今日央行公开市场将进行500亿元7天期逆回购操作，400亿元14天期逆回购操作，300亿元28天期逆回购操作，央行公开市场今日将有100亿逆回购到期。其实今年除了经济回暖外，资金流是刺激铅板市场的一个主要因素，之前的文章我们也提到过对外投资的下滑情况，今年大批的资金涌向国内市场，使得大宗商品市场活跃了起来，加上今年央行在操作上明显放宽松了很多，市场资金链相对充足了许多。至于本周铅板市场能否维持现状还有待考证，下旬走势各方观点呈两极分化，部分认为钢价上涨空间不大，震荡回调会是下旬的主旋律，也有人拿出地条钢来说事认为下旬铅板价格还是会偏强，究竟趋势会走向何方，我们一起拭目以待。

硫酸钡对人体有毒么?
　　硫酸钡一般对人体无毒，硫酸钡属于难溶性沉淀，在人体内不会被消化，会排出体外。在医院中做胃部检查时正是利用硫酸钡对人体无毒的特点。除硫酸钡外的其他一些可溶性钡盐或可与胃酸反应的钡盐对人体有害，因为重金属离子会破坏人体蛋白质，阻碍人体正常生化反应的进行。硫酸钡不溶于水、不溶于硫酸、盐酸、硝酸等强酸。(人体胃液中含有低浓度盐酸)，所以可以用硫酸钡作为钡餐材料。吃钡餐作为胃镜的造影剂，对身体基本无害。不能用碳酸钡，因为碳酸钡溶于盐酸生成剧毒的氯化钡，致人死亡。

　　Barium sulfate is generally non-toxic to humans, and barium sulfate belongs to insoluble deposits that are not digested in the body and excreted. In the hospital to do gastric examination, it is the use of barium sulfate non-toxic to the human body. In addition to barium sulfate, some other soluble barium salts or barium salts that react with gastric acids are harmful to humans, because heavy metal ions can destroy human proteins and impede the normal biochemical response of the human body. Barium sulfate insoluble in water, insoluble in sulfuric acid, hydrochloric acid, nitric acid and other strong acids. Barium sulfate is used as a barium meal in human gastric juice, which contains low levels of hydrochloric acid. Taking barium meal as a contrast agent of gastroscope is basically harmless to the body. Barium carbonate must not be used because barium chloride is soluble in hydrochloric acid to produce highly toxic barium chloride, which causes death.

　　硫酸钡防护措施：

　　Barium sulfate, protective measures:

　　1、硫酸钡无害，不小心溅到身上，用水搓洗即可。

　　1, barium sulfate and harmless, careful not to splash water to scrub.

　　2、长久工作在这样的环境，容易患职业病：尘肺。硫酸钡生产时，工人应该做好防护措施，配带劳保。

　　2, long-term work in such an environment, prone to occupational diseases: pneumoconiosis. Barium sulfate production, workers should do a good job of protective measures, with labor insurance.

　　3、在生产硫酸钡的时候，应该厂房密闭，防止粉尘污染坏境。

　　3, in the production of barium sulfate, the plant should be closed, to prevent dust pollution.

　　4、应该有伤害,但很小.硫酸钡是难溶物,有毒的钡无法电离,进而较难进入人体,但总有极微量的钡离子,会对人体造成伤害.医院给病人胃造影用的就是硫酸钡的悬浊液,伤害很小。

　　4, there should be hurt, but very small. Barium sulfate is insoluble, toxic and difficult to be ionized barium, into the body, but there is always a trace amount of barium ions, can cause harm to human body. The hospital for patients with gastric angiography is used in barium sulfate suspension injury is very small.