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Thermal power generation co-processing technology for overhaul slag of aluminum electrolysis cell
The invention discloses a thermal power generation co-processing technology for overhaul slag of an aluminum electrolysis cell, which comprises the following steps: cooling waste cathode carbon blocks and overhaul slag harmful solid wastes, crushing by a crusher to meet the use fineness requirement of power plant pulverized coal, mixing the pulverized coal and the overhaul slag according to a ratio of 1: (0.002-0.004), burning, directly decomposing a small amount of cyanide at high temperature, enabling large amount of fluoride to enter a limestone-gypsum method desulfurization system of a power plant through flue gas to react with limestone slurry, reacting F<-> with a large amount of excessive Ca<2+> in the slurry to generate CaF2 precipitates, sintering other unburned solid wastes, and then discharging along with coal cinder, wherein the unburned solid wastes mainly comprise aluminum oxide, silicon oxide and the like and can be used as production raw materials of cement. The method creatively solves the problem of pollution caused by the harmful solid waste of the overhaul slag, and realizes waste reutilization while treating the harmful solid waste.
本发明公开了一种铝电解槽大修渣火力发电协同处理技术，将废阴极炭块及大修渣有害固体废弃物冷却后，经破碎机破碎达到发电厂煤粉的使用细度要求，按照煤粉和大修渣1：（0.002～0.004）的比例混合后进行燃烧，少量氰化物直接在高温下分解，大量氟化物通过烟气进入电厂石灰石‑‑石膏法脱硫系统中与石灰石浆液反应，F‑与浆液中大量过量的Ca2+发生反应生成CaF2沉淀，其他未燃烧的固废经烧结后随煤渣排出，其主要成分为氧化铝、氧化硅等，可以作为水泥的生产原料使用。本发明创造性的解决了大修渣有害固体废弃物的污染问题，在处理有害固体废弃物的同时，实现了废物再利用。
Thermal power generation co-processing technology for overhaul slag of aluminum electrolysis cell
The invention discloses a thermal power generation co-processing technology for overhaul slag of an aluminum electrolysis cell, which comprises the following steps: cooling waste cathode carbon blocks and overhaul slag harmful solid wastes, crushing by a crusher to meet the use fineness requirement of power plant pulverized coal, mixing the pulverized coal and the overhaul slag according to a ratio of 1: (0.002-0.004), burning, directly decomposing a small amount of cyanide at high temperature, enabling large amount of fluoride to enter a limestone-gypsum method desulfurization system of a power plant through flue gas to react with limestone slurry, reacting F<-> with a large amount of excessive Ca<2+> in the slurry to generate CaF2 precipitates, sintering other unburned solid wastes, and then discharging along with coal cinder, wherein the unburned solid wastes mainly comprise aluminum oxide, silicon oxide and the like and can be used as production raw materials of cement. The method creatively solves the problem of pollution caused by the harmful solid waste of the overhaul slag, and realizes waste reutilization while treating the harmful solid waste.
本发明公开了一种铝电解槽大修渣火力发电协同处理技术，将废阴极炭块及大修渣有害固体废弃物冷却后，经破碎机破碎达到发电厂煤粉的使用细度要求，按照煤粉和大修渣1：（0.002～0.004）的比例混合后进行燃烧，少量氰化物直接在高温下分解，大量氟化物通过烟气进入电厂石灰石‑‑石膏法脱硫系统中与石灰石浆液反应，F‑与浆液中大量过量的Ca2+发生反应生成CaF2沉淀，其他未燃烧的固废经烧结后随煤渣排出，其主要成分为氧化铝、氧化硅等，可以作为水泥的生产原料使用。本发明创造性的解决了大修渣有害固体废弃物的污染问题，在处理有害固体废弃物的同时，实现了废物再利用。
Thermal power generation co-processing technology for overhaul slag of aluminum electrolysis cell
一种铝电解槽大修渣火力发电协同处理技术
QIN HAITANG (Autor:in) / ZHANG XIAOHUI (Autor:in)
08.10.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
/
B02C
CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL
,
Brechen, Pulverisieren oder Zerkleinern allgemein
/
C25C
Verfahren für die elektrolytische Herstellung, Wiedergewinnung oder Raffination von Metallen
,
PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS
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