus fundamentally two stoves substitute three stoves, eliminate fuming furnace, saves the cost reclaiming zinc.
Compared with the prior art: the present invention adopts the plumbous bismuth material of oxygen-enriched side-blowing duplex furnace process height zinc, namely the advantage of high-temperature liquid state heat is utilized, the feature simultaneously utilizing duplex to blow side changes process system, direct cancellation fuming furnace equipment, 93% Zn dust is collected at waste heat boiler and bottom of gathering dust, be sent to wet method zinc sulfate crystallization workshop, further separation of lead, zinc element, the sulfuric acid lead skim after separation sends side-blown oxidized still back to.This Apparatus and method for is easy and simple to handle, and environment is good, and two stoves replace three stoves, energy efficient, reduces production cost.Meet current national resources conservation, eco-friendly industry policy, meet the industrial adjustment planning of current non-ferrous metal, be conducive to solving the imbalance between economic growth and ecotope, be conducive to the technical progress promoting smelting field of nonferrous metal.
Accompanying drawing explanation
Fig. 1 is the two smelting furnace structural representation of oxygen-enriched side-blowing bath of the present invention.
Wherein, 1 oxidation body of heater; 2 reduction bodies of heater; 3,3 ' furnace foundation; 4,4 ' cupola well; 5,5 ' tuyere; The opening for feed of 6 oxidation oven body part; The throat-fed mouth of 6 ' reduction oven body part; The discharge port of 7 oxidation oven body part; The discharge port of 7 ' reduction oven body part; 8,8 ' floss hole; 9,9 ' safe mouth; 10 chutes; 11 dry slag mouths.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
A method for the plumbous bismuth material of the two smelting furnace process height zinc of oxygen-enriched side-blowing bath, the two smelting furnace of its oxygen-enriched side-blowing bath, is divided into oxidation body of heater (1) and reduction body of heater (2) two parts; Two bodies of heater are provided with independently furnace foundation (3,3 '), cupola well (4,4 '), water jacket, tuyere (5,5 '), siphon port, opening for feed (6,6 '), discharge port (7,7 ') and floss hole (8,8 '); In two bodies of heater, the lowest part of cupola well (4,4 ') is also equipped with safe mouth (9,9 '), for emptying body of heater material during blowing out so that maintenance; Furnace foundation (3,3 ') the fundamental plane installation position of oxidation body of heater (1) part is higher than furnace foundation (3, the 3 ') fundamental plane of reduction body of heater (2) part, the discharge port (7) of oxidation oven body part has chute (10) to be connected with between the opening for feed (6 ') of reduction oven body part, is used for the high zinc plumbous bismuth slag melt after oxidized still internal oxidition to enter reduction furnace reduction by chute; Dry slag mouth (11) is provided with, in case furnace accretion at the outer side of oxidation body of heater (1) part cupola well (4); Described water jacket is copper water jacket; Described tuyere is provided with a tuyere and secondary tuyere, to make reaction more abundant; Described reduction body of heater (2) floss hole (8 ') connects waste heat boiler and dust-precipitator successively by fume ducts.
The present invention smelts the plumbous bismuth material of alleged high zinc, and main component (weight percent) content is as table 1;
Table 1
| Zn | Pb | Bi | S | SiO 2 | Fe | Cao | Cu |
| 14-16 | 30-35 | 12-15 | 16.5 | 8.4 | 10.6 | 3.6 | 2 |
After oxidation body of heater (1) smelting delivered to by the plumbous bismuth material of high zinc, the plumbous bismuth slag of liquid Zn of high temperature flows into reduction body of heater (2) by chute, and this slag is by weight percentage containing zinc 12-14%, leaded 26-28%, bismuth-containing 5-8%; Slag temperature 1100-1250 DEG C; In reduction body of heater (2), strictly control slag input, reduction, slagging three sections of reduction processes; The coal in each stage adds situation: slag-in section 0.7-0.8t/h, reinforced used time 20min; Reduction section 1.9-2.1t/h, reinforced used time 70min; The temperature raising period 0.7-0.8t/h of slagging section, reinforced used time 10min; Wingdale adds in slag-in section, and add-on is 0.4-0.5t/h; Return cigarette ash to add in reduction section, each add-on is 2t; Final control slag type is weight ratio FeO/SiO
2=1.6 ~ 1.7 and CaO/SiO
2=0.6 ~ 0.8; Control α crosses different three sections of drastic reduction technology: the slag-in section α realizing oxidizing semlting slag reduction process of oxygen quotient and crosses oxygen quotient 0.6, and reduction section is that α crosses oxygen quotient 0.4, and slagging section α crosses oxygen quotient 0.7;
The plumbous bismuth slag of high zinc is reduced into simple substance rapidly in height reducing atmosphere, zinc boiling point 907 DEG C simultaneously, and reduces furnace temperature at 1350 DEG C, and zinc enters flue dust by high temperature steam pressure, is collected at waste heat boiler and bottom of gathering dust; Return cigarette ash to continue to add at reduction section; The further separation of lead zinc in zinc sulfate workshop is sent into when chemical examination zinc cigarette ash of sampling contains zinc more than 60%; Sulfuric acid lead skim after separation is sent oxidation body of heater (1) back to and is prepared burden into stove, and zinc makes sulfuric acid monohydrate zinc product.
The efficient reduction that oxygen quotient difference realizes oxidizing semlting slag is crossed by controlling three sections of α.After adopting this new technology, retailoring process is made to be convenient to effective control, plumbous and zinc recovery is high, in slag, zinc volatilization enters fume amount and increases considerably, retailoring slag main component is in table 2, and as can be seen from Table 2, after reduction, in slag, lead content is 0.53%-0.68%, and tradition remains between 1 ~ 3% unlike Zn content, reach plumbous drastic reduction and enter lead bismuth alloy and zinc and stay dual purpose in flue dust.
Table 2 retailoring slag main component/%
| Slag type | Pb | Zn | FeO | CaO | SiO 2 |
| Slag-in section smelting slag | 0.59 | 1.2 | 30.01 | 12.38 | 18.27 |
| Reduction section smelting slag | 0.68 | 1.5 | 31.47 | 14.35 | 19.37 |
| Slagging section smelting slag | 0.53 | 2.2 | 34.24 | 12.26 | 20.15 |
Claims (3)
1., by a method for the plumbous bismuth material of the two smelting furnace process height zinc of oxygen-enriched side-blowing bath, use the two smelting furnace of oxygen-enriched side-blowing bath be made up of oxidation body of heater (1) and reduction body of heater (2) two parts; It is characterized in that: after oxidation body of heater (1) smelting delivered to by the plumbous bismuth material of high zinc, the plumbous bismuth slag of liquid Zn of high temperature flows into reduction body of heater (2) by chute, and this slag is by weight percentage containing zinc 12-14%, leaded 26-28%, bismuth-containing 5-8%; Slag temperature 1100-1250 DEG C; In reduction body of heater (2), strictly control slag input, reduction, slagging three sections of reduction processes; The coal in each stage adds situation: slag-in section 0.7-0.8t/h, reinforced used time 20min; Reduction section 1.9-2.1t/h, reinforced used time 70min; The temperature raising period 0.7-0.8t/h of slagging section, reinforced used time 10min; Wingdale adds in slag-in section, and add-on is 0.4-0.5t/h; Return cigarette ash to add in reduction section, each add-on is 2t; Final control slag type is weight ratio FeO/SiO
2=1.6 ~ 1.7 and CaO/SiO
2=0.6 ~ 0.8; Control α crosses different three sections of drastic reduction technology: the slag-in section α realizing oxidizing semlting slag reduction process of oxygen quotient and crosses oxygen quotient 0.6, and reduction section is that α crosses oxygen quotient 0.4, and slagging section α crosses oxygen quotient 0.7; The plumbous bismuth slag of high zinc is reduced into simple substance rapidly in height reducing atmosphere, zinc boiling point 907 DEG C simultaneously, and reduces furnace temperature at 1350 DEG C, and zinc enters flue dust by high temperature steam pressure, is collected at waste heat boiler and bottom of gathering dust; Return cigarette ash to continue to add at reduction section; The further separation of lead zinc in zinc sulfate workshop is sent into when chemical examination zinc cigarette ash of sampling contains zinc more than 60%; Sulfuric acid lead skim after separation is sent oxidation body of heater (1) back to and is prepared burden into stove, and zinc makes sulfuric acid monohydrate zinc product.
2. the method for the plumbous bismuth material of the two smelting furnace process height zinc of a kind of oxygen-enriched side-blowing bath according to claim 1, is further characterized in that: the two smelting furnace of its oxygen-enriched side-blowing bath described, is divided into oxidation body of heater (1) and reduction body of heater (2) two parts; Two bodies of heater are provided with independently furnace foundation (3,3 '), cupola well (4,4 '), water jacket, tuyere (5,5 '), siphon port, opening for feed (6,6 '), discharge port (7,7 ') and floss hole (8,8 '); In two bodies of heater, the lowest part of cupola well (4,4 ') is also equipped with safe mouth (9,9 '), for emptying body of heater material during blowing out so that maintenance; Furnace foundation (3,3 ') the fundamental plane installation position of oxidation body of heater (1) part is higher than furnace foundation (3, the 3 ') fundamental plane of reduction body of heater (2) part, the discharge port (7) of oxidation oven body part has chute (10) to be connected with between the opening for feed (6 ') of reduction oven body part, is used for the high zinc plumbous bismuth slag melt after oxidized still internal oxidition to enter reduction furnace reduction by chute; Dry slag mouth (11) is provided with, in case furnace accretion at the outer side of oxidation body of heater (1) part cupola well (4); Described water jacket is copper water jacket; Described tuyere is provided with a tuyere and secondary tuyere, to make reaction more abundant; Described reduction body of heater (2) floss hole (8 ') connects waste heat boiler and dust-precipitator successively by fume ducts.
3. the method for the plumbous bismuth material of the two smelting furnace process height zinc of a kind of oxygen-enriched side-blowing bath according to claim 1, is characterized in that: the plumbous bismuth material of described high zinc, Contents of Main Components is as following table
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796875A (en) * | 2012-08-07 | 2012-11-28 | 中国恩菲工程技术有限公司 | Zinc leaching slag treatment device and treatment process |
| CN203382810U (en) * | 2013-03-25 | 2014-01-08 | 湖南金旺铋业股份有限公司 | Oxygen-rich oxidation-reduction furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796875A (en) * | 2012-08-07 | 2012-11-28 | 中国恩菲工程技术有限公司 | Zinc leaching slag treatment device and treatment process |
| CN203382810U (en) * | 2013-03-25 | 2014-01-08 | 湖南金旺铋业股份有限公司 | Oxygen-rich oxidation-reduction furnace |
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Application publication date: 20160106 |