Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Red mud resource recycling process
Red mud is waste residues generated during aluminum oxide extraction in the aluminum production industry, is red due to contained iron oxide, and is called as red mud. Red mud is the biggest waste residues generated in alumina production, and brings heavy burden to the environment. Production enterprises depend on large-area open-air places for stacking, and most of storage yard dam bodies are constructed by red mud. Many available components in the red mud are not developed yet, so that resources are wasted. Along with the rapid development of the aluminum industry and the reduction of the ore grade, the yield of red mud becomes larger and larger, so that the resource recycling and utilization of red mud become main research subjects and directions. The recycling process is characterizedin that red mud is placed in a rotary kiln and sintered, iron oxide is changed into sodium ferrite at a temperature of 600-700 DEG C, ferric hydroxide is obtained after hydrolysis, and iron is removedthrough a primary amine N-1923 reagent. Aluminum oxide, magnesium, calcium chloride and sodium chloride are recycled, and water is reused. Ferroferric oxide is recycled through a residue magnetic separation method, and the residues and coal gangue are used for making bricks.
赤泥是制铝工业提取氧化铝时产生的废渣，因含有氧化铁而呈红色，固称赤泥。赤泥是氧化铝生产产生的最大废渣，给社会环境带来沉重的负担。生产企业依靠大面积的露天场所堆放，并且大部分堆场坝体用赤泥构筑而成。赤泥中许多可利用成分还未得到开发，造成资源浪费。随着铝工业的快速发展和矿石品位的降低，赤泥产出量会越来越大，因此赤泥的资源回收与利用，已成为日益主要的研究课题与方向。本发明的特征为，把赤泥置于旋转窑烧结，在600‑700℃使铁的氧化物变为铁酸钠，水解后为氢氧化铁，用伯胺N‑1923试剂除铁。回收氧化铝、镁、氯化钙，回收氯化钠，水回用。余渣磁选法回收四氧化三铁，余渣与煤矸石制砖。
Red mud resource recycling process
Red mud is waste residues generated during aluminum oxide extraction in the aluminum production industry, is red due to contained iron oxide, and is called as red mud. Red mud is the biggest waste residues generated in alumina production, and brings heavy burden to the environment. Production enterprises depend on large-area open-air places for stacking, and most of storage yard dam bodies are constructed by red mud. Many available components in the red mud are not developed yet, so that resources are wasted. Along with the rapid development of the aluminum industry and the reduction of the ore grade, the yield of red mud becomes larger and larger, so that the resource recycling and utilization of red mud become main research subjects and directions. The recycling process is characterizedin that red mud is placed in a rotary kiln and sintered, iron oxide is changed into sodium ferrite at a temperature of 600-700 DEG C, ferric hydroxide is obtained after hydrolysis, and iron is removedthrough a primary amine N-1923 reagent. Aluminum oxide, magnesium, calcium chloride and sodium chloride are recycled, and water is reused. Ferroferric oxide is recycled through a residue magnetic separation method, and the residues and coal gangue are used for making bricks.
赤泥是制铝工业提取氧化铝时产生的废渣，因含有氧化铁而呈红色，固称赤泥。赤泥是氧化铝生产产生的最大废渣，给社会环境带来沉重的负担。生产企业依靠大面积的露天场所堆放，并且大部分堆场坝体用赤泥构筑而成。赤泥中许多可利用成分还未得到开发，造成资源浪费。随着铝工业的快速发展和矿石品位的降低，赤泥产出量会越来越大，因此赤泥的资源回收与利用，已成为日益主要的研究课题与方向。本发明的特征为，把赤泥置于旋转窑烧结，在600‑700℃使铁的氧化物变为铁酸钠，水解后为氢氧化铁，用伯胺N‑1923试剂除铁。回收氧化铝、镁、氯化钙，回收氯化钠，水回用。余渣磁选法回收四氧化三铁，余渣与煤矸石制砖。
Red mud resource recycling process
赤泥资源回收与利用工艺
XU GUOYONG (Autor:in) / LI FAXIANG (Autor:in) / DONG TING (Autor:in)
18.09.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
/
C01D
Verbindungen der Alkalimetalle, d.h. des Lithiums, Natriums, Kaliums, Rubidiums, Cäsiums oder Franciums
,
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
/
C01G
Verbindungen der von den Unterklassen C01D oder C01F nicht umfassten Metalle
,
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
/
C04B
Kalk
,
LIME
Resource recycling : North America's recycling journal
TIBKAT | Nachgewiesen 7.1988/89 -
Recycling & Composting Resource Center
Online Contents | 1998