阅读说明：本技术 一种基于工业废碱渣的再生制造粉笔 (Regenerated chalk manufactured based on industrial waste alkaline residues ) 是由 江冰 冯研 张欣悦 罗正繁 王悦石 周亚凯 崔巍 卞馨梓 陈高峰 周俊德 吉睿琪 于 2020-08-17 设计创作，主要内容包括：本发明涉及无机化学材料环保文教用品技术领域,公开了一种基于工业废碱渣的再生制造粉笔,所述粉笔主要的原料成分包括：熟石膏40~60g,碳酸钙40~80g,碱渣70~110g,聚乙烯醇7~12g,水150-220g,铁素体粉末10~15g,阿拉伯胶12~18g。溶解聚乙烯醇；将碱渣风干磨粉或在120℃条件下干燥3小时,取出磨粉；将石膏粉、聚乙烯醇胶液、碳酸钙、碱渣粉、铁素体粉末溶于水中搅拌均匀并灌注成型。与现有技术相比,本发明以工业废弃物碱渣作为部分碳酸钙替代物,加入石膏粉、聚乙烯醇等配料加水拌合成型,在降低粉笔生产物料成本基础上回收利用碱厂废渣,起到节能减排的良好社会效益。(The invention relates to the technical field of inorganic chemical material environment-friendly cultural and educational supplies, and discloses a chalk manufactured based on regeneration of industrial waste caustic sludge, which mainly comprises the following raw materials: 40-60 g of calcined gypsum, 40-80 g of calcium carbonate, 70-110 g of alkaline residue, 7-12 g of polyvinyl alcohol, 220g of water, 10-15 g of ferrite powder and 12-18 g of Arabic gum. Dissolving polyvinyl alcohol; air-drying the alkaline residue, grinding into powder or drying at 120 deg.C for 3 hr, taking out, and grinding into powder; dissolving gypsum powder, polyvinyl alcohol glue solution, calcium carbonate, alkali slag powder and ferrite powder in water, uniformly stirring, and filling for molding. Compared with the prior art, the invention takes the industrial waste alkali residues as partial calcium carbonate substitutes, adds the gypsum powder, the polyvinyl alcohol and other ingredients, adds water, mixes and forms, recycles the alkali factory waste residues on the basis of reducing the cost of chalk production materials, and plays a role in energy conservation and emission reduction.)

1. The chalk manufactured based on the regeneration of the industrial waste caustic sludge is characterized in that the main raw material components of the chalk comprise: 40-60 g of calcined gypsum, 40-80 g of calcium carbonate, 70-110 g of alkaline residue, 7-12 g of polyvinyl alcohol, 220g of water, 10-15 g of ferrite powder and 12-18 g of Arabic gum.

2. The chalk manufactured based on the regeneration of the industrial waste caustic sludge as claimed in claim 1, wherein the main raw material components of the chalk comprise: 45-55 g of calcined gypsum, 50-70 g of calcium carbonate, 80-100 g of alkaline residue, 8-10 g of polyvinyl alcohol, 220g of water 150, 12-14 g of ferrite powder and 14-17 g of Arabic gum.

3. The chalk manufactured by regeneration based on industrial waste alkaline residue as claimed in claim 1 or 2, wherein the total amount of the calcium carbonate and the alkaline residue is 150 g.

4. The chalk manufactured based on the regeneration of the industrial waste caustic sludge as claimed in claim 3, wherein the main raw material components of the chalk comprise: 50g of calcined gypsum, 40g of calcium carbonate, 110g of caustic sludge, 9g of polyvinyl alcohol, 150g of water, 13g of ferrite powder and 16g of Arabic gum.

5. The chalk manufactured based on the regeneration of the industrial waste caustic sludge as claimed in claim 3, wherein the main raw material components of the chalk comprise: 50g of calcined gypsum, 80g of calcium carbonate, 70g of caustic sludge, 9g of polyvinyl alcohol, 220g of water, 13g of ferrite powder and 16g of Arabic gum.

6. The chalk manufactured based on the regeneration of the industrial waste caustic sludge as claimed in claim 3, wherein the main raw material components of the chalk comprise: 50g of calcined gypsum, 60g of calcium carbonate, 90g of caustic sludge, 9g of polyvinyl alcohol, 200g of water, 13g of ferrite powder and 16g of Arabic gum.

Technical Field

The invention relates to the technical field of inorganic chemical material environment-friendly cultural and educational supplies, in particular to chalk manufactured based on regeneration of industrial waste caustic sludge.

Background

In recent years, along with the continuous development of the education cause of China, the using amount of chalks is greatly increased, and the chalks play a very important role in the whole education product. At present, the chalk used in China is two types of ordinary chalk dust-free chalk, and the main components of the chalk are calcium carbonate (limestone) and calcium sulfate (gypsum) or a small amount of calcium chloride. The chalk is used as a teaching consumable material with a long history, the main material source for preparing the chalk is limestone or industrial chemical product CaCO3 generally, and the chalk has a certain material cost.

On the other hand, the caustic sludge is formed by depositing and accumulating the waste liquid discharged in the production process of producing the soda by the ammonia-soda process, and the main components of the caustic sludge comprise CaCO3, CaCl2, a small amount of oxides in limestone, impurities which are not removed in the salt water and the like. According to statistics, the factory produces 1t of pureAlkali, discharge about 10m³The waste liquid of (2), wherein the waste residue contains 300-600 kg. The conventional treatment mode of the waste alkali residues in the salt chemical industry is ground accumulation, so that a large amount of alkali residues are accumulated around the alkali factory in China, and a piece of 'white sea' is formed after the alkali residues are deposited, thereby causing pollution to the surrounding sea area. With the rapid development of regional economic construction and the enhancement of environmental consciousness, the conventional method for treating alkaline residue adopts a suspended stable liquid circulating discharge mode to recharge the dissolved water into a brine-collecting waste salt cavity which is hundreds of meters deep from the bottom, and the method consumes a large amount of treatment cost every year and simultaneously cannot predict long-term environmental pollution.

Disclosure of Invention

The purpose of the invention is as follows: aiming at the problems in the prior art, the invention provides a chalk manufactured based on the regeneration of industrial waste alkaline residues, which is produced by taking the industrial waste alkaline residues as partial calcium carbonate substitutes, adding gypsum powder and polyvinyl alcohol as ingredients, adding water, mixing and molding. On the basis of reducing the cost of chalk production materials, the waste residue of an alkali factory is recycled, and good social benefits of energy conservation and emission reduction are achieved.

The technical scheme is as follows: the invention provides a chalk manufactured based on regeneration of industrial waste alkaline residues, which mainly comprises the following raw material components: 40-60 g of calcined gypsum, 40-80 g of calcium carbonate, 70-110 g of alkaline residue, 7-12 g of polyvinyl alcohol, 220g of water, 10-15 g of ferrite powder and 12-18 g of Arabic gum.

Further, the main raw material components of the chalk comprise: 45-55 g of calcined gypsum, 50-70 g of calcium carbonate, 80-100 g of alkaline residue, 8-10 g of polyvinyl alcohol, 220g of water 150, 12-14 g of ferrite powder and 14-17 g of Arabic gum.

Further, the total amount of the calcium carbonate and the caustic sludge is 150 g.

Further, the main raw material components of the chalk comprise: 50g of calcined gypsum, 40g of calcium carbonate, 110g of caustic sludge, 9g of polyvinyl alcohol, 150g of water, 13g of ferrite powder and 16g of Arabic gum.

Further, the main raw material components of the chalk comprise: 50g of calcined gypsum, 80g of calcium carbonate, 70g of caustic sludge, 9g of polyvinyl alcohol, 220g of water, 13g of ferrite powder and 16g of Arabic gum.

Further, the main raw material components of the chalk comprise: 50g of calcined gypsum, 60g of calcium carbonate, 90g of caustic sludge, 9g of polyvinyl alcohol, 200g of water, 13g of ferrite powder and 16g of Arabic gum.

Has the advantages that:

the invention utilizes the industrial waste alkaline residue produced by an alkaline plant, takes the alkaline residue as a partial calcium carbonate substitute by utilizing the waste, adds the ingredients such as gypsum powder, polyethylene and the like, adds water, mixes and molds to produce the environment-friendly teaching chalk. On the basis of reducing the cost of chalk production materials, the waste residue of an alkali factory is recycled, and good social benefits of energy conservation and emission reduction are achieved.

Drawings

FIG. 1 is a graph showing the change rule of the sample loss rate with the mixture ratio in the embodiment of the invention;

FIG. 2 shows the change rule of the breaking strength of the sample with the proportion in the embodiment of the invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

The invention mainly aims to solve the problems that in the prior art, a large amount of alkaline residues are accumulated around an alkaline plant and form a piece of 'white sea' after deposition, so that pollution to surrounding sea areas is caused, and the like. On the basis of reducing the cost of chalk production materials, the waste residue of an alkali factory is recycled, and good social benefits of energy conservation and emission reduction are achieved. The following description will be made with reference to specific examples.