Method for preparing active mineral admixture through suspension roasting of industrial solid waste

A technology of active minerals and industrial solid waste, applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems of no comprehensive utilization method, human health hazards, low activity of vanadium slag, etc. The effect of large, small environmental pollution and low calcination temperature

Pending Publication Date: 2022-06-03
洛阳申特工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, under the existing vanadium extraction process, the activity of vanadium slag is low, and the utilization rate is low. There is no reasonable and economical comprehensive utilization method. A large amount of stacking not only occupies land, but also contains soluble Cr6+, V5+, etc. in vanadium slag. Hazard to human health Great, seriously pollute the environment

Method used

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  • Method for preparing active mineral admixture through suspension roasting of industrial solid waste

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The direction of material flow during production: vanadium slag, stone coal and limestone are mixed evenly according to the proportion and then sent to the first preheating pipe by elevator 1, and the mixture in the first preheating pipe enters P1 suspension preheater 2 in turn with the hot air flow , P2 suspension preheater 3, P3 suspension preheater 4, complete the preheating, decomposition and 10% solid phase reaction of the mixture; The pipeline of the discharge port enters the roasting furnace 5 for sintering. After the mixture is sintered in the solid phase of 70-80% in the roasting furnace 5, the sintered material enters the gas-solid separator 6 with the hot air flow through the pipeline for gas-solid separation. , the gas phase after gas-solid separation is extracted by the high-temperature fan 13 through the pipeline and then sent to the waste gas treatment system for processing. The solid-phase reaction is completed in the rotary reactor 7, and the active min...

Embodiment 2

[0025]A conveying pump 11 is arranged below the discharge port of the heat exchanger 10, a pipeline is arranged between the conveying pump 11 and the discharge port of the heat exchanger 10, a roots blower 12 is arranged on one side of the conveying pump 11, and the roots blower 12 and the conveying pump 11 A pipeline is set between the air inlets of the heat exchanger 10, a C1 cooler 9 is set above the feed opening of the heat exchanger 10, a pipeline is set between the discharge opening of the C1 cooler 9 and the feed opening of the heat exchanger 10, and the C1 cooler 9 A third cooling pipe is arranged between the feed inlet and the cold air outlet of the heat exchanger 10, a C2 cooler 8 is arranged on the upper side of the C1 cooler 9, and a pipe is arranged between the outlet of the C2 cooler 8 and the third cooling pipe , a second cooling pipe is set between the air outlet of the C1 cooler 9 and the air inlet of the C2 cooler 8, the roasting furnace 5 is set above the C2 ...

Embodiment 3

[0028] The proportions of the vanadium slag, stone coal and limestone are: 60-70%, 13-15%, 15-25%, and the calcination temperature is 900-1100°C.

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Abstract

The invention discloses a method for preparing an active mineral admixture through suspension roasting of industrial solid waste. During production, the material flow trend is as follows: vanadium slag, stone coal and limestone are uniformly mixed and then sequentially enter a P1 suspension preheater, a P2 suspension preheater and a P3 suspension preheater through an elevator for preheating, decomposition and solid-phase reaction; the mixed material enters a roasting furnace to be sintered, the sintered material enters a gas-solid separator to generate an active mineral admixture, the active mineral admixture sequentially enters a cooler C2, a cooler C1 and a heat exchanger to be further subjected to heat exchange, and the active mineral admixture is conveyed to a finished product warehouse; during production, the airflow trend is as follows: a high-temperature fan generates running airflow, cold air in a heat exchanger sequentially enters a C1 cooler and a C2 cooler, hot air enters a roasting furnace, and hot flue gas of the roasting furnace sequentially enters a gas-solid separator, a P3 suspension preheater, a P2 suspension preheater and a P1 suspension preheater; the invention has the advantages of energy conservation, consumption reduction, low calcination temperature, good stability of the high-temperature sintered mineral admixture, less formula, simple process and small environmental pollution.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a method for preparing active mineral admixture by suspending and roasting industrial solid waste. Background technique [0002] my country adds about 10 billion tons of industrial solid waste every year, and the total amount of historical stockpiles is as high as 60 billion to 70 billion tons. The bulk solid waste associated with industrial production contains harmful components such as heavy metals, which cannot be treated in a timely and efficient manner for a long time. The pressure on the environment and resources will continue to increase. Therefore, large-scale, high-quality treatment and utilization of bulk solid waste is imperative. [0003] At present, under the existing vanadium extraction process, vanadium slag has low activity and low utilization rate, and there is no reasonable and economical comprehensive utilization method. A large number of stacking...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/04C04B18/14
CPCC04B20/04C04B18/144Y02W30/91
Inventor 李利平潘玉峰李嘉隆陈辉崔艳华董雷亭何伟峰代家聚
Owner 洛阳申特工程技术有限公司
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