CN1022634C - Production process for iron oxide red pigment - Google Patents

Abstract

The present invention relates to a method for producing iron oxide red pigments. Natural rich hematite ores are made into iron oxide red pigments by crushing, ball milling, fractionation, ore dressing, fractionation filtering, drying and calcining. The production method has a short technological process, only the natural hematite ores are used as raw materials, and the raw material sources are rich. In the whole production procedure, no chemical reaction procedure needs carrying out. Compared with the existing artificial synthesis method used for preparing iron oxide red pigments which comprise more than 94% of ferric oxide, the cost is reduced by 900 yuan to 1000 yuan per ton. Therefore, high quality iron oxide red pigments can be produced by the method, and besides, good economic benefits can be obtained.

Description

Production process for iron oxide red pigment

The invention belongs to a kind of method of utilizing natural rhombohedral iron ore stone to produce ferric oxide red colorant.

In the prior art, generally make ferric oxide red colorant (seeing " pigment technology " 186-194 page or leaf) wet method oxygenerating iron oxide red pigment with wet method or dry method, concrete production method is divided into three kinds again: vitriol wet method iron oxide red, nitrate wet method iron oxide red, nitration mixture salt wet method iron oxide red.These three kinds of method production processes are basic identical, all are to make crystal seed earlier, and second oxidation makes product then, and different is exactly the raw material difference, temperature, time control difference in the making processes, and chemical reaction is handled different.Adopt the method for preparing red iron oxide, wherein crystal seed produce extremely important, crystal seed condition in process of production, as air capacity, reaction medium pH value, temperature, the influence of impurity etc. has just determined the quality of following red iron oxide, different all differences that will cause the crystal growth process in second oxidation iron oxide red forming process of the size of crystal seed and quantity, the difference of crystal seed quantity just means the difference of nucleus of crystal number, the difference of seed concentration in forming process just, the nucleus number is many more, and the speed of crystalline growth is slow more, from the macroscopic result be exactly the second oxidation process the ripe speed of iron oxide red slow more, otherwise then opposite.So the necessary strict control of the various conditions of crystal seed in the process of giving birth to, and in existing production process, often do not reach requirement owing to a certain index, cause the quality and the output that have influence on red iron oxide.Another kind method is that dry method claims the green vitriol legal system to get red iron oxide again.This method is that the ferrous sulfate that contains seven water crystallizations is sloughed most of crystal water through preheating.Under 250-300 ℃, make green vitriol become a hydration green vitriol, after grinding, under 700-800 ℃, calcine and iron oxide red, carry out the aftertreatment of pigment then, through the washing remove water-soluble salt, drying and crushing is a finished product again.Adopt above synthesis method to prepare red iron oxide, its advantage is the red iron oxide quality height of preparation, but severe reaction conditions, technical process is long, and technical difficulty is big, and the reaction process complexity is merely hit and oxidization time just needs 6-7 days, and equipment is not general, and investment is big, and cost is very high.Therefore people are seeking always that a kind of raw material sources are abundant, cost is low, production technique is simple, preparation is easy, the ideal red iron oxide, and still people prepare in synthesis method to have breakthrough aspect the red iron oxide so far.Provided a kind of technology of utilizing the iron content waste liquid to produce products such as red iron oxide as publication CN85105994A, this technology is compared with wet method oxygenerating iron oxide red, in and oxidization time shorten, shorten to about 15 hours by 6-7 days, cost has reduced about 100 yuan/ton.But the price that has just determined product with required various processing condition of synthesis method oxygenerating iron oxide red itself and equipment can not reduce a lot, prepare red iron oxide in addition in this way and also exist the insufficient problem of raw material sources, do not satisfy social a large amount of needs far away, in addition, also have and utilize the natural rhombohedral iron ore red iron oxide that is equipped with made of stones, but can not produce the higher ferric oxide red colorant of trioxygen-containingization two iron so far, and the coloured light problem of red iron oxide also can't resolve, the product that makes does not meet national standard, and therefore the precedent of success is not arranged so far.

Purpose of the present invention is exactly the deficiency at existing preparation red iron oxide, and a kind of sufficient raw is provided, and technology is simple, and cost reduces significantly, and constant product quality, the production method of the satisfactory a kind of sinopia of technical indicator.

Crucial design of the present invention is: select for use heavy color through artificial screening, jacutinga stone of high grade as basic material, do not need any auxiliary material and chemical reaction process, only with conventional crushing mechanism processing, be finely ground to powder, classified ore dressing, oven dry calcining qualified ferric oxide red colorant.

Fig. 1 is a production red iron oxide whole process flow block diagram.

Details are as follows below in conjunction with Fig. 1 the present invention to be produced the method for ferric oxide red colorant:

Earlier with former hematite process artificial screening, select heavy color, brush stone of high grade, through the disintegrating machine coarse crushing to the 1-3cm fritter, subsequently the fritter of 1-3cm is crushed to again the thick end of 0.1-0.3mm through disintegrating machine, order is sent thick end into the ball mill fine grinding, be milled to the powder that granularity is 63-90um, but can not make the powder size of wearing into all reach 63-90um in the actual production, need classified machine classification, be granularity that the breeze of 63-90um is selected, and the breeze of other granularity is again sent ball mill back to again and is refaced. Why single choice goes out the breeze that granularity is 63-90um, be because select of high grade, the brush stone of heavy color, through verification experimental verification will reach and contains ferric oxide content more than 94%, must be ground into granularity through ball mill Be the powder of 63-90um, the powder of the 63-90um that tells is carried out with the method for ore dressing selected, select essence, in, mine tailing, in, mine tailing is combined, with the concentrate slurries chosen and be combined in, the mine tailing slurries send into respectively filter press, filtrate becomes piece. Order is dried the filter block that presses under 80-150 ℃ temperature, the time needs 5-8 hour, and the filter block that oven dry is good is sent into the reverberatory furnace high-temperature calcination, needs 800-1000 ℃ of temperature, time 1-3 hour, reaches till the dark bay colored light. Like this with regard to solved that people for a long time want to utilize natural red ore deposit iron ore production iron oxide red always and the coloured light problem that can't resolve, and make coloured light reach standard coloured light, the iron oxide red piece that is sintered into, through pulverize, packing qualified iron oxide red product. Like this, the finished product that makes with concentrate can reach H102 primes standard, in, the finished product that makes of mine tailing can reach H103 primes standard.

Embodiments of the invention, former rhombohedral iron ore stone is through the artificial hand selection, filter out heavy color grade for containing more than the TFe57%, ferric oxide is 10 tons in a natural jacutinga stone more than 79%, send into jaw crusher, be crushed to the fritter of 1-3cm, continuously fritter is sent into hammer mill, be crushed to the thick end of 0.1-0.3mm, again lattice-type ball mill is sent at the thick end of 0.1-0.3mm, be finely ground to the powder that granularity is 63-90um, it is selected that the powder of the 63-90um that tells is sent into slime table, passes through cradle vibrate, the water flushing, the breeze of trioxygen-containingization two iron more than 94% shakes the bed surface top, flow in the susceptor with water, the concentrate slurries of choosing and remaining in, the mine tailing slurries are sent into rubber plate-and-frame filter press filtrate and are become piece.The filter block that presses is put into the caliduct hole and goes up oven dry, need 80-150 ℃ of temperature, time needs 5-8 hour, again the good filter block of oven dry is sent into the reverberatory furnace high-temperature calcination, need 800-1000 ℃ of temperature, time 1-3 hour, up to reach dark bay coloured light is arranged till, the red iron oxide piece that is sintered into is again through pulverizing, packing, qualified red iron oxide product, produce the ferric oxide red colorant of 2.5-3 tondal at last, the ferric oxide red colorant of the standard that reaches the H103 first grade of 6.7-7 ton to H102 first grade standard.

Synthetic method and natural jacutinga stone working system are produced the red iron oxide norm quota of consumption contrast table of one ton of trioxygen-containingization two iron more than 94%: (table is seen the literary composition back)

Can find out by form, produce the red iron oxide of one ton of trioxygen-containingization two iron more than 94%, the synthetic method need consume 1100 kilograms on iron sheet, 400 kilograms in sulfuric acid, 300 kilograms of liquid caustic soda, 5 kilograms of phosphoric acid, 4000 kilograms in coal, 40 tons in water, electricity 750 degree, add labour cost, cost needs 1900-2000 unit/ton, and natural jacutinga stone production red iron oxide method need consume 3 tons in jacutinga stone, 2000 kilograms in coal, 10 tons in water, the electricity 280 the degree, produce the red iron oxide of 1 ton of trioxygen-containing iron more than 94% after, remaining ferric oxide content can reach more than 75%, this part breeze can also reach H103 first grade standard after making finished product, adds manually to produce the red iron oxide of trioxygen-containingization two iron more than 94%, per ton cost is 900-1000 unit/ton (do not comprise and contain the ferric oxide red colorant that the ferric oxide more than 75% is made), from cost, the method for natural rhombohedral iron ore stone production red iron oxide can not only be saved big content of starting materials and water, electricity, and can obtain great economic benefit.

Below be the quality contrast table that is equipped with red iron oxide with natural rhombohedral iron ore stone production red iron oxide and synthetic legal system: (with reference to " 600 kinds of chemical goods " the 835th page) (table is seen the literary composition back)

By form as can be seen, utilize natural jacutinga stone production red iron oxide, its first grade can reach national H102 first grade standard, and its seconds can reach the standard of H103 first grade.

In a word, the present invention utilizes the method for natural rhombohedral iron ore stone production red iron oxide.Technical process is short, raw material only needs natural jacutinga stone, and raw material sources are abundant, and whole process of production is simple, does not have chemical reaction process, only by standard machinery processing with calcine two step production links and compare with the method for existing synthetic red iron oxide, cost has reduced 900-1000 unit/ton, therefore utilizes natural rhombohedral iron ore stone production red iron oxide, not only steady quality, technical indicator meets the requirements, and economic benefit and social benefit have improved a step greatly.

Consumption iron sheet sulfuric acid liquid caustic soda phosphoric acid coal water power rhombohedral iron ore

Production method (kg) is (kg) (kg) (kg) ton degree (ton) (kg)

Synthetic 110 ℃ 400 300 5 4,000 40 750 of artificial process

Natural rhombohedral iron ore 2,000 10 280 3

Stone

Claims (1)

1, a kind of method of utilizing natural rhombohedral iron ore stone to produce ferric oxide red colorant, it is characterized in that natural jacutinga stone through pulverizing, ball milling, classification, ore dressing, classified filtering, oven dry, the ferric oxide red colorant of calcining and obtaining, to weigh color, natural jacutinga stone of high grade is sent into the thick end that the pulverizer continuous crushing becomes 0.1-0.3mm, ball mill is sent at thick end, be finely ground to the powder that granularity is 63-90um, selected the powder of 63-90um with the method for ore dressing, the essence of selecting, in, mine tailing slurries press filtration respectively become piece, with filter block under 80-150 ℃ temperature, dried 5-8 hour, carry out high-temperature calcination after the oven dry, need 800-1000 ℃ of temperature, time 1-3 hour, then through pulverizing the ferric oxide red colorant that promptly obtains standard.

Images