Process and apparatus for preparing magnesium oxide and hydrogen chloride mixed gas by two-stage dynamic calcining of magnesium chloride

A technology of dynamic calcination and magnesium chloride production, applied in chlorine/hydrogen chloride, preparation with chloride, magnesium oxide, etc., can solve the problems of low concentration of hydrochloric acid product, high energy consumption, high cost of equipment anticorrosion, and achieve the effect of advanced technology, mature and reliable

Active Publication Date: 2007-08-01
青海中信国安锂业发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned equipment has the defects of high energy consumption, low concentration of hydrochloric acid products, and high cost of equipment anticorrosion

Method used

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  • Process and apparatus for preparing magnesium oxide and hydrogen chloride mixed gas by two-stage dynamic calcining of magnesium chloride
  • Process and apparatus for preparing magnesium oxide and hydrogen chloride mixed gas by two-stage dynamic calcining of magnesium chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: The process is to use high-temperature hydrogen chloride tail gas as the raw material of hydrated magnesium chloride to carry out one-stage dynamic calcination, also known as drying, and the heated hot magnesium chloride after drying is calcined in hot air at about 600 ° C to thermally decompose magnesium chloride into magnesium oxide hydrogen chloride Tail gas, after gas-solid separation, magnesium oxide products and high-temperature hydrogen chloride tail gas are obtained. The high-temperature hydrogen chloride tail gas is introduced into dry hydrous magnesium chloride raw materials through pipelines, and the cooled hydrogen chloride mixed gas enters the hydrochloric acid production process.

Embodiment 2

[0014] Embodiment 2: The process is basically the same as that of Embodiment 1, except that the heated hot magnesium chloride after drying is calcined in hot air at about 900°C. The subsequent process is the same.

Embodiment 3

[0015] Embodiment three: the embodiment of equipment is as shown in Fig. 2, and T1 in Fig. 2 is the inlet air temperature of calcining tower 4, and the inlet air temperature of this embodiment is set as about 700 ℃, and T2 is the outlet air temperature of calcining tower 4 , the air outlet temperature of this embodiment is about 500 ° C, and the rest of the components have been described in the description of the drawings, and will not be repeated here.

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Abstract

The invention discloses a making technique and equipment of magnesia and hydrogen chloride through two-grade dynamic sintering magnesium chloride, which comprises the following steps: drying tail gas of high-temperature hydrogen chloride with water magnesium chloride; sintering magnesium chloride under 600-900 deg.c to decompose magnesium chloride into magnesia and hydrogen chloride; separating solid from liquid; drying; cooling; obtaining the product; making alcaine. The mated equipment is composed of hot wind device, sintering tower, cyclone separator 1, flow drier, gas-solid separating device, raw material adder, seal-phased transmitting pipe, blower and induced fan.

Description

1. Technical field: [0001] The invention belongs to the field of inorganic salt chemical equipment and chemical technology, and provides equipment and process conditions for producing mixed gas of magnesium oxide and hydrogen chloride by dynamically calcining magnesium chloride at two poles. 2. Background technology: [0002] The mixed gas of magnesium oxide and hydrogen chloride can be produced by high-temperature pyrolysis (calcination) technology using magnesium chloride as raw material, and hydrochloric acid can be obtained by treating the mixed gas containing hydrogen chloride with absorption equipment. Calcining magnesium chloride to produce mixed gas of magnesium oxide and hydrogen chloride, there are two kinds of processes and equipment that have been in operation at home and abroad: [0003] Abroad: Israel uses saturated magnesium chloride solution as raw material to obtain mixed gas of magnesium oxide and hydrogen chloride by spray pyrolysis method. The main equipm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/06C01B7/03
Inventor 杨建元高小平魏新俊李陇岗
Owner 青海中信国安锂业发展有限公司
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