Comprehensive utilization method for zinc oxide ore

A zinc oxide ore and zinc oxide technology, which is applied in the direction of zinc oxide/zinc hydroxide, zinc sulfide, nanotechnology for materials and surface science, etc., can solve the problem of high mud content, low zinc concentration in leachate, and impurity components Complicated issues

Inactive Publication Date: 2016-11-16
李果
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] 1. Due to the low zinc content of minerals, high mud content, low zinc concentration in the leach solution, large consumption of leaching agents and high cost, enterprises cannot afford it
[0007] 2. Due to the complex composition of impurities, the qualified rate of the produced products is low, and the product price is low and the economic benefits are poor
[0008] 3. When leaching by conventional means, the leaching rate of zinc ore is low, the waste is large, and the value of zinc ore cannot be utilized and reflected

Method used

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  • Comprehensive utilization method for zinc oxide ore
  • Comprehensive utilization method for zinc oxide ore
  • Comprehensive utilization method for zinc oxide ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Raw material: a zinc oxide mine in Yunnan 1 # , its composition is: Zn15.68%.Fe18.20%.SiO 2 7.94%, and its zinc phase composition is 9.49% zinc carbonate, 2.12% zinc silicate, 0.83% zinc sulfide, and 3.14% iron-zinc spinel.

[0059] Method for preparing zinc oxide:

[0060] (1) Leaching: 500g of low-grade zinc oxide ore 1 # Carry out leaching with 1500ml ammoniacal liquor-ammonium bicarbonate liquid as leaching agent; Wherein, the molar concentration c(NH 3 ·H 2 O)=4.5mol mol / L, CO 3 2 and HCO 3 The molar concentration of c(CO 3 2 +HCO 3 )=1.2mol / L, add sodium dodecylbenzene sulfonate in the amount of 0.3kg sodium dodecylbenzene sulfonate added in the leaching agent per cubic meter of leaching agent; when leaching, adopt ball milling, and ensure The leaching time in the ball mill is 60 minutes, and all the materials at the outlet of the ball mill pass through an 80-mesh sieve; the total leaching time is 3 hours, and the temperature is 40°C; after solid-liquid ...

Embodiment 2

[0065] Raw material: zinc oxide ore 2 # , its composition is: Zn9.67%.Fe18.34%.SiO 2 17.62%, CaO9.34%, its zinc phase composition is zinc carbonate 12.28%, zinc silicate 2.37%, zinc sulfide 0.82%, iron-zinc spinel 3.20%.

[0066] Method for preparing zinc oxide:

[0067] (1) Leaching: 5000g zinc oxide ore 2 # Carry out leaching with 15000ml ammoniacal liquor-ammonium bicarbonate liquid as leaching agent; Wherein, the molar concentration c(NH 3 ·H 2 O)=7mol mol / L, CO 3 2- and HCO 3 - The molar concentration of c(CO 3 2- +HCO 3 -)=1.5mol / L, add sodium dodecylbenzenesulfonate in the amount of adding 0.05kg of surfactant sodium dodecylbenzenesulfonate in every cubic meter of leaching agent; when leaching, adopt ball milling, and Ensure that the leaching time in the ball mill is 60 minutes, and all the materials at the outlet of the ball mill pass through a 120-mesh sieve; the total leaching time is 3 hours, and the temperature is 25°C; the zinc in the obtained zinc-amm...

Embodiment 3

[0073] Raw material: zinc oxide ore 3 # , its composition is: Zn13.6%.Fe18.67%.SiO 2 17.83%, Al 2 o 3 9.92%, CaO9.34%, its zinc phase composition is zinc carbonate 7.96%, zinc silicate 2.21%, zinc sulfide 0.76%, iron-zinc spinel 2.67%.

[0074] Method for preparing zinc oxide:

[0075] (1) Leaching: 1t zinc oxide ore 3 # Carry out leaching with 3000L ammoniacal liquor-ammonium bicarbonate liquid as leaching agent; Wherein, the molar concentration c(NH 3 ·H 2 O)=5.8mol mol / L, CO 3 2- and HCO 3 - The molar concentration of c(CO 3 2 +HCO 3 )=1.15mol / L, add the amount SDS of the surfactant SDS of 00.01kg in every cubic meter of leaching agent; Mesh sieve; the total leaching time is 3.5 hours, and the temperature is 35°C; after solid-liquid separation, 119.95 kilograms of zinc in the obtained zinc-ammonia complex solution; the leaching rate of zinc oxide ore zinc is 88.19%; add 55% secondary zinc oxide Leach again, and the obtained leaching solution contains zinc Zn=7...

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Abstract

The invention relates to a method for production of zinc oxide products from zinc oxide ore and comprehensive utilization of tailings. According to the method, zinc in the zinc oxide ore is leached by using an ammonia process, then a nonsulfided zinc-containing material with zinc content of 15% or more is added to improve the concentration of zinc in leachate so as to allow zinc oxide ore with a lower grade to be applicable to ammonia-process smelting, and purification, impurity removal, ammonia vaporization, crystallization, drying and calcining are successively carried out to prepare the zinc oxide product; and all or a part of the zinc oxide tailings obtained after leaching are added into brick-making raw materials for brick-making, flue dust is collected during sintering of bricks and then cooled so as to obtain a crude zinc oxide product, and the crude zinc oxide product is returned to the procedure of leaching so as to produce zinc oxide. The method provided by the invention employs a conventional process, the content of prepared zinc oxide is greater than 95%, and the extraction rate of oxidative zinc is more than 85%; and flue dust tailings obtained after extraction are used for preparing bricks via a frequently-used method, so high benefits, environmental protection and comprehensive utilization of the zinc oxide ore are realized.

Description

technical field [0001] The invention relates to a method for producing zinc oxide products from zinc oxide ore and comprehensively utilizing tailings slag. Background technique [0002] At present, the production of zinc oxide products generally uses ore with high zinc content to be roasted into zinc calcine as raw material, because its zinc content is relatively high, and leaching is relatively easy. With years of mining, high-grade ore sources have become less and less, and the grade has gradually decreased. People have begun to pay attention to the utilization of zinc oxide ore. However, zinc oxide ore usually has a low zinc content (valuable element content of Zn below 30%; Pb 0.15%; Cu 0.008%; Mn 0.06%), and the composition is complex, mostly smithsonite, zinc iron spinel and heteropolar The ore exists, and the gangue components in the ore are high in iron oxide, silicon oxide, calcium oxide, and magnesium oxide (about Fe2O34-7%; SiO23-5%; CaO30-32%; MgO 7-8%). The va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82Y40/00C04B33/132C01G9/08
CPCB82Y30/00C01G9/02C01G9/08C01P2004/62C01P2004/64C01P2006/80C04B33/132Y02P40/60
Inventor 李果
Owner 李果
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