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

CRT lead-containing glass treatment method

A processing method and glass technology, which are applied in the field of solid waste resource utilization, can solve the problems of reducing the reduction temperature of CRT cone glass, increasing the pressure on environmental protection, and long recovery cycle, so as to increase production economic benefits, reduce pollution, and reduce production costs. Effect

Active Publication Date: 2017-05-31
CHENZHOU CITY JINGUI SILVER IND CO LTD
View PDF10 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this method is: the silicon, potassium, and sodium components in the waste CRT lead-containing glass can be converted into water glass, and the recovery of lead-containing compounds can be solved at the same time, and the recycling of lead resources can be realized. The disadvantage of this method is: the recovered lead It is still necessary to join the lead smelting system for smelting, the recovery period is long, and sulfur is added, which increases the pressure on environmental protection
[0007] For example, in the patent application number 201310229888.1, the CRT cone glass is activated by ball milling with reducing agent and alkaline additives, and then put into a furnace for roasting at a temperature of 900-1000°C under nitrogen gas conditions to obtain glass and glass with a lead content of less than 2%. High-purity metallic lead, the advantages of this process are: high-energy ball mill is used as mechanical activation equipment, the activation efficiency is high, and the reduction temperature of CRT conical glass can be effectively reduced; lead in conical glass can be effectively recovered to reduce environmental pollution; separated Metal lead and lead-free glass can be reused. The disadvantage of this process is that the operation is cumbersome

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
  • CRT lead-containing glass treatment method
  • CRT lead-containing glass treatment method
  • CRT lead-containing glass treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] see figure 1 , which is a process flow diagram of a processing method for CRT lead-containing glass according to an embodiment of the present invention. As an embodiment of the present invention, the processing method of described CRT lead-containing glass comprises the following steps:

[0032] 1) Break the CRT leaded glass to less than 1mm. The main components of the CRT leaded glass are shown in Table 1.

[0033] 2) Mix the crushed CRT lead-containing glass, lead concentrate, and limestone (slagging agent) according to the ratio of 4.5 to 6:10:4 to 5 to obtain a mixed material. The main components of limestone and lead concentrate are shown in the table 1.

[0034] Table 1 Material and product composition table (by mass percentage)

[0035] Pb% Ag(g / t) Au(g / t) Bi% Cu% Sb% Zn% SiO 2 %

S％ CaO% leaded glass 18.21 48 limestone 80 lead concentrate 51.32 1215.35 100.54 0.15 0.23 0...

Embodiment 2

[0088] see figure 1 , which is a process flow diagram of a processing method for CRT lead-containing glass according to an embodiment of the present invention. As an embodiment of the present invention, the processing method of described CRT lead-containing glass comprises the following steps:

[0089] 1) Break the CRT leaded glass to less than 1mm. The main components of the CRT leaded glass are shown in Table 1.

[0090] 2) Mix the crushed CRT lead-containing glass, lead concentrate, and limestone (slagging agent) according to the ratio of 4.5 to 6:10:4 to 5 to obtain a mixed material. The main components of limestone and lead concentrate are shown in the table 1.

[0091] Table 1 Material and product composition table (by mass percentage)

[0092] Pb% Ag(g / t) Au(g / t) Bi% Cu% Sb% Zn% SiO 2 %

S％ CaO% leaded glass 18.08 45 limestone 82.5 lead concentrate 50.67 1242.65 105.28 0.14 0.24 ...

Embodiment 3

[0105] see figure 1 , which is a process flow diagram of a processing method for CRT lead-containing glass according to an embodiment of the present invention. As an embodiment of the present invention, the processing method of described CRT lead-containing glass comprises the following steps:

[0106] 1) Break the CRT leaded glass to less than 1mm. The main components of the CRT leaded glass are shown in Table 1.

[0107] 2) Mix the crushed CRT lead-containing glass, lead concentrate, and limestone (slagging agent) according to the ratio of 4.5 to 6:10:4 to 5 to obtain a mixed material. The main components of limestone and lead concentrate are shown in the table 1.

[0108] Table 1 Material and product composition table (by mass percentage)

[0109] Pb% Ag(g / t) Au(g / t) Bi% Cu% Sb% Zn% SiO 2 %

S％ CaO% leaded glass 18.47 49 limestone 75.8 lead concentrate 52.15 1223.07 103.36 0.16 0.22 ...

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 CRT lead-containing glass treatment method which comprises the following steps: compounding CRT lead-containing glass, lead concentrate and a slag former to obtain a mixed material; mixing pelletizing the mixed material; oxidizing smelting the granules obtained through mixing palletizing to generate primary lead bullion, high-lead slag and exhaust gas; reduction smelting the high-lead slag, continuously adding the slag former limestone and a reducing agent pulverized coal according to ingredients during the reduction smelting process, and taking natural gas as fuel for reduction smelting to generate secondary lead bullion, furnace clinker and exhaust gas; enabling the furnace clinker generated through reduction smelting to enter a fuming furnace for recycling zinc; and enabling the primary lead bullion and secondary lead bullion to enter a lead electrolysis system for electrorefining so as to recycling lead. According to the invention, the CRT lead-containing glass and lead concentrate are mixed for redox smelting, lead can be dissociated under high temperature to participate in various metallurgy reaction, the generated waste slag contains less than 1% of lead, and the recovery rate of lead is greater than 94%.

Description

technical field [0001] The invention relates to the field of resource utilization of solid waste, in particular to a harmless treatment method for CRT lead-containing glass. Background technique [0002] CRT lead-containing glass is mainly the lead-containing glass of cathode ray tubes on TV and personal computer monitors. The glass shell of CRT display is mainly connected by tube screen glass, tube neck glass and tube cone glass through low melting point sealing glass. Generally speaking, the lead oxide content in tube screen glass is low, about 0-4%; High and high breakdown resistance) contain 32 to 35% lead oxide; and the lead oxide content of sealing glass (the smallest proportion, about 1%) is as high as 76%. According to the Stanford estimation model, the apparent consumption of CRT TVs in my country in recent years has been calculated, combined with the accelerating factors of technological progress and policy support, it is estimated that the theoretical scrapping o...

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
IPC IPC(8): B09B3/00B09B5/00C22B7/00C22B13/02C22B19/30C25C1/18C01B17/74
CPCB09B3/00B09B5/00C01B17/74C22B7/001C22B13/025C22B19/30C25C1/18Y02P10/20
Inventor 陈兰杨跃新谢兆凤
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD