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Method for producing cadmium nitrate and copper nitrate in preparation of cast iron ingots by arc process mixed iron slag

A technology of mixed iron and arc method, applied in copper nitrate, chemical instruments and methods, cadmium compounds, etc., can solve the problems of no treatment and utilization methods, environmental pollution, and harm to crop growth.

Inactive Publication Date: 2011-02-09
王嘉兴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of lithopone production, a variety of heavy metal waste residues are produced, such as lead slag, zinc slag, cadmium slag, barium slag, coal slag and other solid wastes. The annual accumulation of about thousands of tons not only pollutes farmland and the environment, but also endangers crops. growth, but also caused the waste of several metal elements such as lead, pickaxe, copper, zinc, germanium, gallium, indium, and chromium in the waste slag
At present, most of this waste residue is piled up in the open air or filled in the gaps or paved, which not only wastes resources, but also pollutes the environment.
For this reason people have carried out a large amount of researches, in 1973 " fine chemical intermediates " in the 01 issue, researched on the production of various products with lithopone waste residue, "Hunan Chemical Industry " also reported in the 1992 volume 22 the first issue "Research on the Preparation of Lead Sulfate from Lithopone Acid Leaching Waste Residue", but the article is only in theoretical research, there is no more practical treatment and utilization method, and there is no arc method to mix iron slag to produce iron ingots to co-produce nitric acid Related reports on the method of cadmium and copper nitrate

Method used

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  • Method for producing cadmium nitrate and copper nitrate in preparation of cast iron ingots by arc process mixed iron slag
  • Method for producing cadmium nitrate and copper nitrate in preparation of cast iron ingots by arc process mixed iron slag

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The method for producing iron ingots and co-producing cadmium nitrate and copper nitrate by electric arc method mixing iron slag comprises the following preparation steps:

[0026] Step A, put the iron slag mixed with electric arc method into the reverberatory furnace 1, and heat slowly (slowly heating at a rate of 2°C per minute) so that the temperature rises to 1600°C; at this time, the iron slag and its iron compounds have melted into The molten iron flows out, and the molten iron is used to produce iron ingots 2; part of the residual carbon monoxide and carbon dioxide gas is also volatilized with the temperature rise in the reverberatory furnace 1, and the remaining waste slag is discharged and cooled to the next process for further processing and extraction rare metal salts;

[0027] Step B, the remaining waste slag (in terms of 500kg pure copper oxide and 200kg pure cadmium oxide) in step A is first pulverized into 80 mesh coarse powder with pulverizer 3, and then...

Embodiment 2

[0033] The method for producing iron ingots and co-producing cadmium nitrate and copper nitrate by electric arc method mixing iron slag comprises the following preparation steps:

[0034] Step A, put the iron slag mixed with arc method into the reverberatory furnace 1, and heat slowly (slowly heating at a rate of 4°C per minute) to make the temperature rise to 1650°C; at this time, the iron slag and its iron compounds have melted into The molten iron flows out, and the molten iron is used to produce iron ingots 2; part of the residual carbon monoxide and carbon dioxide gas is also volatilized with the temperature rise in the reverberatory furnace 1, and the remaining waste slag is discharged and cooled to the next process for further processing and extraction rare metal salts;

[0035] Step B, the remaining waste slag (in terms of 500kg pure copper oxide and 200kg pure cadmium oxide) in step A is first pulverized into a 100-mesh coarse powder with a pulverizer 3, and then tran...

Embodiment 3

[0041] The method for producing iron ingots and co-producing cadmium nitrate and copper nitrate by electric arc method mixing iron slag comprises the following preparation steps:

[0042] Step A, put the iron slag mixed with the electric arc method into the reverberatory furnace 1, and slowly heat (slowly heat at a rate of 5°C per minute) so that the temperature rises to 1700°C; at this time, the iron slag and its iron compounds have melted into The molten iron flows out, and the molten iron is used to produce iron ingots 2; part of the residual carbon monoxide and carbon dioxide gas is also volatilized with the temperature rise in the reverberatory furnace 1, and the remaining waste slag is discharged and cooled to the next process for further processing and extraction rare metal salts;

[0043] Step B, the remaining waste slag (in terms of 500kg pure copper oxide and 200kg pure cadmium oxide) in step A is first pulverized into 120 mesh coarse powder with pulverizer 3, and th...

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Abstract

The invention belongs to the technical field of comprehensive use of waste lead slag from manufacturing of inorganic chemical lithopone, in particular to a method for producing cadmium nitrate and copper nitrate in preparation of cast iron ingots by arc process mixed iron slag. The invention adopts a main technical scheme that: an arc furnace technique is used to extract the heavy metal from the lithopone waste slag; the waste slag is subjected high-temperature treatment, acidic treatment and distillation treatment; and thus, monomer iron, copper and cadmium and valuable compounds thereof are prepared. The method can remove heavy metal slag completely and reduces the pollution of the heavy metal to environment. The method can prepare valuable products and can create great social and economic benefit.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of waste lead slag produced by inorganic chemical industry lithopone, in particular to a method for producing iron ingots and co-producing cadmium nitrate and copper nitrate by mixing iron slag by an electric arc method. technical background [0002] Lithopone is a common name for white high-grade pigment lithopone, and its main raw materials are zinc dioxide, sulfuric acid, barite and anthracite. It is prepared by metathesis reaction of barium sulfide and zinc sulfide. In the process of lithopone production, a variety of heavy metal waste residues are produced, such as lead slag, zinc slag, cadmium slag, barium slag, coal slag and other solid wastes. The annual accumulation of about thousands of tons not only pollutes farmland and the environment, but also endangers crops. Growth, but also caused the waste of several metal elements such as lead, pickaxe, copper, zinc and german...

Claims

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Application Information

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IPC IPC(8): C01G3/08C01G11/00C22B17/00C22B7/04C22B15/00
CPCY02P10/20
Inventor 王嘉兴
Owner 王嘉兴
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