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

Production method of copper-containing cast iron

A production method and technology for cast iron, applied in the field of metallurgy, can solve the problems of unconsidered iron impurities, high utilization cost, pollution, etc., and achieve the effects of reducing desulfurization process and desulfurization cost, reducing smelting difficulty, and improving economic benefits.

Active Publication Date: 2021-01-12
CHINA ENFI ENGINEERING CORPORATION
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For example, Chinese patent application 200910163234.7 discloses a method of iron extraction through inert gas injection smelting reduction. Although this method avoids heat loss, it only considers the recovery of iron alone, and does not consider the recovery and utilization of precious metals and copper. , and did not consider the impurities in iron; Chinese patent applications 201010167157.5 and 201010216133.4 both improved the iron extraction process on the basis of the previous patents, but still did not consider the recovery of precious metals and copper
Although Chinese patent application 201110380257.0 considers the problem of copper recovery, there is still the problem of pollution when chlorine salt is added to the process
Chinese patent application 201410345197.2 proposes to use copper slag to produce copper-containing antibacterial stainless steel, but it does not consider the extraction of precious metals, and the process of preparing copper-containing antibacterial stainless steel is complicated, not easy to implement, and the utilization cost is high
Chinese patent application 201510390607.X proposes to use copper-containing slag to prepare copper-containing cast iron, but it does not extract precious metals (Zn, Ag, Au, etc.), and does not treat impurities in copper-containing iron water, so that its products do not meet the requirements

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
  • Production method of copper-containing cast iron
  • Production method of copper-containing cast iron
  • Production method of copper-containing cast iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] (1) Sedimentation treatment to extract precious metals and copper matte

[0083] First, high temperature copper slag (TFe: 42.65%, TCu: 1.12%, Fe 3 o 4 : 16.2%, SiO 2 : 25.9%, Al 2 o 3 : 1.35%, CaO: 2.66%, S: 1.26%, Au: 0.48g / t) are transferred through the tundish to the heating reduction zone in the heating and settling furnace, and the heat is provided by side-blown natural gas to reduce Fe 3 o 4 , the injection pressure is 180kPa, the method is side blowing, and the temperature is raised to 1380 ° C; then the copper slag flows into the settlement area through the partition, and the copper matte is grown by injecting nitrogen, the injection pressure is 180kPa, and the method is side blowing ; Use electrodes to keep the temperature rise at 1380°C, then start the sedimentation process, which is a continuous process; 87% of copper and 88% of precious metals can be recovered during the sedimentation process; the recovered copper matte re-enters the copper smelting pr...

Embodiment 2

[0090] (1) Sedimentation treatment to extract precious metals and copper matte

[0091] First, high temperature copper slag (TFe: 50.45%, TCu: 1.2%, Fe 3 o 4 : 12.2%, SiO 2 : 26.9%, Al 2 o 3 : 1.15%, CaO: 2.86%, S: 1.36%, Au: 0.43g / t) are transferred through the tundish to the heating reduction zone in the heating and settling furnace, and the heat is provided by side-blown natural gas to reduce Fe 3 o 4 , the blowing pressure is 160kPa, the way is side blowing, so that the temperature rises to 1440 °C; then it flows into the settlement area through the partition, and the copper matte grows by blowing nitrogen, the blowing pressure is 160kPa, and the way is side blowing; The electrode keeps the temperature rising at 1440°C, and then the sedimentation process starts, which is a continuous process; 90% of the copper and 90% of the precious metals in the sedimentation process can be recovered; the recovered copper matte enters the copper smelting process again; and the remai...

Embodiment 3

[0098] (1) Sedimentation treatment to extract precious metals and copper matte

[0099] First, high temperature copper slag (TFe: 48.45%, TCu: 1.3%, Fe 3 o 4 : 15.2%, SiO 2 : 28.9%, Al 2 o 3 : 1.33%, CaO: 2.88%, S: 1.66%, Au: 0.42g / t) are transferred through the tundish to the heating and reducing zone in the heating and settling furnace, and the heat is provided by side blowing natural gas to reduce Fe 3 o 4 , the blowing pressure is 250kPa, the method is side blowing, and the temperature is raised to 1500°C; then it flows into the settlement area through the partition, and the copper matte is grown by blowing nitrogen, the blowing pressure is 250kPa, and the way is side blowing; The electrode keeps the temperature rising at 1500°C, and then the sedimentation process begins, which is a continuous process; 92% of copper and 90% of precious metals in the sedimentation process can be recovered; the recovered copper matte enters the copper smelting process again; and the rem...

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 provides a production method of copper-containing cast iron. The production method comprises the following steps that sedimentation treatment is carried out, to-be-treated copper slag isput in a heating reduction zone to be heated to 1300-1500 DEG C, then the heated copper slag is enabled to flow into a sedimentation zone for the sedimentation treatment, so that noble metal and copper matte are separated from the copper slag; fusion reduction treatment is carried out, the copper slag subjected to the sedimentation treatment is put into a reduction furnace, a slagging agent is added and heating is carried out until a material in the reduction furnace is in a molten state, then a reducing agent is blew to the reducing furnace for reduction reaction to obtain copper-containingmolten iron; smelting treatment is carried out, the copper-containing molten iron is placed in a smelting furnace, auxiliaries are added and warming is carried out so as to carry out the smelting treatment; and casting treatment is carried out, the casting treatment is carried out on the copper-containing molten iron subjected to the smelting treatment to obtain the copper-containing cast iron. According to the method, the noble metal is recovered, copper and iron in the copper slag can be comprehensively utilized, the smelting process is omitted, the smelting difficulty and the production cost are greatly reduced, and the method has a good industrial prospect.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a production method of copper-containing cast iron. Background technique [0002] Copper slag is the metallurgical slag discharged from the copper smelting furnace in the process of pyrometallurgy. It is a eutectic melt formed by melting various oxides in the charge and fuel. At present, my country's annual discharge exceeds 10 million tons. In addition, there are more than 120 million tons of copper slag piled up across the country. Copper slag has become a large amount of industrial solid waste generated in the metallurgical industry. Although the copper slag contains various valuable metals such as Fe, Cu, Zn, Pb, Co and Ni and a small amount of precious metals such as Au and Ag, most of the copper slag is piled up in the slag yard, which not only occupies land, pollutes the environment, but also causes A huge waste of resources. If the iron and copper in copper slag can be fully u...

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 Patents(China)
IPC IPC(8): C22B7/04C22B15/00C22C33/06C22C38/02C22C38/04C22C38/42C22C38/46
CPCC22B7/001C22B7/04C22B15/0052C22B15/0054C22C33/06C22C38/02C22C38/04C22C38/42C22C38/46Y02P10/20
Inventor 高永亮李兵尉克俭李东波黎敏郭亚光王雪亮
Owner CHINA ENFI ENGINEERING CORPORATION