Unlock instant, AI-driven research and patent intelligence for your innovation.

Low-carbon treatment method of ardealite in pyrometallurgy of nonferrous metal

A non-ferrous metal and phosphorus disposal technology, applied in the field of non-ferrous metal pyrometallurgy, can solve the problems of high total phosphorus content of phosphogypsum, high energy consumption and large-scale production, difficulty in acid production, etc., and achieves low investment, low cost, and reduced greenhouse Effects of Gas Emissions

Inactive Publication Date: 2013-11-20
CENT SOUTH UNIV
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, since the 1970s, people have carried out a lot of research and development on the production of sulfuric acid and cement from phosphogypsum, but the quality of the cement cannot meet the standard due to the high content of total phosphorus and free CaO, and the SO in the flue gas 2 Due to the low concentration, it is difficult to make acid, and the high energy consumption has not been able to achieve large-scale production.
Recently, the WTP wet-process phosphoric acid production process introduced from the United States can solve the problem of high total phosphorus content in phosphogypsum. Free CaO , CaS and SO 3 Basic research has been carried out on the control of the control, but special Phosphogypsum Treatment plants, including acid and cement production systems, require substantial investment and land
At present, there is no relevant literature report on phosphogypsum as a calcium-containing flux in non-ferrous smelting

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The chemical composition of copper sulfide concentrate is (wt%): Cu18.16, Fe 29.05, S31.41, SiO 2 7.44, CaO 1.53, MgO 0.77, Pb 0.88, Zn2.56, As 0.35; the chemical composition of phosphogypsum is (wt%): CaO 38.10, SO 3 43.59, SiO 2 14.47, Fe 2 O 3 0.26, P 2 O 5 1.54, Al 2 O 3 0.38; the chemical composition of the returned converter slag is (wt%): CaO 0.4, SiO 2 24.17, Fe 47.42, Cu 3.25, S 1.93, Zn 1.76. In this embodiment, converter slag and quartz sand are used as auxiliary materials, and the main components used in oxygen-enriched matte smelting are: Fe 0.95wt%, SiO 2 34.60wt%, CaO10.63wt% ternary slag; According to the composition content and treatment capacity of copper sulfide concentrate, the composition content and treatment capacity of auxiliary materials, and the main composition content of the designed slag, calculate the slag-forming agent that needs to be added. The amount of calcium, after calculating the amount of phosphogypsum according to th...

Embodiment 2

[0031] The main components of the slag for the flash matte smelting of copper sulfide concentrate are (wt%): Cu0.90wt%, Fe36.50wt% (existing form and content are Fe 3 O 4 11.50wt%, FeO 38.96wt%), S1.00, SiO 2 33.60. The main components used for slag depletion in the matte smelting furnace are: Fe30.52wt%, CaO6.36wt% and SiO 2 31.60 wt% ternary slag; according to the composition content and processing capacity of the copper sulfide concentrate matte smelting liquid slag, and the main component content of the designed electric furnace depleted slag, calculate the amount of calcium that needs to be added in the slag-forming agent, according to The amount of calcium added in the slag-forming agent and the calcium content of phosphogypsum, after calculating the consumption of phosphogypsum, the electric furnace depletion operation carried out at 1200 ° C; Weigh 1000g of flash matte smelting slag, mixed into Example 1 The phosphogypsum 184.4g of the component is used to replace ...

Embodiment 3

[0033] The main components of liquid matte are (wt%): Cu49.50wt%, Fe21.00wt%, S21.50wt%, Pb0.50wt%, Zn0.18wt%. The iron-calcium slag with CaO / Fe=0.37 (mass ratio) is used for matte continuous blowing; according to the composition content and processing capacity of liquid matte, the main component content of the designed slag, the calcium that needs to be added in the slag-forming agent is calculated According to the amount of calcium added in the slag-forming agent and the calcium content of phosphogypsum, after calculating the consumption of phosphogypsum, weigh 1000g of the matte powder of the above-mentioned components, and mix the phosphogypsum of the components described in Example 1. 203.94g, to replace 173.44g of limestone with 80% grade. Mix uniformly; at temperatures above 1250 °C, use 80% O 2 269L of oxygen-enriched air is used for matte flash blowing. Obtained blister copper 395.7g, copper direct yield 79.14%; slag 532.86g, containing Cu19.38 wt%, CaO14.58 wt%, Fe...

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

No PUM Login to View More

Abstract

The invention discloses a low-carbon treatment method of ardealite in pyrometallurgy of nonferrous metal, belonging to the technical field of pyrometallurgy. The method comprises the following steps of: using ardealite as a calcium-containing fusing agent in a slag former, calculating the addition of calcium in the slag former according to the contents and throughout of raw materials and auxiliary materials in a furnace and the designed contents of main components of the slag in pyrometallurgy of nonferrous metal, calculating the dosage of ardealite according to the addition of calcium in the slag former and the calcium content of ardealite, and finally performing pyrometallurgy of nonferrous metal at 1200-1250 DEG C. According to the method, special plants and equipment are not needed to be built, ardealite solid waste is treated incidentally during the existing pyrometallurgy of nonferrous metal, the oxidation reaction heat and by-product high-concentration SO2 smoke generated during the pyrometallurgy of nonferrous metal are fully used, and low-cost treatment of ardealite and efficient utilization of resource are realized.

Description

technical field [0001] The invention relates to a method for low-carbon disposal of phosphogypsum in pyrometallurgy of nonferrous metals, belonging to the technical field of nonferrous metal pyrometallurgy. Background technique [0002] Phosphorus chemical wet process produces one ton of P 2 o 5 It is necessary to produce 5 tons of phosphogypsum. The global annual output of phosphogypsum is nearly 200 million tons, and the domestic output is about 70 million tons per year. Phosphogypsum is a huge amount of industrial solid waste, which is facing the double pressure of land occupation and environmental protection; phosphogypsum is also a huge resource of sulfur and calcium, and my country is short of sulfur resources, such as sulfur imports account for more than two-thirds of the consumption. Although there are many ways to use phosphogypsum, such as directly using it as a raw material for building materials such as gypsum boards and gypsum blocks, compared with natural gyp...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02
Inventor 唐朝波唐谟堂陈永明何静杨声海杨建广叶龙刚
Owner CENT SOUTH UNIV