CN1455010A

CN1455010A - Antimony fused-extracting refining lead-removing agent

Info

Publication number: CN1455010A
Application number: CN 02114111
Authority: CN
Inventors: 张晓岚; 张涛; 张弛
Original assignee: 张晓岚
Priority date: 2002-04-29
Filing date: 2002-04-29
Publication date: 2003-11-12

Abstract

The composition of melt extraction refining lead-removing agent for pyrosmelting antimony comprises (wt%) 30-70% of extracting agent, 0-2% of extraction adjuvant and 30-50% of flux, in which in the extracting agent Sb2O3 content is 10-60%, P2O2 content is 20-60% and the rest is H2O, the extraction adjuvant is Sb2S3 and the flux is one of carbonate, sulfate, phosphate, hydrochloride and borate of potassium or sodium or combination of more than two kinds of them. Said invention not only can obtain the lead-reducing effect, but also can remove other impurities of iron, copper, tin and bismuth, etc. and can raise antimony direct yield and its working efficiency.

Description

A kind of fused-extracting refining lead-removing agent of antimony

The subsidiary material that a kind of needle antimony pyrorefining of technical field is used, remove the auxiliary agent that bismuth is used at particularly a kind of deleading, deironing, detin, copper removal.

The needle antimony fire refining deleading method that background technology is traditional is to allow the voloxidation of base metal antimony become ANTIMONY TRIOXIDE SB 203 99.8 PCT, restores refining, and impurity lead is enrichment in residual melt then.This method technical process is long, the smelting cost height, and can't thoroughly remove the lead of low levels.94111122.9 number patent has proposed " a kind of antimony remove lead rifining method ", though can solve the difficult problem of removal low levels lead, this method employing be the ammonium salt deleading agent, have following defective:

1, contaminate environment.

Because ammonium salt at high temperature very easily decomposes, and emits a large amount of ammonias and water vapor, Dark smoke billows near making the working district, and the smell is awful, has a strong impact on people's orthobiosis and work, causes environmental damage.

2, influence the antimony metal direct yield, production cost is raise.

Though the ammonium salt deleading agent can make lead remove more up hill and dale, but in the deleading operation, particularly remove in the process of low levels lead, still contain a large amount of antimony in generation lead slag-removed, antimony content accounts for more than 40% of slag total amount, makes the antimony metal direct yield reduce by 1～3 percentage point.

3, make the interior temperature fluctuation of stove big, influence the working of a furnace and normal safety operation.

Because of ammonium salt absorbs a large amount of heats when the pyrolytic decomposition, often make that temperature reduces suddenly in the stove, if misoperation is easy to make in the stove antimony liquid partly to freeze or whole stove freezes.In case freeze stove, prolong tap to tap time, and the deleading poor effect.In addition, ammonium salt will be emitted a large amount of ammonias and water vapor when decomposing, and influence exhausting system and flour bag dust collecting system, if at this moment deleading agent enters antimony liquid inside and might blast, fryer once takes place and wound workman's security incident.Because this defective is arranged, so ammonia salt deleading agent can not be directly used in deleading in the stibium trioxide furnace bottom water antimony, and promptly range of application is restricted.

Traditional antimony refining deironing is to adopt condensation method to remove high-load iron; Adopt in antimony liquid, to add antimony sulfide or additives such as sodium sulphate or weisspiessglanz, add the yellow soda ash slag making and remove

The iron of low levels.Copper removal is to adopt antimony sulfide with the method for yellow soda ash or salt slag making copper antimony to be separated.And when containing a spot of tin, bismuth impurity in the antimony, still do not have effective means and remove.Moreover deironing, copper removal are the substep operations, and separate operaton can not carry out simultaneously, therefore prolongs tap to tap time, reduces the direct yield of antimony, increases production cost.

Summary of the invention the purpose of this invention is to provide a kind of fused-extracting refining lead-removing agent of antimony, it is free from environmental pollution to accomplish to adopt it to carry out in the process of fire refining of antimony, reduce the antimony content in lead slag-removed, improve the antimony metal direct yield, the interior temperature fluctuation of stove is little, does not influence the working of a furnace, be convenient to safety operation, in falling plumbous process, remove de-iron, copper, tin, bismuth impurity simultaneously, shorten the heat, increase work efficiency.

Technical scheme is according to the fused-extracting refining principle, adopts a kind of deleading agent that does not have ammonium salt flux.The weight percent of this deleading agent each component is extraction agent 30～70%, synergist 0～20%, flux 30～50%, wherein Sb in the extraction agent ₂O ₃Content 10～60%, P ₂O ₅Content 20～60%, all the other are H ₂O, synergist are Sb ₂S ₃, flux is one or two or more kinds the cooperation in the carbonate, vitriol, phosphoric acid salt, hydrochloride, borate of potassium or sodium.

Because above-mentioned flux fusing point is moderate, it is 400 ℃～900 ℃, and can bigger solubleness be arranged to the resultant of impurity and extraction agent, synergist reaction, and the less antimony slag of being convenient to of the slag phase density that forms separates, therefore one of characteristics of the present invention are that deleading is effective, can remove de-iron, copper, tin, bismuth impurity simultaneously, reduce the antimony content in lead slag-removed, improve the direct yield and the working efficiency of antimony, reduce production costs.Because this solvent viscosity is little, high temperatures does not decompose, and therefore two of characteristics of the present invention is that no toxic and harmful is emitted, generation lead slag-removed also nontoxic, free from environmental pollution.In addition, temperature fluctuation is little in the stove in smelting process, the protection of the favourable working of a furnace, and therefore three of characteristics of the present invention is simple to operate, safe and reliable, can directly apply to deleading, the copper removal of stibium trioxide furnace bottom water antimony.

Embodiment

Embodiment one: the weight percent of fused-extracting refining lead-removing agent is extraction agent 30%, synergist Sb ₂S ₂Be 20%, solvent NaH ₂PO ₄Be 50%, Sb in the extraction agent wherein ₂O ₃Content 40%, P ₂O ₅Content 45%, all the other are H ₂O.Needle antimony 100g with this deleading agent 20g processing Pb content 3.15%, Cu content 0.42% keeps reaction 45 minutes under 800 ℃ of temperature, Pb content is 0.14% in the gained star metal, and Cu content is 0.08%.

Embodiment two: the weight percent of fused-extracting refining lead-removing agent is that extraction agent 70%, flux NaCL are 30%, wherein Sb in the extraction agent ₂O ₃Content 10%, P ₂O ₅Content 60%, all the other are H ₂O.Needle antimony 100g with this deleading agent 20g processing Pb content 4.10%, Fe content 8.60%, Sn content 1.10% keeps reaction 1 hour, Pb content 0.09%, Fe content 0.005%, Sn content 0.003% in the gained star metal under 850 ℃ of temperature.

Embodiment three: the weight percent of fused-extracting refining lead-removing agent is extraction agent 60%, synergist Sb ₂S ₃Be 10%, flux Na ₂CO ₃Be 30%, Sb in the extraction agent wherein ₂O ₃Content 50%, P ₂O ₅Content 20%, all the other are H ₂O.In the present embodiment, solvent Na ₂CO ₃Available K ₂CO ₃Replace.Handle Pb content 1.50%, Cu content 0.22% with this deleading agent 15g, the needle antimony 100g of Bi content 0.043% keeps reaction 70 minutes, Pb content 0.03%, Cu content 0.013%, Bi content 0.0092% in the gained star metal under 850 ℃ temperature.

Embodiment four: use the deleading agent 50kg identical with example three directly to drop into 2M ²In the small-sized reverberatory furnace formula stibium trioxide stove, handle the end water antimony 1500kg of Pb content 3.35%, Cu content 0.56%, keep reaction 120 minutes under 950 ℃ of temperature, crystal's antimony result of laboratory test is a Pb content 0.12% at the bottom of the gained, Cu content 0.15%.

Embodiment five: except flux by 10% Na ₂CO ₃, 20% K ₂SO ₄Outside the composition, the proportioning of deleading agent is identical with example three.

Embodiment six: except flux by 10% KH ₂PO ₄, 20% KCL, 10%K ₂CO ₃Outside the composition, the proportioning of deleading agent is identical with example three.

Claims

1, a kind of fused-extracting refining lead-removing agent of antimony, the weight percent that it is characterized in that each component are extraction agent 30～70%, synergist 0～20%, flux 30～50%, wherein Sb in the extraction agent ₂O ₃Content 10～60%, P ₂O ₅Content 20～60%, all the other are H ₂O, synergist are Sb ₂S ₃, flux is one or two or more kinds the cooperation in the carbonate, vitriol, phosphoric acid salt, hydrochloride, borate of potassium or sodium.