CN101544406B

CN101544406B - Method for producing red iron oxide pigment

Info

Publication number: CN101544406B
Application number: CN2009100982860A
Authority: CN
Inventors: 沈恒冠; 袁巧平; 韩道洋
Original assignee: Ningbo Coboto Cobalt & Nickel Co Ltd
Current assignee: NINGBO JINHE LITHIUM BATTERY MATERIAL CO., LTD.
Priority date: 2009-05-05
Filing date: 2009-05-05
Publication date: 2011-03-30
Anticipated expiration: 2029-05-05
Also published as: CN101544406A

Abstract

The invention relates to a method for producing a red iron oxide pigment. The method has the main points: adding water into waste iron vitriol dregs for coarse washing, dewatering the waste iron vitriol dregs with a frame filter press, placing the dewatered waste iron vitriol dregs in a drying oven for drying at 120 to 150 DEG C for 3 to 5 hours; and cooling the iron vitriol dregs, crushing the cooled iron vitriol dregs and filling the crushed iron vitriol dregs in a porcelain boat, placing the crushed iron vitriol dregs in a high temperature calciner for calcination treatment at a temperature of 550 to 650 DEG C for 2 to 4 hours, absorbing furnace tail gas SO3 with 60 percent sulfuric acid to produce more than or equal to 98 percent concentrated sulfuric acid, and absorbing residual air after absorption with sodium hudroxide. Powder formed by calcining the iron vitriol dregs is washed, and the temperature is controlled to be 60 to 90 DEG C; after being washed, the powder is dewateredby the frame filter press and then enters the drying oven to be dried at a low temperature of 120 to 150 DEG C for 2 to 3 hours; and the dried powder is passed through a 150 mesh sieve to obtain a finished product of the red iron oxide pigment. The method emphasizes environmental protection in a production process and has the characteristics of low energy consumption, short production flow, easy mastered process, stable product quality, change of waste into valuable, and the like.

Description

The production method of ferric oxide red colorant

Technical field

The present invention relates to the production method of Chemicals, is a kind of by the method for useless iron vitriol slag as the raw material production ferric oxide red colorant.

Background technology

Red iron oxide is widely used in azulejo encaustic tile, colored cement, building coating and the industries such as paint, printing ink.The high-purity iron oxide red production of China is raw material with the high price molysite of high-purity soft steel thin slice or finished product mostly at present, and this raw material is collected difficulty, and it is indefinite to originate, and price is more expensive, and quantity is considerably less.Also have the partial oxidation iron-oxide red production method be utilize the iron-contained industrial waste residue, burn slag, iron mud etc. is as raw material, treatment process such as these methods mostly need be molten through peracid, magnetic separation, Production Flow Chart is long, the energy consumption height.

The authorization CN1005917B of Chinese patent literature publication, application number 86100780 has disclosed a kind of " a kind of manufacture method of oxidation two iron oxide red pigments, ".It is to utilize the industrial burned dregs of trioxygen-containingization two iron more than 70%, with sulfuric acid reaction, generates ferric sulphate, obtains the secondary recycling ferric oxide through calcination, again through pulverizing, rinsing, removes water soluble salt, makes ferric oxide red colorant.It is that " this method has found low price raw material for obtaining the high ferro calcination iron oxide red of high rustless property that the oneself of this part patent comments.Its cost is lower than wet method iron oxide red and ferrous iron oxide red, and rustless property is all high, and have high temperature resistant, anti-characteristics of tanning by the sun.Suitability for industrialized production, abundant raw material, cost is low, the quality product height is widely used in the rust-proofing primer of boats and ships and hardware, the filled coloring agent of pottery, rubber, plastics and whitewashing of heritage buildings ".

The Granted publication CN1022634C of Chinese patent literature publication and for example, ZL patent No. 90104157B has disclosed a kind of " a kind of production method of ferric oxide red colorant ".The oneself of this part patent comments and is that " this production method is to utilize natural jacutinga stone; the ferric oxide red colorant that obtains through pulverizing, ball milling, classification, ore dressing, classified filtering, oven dry, calcining; this production method technical process is short; raw material only needs natural rhombohedral iron ore stone; and raw material sources are abundant; whole process of production need not passed through any chemical reaction process, compare with the ferric oxide red colorant of existing synthetic legal system trioxygen-containingization two iron more than 94%, cost has reduced by 900～1000 yuan/ton ".

The Granted publication CN1137941C of Chinese patent literature publication for another example, the ZL patent No. 00131922.1 has disclosed a kind of " producing the painted method with ferric oxide red colorant of pyroceramic by the iron-contained industrial waste residue ".It is " to contain Fe that the oneself of this part patent comments ₂O ₃Industrial residue more than 38% is a main raw material, adds the sulfuric acid curing reaction, and water comes together and filters, precipitin reaction, and deterioration by oxidation, washing and filtering, oven dry, calcining is pulverized, and gets ferric oxide red colorant low-cost, high stability.It is painted that made red iron oxide both can be used for the pyroceramic base substrate, and it is painted to can be used for high melting glaze again, and firing temperature can be not less than 1200 ℃, is chromatic effect and stability and all reaches even slightly be better than industrial mixed acid process red iron oxide, obviously is better than industrial sulphuric acid method red iron oxide.This method can be utilized multiple iron-contained industrial waste residue, turns waste into wealth "

The technical scheme of above-mentioned disclosure except that the oneself comment advantage, weak point is that energy consumption is higher, the production cycle is longer, technology is comparatively complicated, production cost is higher relatively.

Summary of the invention

For overcoming the deficiency of above-mentioned existence, the present invention seeks to provide a kind of production method of ferric oxide red colorant to this area, make it can solve that existing like product energy consumption is higher, the production cycle is longer, technology is comparatively complicated, the relative technical problems of high problem of production cost.The objective of the invention is to be achieved through the following technical solutions.

A kind of production method of ferric oxide red colorant, the key points in design of this method is:

1, the iron vitriol slag that will give up adds water and slightly washes, and slightly washes finger washing roughly, dewaters by plate and frame(type)filter press through the useless iron vitriol slag of washing, and its water content is reduced to below 40%, and waste water uses through the settling tank cycle of treatment;

2, water content is lower than 40% useless iron vitriol slag and enters drying oven, dries 3～5 hours time of drying under 120 ℃～150 ℃ low temperature;

3, the useless iron vitriol slag of drying is pulverized by pulverizer after overcooling, and the porcelain boat of packing into of the useless iron vitriol slag after the pulverizing, described porcelain boat are the containers of the useless iron vitriol slag of dress;

4, pack into the useless iron vitriol slag of porcelain boat enters high-temperature calcination stove calcination processing, satisfies the requirement of its chemical reaction, and a step decomposition reaction directly takes place, and chemical equation is: Na ₂Fe ₆(SO ₄) ₄(OH) ₁₂=Na ₂SO ₄+ 3SO ₃↑+6H ₂O ↑+3Fe ₂O ₃, K ₂Fe ₆(SO ₄) ₄(OH) ₁₂=K ₂SO ₄+ 3SO ₃↑+6H ₂O ↑+3Fe ₂O ₃, calcining temperature is 550～650 ℃, calcination time 2～4 hours, stove tail waste gas SO ₃Use 60% sulfuric acid absorption to produce 〉=98% the vitriol oil, residual air absorbs with caustic soda;

5, change through the incinerating iron vitriol slag, the useless iron vitriol slag of porcelain boat of packing into carries out fine purifiation through being sintered into powder, dewater by plate and frame(type)filter press behind the fine purifiation, temperature is controlled at 60～90 ℃, enter drying oven then, dry under 120 ℃～150 ℃ low temperature, the time is 2～3 hours, makes the ferric oxide red colorant finished product through 150 mesh sieves again.

When being to calcine, the temperature of should strict control formulating, and the removal of impurity during washing.

The present invention pays attention to environmental protection in production process, and it is lower to possess energy consumption, and Production Flow Chart is shorter, and technology is easy to grasp, constant product quality, and characteristic such as turn waste into wealth.

Description of drawings

Fig. 1 is a process flow diagram of the present invention.

Embodiment

Embodiment is example with the actual production.At 10m ³The plastics reactor in inject about 5m ³Water, open to stir, drop into the iron vitriol slag 1500Kg after the deironing in the cobalt chloride wet smelting process, PH is 5～6 in control, after half an hour iron vitriol slag is dewatered by plate and frame(type)filter press, and water-content is controlled at below 40%.Oven dry is laid the liquefied gas delivery system by the drying alley kiln drying in the tunnel furnace; The porcelain boat of then the iron vitriol slag filter cake being packed into is sent into drying alley kiln inner drying 3～5 hours, and temperature is controlled at 120～150 ℃.The scum cooling in the mullite alms bowl of packing into after the pulverizer pulverizing, is sent in the calcining furnace and was calcined 2～4 hours, and calcining temperature is controlled at 550～650 ℃.Powder after the calcining drops in the plastics reactor, water fine purifiation under 60～90 ℃ condition is filter cake by the plate and frame(type)filter press dehydration after stirring half an hour, the filter cake porcelain boat of packing into, under 120 ℃～150 ℃ low temperature, toasted 2～3 hours, cross 150 mesh sieves and make the red iron oxide finished product.

Claims

1. the production method of a ferric oxide red colorant the method is characterized in that:

At 10m ³The plastics reactor in inject 5m ³Water, open to stir, drop into the ferrovanadium slag 1500Kg after the deironing in the cobalt chloride wet smelting process, pH is 5～6 in control, after half an hour the ferrovanadium slag is dewatered by plate and frame(type)filter press, and water-content is controlled at below 40%;

Oven dry is laid the liquefied gas delivery system by the drying alley kiln drying in the tunnel furnace, the porcelain boat of then ferrovanadium slag filter cake being packed into is sent into drying alley kiln inner drying 3～5 hours, and temperature is controlled at 120～150 ℃;

The scum cooling, in the mullite alms bowl of packing into after the pulverizer pulverizing, send in the calcining furnace and calcined 2～4 hours, calcining temperature is controlled at 550 ℃～650 ℃, and the powder after the calcining drops in the plastics reactor, water fine purifiation under 60 ℃～90 ℃ condition, be filter cake by the plate and frame(type)filter press dehydration after stirring half an hour, the filter cake porcelain boat of packing into toasted 2～3 hours under 120 ℃～150 ℃ low temperature, crossed 150 mesh sieves and made the red iron oxide finished product.