Unlock instant, AI-driven research and patent intelligence for your innovation.
A method for enriching lead from low-grade lead slag
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A low-grade, lead slag technology, applied in the direction of improving process efficiency, can solve the problems of complex composition, high energy consumption, large occupational injury and so on
Active Publication Date: 2019-03-01
杨云婷
View PDF9 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
At present, for the lead-containing materials that are difficult to beneficiated and have complex components and are not suitable for pyroprocessing, the direct pyrolysis recovery causes air pollution, high energy consumption, and relatively large occupational injuries. Wet recovery can avoid the above problems, but the technical difficulty is great.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
[0021] 1. Add lead sulfate slag to the liquid after calcium chloride washing at a liquid-solid ratio of 5:1, heat to 40-50°C, stir for 30 minutes, and filter to obtain the washing liquid and washing residue. The washing liquid contains Pb4 2 ~10g / L, the washing residue contains 20% Pb.
[0022] 2. Raise the temperature of the lotion to 70°C, add lime to adjust the pH>12, react for 30 minutes and filter to obtain zinc-calcium-magnesium slag and dezincified calcium-magnesium solution. Zinc-calcium-magnesium slag contains Pb<0.1%, Zn 12%, Fe2.4%, Mn2.6%, Mg2.6%, after dezincification calcium and magnesium liquid contains Pb<150mg / L, Zn<200mg / L, Fe< 50mg / L, Mn<50mg / L, Mg200mg / L, Cl17g / L.
[0023] 3. Add the washed residue to the acid-adjusted solution (Pb140mg / L, Zn140mg / L, Ca 10g / L, Cl 200g / L) at a liquid-solid ratio of 5:1, raise the temperature to 70-80°C, stir for 1 hour, and control the end po...
[0029] 1. Add lead sulfate slag to the liquid after calcium chloride washing at a liquid-solid ratio of 5:1, heat to 50-60°C, stir for 30 minutes, and filter to obtain the washing liquid and washing residue. The washing liquid contains Pb179mg / L and Zn3.9g / L, Fe 0.8g / L, Mn1.56g / L, Mg 0.62g / L, Cl 3.8g / L, SO 4 2 ~11g / L, the washing residue contains 34% Pb.
[0030] 2. Raise the temperature of the lotion to 65°C, add lime to adjust the pH to 13-14, react for 30 minutes, and filter to obtain zinc-calcium-magnesium slag and dezincified calcium-magnesium solution. Zinc-calcium-magnesium slag contains Pb<0.1%, Zn 16.5%, Fe2.4%, Mn2.6%, Mg2.6%, after dezincification calcium and magnesium liquid contains Pb<50mg / L, Zn<50mg / L, Fe< 50mg / L, Mn<50mg / L, Mg200mg / L, Cl 25g / L.
[0031] 3. Add the washed residue to the acid-adjusted solution (Pb 500mg / L, Zn 300mg / L, Ca 13.5g / L, Cl210g / L) at a liquid-solid ra...
Embodiment example 3
[0036] Lead slag contains Pb10%, Zn13%, Fe5%, Mn0.8%, Mg0.4%, S12%.
[0037] 1. Add low-grade lead slag to the liquid after calcium chloride washing at a liquid-solid ratio of 5:1, heat to 60°C, stir for 30 minutes, and filter to obtain the washing liquid and washing residue. The washing liquid contains 200mg / L of Pb and 20g / L of Zn L, Fe 5g / L, Mn1.3g / L, Mg 0.62g / L, Cl 3.8g / L, SO 4 2 ~13g / L, the washing residue contains 34% Pb.
[0038] 2. Raise the temperature of the lotion to 65°C, add lime to adjust the pH to 13-14, react for 30 minutes, and filter to obtain zinc-calcium-magnesium slag and dezincified calcium-magnesium solution. Zinc-calcium-magnesium slag contains Pb<0.1%, Zn 16.5%, Fe2.4%, Mn2.6%, Mg2.6%, after dezincification calcium and magnesium liquid contains Pb<50mg / L, Zn<50mg / L, Fe< 50mg / L, Mn<50mg / L, Mg200mg / L, Cl 25g / L.
[0039] 3. Add the washed slag to the acid-adjusted solution (Pb100mg / L, Zn 100mg / L, Ca 8.1g / L, Cl180g / L) at a liquid-solid ratio of 6:1, ra...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention discloses a method for enriching lead from low-grade lead slag. The method comprises following steps: firstly, low-grade lead slag is added into calciumchloride washing after-liquid, and after filtering, washing liquid and washing slag are obtained; secondly, the washing liquid is subject to temperature rise to adjust PH, after the reaction and filter, zinc, calcium and magnesium slag and zinc, calcium and magnesium removal after-liquid are obtained; thirdly, the washing slag is added into acid adjusting after-liquid, temperature rising stirring is carried out, and after filter, leaching liquid and leaching slag are obtained; fourthly, leaching liquid is subject to temperature rise, stirring is carried out, the PH value is adjusted, lead removal after-liquid and lead slag are obtained, the lead removal after-liquid and a calcium chloride solution jointly enter an acid adjusting pond, then, the PH is adjusted, and acid adjusting after-liquid is made, and returns to the third step to be used; fifthly, according to the liquid-solid ratio being 5:1, calcium and magnesium removal after-liquid and a small amount of water are added into the lead slag obtained in the fourth step, stirring and filtering are carried out, high-lead slag and calcium chloride washing after-liquid are obtained, the PH of the calcium chloride washing after-liquid is adjusted, and the calcium chloride washing after-liquid returns to the first step to be used. According to the method, the enrichment efficiency is extremely high, the lead recycling rate is high, the lead is enriched, the content is improved, the recycling methods are many, the process difficulty is low, and the development space is large.
Description
technical field [0001] The invention relates to the field of zincmetallurgyrecovery, more specifically, a method for enriching lead from low-grade lead slag. Background technique [0002] Lead sulfate slag is the waste residue discharged during the production and use of zinc metallurgy and zinc products. It is not only a harmful substance that pollutes the environment, but also a secondary resource for extracting valuable components. Therefore, it must be comprehensively treated to achieve "open source and reduce expenditure" and prevent pollution. the goal of. At present, for lead-containing materials that are difficult to beneficiate and complex in composition, and are not suitable for pyroprocessing, the direct pyrolysisrecovery causes air pollution, high energy consumption, and greater occupational injury. Wet recovery can avoid the above problems, but the technology is difficult. Contents of the invention [0003] In order to make up for the above deficiencies, th...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More