Iron oxide red production device

Abstract

The invention provides an iron oxide red production device which comprises a mixing tank, a reactor, a transforming agent dilution tank, a heat exchanger, a first dryer, an absorption tank, a condenser, a crusher, a first dust remover, a calcining kiln, a sulfuric acid circulating tank, a ball mill, a filtering and washing tank, a second dryer, a third dryer, a filtering and washing liquid storagetank, a second dust remover, a SO3 absorption tank, a sulfuric acid storage tank, an alkali absorption tank and a packaging machine, wherein the mixing tank is connected with the reactor, the first dryer, the crusher, the calcining kiln, the ball mill, the filtering and washing tank, the second dryer and the packaging machine sequentially through a pipeline. The iron oxide red production device provided by the invention has the advantages that the prepared iron oxide red has brighter color and more uniform particle distribution; the perfect 'three wastes' control and cyclic utilization meanscause little impact on the environment; sulfuric acid prepared by absorbing calcination tail gas with concentrated sulfuric acid can be circularly applied to the phase transformation of specularite powder, production cost is low, and the burden of selling byproducts is avoided.

Description

Technical field [0001] The invention belongs to the technical field of chemical synthesis, and particularly relates to a production device for iron oxide red. Background technique [0002] Iron oxide red, the main component is iron trioxide, chemical formula: a-Fe 2 O 3 , Is a non-toxic red or deep red amorphous powder. It is a very important inorganic color pigment with good pigment quality and a wide range of applications. The production of iron oxide red in my country began in the early 1950s. The production process can be divided into two categories: roasting method (dry method) and precipitation method (wet method). At present, 70% of iron oxide red pigments are produced by chemical synthesis, that is, wet process, and 30% are produced from natural minerals or other iron-containing raw materials by crushing or calcining, that is, dry process. [0003] In recent years, research on the dry production of iron oxide red with iron ore (hematite, magnetite, siderite) as raw materia...

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Problems solved by technology

Though in the prior art with the iron ore such as magnetite, hematite, siderite as raw material dry production iron oxide red pigment research has made great progress, it has raw material sources wide, advantages such as low cost, but The following problems still exist so far: the product quality is poor, especially the color hue, which cannot be compared with the wet iron red; when the roasting method is used to produce iron red, waste gas is generated, and improper treatment will cause pollution. When the flue gas is sulfur dioxide and sulfur trioxide When it is a mixture, it is difficult to handle; there are few studies on the dry production of iron oxide red from specularite

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