CN101519734A - Oxygen-blowing matte making polymetallic catch process - Google Patents

Abstract

The invention provides an oxygen-blowing matte making polymetallic catch process, which comprises that: mixed ore concentrate, quartz, return materials and the like are blended, oxygen and air are injected into a molten pool by a supersonic oxygen lance from the bottom of a furnace, the volume ratio of the air to the oxygen is 0.5 to 0.6, the pressure of the air is 0.4 to 0.7MPa, the temperature of the molten pool is between 1,200 and 1,250 DEG C, and the mixed oxygen-enriched air and charging materials are subjected to chemical reaction to generate gold-containing copper matte and furnace slag; the gold-containing copper matte is delivered to a P-S converter to be blown, the generated gold-containing crude copper is delivered to an anode fixed flame furnace to be refined, the refined and purified gold-containing copper liquor is cast into an anode plate on a disc casting machine, the anode plate is subjected to an electrolytic process to be refined by a wet method to generate high-purity cathode copper and anode mud, and the cathode copper is delivered to a deep processing workshop to be continuously processed; and molten and blown furnace slag are delivered to a slow cooling slag site to be cooled and then delivered for ore dressing. The process has the advantages of simple material preparation, stable work, strong catch capability for metal elements, wide application range for raw materials, and the like.

Description

Oxygen-blowing matte making polymetallic catch process

Technical field:

The invention belongs to the nonferrous metallurgy field, relate to a kind of polymetallic ore valuable element and comprehensively capture Technology.

Background technology:

At present, there are a large amount of many metals associated minerals in China and surrounding countries, contain uytenbogaardtite, block crop type gold mine and complicated unmanageable multielement mineral intergrowth.These ore deposits are after ore dressing, can obtain gold ore, silver preparation concentrate or copper ore concentrates, these concentrate have a common characteristic, contain multiple valuable elements such as Au, Ag, Cu, S, As, Sb, Bi, Se, Zn, Pb, Fe, Co, Ni exactly, and prior art does not still merge the ripe advanced technologies of handling to such many metal concentrates both at home and abroad.Adopt the method for " fluidized bed roasting+cyaniding " or " pressurised oxygen is soaked+cyaniding " or " bacterium leaching+cyaniding " to handle for the gold and silver concentrate prior art more, wherein using more is " fluidized bed roasting+cyaniding " technology, earlier with two sections boiling roasters, remove As, Cu, S respectively, then leach gold and silver by cyaniding, the rate of recovery of gold is only between 82-95%, the rate of recovery of silver only is 50%-70%, other valuable elements that contain in the concentrate can not get good recycling mostly, cause the wasting of resources.The above-mentioned processing method not only rate of recovery of valuable metal is low, and all causes the hazardous and noxious substances discharging in process of production, and the use of especially hypertoxic prussiate, management and qualified discharge problem can't thoroughly solve so far.And for copper ore concentrates, the present state of the art is that the large-lot producer of minority adopts the external melting technology of introducing, as the flash smelting of your smelting, the Rouyn-Noranda in Daye, the Ai Safa of cloud copper etc., most SMEs still generally adopts and is about to superseded blast furnace smelting process.External these Technologies of introducing are relatively poor to the adaptability of raw material, particularly low-grade multi-metal complex mineral aggregate more is difficult to adapt to, and technical qualification such as material composition, humidity, granularity are had relatively high expectations, as the flash smelting technical requirements go into the stove furnace charge contain that copper grade can not be lower than 15%, moisture content is strict controlled in below 0.3%, below granularity 200 orders, therefore the raw material processing cost increases, and introduction of foreign technology also needs to spend high patent fee.And Technology of the present invention is extremely strong to the adaptability of raw material, goes into that the stove mineral aggregate contains that copper grade only needs greater than 6%, moisture content only needs less than 8%, granularity does not more have harsh requirement, and original ore powder need not processing and can use.So the present invention can save that raw material grinds, dehumidification system and transfer of technology expense, investment is saved in easy operation, reduces cost.And the blast furnace smelting process that falls behind, because of energy consumption height, the environmental protection rate of recovery poor, valuable metal are low, country classifies these technologies and equipment as the striking out that faces out of category.According to statistics, China's non-ferrous metal industry approximately also has 900,000 t/a to adopt the production capacity of blast furnace smelting process to demand urgently transforming at present.

Summary of the invention

The object of the present invention is to provide a kind of polymetallic ore valuable element comprehensively to capture Technology.

The technical solution adopted in the present invention is:

1, its flow process of oxygen-blowing matte making polymetallic catch process is:

1) with materials such as concentrate, slag concentrate, flue dust, grab with bridge grabbing crane and to join, grab the collective concentrate for preparing and put into feed bin, the batching factory building that is sent to smelting furnace with endless belt conveyor stores, melting need with quartzite, returning charge etc. also grab into feed bin with bridge grabbing crane, the batching factory building that is sent to smelting furnace with endless belt conveyor stores;

2) collective concentrate, quartzite, returning charge etc. are prepared burden, and according to the feed rate of setting with compound in endless belt conveyor adds the molten bath of smelting furnace;

3) with oxygen and air, to inject in the molten bath through supersonic speed oxygen rifle from the stove bottom, the volume ratio of air and oxygen is 0.5-0.6, air pressure is 0.4-0.7MPa, bath temperature is 1200-1250 ℃, mixed oxygen-rich air and furnace charge generation chemical reaction, and output contains golden copper matte regulus and slag;

4) containing golden copper matte regulus send P-S to bessemerize, the golden blister copper that contains that generates send the refining of anode fixation reflex stove, the golden copper liquid that contains after refining is purified pours into positive plate on the disk casting molding machine, positive plate send electrowinning process to carry out wet-process refining again, the output Cu-CATH-1 and the anode sludge, cathode copper are sent to the deep processing workshop to be continued;

5) send the slag ore dressing again after melting and blowing slag send the cooling of slow cooling slag field, melting and blowing flue gas (120-130 ℃) produce the saturation steam of 4.0MPa through the waste heat boiler recovery waste heat, deliver to the generating of cogeneration station, after entering electric dust cleaning, the blowing flue gas after the waste heat boiler cooling directly goes relieving haperacidity, the melting flue gas enters the quench tower cooling again after electricity gathers dust, the flue gas after the cooling enters the cloth bag chamber and is sent to relieving haperacidity behind the dust cleaning once more.

Oxygen-blowing matte making polymetallic catch process technology of the present invention, compared with prior art Tu Chu advantage is:

It is simple to get the raw materials ready, operation is stable, trapping ability to metallic element is strong, and is wide to the adaptability scope of raw material, can both utilize congruent melting of the present invention to capture or volatilization captures as the higher gold and silver concentrate of sulfur-bearing, polymetallic ore that cupric is lower, the complicated refractory ore of multielement symbiosis etc.;

When melting, can regulate and control the oxygen gesture of melt different layers position (as sulfonium layer, mixolimnion, slag blanket etc.) flexibly than prior art, effectively control bath temperature, elements such as the lead in the concentrate, zinc, arsenic, antimony, bismuth more can fully be volatilized and be enriched in the flue dust, and the recovery rate of valuable metals that can solve in the prior art multi-metal complex ore deposit through wet processing is hanged down even not recoverable technical barrier again;

Because the high pattern that forms of oxygen bottom blowing gas velocity is the top blast stove and the side-blown converter of impulse form compared to prior art, bubble diameter is little, the dispersity height, Gu gas--liquid--contacts area between three-phase big, heat and mass is good, the zone that material stirs in the molten bath is wide, evenly, no dead angle, the sufficient reacting fierceness, speed is fast, smelting intensity is high;

Oxygen concentration height (can reach more than 70% noranda furnace about 40% of prior art), the unit time heat of reaction is big, and the air capacity that enters in the stove is few, and the melting exhaust gas volumn is low, the less calories of taking away.Because of technology total system negative-pressure operation of the present invention, no flue dust is revealed again, and the heat lost by radiation of equivalent melting body of heater is minimum.So can be completely achieved pyritic smelting, therefore can effectively solve the difficult problem of prior art energy consumption height, environmental protection difference;

Oxygen has been avoided the peroxidation of iron in the slag, Fe in the slag by the sulfonium transmission ₃O ₄Content significantly reduces (prior art Rouyn-Noranda slag Fe than prior art ₃O ₄Content is about 15%, and bottom convertor slag Fe of the present invention ₃O ₄Content only is about 3%), therefore, technology of the present invention can adopt high iron silicon ratio slag type (the Ao Simaite stove slag Fe/SiO of prior art ₂1.1-1.3, flash stove smelting slag is 1.48-1.65, and the present invention is 1.6-1.9), can effectively reduce the smelting slag rate than prior art, improve the rate of recovery of valuable metals such as gold and silver, copper, and slag easily is fit to ore dressing to be handled, and the raw material comprehensive utilization of mine tailing making cement factory realizes no waste sludge discharge, promptly clean and environmental protection, realized the comprehensive utilization of resource.

Fe in the smelting slag ₃O ₄Composition is low, and the viscosity of slag is little, good fluidity, thus solved a difficult problem of amassing the iron dross in the prior art molten bath easily, significantly reduced the blowing out clearing times, promptly reduced labour intensity, improved labour productivity again.

Description of drawings:

Fig. 1 is a process flow sheet of the present invention.

Embodiment:

Sketch technical process of the present invention below in conjunction with accompanying drawing

The embodiment of the invention mainly comprises following three aspects, and particular content sees table one, table two and table three for details.

Table one: raw material is formed

Table two: technical qualification

Table three: technical indicator

Claims (1)

1, oxygen-blowing matte making polymetallic catch process is characterized in that:

1) with materials such as concentrate, slag concentrate, flue dust, grab with bridge grabbing crane and to join, grab the collective concentrate for preparing and put into feed bin, the batching factory building that is sent to smelting furnace with endless belt conveyor stores, melting need with quartzite, returning charge etc. also grab into feed bin with bridge grabbing crane, the batching factory building that is sent to smelting furnace with endless belt conveyor stores;

2) collective concentrate, quartzite, returning charge etc. are prepared burden, and according to the feed rate of setting with compound in endless belt conveyor adds the molten bath of smelting furnace;

3) with oxygen and air, to inject in the molten bath through supersonic speed oxygen rifle from the stove bottom, the volume ratio of air and oxygen is 0.5-0.6, air pressure is 0.4-0.7MPa, bath temperature is 1200-1250 ℃, mixed oxygen-rich air and furnace charge generation chemical reaction, and output contains golden copper matte regulus and slag;

4) containing golden copper matte regulus send P-S to bessemerize, the golden blister copper that contains that generates send the refining of anode fixation reflex stove, the golden copper liquid that contains after refining is purified pours into positive plate on the disk casting molding machine, positive plate send electrowinning process to carry out wet-process refining again, the output Cu-CATH-1 and the anode sludge, cathode copper are sent to the deep processing workshop to be continued;

5) send the slag ore dressing again after melting and blowing slag send the cooling of slow cooling slag field, melting and blowing flue gas (120-130 ℃) produce the saturation steam of 4.0MPa through the waste heat boiler recovery waste heat, deliver to the generating of cogeneration station, after entering electric dust cleaning, the blowing flue gas after the waste heat boiler cooling directly goes relieving haperacidity, the melting flue gas enters the quench tower cooling again after electricity gathers dust, the flue gas after the cooling enters the cloth bag chamber and is sent to relieving haperacidity behind the dust cleaning once more.

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