CN1326821A

CN1326821A - Process for treating silicon slag

Info

Publication number: CN1326821A
Application number: CN 01115132
Authority: CN
Inventors: 柳云珍
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-07-12
Filing date: 2001-07-12
Publication date: 2001-12-19
Anticipated expiration: 2021-07-12
Also published as: CN1128027C

Abstract

Large amount of silicon slag produced in acidolysis and desiliconization steps of zirconium product production is treated through the steps of dewatering, drying, crushing, washing with water, concentration and crystallization or alkali neutralization and settling separation or hydrolysis and settling separation of cleaning liquid to produce zirconum products, separation of silicon slag to obtain zirconite material, drying and crushing silicon slag to produce silicic acid and white carbon black. The said process can change silicon slag as a kind of waste into useful chemical products.

Description

Process for treating silicon slag

Technical field

The invention provides and produce in the zirconium chemical industry series product alkali fusion material after treatment, the treatment process of a large amount of white residues that acidolysis, silica removal produce belongs to the three wastes and handles and utilize technical field.

Background technology

In the process that cooperates other chemical industry, raw mineral materials production zirconium chemical industry series product with zircon sand, after alkali fusion material or sintered material processing, acidifying, silica removal operation can produce a large amount of white residues, these white residues contain and do not extract clean zirconium compounds, acid, unreacted zircon sand, as waste environment are polluted.There is not at present suitable technology that white residue is carried out economical processing and utilization as yet.

Summary of the invention

The purpose of this invention is to provide can be to the process for treating silicon slag of the handling of white residue economy, decontamination and utilization of waste material.

The object of the present invention is achieved like this:

1. with the white residue seasoning or in oven dry below 110 ℃, make its moisture content below 30%: 2. the white residue that dried white residue will be pulverized after 3. will pulverizing becomes the granularity distinct portions by sizing.White residue after the screening is added a certain proportion of water respectively to be cleaned, collect scavenging solution and 4. the white residue of cleaning is further isolated the unreacted zircon sand, use as the low iron of fine, low titanium zircon sand raw material through condensing crystal or with separation of alkaline matter neutralization precipitation or hydrolytic precipitation separation of produced zirconium Chemicals.5. isolated white residue drying dehydration, pulverizing can be produced silicic acid.6. isolated white residue drying dehydration, pulverizing can be produced white carbon black.

White residue drying and dehydrating treatment process has multiple, can seasoning, also can dry.The drying and dehydrating temperature should remain on below 110 ℃, prevents water dissolvable zirconium series compound dehydration becoming water-insoluble zirconium series compound.

It still is white carbon black that white residue is cleaned back production silicic acid, depends on drying temperature.Drying temperature is produced white carbon black more than 120 ℃, produce silicic acid below 120 ℃.

The method of white residue washing lotion hydrolysis generation indissoluble or insoluble zirconium series compound has multiple, as dilution method, sulfuration method etc.Hydrolysate can be a zirconium hydroxide, also can be the zirconates class of slightly water-soluble.

Embodiment

Embodiment 1:

1. will cooperate other chemical industry, raw mineral materials to produce in the process of zirconium chemical industry series product with zircon sand, after alkali fusion material or sintered material were handled, acidifying, silica removal operation produce a large amount of white residue (hereinafter to be referred as white residue) seasoninies to moisture content below 30%.2. the white residue of seasoning is pulverized with pulverizer.3. the white residue of pulverizing is sieved greater than 200 orders, smaller or equal to 200 orders greater than 320 orders, smaller or equal to three parts in 320 orders.4. press water: the weight ratio of white residue=1: 2 is mixed.5. it is centrifugal mixture to be put into whizzer, centrifugation, and wash repeatedly 5 times.6. the primary wash liquor condensing crystal is produced zirconium oxychloride.7. the white residue after will washing is isolated white residue and zircon sand with gravitational separation process, and zircon sand can be used as the low titanium of high-quality, low iron industrial chemicals uses.8. white residue is dried, promptly obtain silicic acid.

Embodiment 2:

1. will cooperate other chemical industry, raw mineral materials to produce in the process of zirconium chemical industry series product with zircon sand, after alkali fusion material or sintered material were handled, acidifying, silica removal operation produce a large amount of white residue (hereinafter to be referred as white residue) seasoninies to moisture content below 30%.2. the drying in the sun white residue is pulverized with pulverizer.3. the white residue of pulverizing is sieved greater than 200 orders, smaller or equal to 200 orders greater than 320 orders, smaller or equal to three parts in 320 orders.4. press water: the weight ratio of white residue=1: 2 is mixed.5. mixture is put into the whizzer centrifugation, and washed repeatedly 5 times.6. the primary wash liquor condensing crystal is produced zirconium oxychloride.7. the white residue after will washing is isolated white residue and zircon sand with gravitational separation process, and zircon sand can be used as the low titanium of high-quality, low iron industrial chemicals uses.8. with white residue in 400 ℃ of oven dry.9. the white residue after will pulverizing is pulverized.10. the white residue selection by winnowing after will pulverizing, satisfactory part is white carbon black, coarse particles returns pulverizing process and pulverizes.

Claims

1, a kind ofly cooperate other chemical industry, raw mineral materials to produce in the process of zirconium chemical industry series product with zircon sand, after alkali fusion material or sintered material processing, the treatment process of a large amount of white residues that acidifying, silica removal operation produce is characterized in that taking following steps: 1. white residue is carried out drying and dehydrating and pulverizing.2. the white residue with drying and dehydrating and pulverizing adds a certain proportion of water cleaning, collects scavenging solution and separates or hydrolytic precipitation separation of produced zirconium chemical industry series product through condensing crystal or with the alkaline chemical neutralization precipitation.3. the white residue of cleaning is further isolated the unreacted zircon sand, use as the zircon sand raw material.4. isolated white residue drying dehydration, pulverizing can be produced silicic acid.5. isolated white residue drying dehydration, pulverizing can be produced white carbon black.

2, as claimed in claim 1ly cooperate other chemical industry, raw mineral materials to produce in the process of zirconium chemical industry series product with zircon sand, after alkali fusion material or sintered material processing, the treatment process of a large amount of white residues that acidifying, silica removal operation produce, the drying and dehydrating treatment process has multiple, it is characterized in that: the 1. middle drying and dehydrating optimum temps of step should remain on below 110 ℃.

3, as claimed in claim 1ly cooperate other chemical industry, raw mineral materials to produce in the process of zirconium chemical industry series product with zircon sand, after alkali fusion material or sintered material processing, the treatment process of a large amount of white residues that acidifying, silica removal operation produce, step 2. method for hydrolysis has multiple, it is characterized in that: hydrolysate can be a zirconium hydroxide, also can be the zirconates class of slightly water-soluble.

4, as claimed in claim 1ly cooperate other chemical industry, raw mineral materials to produce in the process of zirconium chemical industry series product with zircon sand, after alkali fusion material or sintered material processing, the treatment process of a large amount of white residues that acidifying, silica removal operation produce, before the 2. middle washing of step the white residue of drying and dehydrating and pulverizing can be pressed size classification earlier, it is characterized in that: by size classification, the zircon sand raw material of recyclable different fineness also improves purity earlier.

5, as claimed in claim 1ly cooperate other chemical industry, raw mineral materials to produce in the process of zirconium chemical industry series product with zircon sand, after alkali fusion material or sintered material processing, the treatment process of a large amount of white residues that acidifying, silica removal operation produce, drying temperature is depended in the production of silicic acid and white carbon black.It is characterized in that: drying temperature is produced white carbon black more than 120 ℃, produce silicic acid below 120 ℃.