Method for producing iron oxide red by utilizing titanium dioxide byproduct ferrous sulfate heptahydrate
A technology of ferrous sulfate and red iron oxide, applied in the direction of iron oxide, iron oxide/iron hydroxide, calcium/strontium/barium sulfate, etc. The problems of normal production of titanium dioxide plant and long time consumption of iron oxide red have achieved the effect of low cost, high cost and good product quality
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[0038] Example 1
[0039] The following production steps can be used to produce iron oxide red by-product ferrous sulfate heptahydrate:
[0040] (1) Dissolve the by-product ferrous sulfate heptahydrate obtained from the production of titanium dioxide into an aqueous solution with a concentration of 8% by mass, and filter the solution for use;
[0041] (2) Pass the 8% aqueous solution into the mixing reactor and pass the ammonia gas, so that the 8% aqueous solution reacts with the ammonia gas to produce (NH 4 ) 2 SO 4 And Fe(OH) 2 的mixture;
[0042] (3) Heat the mixed liquid and pump it into a supergravity reactor, and pass in air to make it react to Fe(OH) 3 And (NH 4 ) 2 SO 4 , And solid-liquid separation;
[0043] (4) The Fe(OH) obtained by separation 3 Wash with water until the resulting liquid does not contain ammonium sulfate, and then wash the Fe(OH) 3 Carry out calcination, and finally pulverize and pack to obtain the product;
[0044] (5) The separated (NH 4 ) 2 SO 4 Lime is adde...
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