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

Comprehensive utilization of gangue for combined production of electricity, aluminum and cement, and process thereof

A cement production process and coal gangue technology, which are applied in the comprehensive production process of building materials, power generation, and metallurgy fields, can solve the problems of pollution, unstable quality, and high cost, and achieve the effects of improving economic benefits, reducing production costs, and protecting the environment.

Inactive Publication Date: 2014-04-30
雷菊花
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Metal aluminum and alumina are extremely tight industrial products in my country, and the growth rate of production capacity is far from meeting the growth of market demand
The current production of aluminum and the only raw material is the distribution and imbalance of bauxite, and 98% of the mineral deposits are - diaspore, with high impurity content, difficult to dissolve the ore, difficult production, and high cost
my country's cement output is high and ranks first in the world, but the annual output of small cement plants accounts for 80% of the total output, high energy consumption, low output value, unstable quality, and serious pollution

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
  • Comprehensive utilization of gangue for combined production of electricity, aluminum and cement, and process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] Coal gangue power generation is an existing technology, and the main production equipment includes circulating fluidized bed boilers, steam turbines and generators. The generated electricity is supplied to the production process of alumina and electrolytic aluminum, and the fly ash produced by the power plant is used as the raw material for the production of alumina. Alumina production process such as figure 1 Shown:

[0009] The alumina production process mainly includes grinding process, calcination process, dissolution process, evaporation process, desiliconization process, carbon grinding process and roasting process.

[0010] 1. Grinding and calcination process

[0011] Raw materials, fly ash and limestone are crushed by the crusher 1, enter the raw material mill 2, enter the raw material storage 3 after homogenization, and send them to the rotary kiln 4 for calcination, and the burned clinker is sent to the cooler 5. The crystal form is transformed into powder,...

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 comprehensive utilization of gangue for combined production of electricity, aluminum and cement, and process thereof. The invention employs gangue as raw material, and combines electricity generation, aluminium production and cement production, and the power plant waste material fly ash is used for extracting alumina; the cement is produced by using silicon-calcium slag generated in the production process of the aluminum oxide as a raw material. The invention has the advantages of high economic benefit and low cost, and zero discharge in production, etc. The method provided by the invention changes waste into valuables and accords with the sustainable development industrial policy.

Description

Technical field: [0001] The invention belongs to the comprehensive production technology of power generation, metallurgy and building materials, and relates to the production technology of using coal gangue to co-produce electricity, aluminum and cement. Background technique: [0002] Xiaoyi City is rich in coal gangue resources, and the annual discharge of coal gangue exceeds 2-3 million tons. Coal gangue power generation is a mature production process in my country. The slag and fly ash produced by power generation are the raw materials for the production of alumina. If they are not used, they will not only occupy fertile land and cause serious pollution to the environment. [0003] Metal aluminum and alumina are extremely scarce industrial products in my country, and the growth rate of production capacity is far from meeting the growth of market demand. At present, the production of aluminum and the only raw material is the distribution and imbalance of bauxite, and 98% ...

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): C01F7/02C04B7/36C04B7/24
CPCY02P40/10
Inventor 张宏韓德民雷菊花
Owner 雷菊花