CN1974791A

CN1974791A - Production process of extracting zinc oxide and pig iron from cinder and slag containing Zn, Fe and P6

Info

Publication number: CN1974791A
Application number: CNA200610037320XA
Authority: CN
Inventors: 冯碧朗
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-08-28
Filing date: 2006-08-28
Publication date: 2007-06-06
Anticipated expiration: 2026-08-28
Also published as: CN100503841C

Abstract

The present invention is production process of producing zinc oxide and pig iron with cinder and slag containing Zn, Fe and Pb. The process includes the following steps: extracting zinc metal with the waste in a rotary kiln and sintering the iron smelting material simultaneously through maintaining the roasting oxidation course, utilizing the cooling separation system and collector to make the system in low resistance state and ensuring the standard reaching exhaust; and smelting in a blast furnace to produce pig iron and water granulated slag. The present invention has high energy source utilizing rate, environment friendship and high production efficiency.

Description

Utilize the production method of cinder and slag containing Zn, Fe and Pb, abandoned mine extracting zinc oxide and the pig iron

Technical field

The present invention relates to the production method of the zinc oxide and the pig iron, more particularly relate to a kind of production method of utilizing cinder and slag containing Zn, Fe and Pb, mine containing Zn, Fe and Pb extracting zinc oxide and the pig iron.

Background technology

In recent years, along with the Chinese national economy rapid growth, zinc and iron resources demand breach are very big, and scales such as China's Electric furnace steel making, blast furnace ironmaking, smelting industry refinement heavy metal are very huge, produce the useless lime-ash of a large amount of industry, and contain important meals such as a spot of zinc, iron, lead in the useless lime-ash of these industry, wherein Zn (8-15%), Fe (25-35%), Pb (0-3%), directly they are discharged in the environment, can cause the waste once more and the environmental pollution of the energy, resource.Show according to data, handle this type of and contain the useless lime-ash of zinc-iron plumbing and reclaim valuable metal regenerations such as its zinc, iron, lead, have only small part country that running is arranged in the world, but they are the ferrous metals of handling in the waste residue, smelt and reclaim the pig iron.Metal such as zinc, lead can not be recycled simultaneously, and production technique is single, finally produces waste residue and topples over or arbitrarily abandon to environment, causes a large amount of energy, the wasting of resources and environmental pollution, and harm society because of operating cost height, benefit are low, is in the trend of loss of capital substantially.And at home, have indivedual small business to adopt general this type of waste residue of pyrogenic process kiln art breading, abandoned mine, and with conventional treatment process zinc is put forward, consuming a large amount of energy, cost is quite high, and extraction yield is low, is in the loss of capital state.And ferrous grade is low and influence is smelted in the reason that the influences above-mentioned technology useless lime-ash that is these, cause cost height, benefit low, the metallic zinc equal size is higher again concerning steelmaking furnace, zinc, lead are harmful elements, it is unfavorable to the life-span of blast furnace directly to enter the sintering process smelting pig iron, and increased energy consumption, that is to say that another kind of element all can have a negative impact to the metal that will reclaim in reclaiming any elementary process.So these contain the useless lime-ash of zinc-iron plumbing and abandoned mine should not directly enter the sintering process processing, have only under given conditions, adopting advanced production technique and advanced production unit that metallic zinc, iron, lead are extracted simultaneously just has certain economic and social value.

Summary of the invention

Purpose of the present invention is exactly provide for the deficiency that solves prior art a kind of not only energy-efficient, and the high-quality production method of utilizing cinder and slag containing Zn, Fe and Pb, mine containing Zn, Fe and Pb while extracting zinc oxide and the pig iron of environmental protection.

Technical scheme of the present invention is as follows: a kind of production method of utilizing cinder and slag containing Zn, Fe and Pb, mine containing Zn, Fe and Pb extracting zinc oxide and the pig iron, and the preparation process step is as follows:

(1) useless lime-ash, the mine containing Zn, Fe and Pb that will contain zinc-iron lead cooperates according to a certain percentage with anthracite, adds suitable moisture, enters high-temperature roasting oxidation in the kiln through the rotary kiln feeding system; Be cooled to gathering system by kiln tail cooling system and generate product zinc oxide, tail gas qualified discharge;

(2) the plumbous agglomerate of the iron content of kiln hood discharge cooperates by a certain percentage with coke, enters the blast furnace pyrotic smelting through feeding system, generates the product pig iron and grain slag and metallic lead;

(3) high furnace exhaust gas is purified collection and treatment, the powder that produces in the tail gas clean-up process is a product zinc oxide;

(4) produce the generating of steam steam supply turbine with making fuel to boiler behind the part blast furnace tail gas clean-up that produces in above-mentioned (2), another part tail gas is heated through hotblast stove increases heat energy for blast furnace.

Described high furnace exhaust gas is a high-concentration carbon monoxide, and the powder that produces after purifying is the zinc oxide that contains 50%-90%, pig iron content 95%～98%.

The waste water that described preparation process produces does not externally discharge by the recycle of water treatment production system.

The beneficial effect that the present invention adopts above-mentioned technical solution to reach is: the present invention is with the zinc that contains of every profession and trade generation, iron, useless lime-ash of plumbing and mine containing Zn, Fe and Pb are main production raw material, with anthracite, coke is a fuel, with rotary kiln, blast furnace is that main production equipments is carried out harmless treatment and comprehensive utilization, pyrogenic attack technology with a kind of advanced person solves extracting zinc simultaneously, iron, plumbous production technique, overcome traditional zinc, the idea that iron can not refine simultaneously, and the production terminal thoroughly digests industrial residue and abandoned mine, no waste residue produces, non-wastewater discharge, do not produce secondary pollution, promote the closed type benign cycle of the multistage resource utilization and the resource of refuse, improve the level of resources utilization, develop a circular economy, and effectively solve its contaminate environment, endanger a social difficult problem.

Description of drawings

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

Embodiment

As shown in Figure 1, a kind of production method of utilizing cinder and slag containing Zn, Fe and Pb, mine containing Zn, Fe and Pb extracting zinc oxide and the pig iron of the present invention, adopt advanced pyrogenic attack technology and advanced production unit, with rotary kiln the zinc metal smelting in cinder and slag containing Zn, Fe and Pb, the mine containing Zn, Fe and Pb is come out earlier, keep the roasting oxidation reaction process, greatly reduce the consumption of its energy, utilize cooling separation and collector, make system can be in the low resistance state for a long time, the aiutage smoke dust discharge concentration is lower than 50mg/m ³Qualified discharge, and in the extracting zinc metal sintered iron, form the iron content sintered material, and contain iron and a spot of lead more than 50% in the sintered material, elements such as carbon, utilize these sintered materials as main raw material, other adds the small amounts of iron ore and a certain proportion of coke drops into the blast-furnace roasting refinement pig iron, the high furnace exhaust gas of part returns blast-furnace roasting after the hotblast stove heating, increase the heat energy of blast furnace, reduce the blast furnace energy consumption, another part schedules to last after purifying and generates electricity as boiler oil burning generation steam steam supply turbine, the brownout spending, and described high furnace exhaust gas is a carbon monoxide, the powder that produces after purifying is the zinc oxide that contains 50%-90%, pig iron metal Ferrum content 95%～98% utilizes the water treatment production system to water coolant and sanitary wastewater recycle, effectively the conserve water resource, environment is not produced pollution, realize industry " three wastes zero " emission request.

The invention solves the viewpoint that the traditional zinc oxide and the pig iron can not refine simultaneously, whole technological process does not produce pollution to environment simultaneously, has saved the energy effectively.

Claims

1, a kind of production method of utilizing cinder and slag containing Zn, Fe and Pb, mine containing Zn, Fe and Pb extracting zinc oxide and the pig iron, it is characterized in that: the preparation process step is as follows:

(1) useless lime-ash, the mine containing Zn, Fe and Pb that will contain zinc-iron lead cooperates according to a certain percentage with anthracite, adds suitable moisture, enters high-temperature roasting oxidation in the kiln through the rotary kiln feeding system; Be cooled to gathering system by kiln tail cooling system and generate zinc oxide;

(2) iron content sintered material that kiln hood is got rid of and coke and a small amount of iron ore proportion, and enter the blast furnace pyrotic smelting through feeding system, generate the pig iron and grain slag and metallic lead;

(3) high furnace exhaust gas is purified collection and treatment and generate zinc oxide;

(4) the part blast furnace purification back tail gas that produces in above-mentioned (2) is offered boiler and do the generating of fuel generation steam steam supply turbine, another part tail gas is heated for blast furnace increase heat energy through hotblast stove.

2, a kind of production method of utilizing cinder and slag containing Zn, Fe and Pb, mine containing Zn, Fe and Pb extracting zinc oxide and the pig iron according to claim 1, it is characterized in that: described high furnace exhaust gas is the carbon monoxide of content 95%～99%, the powder that produces after purifying is the zinc oxide that contains 50%-90%, and pig iron content is 95%-98%.