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Side-blowing material-smelting production method

A production method and technology of symbiotic ore, which is applied in the field of metallurgy, can solve the problems that are not suitable for the treatment of full cold material or the zinc leaching slag of lead-zinc symbiotic ore, and achieve the advantages of convenient industrial continuous production, stable SO2 concentration, and favorable industrial continuous production Effect

Active Publication Date: 2013-11-06
YUNNAN CHIHONG ZINC & GERMANIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent includes a reduction stage and a fuming stage, but the method is used to treat molten lead oxide slag, so low concentrations of SO will not be produced in the fuming stage 2 Gas, but not suitable for full cold material treatment or treatment of lead-zinc symbiotic ore zinc leaching slag

Method used

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  • Side-blowing material-smelting production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Adopt bed area 6m 2 For side-blown furnaces, first place firewood on the bottom of the furnace for 1.2 meters, then spread 1.8 meters of coke (including C76%) on top of it, light the firewood, and blast at 3000Nm 3 / h, after 1 hour, the blast volume is adjusted to 22000Nm 3 / h, evenly supply pulverized coal (containing C55%, more than 80% of the particle size is less than 0.127mm) 4t / h, when the temperature in the furnace rises to 900°C, put 20t of lead-zinc symbiotic ore evenly within 30min, after 1 hour A molten pool with a depth of 0.95m is formed.

[0025] Lead-zinc symbiotic ore (Pb3.5%, Zn13.4%, S0.3%, SiO 2 11.2%, CaO12.6%) and zinc leaching slag (Pb7.4%, Zn17.0%, S5.8%, SiO 2 4.8%, CaO1.2%) to form a mixture according to the ratio of 1:2, 25t of mixture, 5t of limestone (CaO52%) and 3.5t of pulverized coal are evenly added within 40 minutes, and the blast volume is 26000 Nm 3 / h (excess air coefficient 0.9).

[0026] The material temperature is 1100°C, and ...

Embodiment 2

[0028] Adopt bed area 6m 2 For side-blown furnaces, first place firewood on the bottom of the furnace for 1.8 meters, then spread 1.6 meters of coke (including C76%) on top of it, light the firewood, and blast at 3000Nm 3 / h, after 1.6 hours, the blast volume is adjusted to 19000Nm 3 / h, evenly supply 3.5t / h of pulverized coal (containing C55%, the particle size is less than 0.127mm accounting for more than 80%), when the temperature in the furnace rises to 1000°C, evenly input 25t of zinc leaching slag within 50min, after 1.5 hours A molten pool with a depth of 1.19m is formed.

[0029] Lead-zinc symbiotic ore (Pb5.0%, Zn10.4%, S0.4%, SiO 2 10.5%, CaO9.6%) and zinc leaching slag (Pb5.6%, Zn18.2%, S7.2%, SiO 2 6.6%, CaO0.8%) to form a mixture according to the ratio of 1:5, 35t of mixture, 10t of limestone (CaO52%) and 5t of pulverized coal are evenly added within 60 minutes, and the blast volume is 26000 Nm 3 / h (excess air coefficient 0.95).

[0030] The material tempera...

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Abstract

The invention belongs to the technical field of metallurgy and discloses a side-blowing material-smelting production method. The side-blowing material-smelting production method comprises the following steps of: 1) building a furnace hearth, and 2) normally smelting materials: forming a mixed material by adopting lead zinc paragenic ore and zinc leaching slag at any proportion; uniformly adding the mixed material, limestone and powdered coal within 30-60min under the conditions of temperature at 1000-1300 DEG C and excess air coefficient below 0.8-1.0, wherein the percentage of the powdered coal is 25-35% and SiO2 / CaO=1 / (1.5-2) of slag is controlled by the dosage of the limestone; after completely adding the materials, adjusting coal feeding volume and blast volume, thereby adjusting the excess air coefficient to be 0.7-0.9; after smelting the materials for 30-60min, reducing the lead in the materials to lead bullion, zinc and other components, thereby forming smelted slag; and after finishing material smelting, discharging the lead bullion and sending the lead for refining. The problems of high leaching slag and iron slag pollution are solved; the problem that lead and zinc metal cannot be separated when the lead zinc paragenic ore and zinc leaching slag are treated by using a rotary kiln or fuming furnace is solved; and the side-blowing material-smelting production method is beneficial to continuous production.

Description

technical field [0001] The invention relates to a production method for side blowing treatment of total cold material (including lead-zinc symbiotic ore and zinc leaching slag), which belongs to the technical field of metallurgy. Background technique [0002] Lead-zinc symbiotic ore is a kind of lead-zinc metallurgical raw material. At present, the production technology of lead-zinc symbiotic ore to recover valuable metals in the world mainly includes rotary kiln method and fuming furnace method. Due to the symbiosis of lead and zinc metals in the lead-zinc symbiotic ore, the separation of lead and zinc cannot be achieved by rotary kiln or fuming furnace. [0003] Zinc leaching slag is the metallurgical slag produced in the conventional leaching process of zinc hydrometallurgy. Subsequent treatment methods for zinc leaching slag include rotary kiln method, fuming furnace method and high temperature and high acid leaching method. Due to the high sulfur content of zinc leach...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/00C22B7/04C22B13/00
CPCY02P10/20
Inventor 陈进贾著红王忠实罗文权高魁庄福礼吴红林俞兵张候文马绍斌方锦邹利明罗凌艳王瑞山
Owner YUNNAN CHIHONG ZINC & GERMANIUM
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